Access Panel

Removes ammo, one at a time, from the carriers and through the guide bar places them into the gun bolts for firing. After firing, the empty cases are passed through the guide bar ejection side back into the transfer unit and hence into the empty carriers. The carriers run around the aft turnaround, enter the outer partition trackway and travel forward on the outer helix. They enter the forward turnaround and return aft by traveling in the inner partition trackway. This system carries 350 rounds...

Amefrance

Driven by spring pressure into the ignition cap of the chambered round. The cartridge contact sensor circuit is closed by the presence of a chambered round, and electrical ignition of the primer occurs. When firing with the percussion bolt, the firing pin is driven forward by action of the slide, thus striking the percussion primer. Feed Mechanism Function Flat or Enveloping Feed. The mobile rack follower on the bolt rides in the rack casing assembly. The rack is helical with a 72 twist over...

Ammunition

The ammunition used in the 5.56mm Microgun is the same as that used in the M16 rifle. It is the standard round used by the ground forces. Links have been manufactured for the 5.56mm ammunition and have shown a higher strength to weight ratio than their 7.62mm counterparts. In tests with the 5.56mm Microgun, the links have functioned reliably at rates of fire up to 10,000 spm. Six-Pak G E. (XM214) Ammunition. (Photo courtesy of Woodin Laboratories.)

Ammunition Development

Only the primer requires a small buttressed zone to maintain mechanical integrity. This reduction in case-head material, between conventional and folded design, results in a reduction of approximately 40 percent in case weight, reducing cartridge weight by 25 percent. The advantages of folded ammunition and the system improvements that could accrue from its use are outlined below Ammunition. Reduced weight, length, and bulk. Weapon. Reduced bolt stroke, gun length,...

Apr

3,030,722 RECEIVER WITH LID COVERING THE EJECTION SLOT Jessie T. Ivy, 523 Henderson St. Seattle, Wash. Filed April 20,1959 Ser. No. 807,555 1 Claim (CI. 42-16). 3,030,723 FIRING MECHANISM FOR A GAS OPERATED REVOLVER Jessie T. Ivy, 523 Henderson St. Seattle, Wash. Filed Aug. 3,1959 Ser. No. 831,288 4 Claims (CI. 42-65). 3,030,724 MAGAZINE CHARGER WITH INWARDLY RAISED RIBS James Curran, Cheadle Hulmc, England assignor to Thomas French & Sons Limited, a corporation of Great Britain Filed Apr....

April B S

3,130,513 BOLT ACTION FIREARM WITH AUTOMATIC SAFETY MECHANISM ENGAGEABLE BY BOLT HANDLE Oliver M. Knode, Jr. Hampden, Mass. assignor to Savage Arms Corporation, Westfield, Mass. a corporation of Delaware Filed Oct. 2,1961 Serial Number 142,162 7 Claims (Cl. 42-70). 3,130,638 PROJECTILE TRANSFER MECHANISM Eugene B. Horton, Jr. and Bernard A. Nicmeier, Richmond, Va. assignors tby mesne assignments to the United States of America as represented by the Secretary of the Army Filed Oct. 16,1961 Ser....

April

3,378,943 SAFETY PLUG FOR GUNS Raymond Valburg, 797 Schroeder Lane, Grants Pass, Oregon, 97526 Filed October 18, 1966, Serial Number 587,560 6 Claims. (CI. 42-1). 3,378,944 FLARE LAUNCHING DEVICE Robert Mainhardt, Callearroyo Diablo, and Edward F. Lamp, Walnut Creek, Calif. assiqnors to MB Associates, a corporation of California Filed November 15, 1366 Serial Number 594,504 6 Claims. (CL 42-1). 3,379,098 MOUNTING DEVICE FOR AUTOMATIC GUNS Louis Zurbuchen. Zurich, Switzerland assignor to...

Armour research foundation

Disasembly Ukm 2013 Machine Gun

Drum is in battery position when a roller is in the straight Drum roller follows the cam path of the operating slide as it is portion of the cam path. returned to the rear and drum begins to index. Drum roller is about to clear left cam path and adjacent roller is rotated into the right cam path. Drum position while operating slide assembly is out of battery.

Army Performs Miracle In Munition Design

While American industry has been making incremental advances in consumer products, the designers and producers of U.S. military munitions quietly achieved major breakthroughs in lethality and cost effectiveness. The spcctrum of these new munitions range from small-arms rounds to large-calibre artillery shells as well as missile and rocket warheads. An example of such an engineering miracle is the 40mm grenade round in its several configurations. The principles, techniques, and successes...

Asp

Auman, William 70 AV-8 Harrier Weapon System 7 AVCO Corporation 469 Avenger Armament System 133, 159, 161, Ballistic Research Lab 263 BAR (Browning Automatic Rifle) 248 Bell Helicopters 110,279 Belleville Washers 250 Birkigt 404 Aircraft Gun 251 Boeing Aerospace Air Defense 47, 188 Bradley Tank 248 Bren Gun 369 British Manufacture Research Company 351 Browning Calibre .50 Gun 193, 238 Browning Calibre .30 Gun 191, 273 Browning Calibre .50 M2 Gun 187 Browning, John M 191 Brown-Li pe-Chappin 191...

Assembly

Schematic Drawing of the Electrical Firing System and stationary gas tube. The propellant gases in the gas cylinder force the gas piston rearward, which causes the operating slide to move rearward. A gas port is drilled into the bottom ot the drum cradle and extends into the gas cylinder. This port allows entrapped air to be expelled as the piston is forced rearward and acts as an exhaust for the propellant gases after the piston has completed its rearward motion. Recoil forces are generated...

August

2,759,397 PROJECTILE FIRING CONTROL SYSTEM John J. Jakosky, Los Angeles, Calif., assignor, by direct and mesne assignments, of forty per cent to International Geophysics, Inc., Los Angeles, Calif., a corporation of California, and sixty per cent to Signal Oil and Gas Company, a corporation Application July 31, 1952, Serial No. 301,941 6 Claims. (CI. 89-1). 2,759,398 DUAL CONTROL FIRING MECHANISM Albert Benditt and C. Walton Musser, Philadelphia, Pa., assignors to the United States of America as...

