Self-cleaning oven latch-lock-control arrangement

Claim 1

In a cooking oven of the pyrolytic self-cleaning type for carrying out both cooking operations and cleaning operations, including an oven cavity defined by an oven liner; heating means for said oven cavity; a door for said oven cavity; means for latching said door along its upper edge including a latching bolt movable into an aperture of a keeper plate; a bell crank pivotally mounted on said keeper plate, said crank including one arm adapted to be moved sideways by said latching bolt to turn said crank, and another arm movable forwardly upon turning of said crank; a locking and control mechanism box located generally at the upper rear of said oven liner, said locking mechanism including a draw bar movable forwardly to control switch means to permit initiation of self-cleaning cycle, said draw bar including a series of holes spaced apart in a front to rear direction; said box including safety switch means operable to open in response to excessive oven temperatures; said draw bar carrying lever means for operating said safety switch means from one position in which said safety switch means operates to an open position in response to an oven temperature in excess of safe cooking temperatures, to a second position in which said safety switch means operates to an open position in response to oven temperatures in excess of safe cleaning temperatures; a linking bar connected at its forward end to said another arm of said crank, and having at its rear connecting means for engagement with said draw bar at one of said holes therein; a stabilizer bar having its front end attached at the pivotal axis of said bell crank, and having a series of front to rear attachment locations, corresponding in front to rear spacing to the spacing of said holes of said draw bar; and means for making a connection between a selected one of said stabilizer bar attachment locations with a fixed location on said box, and for making an attachment between said rear connecting means of said linking bar with a corresponding hole of said rear draw bar, the correspondence between the stabilizer bar attachment locations and said rear draw bar holes being successively forward stabilizer bar attachment locations corresponding to successively rearward draw bar holes.