Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1988-03-23
1989-08-01
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
109 33, 109 37, 340636, 361172, E05B 4506, H01H 4700
Patent
active
048536768
ABSTRACT:
A security device for credit cards, charge cards, cash cards and the like has a base, an integrally molded top partially extending along the length of the base and a lid pivotally secured to one end of the base. A key pad is recessed into the top. The lid has an electrically operated latch operated by the key pad. A cartridge for the cards is formed of cardboard bent into a serpentine format to provide an upper compartment and a lower compartment, each compartment being suitable for holding up to four cards each. The internal surfaces of the cartridge are coated with a pyrotechnic material and a heating coil is connected to the cartridge. An authorized user of the device has a personal code which when inputted via the key pad opens the lid. Incorrect input of the code causes a piezoelectric bleeper to sound. Two incorrect input sequences are permitted but on the third incorrect sequence the coil causes the pyrotechnic solution on the cartridge to heat up and destroy the cards within the device. A water tamper device is provided which will also cause the cartridge to destroy the cards if the device is immersed in water. A conductive inlay is provided around the inside of the device so that if the inway is open circuited by an unauthorized attempt at entry into the device by, for example, drilling or sawing, the cartridge will again destroy the cards held within the device.
REFERENCES:
patent: 3349729 (1967-10-01), Olivier
patent: 4105156 (1978-08-01), Dethloff
patent: 4152988 (1979-05-01), Haas et al.
patent: 4236463 (1980-12-01), Westcott
patent: 4352097 (1982-09-01), Hamann
patent: 4573043 (1986-02-01), Heuker of Hoek et al.
patent: 4640724 (1987-02-01), Carter et al.
patent: 4712489 (1987-12-01), Levavasseur
patent: 4725823 (1988-02-01), Persson
Cardgard Ltd.
Mullen Jr. Thomas J.
Swann III Glen R.
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