Belt Holding Pawl

Sniper Rifles Rear Bolt Lug

Feeding Belt Feed Pawl Riding over the First Round. (6) If for any reason a round is not extracted from the belt, the belt feed pawl arm will ride up over the round, holding up the belt feed pawl to prevent double-feeding. b. Withdrawing a Round from the Belt. (l)The extractor grips the first round in the feed-way and, as the recoiling parts move to the rear, withdraws it from the ammunition belt. Initially, the grip of the extractor is held secure by the downward pressure of the cover...

Browning

But to date there has been no success. The most notable attempts being the calibre .50, M85, numerous modification to improve the Hispano-Suiza, and the G.E. calibre .50. The Browning Machine Gun, calibre .50, M2, aircraft basic, is a highly efficient automatic weapon built to precision standards. It is an air-cooled, alter-na te feed gun and, as such, may be fed from either the right or left side. It may be mounted on either a rigid or flexible mount. Manual cocking and loading of the gun is...

Cal

General Electric Family of Single Barrel Machine Guns the fixed cams in the feeder. The bolt and barrel are once again locked together through the barrel extension and all move forward together. During the forward travel of the barrel and barrel extension the second half of the feed cycle is done by means of the feed drive pin, teed drive, and feed pawl. As the barrel extension moves forward, the feed drive rotates and the inner feed pawls drive upward on the centerline side of the feed wheel....

Colt

Upon firing (by a rocker hammer pivoted on the breech ring) the locked gun recoils. When chamber pressure reaches atmospheric the breech block begins to be displaced by cam action. With no cartridge case to be ejected, the barrel comes back over the fed round during the latter portion of recoil. During the last part of recoil, the feed support tray is thrust rearward by the barrel but the cartridge it supports is held in fed position by the ramming shoe. Meanwhile, the end of the breech block...

Cycle of Operation

The cycle of operation differs from the standard Vulcan guns in that gas is tapped to drive the gun. The cam action in chambering, firing, and extracting rounds in the six rotating barrels is identical to the M61. However, a gas piston and drive cam assembly is mounted in the center of the barrel cluster in place of the externally powered drive. The gas cylinder is rigidly connected to the gun barrels and rotates writh the clustcr. The piston is double acting. It reciprocates on a ball spline...

December

2,725,655 CARTRIDGE EJECTOR Bernard Maillard Geneva, Switzerland assignor to Brevets Aero-Mechaniques,* Geneva, Switzerland a society of France Application November 23, 1951 Serial No. 257,690 Claims priority application Luxembourg November 25,1950 1 Claim (CI. 42-25) 2,725,791 CASE EJECTOR FOR GUNS Gordon P. Gravenhorst Middle River and Henry H. Franz and William A. Snow Baltimore and Walter 1. Black Middle River, Ms. assignors to The Glenn L. Martin Company Middle River, Md. a corporation of...

December B

2,863,246 BOLT ASSEMBLY FOR A FIREARM Edward C. Lee, Detroit, Mich., assignor to Ithaca Gun Company, Incorpoiated, Ithaca, N. Y. Application April 16, 1954, Serial No. 423,553 1 Claim. (Cl. 42-16). 2,863,247 SLIDE-ACTION FIREARM WITH HAMMER RELEASABLE ACTION LOCK Carl H. Benson, New Haven, Conn., assignor to 0. F. Mossberg & Sons, Inc., New Haven, Conn., a corporation of Connecticut Application August 31, 1955, Serial No. 531,798 8 Claims. (Cl. 42-20). 2,863,248 REMOVABLE CYLINDER SPINDLE OF...

Description

It is fitted with a positive locking system the rotative bolt locks With its butt folded the FNC standard version has the same dimensions as diose of the Bull Pup type weapons presently available on the market. The short barrel version, however, is 10 cm shorter than such weapons. The M249 is a true machine gun of reduced weight and size. Its effective range lies between 800 and 1,200 m. It fires belt-fitted ammunition and has a quick-change barrel. The fact...

Dixon Research

20mm Short Range Anti-Aircraft T220E2 assets were retained as a backup in case the HS 820 problems could not be resolved. interest in the T220E2 was revived later in the 1960s when some project managers said they were having difficulty with the size and weight predicted for the Vehicle Rapid Fire Weapon System-Successor. As a result, four U.S. companies borrowed T220E2 material and used them in studies aimed at a lightweight weapon system suitable for vehicles such as the Scout. The T220E2 is...

Do

The firing mechanism utilizes three major components and their associated drive springs. The weapon is manually charged, this operation opens the barrel, compressing the barrel spring, and advances the feed system to position a round in battery. The trigger is then depressed releasing the barrel which is driven closed by the barrel spring that was compressed during the charging operation. As the barrel closes, it delinks and strips the link back and cocks the firing mechanism. The barrel locks...

Enduess Chain With Equally Spaced Spring Clips To Hold Ammo

Nism to allow the top rotor to move vertically and synchronizes the bottom rotor. Between 1965 and 1968, approximately 1200 of the Mk 18 Mod 0, 40mm Multiple Grenade Launchers were produced by the Honeywell Corporation and Aeronautical Products Division, Hopkins, Minnesota. The first patent application was filed by Honeywell in 1964, however, the initial development work commenced in late 1962. The concept was originally proposed during a study on the behavior of fuzes for the M79 grenade...

Fabrique Nationale

This action compresses the driving spring, and, upon first motion of the slide, retracts the firing pin into the bolt. The link rotates upward and pulls the lock out of engagement with the shoulder in the receiver. As the lock moves up, the curved surfaces bear against the bolt which ''cracks the cartridge loose from the chamber. Tliis slow initial extraction contributes greatly to the M.A.G.'s reliability. As the slide continues rearward, die lock is completely withdrawn...

February

3,427,741 SELF-ARMING GRENADE LAUNCHER Harold H. Wiese, Davenport, Iowa assignor to the United States of America as represented by the Secretary of the Army Filed October 10,1967 Serial Number 674,353 7 Claims. (CL 42-11. 3,427,922 LOADER'S SAFETY SWITCH Donald L. Wagner, Detroit, Michigan assignor by mesne assignments to the United States of America as represented by the Secretary of the Army Filed November 13, 1967 Serial Number 682,686 4 Claims. (CL 89-28). 3,427,923 STORAGE OF LINKED...

