Re-enforcer plate with different patterns of threaded holes for

Locks – Parts – attachments – accessories and adjuncts – For key-operated mechanism

Patent

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Details

70452, E05B 908, E05B 1502

Patent

active

050294601

ABSTRACT:
A guard for a door lock and cylinder is provided and consists of a face plate to cover and protect the cylinder while allowing a key to be inserted within the cylinder to operate the lock. The face plate prevents the lock from being separated from the door and is designed to receive bolts from typically four basic kinds of door locks so as to be a universal type of protector for the four locks.

REFERENCES:
patent: 504292 (1893-08-01), Badoni
patent: 1518996 (1924-12-01), Maunder
patent: 3550411 (1970-12-01), Neary et al.
patent: 3645045 (1972-02-01), Gervis et al.
patent: 4688409 (1987-08-01), Oliver et al.
patent: 4708007 (1987-11-01), Stoia
patent: 4732023 (1988-03-01), Shen
patent: 4751834 (1988-06-01), Beck

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