Lock with removable plug

Details Lock with removable plug Lock with removable plug

1984-12-24

1986-12-23

Wolfe, Robert L.

Locks

Operating mechanism

Key

70337, E05B 2904

Patent

active

046304576

ABSTRACT:
A lock is disclosed having a lock barrel with an opening and a key plug rotatable within the opening. The plug is rotatable between first and second operative positions and a third position in which the plug can be withdrawn from the barrel. A tab on the plug abuts a barrel shoulder to hold the plug in the barrel except when the plug is in the third position, where the tab is aligned with an axial slot to permit axial withdrawal of the plug from the barrel. At least one tumbler is adapted to lock the plug against turning, and another tumbler is adapted to prevent the plug from turning to the third position and to allow rotation between the first and second positions. One key operates the one tumbler to permit rotation between operative positions and a second key operates the other tumbler to permit axial withdrawal of the plug from the barrel.

REFERENCES:
patent: 2061456 (1936-11-01), Falk
patent: 3799555 (1968-09-01), Gray
patent: 4191037 (1980-03-01), Patriquin
patent: 4272975 (1981-06-01), Patriquin
patent: 4398405 (1983-08-01), Patriquin
patent: 4405843 (1983-09-01), Wolniak et al.
patent: 4427852 (1984-01-01), Wolniak et al.
Chicago Single Bitted Locks, (a Chicago Lock Company brochure) p. 40.

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