Feed Door

Box Magazine Machine Gun

Feed Box Assembly - Top and Side View the steel insert in the ramp and is retracted into the bolt. The cartridge is crushed slightly into the tapered shoulder interface within the chamber by the bolt. During this process, the extractor claw rides over the rim at the rear of the cartridge and is forced into the groove at the rear of the case by the extractor springs. The ejectors, riding against the base of the cartridge, are retracted into the bolt face. At this point, the forward motion of the...

Feed Sjpport Tray

BM Q4 9tOC< K6IHS 0P NIM AT ZETO CHiR,RHCM. CURING COIL. BM Q4 9tOC< K6IHS 0P NIM AT ZETO CHiR,RHCM. LATE PEC0IL. FF0 Sl'JPPT TRAY THRUST 5ACX BY GLN LATE PEC0IL. FF0 Sl'JPPT TRAY THRUST 5ACX BY GLN 30US3 RA H.UE 3 AN RETAIhCS 3Y 905SCH XX Sr S RELOAD OL PINS HA3LV *UNC T - m 4U < CA< I N WiCtltli I a 1*011(0 r THf AtKl tv HI 9UIIMO PINM c Kdi LtifA I a 1*011(0 r THf AtKl tv HI 9UIIMO PINM c Kdi LtifA MMN MiOl i' O' < *i * ACIIO*. sr* i o* coriiNo.AN sr*...

Firing Lever

Transmits the firing load to the housing. The gun housing contains the camway that controls the movement of the gun bolt assemblies during the rotation of the rotor assembly so that gun cycles of feed, ram, lock, fire, unlock, extract and eject are accomplished. The housing does not rotate. It is the fixed mounting frame for other gun components and assemblies including the guide bar, the transfer unit, the pneumatic drive pinion, the lock-unlocking cams and the safing sector. There are four...

Ford buffalo arms oldsmobile

Forward beneath the drum and drum support under the action of the gas piston, drive springs and torque of drum with a stroke of five and one-half inches. Two cam paths, machined into the operating slide body, engage the rollers and cause the drum to rotate as the slide moves to the rear. The driving springs and inertia of the revolving drum acting through the rollers forcc the slide forward. These two cam paths consist of curved portions three and one-half inches long which curve in toward the...

Fps Apds

Rate of Fire Variable to 2000 spm Feed Recoil Force Average 2000 spin 2300 lbs. Average 750 sprn 860 lbs. Peak Max *1800 lbs. Peak Recurring *1700 lbs. *Values for the AIMS I lelicopter Turret firing at 750 spm A Reciprocating Lover Synchronizes Firing and Round Flow.

Functioning

After entry of the bolt lugs into the barrel extension, the bolt (2) is stopped by the rear end face of the barrel. The bolt carrier (4) continues forward its cam pins (.3) turn the bolt and locks the weapon. The firing pin (5) following with the bolt carrier ignites the primer of the cartridge. Unlock, Extraction, Ejection. The spring package (1) of the recoil buffer on the weapon housing takes up the recoil energy. Part of the energy is absorbed by the belleville springs....

Functioning of the Weapon

Gun Bolt Lock Mechanism

The breech block is open and the driving spring is compressed to the maximum. Forwarding oj Breech Block. The sear (a) being lowered by the trigger lever (al) frees the breech block which is thrown forward by the driving spring (b). Introduction of the Cartridge. The breech block pushes the cartridge (c) out of the lips of the feed mechanism and inserts it in the cartridge chamber. Locking and Firing. When the breech block reaches the end of its forward run, the lock (d) moves...

General Electric

Machine Gun

A need for an improved variable rate-of-fire weapon for die utility helicopter role was stressed at the USMC Armament Conference, June 12, 1980. Recommendations from the conference were to investigate a new weapon capable of being fired manually by a gunner from a pintle mount or by the pilot with the weapon in a fixed forward position for air-to-air combat and ground threat suppression. The development of a new weapon solely to meet the armament requirements of the utility helicopter is...

General Specifications

Length of Gun 40.45 ins. Width of Gun 13.31 ins. Height of Gun 8.10 ins. Muzzle Velocity 790 ft sec Maximum Effective Range 1600 m Rate of Fire 325-375 rds min Rounds Between Failure) 3513 rds Mean Time to Repair) 3.5 min. Gun Life (Minimum) 50,000 rds Mounts Turrent, Tripod or Pedestal Firing Mechanism Electrical or Manual Ammunition 40mm Grenades M383 (High Explosive) M384 (High Explosive) M385 (Practice) M430 (Dual Purpose HEDP) Preproduction Phase - May 1981-Feb....

Gokh

Linkless Feed System

Chute. fixed. exit chute. conveyor. return < 1s) < 231 of fired cases. To do this the safety and cocking cam on the gun is closed to cam the cocking pin across the sear that is used for firing. Hydraulic Drive for the Avenger Gun and Linkless Feed System The hydraulic drive system provides power for dual rate operation of the Avenger GAU-8 A 30mm gun and the Linkless Feed System. The high rate is 4200 spm and the low rate is 2100 spm. The drive can also be operated manually at low rates of...

Grenade Launcher

They needed a new system to deliver effective area firepower at a range greater than that available with the conventional hand grenade. Analytical and engineering prototype studies confirmed that a 40mm controlled fragmentation projectile could be readily launched 437 yards with a simple, low-momentum weapon. It therefore appeared possible to equip the infantry with a weapon system of exceptional firepower effectiveness. The translation of concepmal and prototype studies to low-cost, versatile,...

Gun Bolt Description and Operation

The Avenger's gun bolts are made up of three components the bolt head and firing pin, the bolt body and cam follower, and lock-unlock cam follower. When assembled these components are held together by two roll pins, so that the complete gun bolt is a secured assembly when free of the gun, and the pins arc in placc. The bolt is inserted into the gun (and removed) as a complete assembly. The gun bolt body has four tracks, two forward and two rear, used for keeping the bolt sccurcd to the rotor...

