Method and apparatus for programming a spare key into a security

Details Method and apparatus for programming a spare key into a security Method and apparatus for programming a spare key into a security

1992-12-21

1995-05-16

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082534, 340426, 70278, E05B 5300

Patent

active

054164710

ABSTRACT:
A method for programming a spare key containing an electronic coded security code into the memory of a security system whereby a known key is inserted into the lock cylinder and the security device is triggered to read its encoded security code. If within a period of time an unknown key is inserted into the lock cylinder, the encoded security code of the unknown key is then inserted into the system memory. The new key security code becomes an additional acceptable security code to open the lock in response to receiving the first (authorized) security code.

REFERENCES:
patent: 4209782 (1980-06-01), Donath
patent: 4738334 (1988-04-01), Weishaupt
patent: 4791280 (1988-12-01), O'Connell et al.
patent: 4980680 (1990-12-01), Knoll et al.
patent: 4990906 (1991-02-01), Kell et al.
PT Electrotechniek, Elecktronica, vol. 46, No. 3, 1 Mar. 1991, Rijswijk, NL, pp. 4-5 `elektronisch slot verlaat eeuwenoud principe`

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