Figure Use of explosive priming adapter

The adapter simplifies priming of military explosives having threaded cap wells. The adapter may be used with an electric blasting cap, with a nonelectric blasting cap and safety fuse or with detonating cord.

(2) Detonating cord clip. The detonating cord clip is a small metal device used to join detonating cord.

(3) Waterproof blasting cap sealing compound. Waterproof blasting cap sealing compound is used to moistureproof the connection between a nonelectric blasting cap and safety fuse. This compound is also used to moistureproof dynamite primers. The compound does not make a permanent waterproof seal. The newer compound is an RTV (room temperature vulcanizing) silicone rubber which seals better but takes longer to set up.

(4) Electric wire and cable. Single-conductor No. 20 AWG annunciator wire is issued for making connections between electric blasting caps or between cap and firing wire. The No. 18 AWG twoconductor table is the standard firing wire and is carried on 500-foot firing wire reels.

(5) Blasting galvanometer. The blasting galvanometer is used to test electrical firing wire circuits. It contains an electromagnet, a small, special, silver chloride dry cell, and a scale with an indicator needle. This device is being replaced by the M51 blasting cap test set.

(6) Blasting machines. The blasting machines are small electric generators that produce current for firing electric blasting caps. There are three types in Army use: the 10-cap, twisting-handle type, the 30-, 50-, and 100-cap push-down-handle (rack bar), and the newer M32 (10 cap) and M34 (50 cap) squeeze-handle types. The capacity of a blasting machine is the number of electric blasting caps that it will fire if connected in series and operated correctly Detailed information on blasting machines is contained in TM 91375-213-12, TM 9-1375-213-34 and FM 5250.

(7) Cap crimper. Cap crimpers are designed to squeeze the shell of the nonelectric cap tightly enough around the safety fuse or detonating cord to prevent separation. This crimp, however, does not interfere with burning of the powder train in the fuse. The standard cap crimper (with fuse cutter) has a narrow jaw that crimps a waterresistant groove.

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