Door lock

Closure fasteners – Operators with knobs or handles

Patent

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Details

E05C 904

Patent

active

043044301

ABSTRACT:
Lock and latch for a large door, particularly an upwardly opening type, including a housing with an elongated bolt slidably arranged therethrough. A manually operable crank is pivotally mounted within said housing and related to said bolt for moving same lineally upon pivotal movement of said crank. Lineally acting biasing means is operatively positioned between said bolt and said housing for continuously urging said bolt in a locking direction. A latch is pivotally mounted in said housing for movement into and out of a position to engage and releasably hold said bolt in its locked position. Second biasing means operatively positioned between said latch and said housing urges said latch toward said position. The latch and bolt are arranged so that the bolt can be released from its locked position with a minimum of force applied to said latch.

REFERENCES:
patent: 5557 (1848-05-01), Reynolds
patent: 1302063 (1919-04-01), Malone
patent: 2459571 (1949-01-01), Mihalek et al.
patent: 2475478 (1949-07-01), Clair
patent: 2828991 (1958-04-01), Stilger
patent: 3163033 (1964-12-01), Boyles
patent: 3306086 (1967-02-01), Hallgren
patent: 3958820 (1976-05-01), Teeple

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