Electronic security system for externally powered devices

Details Electronic security system for externally powered devices Electronic security system for externally powered devices

1984-11-08

1986-08-05

Shaw, Gareth D.

Boots, shoes, and leggings

34082531, G08B 1306, G06F 100, B60R 2500

Patent

active

046047085

ABSTRACT:
An electronic security system for a device requiring an external power source is disclosed. The security system includes a microcomputer which executes a power-on routine stored in memory whenever the microcomputer is initially coupled to a power source. The user must enter a primary security code which is compared to a predetermined code, and if the codes match, the microcomputer signals a relay to provide power to the device, thereby enabling it. Once enabled, the user need not reenter the security code as long as the external source of power to the device remains uninterrupted. A secondary security code may be entered if the primary code has been forgotten or misplaced. Upon entry of the secondary code, the microcomputer displays an encrypted version of the primary security code. If an incorrect code is entered by the user, the microprocessor executes an alarm routine which may include visual and audible warnings.

REFERENCES:
patent: 4103289 (1978-07-01), Kolber
patent: 4179733 (1979-12-01), Launzel et al.
patent: 4288659 (1981-09-01), Atalla
patent: 4310720 (1982-01-01), Check, Jr.
patent: 4333074 (1982-06-01), Sutherland et al.
patent: 4333090 (1982-06-01), Hirsch
patent: 4366466 (1982-12-01), Lutz
patent: 4447890 (1984-05-01), Duwiel et al.
Byte, Word Protection for Your Computer, by R. Jordan Kreindler, Mar. 1979, pp. 194-195.

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