Nonelectric blasting caps

MATERIALS Small container such as a paper cup or tin can, rubber contraceptive or toy balloon, sugar-chlorate mixture (see section on incendiaries), concentrated sulfuric or nitric acid, nonelectric blasting cap. 

To activate the delay, first fasten the container securely in an upright position. Make a hole in the side of the container near the bottom and insert the open end of a nonelectric blasting cap. Be sure that some of the sugar-chlorate mix gets into the open end of the cap. The business end of the blasting cap can be inserted directly into the explosive charge or connected to the charge with primacord. To start the delay, carefully place a spoonful of concentrated acid in the pocket of the membrane—... 

Place the acid ampule into a rubber contraceptive or toy balloon, along with a few spoonsful of sugar-chlorate mixture and one nonelectric blasting cap. Then tie the opening of the rubber container tightly. See Figure 17. 

MATERIALS M-2 fuse lighter, trip wire or string, nonelectric blasting cap. 

Cut two pieces of primacord of exactly equal length, at least 6 feet, and crimp a nonelectric blasting cap to one end of each. Tape or tie the other ends of the primacord together. 

MATERIALS Tin can or bottle, sand, stones, strong cord, TNT or plastic explosive, nonelectric blasting cap, delay firing device (time pencil or time fuse). 

Now prime the charge with a nonelectric blasting cap and a delay device (time pencil or safety fuse) and initiate the delay. Dual priming is advisable, particularly if the time pencil delay is used. 

MATERIALS Metal fragments (nails, washers, bolts, nuts, screws, etc.), rags, string or tape, time fuse, nonelectric blasting cap, % pound of any high explosive. 

MATERIALS Fuel-tight container (approximately 2 gallon volume), plastic explosive, ther-mate, primacord, nonelectric blasting cap, delay device. 

Prime the charge either with a triple roll prima-cord knot or a nonelectric blasting cap. Figures 64 and 65 illustrate properly made up charges. 

Bomb Burster, C8R1, shown in Fig 5-12, consists of a tubular fiber body, 0.47-inches in diam and 3.07-in long, partly filled with 2.5 g of Tetryl and provided with a nonelectric blasting cap at the open end of the tube. The end of the tube contg Tetryl is closed by a fiber plug. This burster is a component of igniters M15 ... 

Development of Electric Detonators T60 and T<31 (March 1959) (Conf) PATR 2606 F.K. VanArsdel, "Development of T6 Electric and T7 Nonelectric Blasting Caps" (April 1959) (Conf) PATR 2610 D.E. Seeger et al, "Development of a Detonator for Use in the T358 Shell System" (July 1959) (Secret) PATR 2645 E. Bertrand, "Development of a Pyrotechnic Photo Relay for Use with a Photocell Contact Fuzing System (March I960)... 

Safety fuse A waterproof coated, thread-wrapped cord filled with black powder designed for initiating a nonelectric blasting cap. 

Add S parts primary explosive (mercury fulminate, lead azide, etc.) and stir until well mixed. A 1-quart bottle holds about 800 grams of this mixture. If you have access to plastic explosives, an excellent ratio is 40 parts gasoline and 40 parts C-4. Stir until a smooth mix is obtained, then pop in two nonelectric blasting caps. The polyiso-butylcnc in the C-4 helps to gel the fuel. 

A 1/2-inch long piece of 1/4-inch steel pipe is fitted into the coupling. This is reamed with a drill to snugly fit a. 30-calibcr carbine cartridge case or whatever is available. The carbine case is of a size that allows the insertion of a commercial nonelectric blasting cap with no modifications. 

The capillary fuze i simple to construct and use. Popular with the anarchists around the turn of the century, it fell into disuse with the introduction of cheap, reliable alarm clocks and the increased availability of electric blasting caps. Speculation has it that the San Francisco Market Street bomb of 1916 used a timer of this type. It can be quite accurate if all the variables—including temperature, angle, and construction of the wick—are taken into account. This is why it should be thoroughly tested before being used on an operation. In operation, the sulphuric acid is drawn up the cotton wick by capillary action until it contacts the chlorate, at which time it ignites. The blob of chlorate can be imbedded in an incendiary mixture, a nonelectric blasting cap, or what have you. 

Like erythritol tetranitrate, mannitol hexanitrate (Figure 3.27) is prepared by dissolving mannitol in nitric acid and then precipitation following the addition of concentrated sulfuric acid. It is quite impact sensitive, about twice as sensitive as erythritol tetranitrate and is used as the primary explosive in some modem nonelectric blasting caps instead of lead azide. 

These devices are usually detonators. The input end of the detonator has a charge of lead azide or other primary explosive that detonates instantly upon exposure to sparks, hot particles, or flame and a secondary explosive as an output charge. The common nonelectric blasting cap is probably the detonator produced in highest volume (Figure 23.1). 

Blasting Cap Crimped to Fuse Line Figure 23.1. Commercial nonelectric blasting cap. 

By 1867, Alfred Nobel was on the market with a nonelectric blasting cap filled with mercury fulminate, for use with his new dynamite a replacement for black powder. The fulminate-filled cap became a spark actuated or high-tension blasting cap under the development of American inventor, H. Julius Smith in 1868 (Figure 24.7). 

NOTE Electric and nonelectric blasting caps can be used with various bursters or igniters. 

Aiiscmble an M3 pall-release firing device and detonator, length of detonating cord, priming adapter, and nonelectric blasting cap. 

Screiv priming adapter and nonelectric blasting cap in threaded cap w el). 

Assemble two 2-block explosive charges, nonelectric blasting caps, priming adapiers, and length of detonatingcord. 

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