Bimetal lock arrangement for a self-cleaning oven latch

Details Bimetal lock arrangement for a self-cleaning oven latch Bimetal lock arrangement for a self-cleaning oven latch

1988-12-21

1989-09-05

Dority, Jr., Carroll B.

Stoves and furnaces

Stove doors and windows

Latches

292DIG66, 292DIG69, F23M 700

Patent

active

048628700

ABSTRACT:
A self-cleaning over door latching mechanism is provided with a locking arrangement responsive to the oven cavity temperature, which includes a locking pin moved by a snap action bimetal member mounted in thermal communication with an oven cavity wall. The bimetal member moves the locking pin to a locking position when the temperature sensed by the bimetal rises above the locking temperature. In its locked position the locking pin prevents the opening of the latch until the temperature in the oven cavity falls below the locking temperature. In its locked position the locking pin also actuates a lock switch electrically connected in parallel with a thermal limit switch. The thermal limit switch provides over temperature protection for the cavity when operating in the normal cooking modes. When actuated, the lock switch shunts the limit switch thereby enabling the temperature in the cavity to rise to the self-clean range. If the locking pin fails to move to its locked position, the limit switch limits the temperature in the cavity to a level at which the door may be safely opened.

REFERENCES:
patent: 3189375 (1965-06-01), Getman
patent: 3416515 (1968-12-01), Mertler
patent: 3438666 (1969-04-01), Erickson
patent: 3540767 (1970-11-01), Siegel
patent: 3625197 (1971-12-01), Pirker et al.
patent: 3638638 (1972-02-01), Phifer
patent: 3776216 (1973-12-01), Pirker et al.
patent: 3831580 (1974-08-01), McLean
patent: 4133337 (1979-01-01), Shea
patent: 4351288 (1982-09-01), Gasloli

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