Gun Bolt Operation and Description

The Minigun gun holt is simple and rugged. It has three major parts, the bolt body with roller, the bolt head and the firing pin with spring. The gun bolt operates in typical Vulcan Gatling fashion by being driven around the gun by the interaction of the rotor revolving inside the fixed gun housing. The gun bolts, there are six, one for cach barrel, rotate with the rotor and can slide fore and aft on longitudinal rotor trackways. The fixed main cam on the inside of the gun housing, drives the...

Hispanosuiza

These guns can be fired either in automatic or single shot in any position about its axis, through 360 . Two rates of fire are available, selection being made by remote control. The ejection of the fired cases occurs between the two feeders. The ejection of the used links is on either side of the case ejection and in the same direction. Firing starts from the breech-open position. As the breech bolt moves forward it picks up a cartridge in the feed mechanism, pushes it out of its link and...

Hom

Ejects the empty case from the previous round forward out of the gun. The rammer is rotated to carry the live round down into line with the bore and then moved forward to feed the round into the chamber. The rammer releases the sliding block which pushes it into a recess in the breech ring. The gun is now ready to fire and the firing hammer is released from the sear by the gunner operating either the firing button or a solenoid. Mechanical safety before firing is controlled by the breech block...

Hughes

The rear of the reciprocating bolt, contacts the base of the round and moves it forward out of the link. This is accomplished during sprocket rotation without interferring with the link. After stripping, the link falls awav down a link chute. During the next cycle of the gun, this prestripped round is cammed, by the sprocket, under a spring-loaded platten and onto the top of the bolt. As the bolt moves to the rear and trom under the round, the round is forced down onto the feed lips and is...

Civ

Homemade Muzzleloader Revolver

Bolt Carrier in Battery, Firing Pin Protruding through Bolt, Igniting Primer, Firing Cartridge. Firing. Firing takes place when the primer ignites the propellant charge in the chambered cartridge. The firing pin is fixed to the bolt carrier and moves with it. After the bolt is completely locked, the firing pin begins to protrude through the bolt as the carrier continues on into battery. At the instant the carrier has completed its forward movement, the firing pin protrusion is sufficient to...

Iiarrsi

Gau Capacity

Primary Mission Sustained close air support Powerplant . . . Two General Electric TF34-GE-100 turbofan engines, each about 9,000 lbs. Length 53 ft. 4 in. (16.25 m) Height 14 ft. 8 in. (4.47 m) Wingspan 57 ft. 6 in. (17.53 in) Internal Fuel Capacity 10.700 lbs. (4,853 kg) Operating Weight 25,000 lbs. (11,340 kg) Maximum Gross Weight____ 50,000 lbs. (22,680 kg) Armament One 30mm General Electric Ammunition Capacity 1,174 1,350 rounds Firing Rate 2100 4200 rpm...

Incoming Round Actuates Valve

Oilei Valve Actuated by Incoming Round. Pump Oils Next Round as Belt Moves Out from Under Plunger. begins to recover and the gun is moved forward in counterrecoil. The recoil housing assembly ring spring acts as a buffer during counterrecoil, should the machine gun travel forward past its battery position. The ring spring is compressed in the same manner as on recoil motion of the machine gun. However, the action of the parts is exactly reversed to return the machine gun to the battery...

Info

Ward motion of the barrel and barrel extension is slowed to a stop within the available .50 inches of barrel buffer travel. The barrel and barrel extension pushed forward by the barrel buffer and barrel extension drive springs. The barrel and barrel extension are then stopped by the accelerator and held at the 2.13 inch point. The accelerator cam is buffered to absorb the energy of again stopping the barrel and barrel extension. During the rearward travel of the barrel extension, the feeder is...

Ldn

AFTER FMI NO, UN LUB RIC ATE 0 ROUND STICKS. FRESSURE SEPARATES CAS OuC TO SLACK BETWEEN BREECHBLOCK LOCK AND BREECHBLOCK LOCKINft KEY Muzzle Velocity of Projectile 3543 fps Practical Range of Projectile 9844 ft. Weight of Cartridge 870 g Weight of Projectile 360 g Charge, Type UIA 42 g Serious Malfunction Occurs if Ammunition is not Lubricated.

Jane

2,750,700 CLAMP ASSEMBLY FOR A TRIGGER HOUSING Earle M. Harvey, Agawam, Mass., assignor to the United States of America as represented by the Secretary of the Army Application May 7, 1953, Serial No. 353,700 4 Claims. (CI. 42-75) (Granted under Title 35, U.S. Code (1952), sec. 266). 2,750,841 EXTRACTOR SPRING RETAINER FOR A FIREARM Frank C. La Borde, Springfield, Mass., assignor to the United States of America as represented by the Secretary of the Army Application March 24, 1953, Serial No....

January

2,776,513 LEVER ACTION FIREARM Emest C. Neal, Chicago, III., assignor of one-half to Elmer Brandell, Chicago, III. Original application July 25, 1951, Serial No. 238,417. Divided and this application August 20, 1952, Serial No. 305,429 12 Claims. (CI. 42-16). 2,776,599 JAM-PROOF GUN AMMUNITION FEED CAN Raymond A. Starry, Holicong, Pa., assignor to the United States of America as represented by the Secretary of the Navy Application August 31, 1953, Serial No. 377,744 2 Claims, (CI. 89-34)...

July

2,752,714 STABILIZER FOR FIREARMS Louis F, Landwehr, Jefferson City, Mo. Application January 23, 1953, Serial No. 332,897 7 Claims. (CI. 42-75). 2,752,825 CAL. .30 MULTIPLE MACHINE GUN CARRIAGE Herman Jackson Crigger, Lawton, Okla., and James O'Berne Millott* Lakewood, Ohio, assignors to the United States of America as represented by the Secretary of the Army Application March 17, 1953, Serial No. 343,002 4 Claims. (CI. 89-37) (Granted under Title 35, U.S. Code (1952), sec. 266). 2,752,826...

