Door lock

Details Door lock Door lock

1985-08-12

1987-03-17

Holko, Thomas J.

Locks

Special application

For closures

70413, 70276, 70149, 292DIG27, E05B 5514

Patent

active

046497250

ABSTRACT:
A door lock in which the lock bolt is not retracted by direct action of the handles but is instead retracted by slide members acted upon by the handles, the slide members having means for engaging a further slide which carries the bolt. One of the engagement means includes an electromagnet and an engagement member. The engagement member engages the bolt carrying slide only when the electromagnet is energized, which occurs when an appropriate key has been inserted into the lock and verified.

REFERENCES:
patent: 305684 (1884-09-01), Ewing
patent: 504462 (1893-09-01), Tinkham
patent: 632959 (1899-09-01), Clement
patent: 1043750 (1912-11-01), Arens
patent: 1234519 (1917-07-01), Williams
patent: 1751184 (1930-03-01), Wodarra
patent: 2072317 (1937-03-01), Simpson
patent: 2075948 (1937-04-01), Kuszmaul
patent: 2162704 (1939-06-01), Dall
patent: 2459029 (1949-01-01), Ingres et al.
patent: 2644705 (1953-07-01), Hagstrom
patent: 3807203 (1974-04-01), Larsen
patent: 3919869 (1975-11-01), Fromm
patent: 4114410 (1978-09-01), Astier
patent: 4255953 (1981-03-01), Dietrich et al.

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