Lock arrangement employing mechanically acting code card and key

Details Lock arrangement employing mechanically acting code card and key Lock arrangement employing mechanically acting code card and key

1993-05-07

1994-09-06

Cuomo, Peter M.

Locks

Operating mechanism

Key

70352, 70383, 70386, E05B 3510, E05B 2500

Patent

active

053437241

ABSTRACT:
In a locking apparatus that utilizes bores and blocking pins along with key cards and code cards to unlock the lock, a master card key is employed with holes in all of the master card bores and balls are used instead of blocking pins.

REFERENCES:
patent: 2176800 (1939-10-01), Moninger
patent: 3293893 (1966-12-01), Chesler
patent: 3599456 (1971-08-01), Bessim
patent: 4149394 (1979-04-01), Sornes
patent: 4452059 (1984-06-01), Sornes
patent: 4836002 (1989-06-01), Monahan
patent: 5025647 (1991-06-01), Muus
patent: 5181407 (1993-01-01), Wu

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