June

Clarkson Hamden, Conn. assignor to Olin Mathieson Chemical Corporation New Haven, Conn. a corporation of Virginia Application November 24,1954 Serial No. 470,901 22 Claims (CI. 42-17). 2,794,369 SIDE-STRIPPING CARTRIDGE BELT LINK Burns Darsie, Rockford, III. assignor to the United States of America as represented by the Secretary of the Army Application December 14,1954 Serial No. 475,320 8 Claims (CI. 89-35). 2,795,171 BREECH MECHANISM FOR A RIFLE Alonzo F....

Link Development

Simultaneously with the development of the gun and ammunition, a compatible link was designed and built for use with the T168 gun. An open type, one-piece link was proposed at the conclusion of Phase A. The design was similar to the T63 link which also used the hook and eye type connector. An open type link was necessary at that time because the specifications called for a relinking type feeder as well as a conventional disintegrating type. A relinking feeder positioned empty links in front of...

Lock And Fire

Actually bolted to the underside of the housing's main cam at the beginning of forward dwell. This lock cam is contacted by the top oi the roller shaft immediately after finishing the ram stroke. As the gun rotates, the roller shaft is forced downward, or radially toward the center of the gun. The shaft is pinned to the lock block, so the lock block is forced down to its locked position. The front radiused edge of the block remains engaged to the bolt body's radius so that the lock block takes...

M

Links, empty caes and duds are ejected overboard from the gun with sufficient velocity to eliminate any danger of damage to the aircraft. The ammo box is loaded by hand on the ground. It slides out of the port side and is supported by the slide during loading. This same armament system has been applied to the OV-IO aircraft. The turret is loeated beneath the aircraft underneath the cargo area. The ammo storage container is inside the cargo bay.

March

3,431,668 FIREARM RECEIVER AND BOLT WITH COOPERATING GUIDE MEANS Robert J. Creamer, East Haven, New Haven, Conn. assignor to Olin Mathieson Chemical Corporation a corporation of Virginia Filed June 22, 1967 Serial Number 648,004 2 Claims. (CL 42-16). 3,431,669 FIREARM EJECTOR Edward L. Morrow, Fairfield, Conn. assignor to Olin Mathieson Chemical Corporation a corporation of Virginia Filed February 25, 1966 Serial Number 530,145 10 Claims. (CI. 42-25). 3,431,815 DISCARDABLE ROTATING BAND William...

March tSC

3,125,928 PACKING RING FOR FIREARMS Erich Bartels, Ratingen, near D sseldorf, Germany, assignor to Firma Rheinmetall G.m.b.H., a firm of Germany Original application Sept. 26, 1960 Ser. No. 58,439 now Patent No. 3,009,937 dated Aug. 6, 1963 Divided and this application June 15,1962 Serial Number 202,908 Claims priority, application Germany September 26,1959 2 Claims (CI. 89-26). 3,125,929 SHOOTING REST Howard Peasley, Portville, M.Y. (423 Wygant Road, Horseheads, N.Y.) Filed Mar. 30,1961 Ser....

Maremont

M60 Machine Gun

For Personnel Carrier Employment a Short Gas Evacuator Tube is used. ward to contact the firing pin rear spool. This compresses the firing pin spring withdrawing the firing pin from the cartridge primer as well as compressing the operating rod spring. Rearward motion of the operating rod continues in the dwell slot of the bolt rotating cam, until the rod yoke rollers contact the spiral, or counterrotating part of the bolt cam. The bolt now begins its counterclockwise rotation and unlocking,...

May

2,938,432 REMOTE CONTROL DEVICE Andrew J. Grandy, North Hilts, Pa., and William E. Perkins, Runnemedc, N.J., assignors to the United States of America as represented by the Secretary of the Army Filed Jan. 6,1959, Serial No. 785,301 2 Claims. (CI. 89-27) (Granted under Title 35, U.S. Code (1952), sec. 266). 2,938,433 BIPED MORTAR MOUNT Joseph Raymond Jasse, Paris, France, assignor toSte Hotchkiss-Brandt, Paris, France, a corporation of France Filed Dec. 26, 1957, Serial No. 705,287 Claims...

McDonnell Douglas helicopter company

30mm ASP (Automatic Self-Powered) Automatic Cannon According to McDonnell Douglas Helicopter Company, they are developing a 30mm lightweight, self-powered, automatic cannon which is readily interchangeable with calibre .50 M2hLB machine guns. This weapon, firing inventory 30mm M789 HEDP or interoperable ADEN DEFA ammunition, provides an order of magnitude improvement in firepower from a variety of pintlemount installations on light combat vehicles. Gas operated and, therefore, mount...

Mechanical Connection

ELECTRICAL UNES * LOAOED ROliNOS o eMPTY SHELLS placed in operation. Air, stored in the pressure-vessel of the pneumatic storage assembly, is released by the pressure control assembly. The pneumatic drive assembly drives the gun and the ammunition feed and storage system. The system is controlled by signals supplied from the Electronic Control Unit (ECU). The ECU is a small metal box located in the aft section. It controls gun firing and clearing sequences, the quick reappli-cation of the...

Miai

Beretta Choke Chart

More efficient packaging of rounds was accomplished within the same overall space of the drum. Lightweight designs and materials were also utilized for large weight savings with extra stored ammo. All components arc mounted on a pallet. The storage drum is mounted below the pallet, and the Vulcan gun is attached above the pallet at its recoil adapters. Further, gun support is provided at the muzzle by a gun gas deflector and bearing which is a part of the aircraft. This modular pallet design...

Mm High Explosive Ammunition Type HEIT

The muzzle velocity of this ammunition is 1080 m sec (3543 ft sec) and the time of flight for a range of 1500 meters is on the order of 1.78 seconds. The projectile of a weight of360 grams contains 50 grams of high explosive which is approximately five times the quantity contained in an ordinary 20mm high explosive projectile. This ammunition has a shuttered fuze, thus the detonation train is not broken until after leaving the barrel when the shutter brings the detonator into line with the...

