Card-operated lock

Details Card-operated lock Card-operated lock

1991-09-27

1992-09-15

Luebke, Renee S.

Locks

Portable

Padlocks

70387, 70405, 70409, E05B 6722, E05B 3504

Patent

active

051467704

ABSTRACT:
A card-operated lock using a card with embossed letters matching with corresponding letters on letter profiles in the lock for lowering of side levers on the letter profiles and consequently disengaging the letter profiles from their retaining plates to open the lock. The lock is designed to prevent opening thereof without the designated card.

REFERENCES:
patent: 1458520 (1923-06-01), Castell
patent: 1462869 (1923-07-01), Primak
patent: 1540488 (1925-06-01), Mataloni
patent: 1719309 (1929-07-01), Radosevic
patent: 2985005 (1961-05-01), Kahn
patent: 3588397 (1971-06-01), Ellefson
patent: 4111018 (1978-09-01), Pilvet
patent: 4149394 (1979-04-01), Sornes
patent: 4838058 (1989-06-01), Matsumoto
patent: 4860562 (1989-08-01), Koren et al.
patent: 5024071 (1991-06-01), Shafirkin
patent: 5025647 (1991-06-01), Muus

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