Construction of cylinder lock

Details Construction of cylinder lock Construction of cylinder lock

1981-09-25

1984-01-10

Wolfe, Robert L.

Locks

Operating mechanism

Key

70417, E05B 6300

Patent

active

044246943

ABSTRACT:
A cylinder lock is provided with means for preventing a cylinder from being extracted to improve safety against breakage of lock. The preventing means comprises a mouth member which is fixed to the cylinder at an entrance of a keyhole but capable of being broken off from the cylinder and becoming rotatable with respect to the cylinder while being undetachable. Preferably the mouth member has a hardness greater than that of the cylinder.

REFERENCES:
patent: 4056955 (1977-11-01), Glass

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