Cylindrical lock structure

Details Cylindrical lock structure Cylindrical lock structure

1990-07-13

1991-10-29

Smith, Gary L.

Locks

Operating mechanism

Key

70421, E05B 1514, E05B 6300

Patent

active

050604945

ABSTRACT:
A flat key pick resistant cylindrical lock structure which comprises a plug, a sleeve and a housing. The housing is bored off center to receive the sleeve and thus make room for biased split pin tumblers embodying false segments and further, limited misleading internal rotational movement occurs when an attempt is made to pick the lock. Also two shear lines between the plug and sleeve and between the sleeve and housing must be cleared before an unlocking of the lock can be accomplished.

REFERENCES:
patent: 2111098 (1938-03-01), Segal
patent: 2145085 (1939-01-01), Heyer
patent: 2222027 (1940-11-01), Golden et al.
patent: 3197985 (1965-08-01), Cosio
patent: 3260082 (1966-07-01), Bodek et al.
patent: 3783660 (1974-01-01), Gill
patent: 3885409 (1975-05-01), Genakis
patent: 4068509 (1978-01-01), Genakis
patent: 4222252 (1980-09-01), Tietz

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