Automatic resetting timer

Claim 2

In an oven having separate cooking and heat cleaning modes of operation: a. a door latch operated switch means, b. a timer motor energized by moving said door latch operated switch means to a latched position. c. said timer motor drivingly rotating a cam means, d. said cam means engageable with another switch means having a switch blade contactable by said cam means and a pair of alternately engageable contacts, one of said contacts being normally engaged by said switch blade and the other of said contact being normally open relative to said switch blade, e. a heating means for said oven for operating said oven in heat cleaning mode, f. said cam means when engaging said another switch means moving said switch blade against said normally open contact, g. said door latch operated switch means also having an unlatched position, h. when said latch operated switch means is moved to said unlatched position and said switch blade has been moved by said cam means to a closed position with said normally open contact, said timer motor is actuated to move said cam means out of engagement with said switch blade, i. whereby said oven is again placed in condition for the initiation of another heat cleaning mode.

Claim 3

In an oven having a door adapted to be latched during a cleaning mode of operation; a. circuit means including a latch operated switch means having a first position for initiating said cleaning mode of operation and a second position preventing said cleaning mode of operation, b. timing means in said circuit means for terminating said cleaning mode by operation of timing means operated switch means from a first to a second position, c. said timing means operated switch means in said second position completing a portion of said circuit means for subsequent energization of said timing means by operation of said latch operated switch means to a second position, d. said latch operated switch means and said timing means operated switch means being connected in said circuit means in a two-way arrangement so that said timing means is connected for energization only when both said switch means are either in said first positions or in said second positions whereby operation of said latch operated switch means to said second position after a cleaning mode of operation results in energization of said timing means until said timing means operated switch means is operated back to said first position.

Claim 4

In an oven having a door adapted to be latched during a cleaning mode of operation; a. circuit means including a latch operated switch means having a first position for initiating said cleaning mode of operation and a second position preventing said cleaning mode of operation, b. timing means in said circuit means for terminating said cleaning mode by operation of timing means operated switch means from a first to a second position, c. said timing means operated switch means in said second position completing a portion of said circuit means for subsequent energization of said timing means by operation of said latch operated switch means to a second position, d. said latch operated switch means and said timing means operated switch means being connected in said circuit means in a two-way arrangement so that said timing means is connected for energization only when both said switch means are either in said first positions or in said second positions whereby operation of said latch operated switch means to said second position after a cleaning mode of operation results in energization of said timing means until said timing means operated switch means is operated back to said first position.

Claim 5

A control arrangement for a self-cleaning oven having an oven cavity wiTh heating means therein, and an oven door, comprising: timer means for controlling the period of a cleaning cycle; a circuit for energizing said timer means; timer operated switch means in said energizing circuit having a first and a second position for effecting a cleaning cycle and a timer resetting cycle, respectively; latch operated switch means in said energizing circuit having a first and a second position corresponding to said door being latched and unlatched, respectively; both said switch means being connected in a two-way arrangement in said energizing circuit so that said timer means is energizable only when both of said switch means are in either said first or said second positions so that upon operation of said timer operated switch means by said timer means to said second position at the end of a cleaning cycle, operation of said timer means is terminated until said latch operated switch means is operated to said second position whereupon said timer means is energized in a resetting cycle until operation of said timing means is again terminated by operation of said timer operated switch means back to said first position.

Claim 6

A control arrangement for a self-cleaning oven having an oven cavity wiTh heating means therein, and an oven door, comprising: timer means for controlling the period of a cleaning cycle; a circuit for energizing said timer means; timer operated switch means in said energizing circuit having a first and a second position for effecting a cleaning cycle and a timer resetting cycle, respectively; latch operated switch means in said energizing circuit having a first and a second position corresponding to said door being latched and unlatched, respectively; both said switch means being connected in a two-way arrangement in said energizing circuit so that said timer means is energizable only when both of said switch means are in either said first or said second positions so that upon operation of said timer operated switch means by said timer means to said second position at the end of a cleaning cycle, operation of said timer means is terminated until said latch operated switch means is operated to said second position whereupon said timer means is energized in a resetting cycle until operation of said timing means is again terminated by operation of said timer operated switch means back to said first position.

Claim 7

A control arrangement according to claim 3 including: a heating means control circuit for effecting energization of said heating means, said heating means control circuit including said timer operated switch means and said latch operating switch means, both of said switch means being required to be in said first positions for energization of said heating means to be effected.