초록 ▼

A door interlock arrangement for an appliance such as a self-cleaning electric oven has an operating lever manually movable in a limited arc to move a door bolt into and out of door latching position and provide further motion to close the door very securely, and has a lock arranged in a novel coope

A door interlock arrangement for an appliance such as a self-cleaning electric oven has an operating lever manually movable in a limited arc to move a door bolt into and out of door latching position and provide further motion to close the door very securely, and has a lock arranged in a novel cooperative relationship with an electrical interlock unit to permit certain appliance operations only when the door is latched and to permit opening of the door after the end of those appliance operations only when a selected appliance zone has cooled to a safe temperature.

대표청구항 ▼

An interlock arrangement for an appliance door comprising a support, a bolt pivotally mounted on the support for movement between a latching position securing an appliance door closed and an unlatching position permitting opening of the door, a lever pivotally mounted on the support for manual movem

An interlock arrangement for an appliance door comprising a support, a bolt pivotally mounted on the support for movement between a latching position securing an appliance door closed and an unlatching position permitting opening of the door, a lever pivotally mounted on the support for manual movement between latching and unlatching positions thereof to move the bolt between corresponding positions, the lever having a cam and having a radial slot circumferentially disposed thereon for movement with the lever between said latching and unlatching positions of the lever, a lock pivotally mounted on the support for movement in a plane between latching and unlatching positions of the lock, the lock having a detent to be received in lever slot and having a follower to be engaged by the lever cam to pivot the lock from its unlatching position to its latching position to move the detent into the lever slot when the lever is moved to its latching position so that the detent locks the lever in its latching position when the lock is in its latching position, and an interlocking unit mounted on the support, the unit having a member normally disposed under the plane of lock movement normally permitting the lock to move between its latching and unlatching positions, having first movable and complementary electrical contacts engageable for operating an appliance, having an electrical resistance heater connectable in an appliance circuit to be selectively energized when appliance operation is to be initiated, and having means thermally responsive to the heater and to a temperature in a selected appliance zone to move the member into said plane only when the lock is in its latching position in the plane, to intercept and prevent movement of the lock in the plane from its latching position to its unlatching position, and to engage the first contacts to operate the appliance only when the lock is in its latching position, said means being thermally responsive to release the lock to move form its latching position to its unlatching position only after the heater is deenergized when appliance operation is discontinued and after the selected appliance zone is cooled so that the thermally responsive means has cooled to a predetermined reset temperature.