Electronic key

Details Electronic key Electronic key

1982-01-11

1984-03-13

Rubinson, G. Z.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235492, 235487, 361172, H04Q 300

Patent

active

044369930

ABSTRACT:
An improved electronic key for use in combination with an electrical receptacle adapted to receive the key wherein switch contacts on the key are designed for making electrical contact with corresponding receptacle contacts when the key is turned in the receptacle to an "on" position only after the other key contacts make electrical contact with the corresponding receptacle contacts. Conversely, the switch contacts are the first to break electrical contact when the key is turned past the "on" position in either direction.

REFERENCES:
patent: 2057532 (1936-10-01), MacDonald
patent: 3222534 (1965-12-01), Scott
patent: 3644745 (1972-02-01), Bell
patent: 3686659 (1972-08-01), Bostrom
patent: 3754214 (1973-08-01), Matsumoto et al.
patent: 3782148 (1974-01-01), Goldman
patent: 3848229 (1974-11-01), Perron et al.
patent: 3859634 (1975-01-01), Perron et al.
patent: 4050063 (1977-09-01), Schull
patent: 4225758 (1980-09-01), Konou et al.
"Electronics", 8/8/74.

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