Mm M Bushmaster

Dual feed, externally powered cannon using patented Chain Gun action for vehicle or shipboard mounting. Standard on M2 M3 Bradley Fighting Vehicles and LAV-25. (Bushmaster II, a larger version of the M242, Is in development.) Caliber 25mm U.S. M790 Series, NATO Rate of Fire SS, 100, 200, 500 spm Weight 244 lb Dimensions 108.7L x 13W x 15MH

Mm T Short Range Antiaircraft Gun

The T247 was an attempt to redesign the T220 while keeping the same basic rotating bolt locking mechanism. In August 1956, work on the T247 gun was started at American Machine and Foundry to investigate what weight savings and overall weapon simplifications could be achieved assuming the dual rate could be effected simply by changing the timing of the bolt unlocking, which always operated by short recoil. Preliminary firings at Springfield Armory indicated that this might be possible since...

Mrbs

The combined efforts of the expanding return springs reasserting themselves and the inertia of the breech cylinder camming upon the slide carry the slide and feed pawl forward completing the 72-degree rotation of the breech cylinder and firing a round. During the counterrecoil of the feed slide, a round is stripped from its link, a second round is chambered, and the empty case of the round originating the cycle is ejected. When a round is fired, the barrel, breech cylinder housing, and breech...

Nosl

The recoil force from a fired round drives the bolt and inertia bar, which are securely locked to the barrel and barrel extension, toward the rear. The next round, having been connected to the bolt by the top extractors, is stripped from the link and starts rearward with the bolt. After The bolt travels approximately five inches to the rear before the vertical cam engages the cam follower and begins to move the indexing pivot arm around its pivot point. As the bolt and...

November

3,111,061 OPERATING MECHANISM FOR GUN BREECHES Paul Zehfeld, Dusseldorf, and Herbert Grossechopf, Grevenbroich, Lower Rhine, Germany, assignors to Firma Rheinmetall G.m.b.H., Dusseldorf, Germany Filed January 30, 1962 Serial No. 169,780 Claims priority, application Germany February 6,1961 6 Claims. (CL 89-24). 3,111,882 MUZZLE VELOCITY COMPENSATING DEVICE C. Walton Musser, Beverly, Mass. assignor to the United States of America as represented by the Secretary of the Army Filed July 5, 1961...

October

2.720.819 MAGNETIC RECOIL MECHANISM FOR GUNS James H. Ryan Morristown, Tenn. and Donald P. Smith Maryland Park, Md. assignors to the United States of America as represented by the Secretary of the Army Application May 25,1951 Serial No. 228,350 1 Claim (CI. 89-43) 2.720.820 HYDRAULIC BREECH OPERATING MECHANISM Paul H. Dixon and Donald E. Rutter Rockford, 111. assignors to the United States of America as represented by the Secretary of the Army Application June 2,1950 Serial No. 165,814 7 Claims...

Oerlikon

On passing the gas-port, the propellant gas-pressure acts on two pistons which drive back the operating slide. As it goes back the operating slide causes the cylinder to turn through one eighth of a turn. Then the operating slide goes forward under the operation of its recuperator springs and the momentum of the cylinder. The cyclc starts again. While rotating, the revolver drives a shaft carrying four sprocked wheels into which the ammunition belt is engaged. The empty links eject at the...

Oil Inlet Into Chamber

Federal Centerfire

OIL OR THE NFXT SHOT RUMS INTO CYLINDER IN FRONT OF THE PISTON QLOw 3ACK UASES SUCK OIL INTO THE CHAMBER OIL OR THE NFXT SHOT RUMS INTO CYLINDER IN FRONT OF THE PISTON QLOw 3ACK UASES SUCK OIL INTO THE CHAMBER Blowback Gases Atomize Small Quantity of Oil, Lubricating Chamber. Oil is Pumped by Action of Recoiling Gun.

Openchamber Concept

Complete sets of detail and assembly drawings for experimental gun, model No. 1, 1A, and 2, and the single-shot test fixture. 7. A set of drawings of a proposed brake and brake-fixture design. 8. Design layouts of the nine weapon designs evolved during the initial phase of the program. In addition, 300 rounds of ammunition were manufactured. All work was completed by March 1959. The weapon design and development program, as of January 31, 1959, the termination date of the contract, produced a...

Path Of Travel Of Shell Prevents Double Feed

Feed Path Makes Double Feed Impossible An absolute minimum of electrical circuits are included with this gun. The gun itself has only one motor and one mechanical switch, both of which are suitably protected from either generating electrical interference or being affected by it. Loading and downloading of the gun is accomplished by a mechanical disconnect and hand crank. Failsafe design will prevent the possibility of inadvertent firing. An electrically released mechanical brake within the gun...

Philcoford

The rotation of the stave assembly drives the live rounds toward the forward end of the drum where they are scooped from the drum helix by the handoff sprocket. The rounds are placed in the empty conveyor elements of the forward loop by the forward interchange. They travel through the feed flex chute to the terminal sprocket where they enter the gun and arc fired. The spent cases are handed off to the terminal sprocket and carried to the forward interchange by the return chute where they are...

Pneumatic Drive for the GAUA Gun and the GPUA

The pneumatic drive assembly in the aft fairing assembly consists of the following components pressure control assembly, turbine motor and control assembly. The pressure control assembly consists of a low pressure switch, a pressure transducer port, a pressure regulator, and an electrically controlled shut-off valve. The pressure control assembly regulates the pressure supplied to the motor and control assembly when electrically switched on. The motor and control assembly consists of the...

Pojecrsyr cfof ozyvyr

'-yyy pc y y s z y y) o D vyyt y c cysyyyy oy y Ftr rsc s y .ocy y Gyy Fin Forming Projectilo Generalized Concept In the area of barrel design, various concepts for the manufacture of a fin forming barrel was evaluated. A possible typical external and overall barrel configuration concept was extended. A feasibility test of such a barrel configuration and its manufacturing concept was also attempted. One theory of the success of the fin forming technique is the internal forming configuration of...

Positioner

Cut-A-Way of Brunswick 25mm Telescoped Round showing Major Components. ignition, the seals are pressure actuated to provide a seal between the chamber and the barrel and between the chamber and the breech. The chambers arc basically cylinders with cam rollers on lug extensions which control the chambers during transport in the gun. The chambers remain under positive control at all times in translation from rammer sprocket to the receiver cam rollers. The rammer cage and receiver, driven by a...

