Security chain lock

Details Security chain lock Security chain lock

1975-01-07

1976-03-16

Moore, Richard E.

Closure fasteners

Extension link

Chain

E05C 1736

Patent

active

039442683

ABSTRACT:
A security stop lock for a door chain. The security stop lock is in the form of a joined pair of discs together with a thumb screw. The discs fit about the slot in the locking plate in a door chain mechanism and the thumb screw fastens the discs into a threaded hole in the member to which the slotted locking plate is fitted so as to prevent removal of the door chain tab from the slot of the locking plate.

REFERENCES:
patent: 1876640 (1932-09-01), Dobson
patent: 3155410 (1964-11-01), North et al.

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