Safety lock

Details Safety lock Safety lock

1977-07-22

1978-11-28

Holko, Thomas J.

Locks

Special application

For closures

70139, 292196, 292200, E05B 6510, E05C 310

Patent

active

041270169

ABSTRACT:
A safety lock comprises a lock housing, a pivotal bolt, bolt control means located in the housing to rotate the bolt from a locking to an unlocking position, key actuated means to operate the bolt control means and handle means adapted to operate the bolt control means in a manner such that the pivotal bolt rotates approximately 90.degree. from a locking position to an unlocking position by turning the handle means which is restricted to a turning movement of less than 180.degree.. The pivotal bolt extends outwardly from the housing when it is in a locking position. The key actuated means operates independently of the handle means and preferably rotates through an angle of at least 360.degree..

REFERENCES:
patent: 2053806 (1936-09-01), Van Note
patent: 2650121 (1953-08-01), Schlage
patent: 2736185 (1956-02-01), Collar
patent: 2854839 (1958-10-01), Eads
patent: 3009724 (1961-11-01), Hall
patent: 3103804 (1963-09-01), Wood et al.
patent: 3899906 (1975-08-01), Bradstock

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