Rimmed

Pon oncc and to cause the projectile to function at the desired time and place (blank and drill rounds excepted). Dependent upon both the type of propelling chargc and the method of loading into the weapon, complete rounds of artillery ammunition are known as fixed, semi-fixed, or separate loading. Onlv fixed ammunition is used in automatic wea-pons. Fixed ammunition consists of complete rounds in which the propelling charge is fixed that is, not adjustable, and which are loaded into a weapon...

Rod Buffer And Spring Assy

Boxes is particularly recommended for an assault or an approach march. As a comparison, a solider armed with the Minimi and a box of 200 rounds carries the same weight as one equipped with a heavy barrel automatic rifle of the FALO type provided with three magazines of NATO 7.62 ammunition (60 rounds). If we put a 30 round FNC magazine onto the Minimi, we obtain the same fire-power as a BR EN, which is exactly twice as heavy to carry. Equipped with a box containing 200 cartridges, the Minimi...

Rounds Per Minute

Machine Gun Rounds Per Minute

Up to 1250 rpm at 100-pound belt load The latter, which are conncctcd through the bolt body by means of a key that carries the firing pin, are now driven on by the combined action of the breechblock-slide springs and the inertia of the entire assembly, causing the firing pin to strike the primer. The powder charge in the cartridge is thereby ignited. The bolt is positively locked at the instant of firing and remains that way until tlie projectile has passed the port in the barrel, at which...

Rrig

Helix Ammo Magazines

There is a tube between the gun and the helix. The helix is an actual double-layer helix of ammunition carriers that are linked to each other at both the ammo base and projectile ends forming a continuous loop of ammunition. The double layer helix is constructed by fixed partitions fastened to the tube forming a continuous helical shape from the rear of the gun to the muzzles. At both the rear and muzzle ends, turnaround units are located. The partitions have two tracks one outer...

Section Ii Pachmayr

The objective of the T154 program was a design study to determine the feasibility of an automatic aircraft gun capable of firing the 30mm < VADEN projectile at a cyclic rate of 4,000 rounds per minute and at a muzzle velocity of 3,000 feet per second. In addition to these requirements, limitations were placed on weight, ejection and distance from the base of the projectile to the rear of the gun. The ultimate objective of the T154 program was the development of the smallest turret type weapon...

September

2,762,264 SIDE-STRIPPING CARTRIDGE BELT LINK Russell Fagerberg and Keith Miller, Rockford, 111., assignors to the United States of America as represented by the Secretary of the Army Application March 11, 1955, Serial No. 493,841 2 Claims. (CI. 89-35). 2,762,265 GUN MOUNTINGS CARRIED BY MOVABLE SUPPORTS Arend Willem Kuijvenhoven, Barrowby, Grantham, England, assignor to Society Brevets Aero-Mechaniques, S. A., Geneva, Switzerland, a society of Switzerland Application July 24, 1950, Serial No....

Slider Right Side

Breech, align the firing pin with the primer and position the firing pin within striking range of the firing hammer. Two pairs of extractors control the round and cartridge case during ramming, extraction and ejection. Feeder. The feeder is simple and consists of parts contained in the receiver housing. A sprocket advances the ammunition belt through the gun where cam actuated strippers push each round out of its link. The sprocket is powered by a drum cam that, in turn, is driven by the gun...

Springfield Armory

The T164 Calibre 50 Machine Gun is a smaller calibre version of the Calibre .60T130 and 20mm M39 revolver type machine guns. One difference is that the T164 fires percussion primed ammunition while the other two fire electrically primed ammunition. TheT164 weapons were gas operated single barrel revolver guns with five and six chamber drums. The ammunition was held in disintegrating metallic links and could be fed from either side by a sprocket type feeder. The last version of the Series,...

Suoe

Cutaway View Firearm Firing

Gas-Operated Cam-and-Gear Driven Open-Chamber Gun - Cutaway View The Open-Chamber Principle The opcn-chamber is radically different in pnnciple from the closed chamber used in conventional guns. Although the closed firing chamber provides a practical method for restraining the cartridge case during the firing period it is subject to objection because of the time required for the reciprocating action necessary to move the cartridge a distance equal to its length during the loading and unloading...

System Description

The M60E2 machine gun for tank use is basically an M60C model with a barrel extension and a gas evacuator system. The large inside diameter of the barrel extension, approximately two and one-half times the 7.62mm bore, allows the gases to expand and be directed to the outside of the vehicles compartment. The extension is screwed onto the barrel using the same threads as the flash suppressor. The flash suppressor is then incorporated onto the outer end of the extension. Barrel extension length...

T

Section of Self Powered Weapon Concept the locking recesses and locked in place. Prior to insertion of the bolt into the barrel extension locking recess, the cam pin which connects the bolt and bolt carrier is lying in a dwell portion of the cam in the bolt carrier thus there is no torque applied to the bolt throughout most of its forward stroke. However, as the bolt begins to enter the barrel assembly, the helical flanks of the bolt locking lugs meet the helical surfaces of the lug passages in...

Test Results

Various test firings showed that the most serious deficiency of the T220E1 was the operation of the feed mechanism by the barrel. Test firings revealed that the motion of the barrel (feed pawls), and the motion of the bolt must be synchronized within very narrow limits to obtain positive feeding. These experiments also indicated that the time of barrel recoil and the counterrecoil cycle vary with changes in the belt pull, the rigidity of the mounting structure, the stiffness of the recoil...

The Machine Gun

The ammunition for the 7.62mm machine gun M60 is classified as small arms ammunition and is issued in the form of a complete round (cartridge). A complete round consists of all the components necessary to fire the weapon once, that is, projectile (bullet), cartridge case, propellant powder, and primer. Based upon type of projectile, ammunition authorized for use in this gun is classified as outlined below. a. Armor-piercing-incendiary cartridge, for use against light armoured or other bullet...

