Electrically operated door lock

Details Electrically operated door lock Electrically operated door lock

1977-06-16

1978-09-05

Bonck, Rodney H.

Closure fasteners

Bolts

Sliding

292DIG66, 292DIG69, 337107, E05B 5100

Patent

active

041114744

ABSTRACT:
An electrically operated door lock has a bolt movable into locking and unlocking positions; a generally cylindrical, positive temperature coefficient resistor; and a bimetal strip formed of a generally circular, open collar continuing in two spaced legs extending away from the resistor. The collar surrounds the resistor along its generally cylindrical surface. One of the two spaced legs constitutes a bolt-actuating terminus connected, directly or indirectly, with the bolt for moving the bolt upon deformation of the bimetal strip resulting from temperature changes caused by the resistor.

REFERENCES:
patent: 1876894 (1932-09-01), Fitzgerald
patent: 2520906 (1950-09-01), Cade
patent: 2598067 (1952-05-01), O'Brien
patent: 2910317 (1959-10-01), Conlee
patent: 3275832 (1966-09-01), Curtin
patent: 3643479 (1972-02-01), Solow
patent: 3870983 (1975-03-01), Kato et al.
patent: 4032180 (1977-06-01), Pohl
patent: 4037316 (1977-07-01), Stoll

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