Door-lock mounting plate

Details Door-lock mounting plate Door-lock mounting plate

1987-09-04

1988-12-13

Smith, Gary L.

Locks

Parts, attachments, accessories and adjuncts

For key-operated mechanism

70451, 70462, 2923363, 292357, 292DIG30, E05B 1502

Patent

active

047901624

ABSTRACT:
This mounting and protection plate for door lock handles is applicable notably as an ornamental fitting to the doors of private houses. The plate (5) comprises a back recess (9) in which a spiral return spring (10) is disposed. The inner turn of the spring has a square configuration engaged by the square-sectioned handle-bar of the door lock which interconnects the handle and the lock mechanism, and the outer turn of the spring is anchored to the plate by engaging a groove formed therein, the spiral spring constantly urging the handle to its normal, inoperative position, independently of the lock spring.

REFERENCES:
patent: 1942525 (1934-01-01), Weller
patent: 2815655 (1957-12-01), Boer
patent: 3211486 (1965-10-01), Crandell
patent: 4236396 (1980-12-01), Surko et al.
patent: 4569547 (1986-02-01), Fayerman et al.
patent: 4604879 (1986-08-01), Neary et al.
patent: 4640112 (1987-02-01), Kambic
patent: 4696174 (1987-09-01), Marks

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