Tj

Feed drive rack and pulls it rearward. This drives the crossfeed rack to the left, to pick up the next cartridge from the feed tray. The release rod moves to the rear permitting the bolt sear to raise upward in a position to engage the bolt. The ejector rotates inward, ejecting the empty case. The feed drive rack is released from the bolt and starts to move forward, driven by the feed spring. The bolt continues rearward until it strikes the buffer, which absorbs the recoil energy. The bolt...

United kingdom

United Kingdom French 30mm Aden 30mm DEFA Guns An early version of this weapon was extensively covered in Volume III of The Machine Gun. The ADEN is now operational with United Kingdom Forces and other countries. It is used by the U.S. Marine Corp, primarily because it wras the standard on-board weapon for the AV-8A Harrier aircraft. The 30mm Aden gun is a large calibre revolver type machine gun with a high rate of fire and is designed for use in a fixed position in aircraft. The gun is fired...

Us Army Ordnance Corps

The calibre .50 basic aircraft machine gun AN-M3 is an automatic, recoil-operated, link-belt-fed, air-cooled machine gun having a rate of fire over 1000 rounds per minute. A metallic link disintegrating belt is used to hold the ammunition while it is being fed into the gun. By changing the position of some of the component parts, the gun may be set up so that the ammunition can be fed from either the left- or right-hand side. The gun is similar in general appearance to the calibre .50 basic...

Aeronutronic Gun Launcher

In early 1969 Aeronutronic Division of Philco-Ford proposed a weapon concept utilizing counter-recoil operation which would meet Army requirements and offer advantages over similar inventory or development weapons. This concept was directed towrards the 40mm automatic grenade launcher on the basis that a proposed Qualitative Material Requirement was being reviewed for Army calendar year 1975 requirements and because inventory ammunition would be immediately available for the development of the...

Hm

M85 Major Groups and Components (Exploded View) the high cyclic rate of fire of the T175E1 was from 60 to 100 pcrccnt more than that of the M2, a significant advantage for a weapon that was to be fired at low-flying aircraft. Some disadvantages of the T175E1 were disclosed during the tests. When fired at the low rate, the gun was generally less reliable than when fired at the high rate. The rate-reducing mechanism increased the cost of the weapon. The feeding mechanism of the T175E1 was not as...

The Chain Guns mm EX mm M and mm M

Desert Eagle Handgun

HUGHES TOOL COMPANY (Presently McDonnell Douglas) The Chain Gun in calibre WECOM 30mm fired its first round in April 1973, four months after initiation of the program. In July, the U.S. Army Armament Command sponsored a 2500-round feasibility firing test that was successfully completed with the prototype (A Model) gun on 13 September 1973. During the summer of 1974, the second generation (B Model) Chain Gun underwent tests in accordance with the Hughes program schedule for the Advanced

Preface

A series of publications entitled The Machine Gun, sponsored by the Bureau of Ordnance, Department of the United States Navy, was prepared with the belief that the next best thing to actual knowledge, is knowing where to find it. The research summarized within the covers of these volumes was compiled in such a manner as to place in the hands of those rightfully interested in the art of automatic weapon design, the world's recorded progress in this field of endeavor. Volume V begins with 1952...

Mm Me Machine Gun

Continuing since 1967, Marcmont has conducted an in-house program to provide a modified M60 machine gun that would be suitable for service in tank and other enclosed vehicular installations. The M60E2 offers the armed forces an alternate 7.62mm tank machine gun to the M37 or M219 types. The main features of the M60E2 machine gun are a gas exhaust system that collects the spent gas from around the gas cylinder group and directs it forward to the muzzle area and a barrel extension which carries...

Naval Ordnance Station Louisville

Naval Aircraft The 1950

Navy initiated a research program during the early 1950's to investigate the best approach in the field of automatic weapons for aircraft and antiaircraft use. The purpose was to determine the feasibility of combining superior features and well known principles with advancements in ballistics and metallurgy, to produce in a simpler and more reliable automatic weapon than was in use or contemplation. One primary aim was to eliminate gas operation and ram feeding. This program led to the...

Ge

General General Electric Corportion 5, 8-11, 27, 38, 42, 45, 47-50, 53, 57, 59, 66, 67, 69-71, 83-85, 87, 90, 91, 93, 96, 99-101, 105, 109 110, 117, 119, 121-123, 125, 129, 150, 159-161, 172, 177, 181, 193, 211, 234, 245, 281, 329, 365, 371 General Motors Corporation 119, 191, 401 General Impact Extrusion Corporation 470 Goalkeeper Weapon System 7, 11, 154 Gorgas, Major General 3 Machine Gun) 216, 247, 248 GPU-2 A Pod 7, 53 GPU-5 A Pod 7, 11, 159, 160, 161, 163, 167 Green, Dr. S. Y 191 GTAS...

Frank S Preston-fairfield

3,383,790 PLASTIC BOX MAGAZINE WITH A TOP METALLIC CLAMPING MEMBER Henry A. Into, Wallingford, Conn. assignor to Olin Mathieson Chemical Corporation a corporation of Virginia Filed May 16, 196 Serial Number 638,632 8 Claims. (CL 42 -50). 3,383,984 COMPACT CONSTANT PRESSURE LUBRICATOR FOR THE 20 MM HS 820 GUN SYSTEM Giuliani) O'Andrea, Troy, N.Y. assignor to the United States of America as represented by the Secretary of the Army Filed December 14, 1966 Serial Number 601,813 8 Claims. (CL 89-...

Elton Billingslea

3,503,149 REVOLVER FIRING ACTION MECHANISM Hubert F. Hedges, 85 Richmond Hill, New Canaan, Connecticut 06018, and Richard R. Bergmann, Perry Avenue, Norwalk, Connecticut 06850 Filed January 5,1968, Serial No. 696,066 1 Claim (CL 42-65). 3,503,150 CARTRIDGE HOLDER FOR A REVOLVER Werner 0. 8runhuber, Stamford, Connecticut (19 W. 24th St., New York, New York 10010) and William C. Bye, 169 Cypress Ave., Bronx, New York 10454 Filed March 8, 1968, Serial No. 711,701 6 Claims (Cl. 42-89). 3,503,299...