| 摘要 |
An emergency destruct system for destroying the information on microfiches attached to cards stored in security containers like the drawers of a combination lock safe. The system includes a storage tray for the cards, a tank holding fluid which can dissolve the emulsion on the microfiches, a release port assembly on the bottom of the tank and means for actuating the assembly to open the port and release the fluid contained therein.The tray contains styrofoam spacers which form compartments to store the microfiche cards, is open at the sides and is placed in the bottom of the drawer.The tank is held above the tray by a retaining member which is affixed to the upper drawer separator.The back of the drawer is cut off and a rubber pad is secured to the back of the safe to form a back for the drawer when it is in the fully closed position.The release port assembly includes a prestressed glass disc, some gaskets, a spring member and a retaining member, the glass disc keeping the fluid in the tank from dropping out on the tray.When ready to destroy the microfiche a piston is made to strike the edge of the prestressed glass, shattering it and allowing the spring to propel the glass into the tray, thereby opening the release port.The piston is part of a piston motor which has a resistance wire surrounded by an explosive charge. An electrical impulse generator is squeezed to send current into the resistance wire. The current heats the wire and this explodes the charge causing the piston to strike the glass.Preferably, the tray fits into a liner which fits into the drawer, the upper space of the liner accommodating the tank. The rear of the liner is excised so that the rear of the liner does not contact the tank when the drawer is pulled out.
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