Security lock for sliding doors

Details Security lock for sliding doors Security lock for sliding doors

1983-06-07

1985-08-13

Smith, Gary L.

Locks

Special application

For closures

70136, 70339, E05B 6314

Patent

active

045341915

ABSTRACT:
A security lock for use on sliding doors or gates has a pair of hook bolts which are thrown apart or withdrawn together according to the position of a head on a reciprocable slide. Each bolt has a recess mated to the head with front and rear driving surfaces, this geometry being related to the pivot points of the bolts such that the head drives the bolts positively between their thrown and withdrawn positions with no lost motion and without the need for spring-biasing of the bolts. The slide is deadlocked by a pack of levers, to which a second lever pack is linked, two lever packs being provided so that non-palindromic key-stepping can be employed. If required, the slide can be double-thrown by successive use of two different correct keys, for which different key-hole positions and are provided to cooperate with the lever packs.

REFERENCES:
patent: 512139 (1894-02-01), Willard
patent: 600584 (1898-03-01), Kaye
patent: 913459 (1909-02-01), Bily
patent: 1067187 (1913-07-01), Mueller
patent: 1568663 (1926-01-01), Fuber
patent: 2720774 (1955-10-01), Gehrie
patent: 4239268 (1980-12-01), Rider
patent: 4332153 (1982-06-01), Miles

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