Safety lock for the doors of electrical applicances

Details Safety lock for the doors of electrical applicances Safety lock for the doors of electrical applicances

1990-04-11

1991-11-05

Nicholson, Eric K.

Closure fasteners

Bolts

Multiple

292DIG69, 292 45, 200 6164, E05B 1502

Patent

active

050626680

ABSTRACT:
A safety door lock for a door of an electrical appliance includes a longitudinally displaceable detent bolt mounted in a door of an appliance, a door lock housing having an opening receiving the free end of the detent bolt, and a longitudinally displaceable switching slide that having a stub end adapted to engage with the free end of the detent bolt. After engagement, further longitudinal displacement of the detent bolt causes movement of the switching slide to its "on" position. A biasing mechanism urges the switching slide toward an "off" position in which a detent mechanism latches the detent bolt in a locking position upon insertion of the detent bolt in the door lock housing. The detent mechanism includes a releasable locking latch which clamps the switching slide in the "on" position. The locking latch has a first portion which, in the "on" position of the switching slide, engages the detent bolt to retain the detent bolt within the door lock housing, and has a second portion which, in the "off" position of the switching slide, engages the switching slide to retain the switching slide against longitudinal movement toward the "on" position.

REFERENCES:
patent: 3133168 (1964-05-01), Jacobson
patent: 3617957 (1971-11-01), Brighenti
patent: 3750851 (1969-06-01), Perl
patent: 3892933 (1975-07-01), Rocchitelli
patent: 3924085 (1975-12-01), Stone
patent: 4032180 (1977-06-01), Pohl
patent: 4314217 (1982-02-01), Krasser
patent: 4620735 (1986-11-01), Heydner
patent: 4703147 (1987-10-01), Happ et al.
patent: 4963706 (1990-10-01), Mohtasham
patent: 4988132 (1991-01-01), Rocchitelli

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