27 lines
1.6 KiB
Plaintext
27 lines
1.6 KiB
Plaintext
Release Of Pressure Detonators
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The next type of detonating device I will discuss is called a
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releas-of-pressure mechanism. This device employs exactly the same principles
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as the pressure-trigger device, except in reverse. The movement of the
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pressure plate, rather than down, is now up. This can be used effectively when
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a weight is placed on the pressure plate. Then when it is removed, the
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explosives will be ignited. To construct, use a heavy-duty spring beneath the
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first metal plate. Connect a wire from the blasting cap to the first metal
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plate. The second wire is then stretched from the bottom of battery "A", to
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the second metal plate. The third wire is run from the electrical blasting cap
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to the top of battery "B". When this is accomplished, the booby trap is fully
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cocked. When the weight on the pressure plate is remove, the spring will will
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force the second metal plate against the first, thus completing the electrical
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circuit and exploding the device.
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In a tension-release booby trap, when the tension, resulting from a
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wire pulling on a pliable metal strip, is released, the metal strip will snap
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back into another metal strip. Since the wires from the batteries and blasting
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cap are connected to either metal strip, when they touch, the circuit will be
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complete and it will detonate the explosive charge. This type of detonator is
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especially effective when attached to drawers, doors, or any movable object.
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