초록 ▼

A timer assembly automatically turns off an appliance to which it is connected within a predetermined time period after the appliance has been automatically, or manually, turned on. The timer assembly includes a three-position selector mechanism with rotating cams that activate a plunger to control

A timer assembly automatically turns off an appliance to which it is connected within a predetermined time period after the appliance has been automatically, or manually, turned on. The timer assembly includes a three-position selector mechanism with rotating cams that activate a plunger to control the operation of an electrical switch which, in turn, activates or deactivates the appliance. Rotation of the selector mechanism is controlled by a clockwork assembly which rotates the selector into a position to turn on the appliance at a predetermined set-time. When the selector is rotated into its “on”position, a gear connected to the selector engages a drive gear which is, in turn, connected to the clockwork assembly. The drive gear continues the rotation of the selector so that after a predetermined time interval, the appliance is turned off. The drive gear is connected to the clockwork assembly by a friction clutch which allows the selector to be manually set to its “on”position without affecting the clockwork assembly.

대표청구항 ▼

In a timer assembly for control of an electrical device, said timer assembly including a motor, a clockwork gear train rotated by said motor, manually-operable means for determining a set-time, an electrical switch controlling said device, and actuator means responsive to the rotation of said gear t

In a timer assembly for control of an electrical device, said timer assembly including a motor, a clockwork gear train rotated by said motor, manually-operable means for determining a set-time, an electrical switch controlling said device, and actuator means responsive to the rotation of said gear train and cooperating with said manual set-time neans for actuating said switch at said set-time, the improvement comprising: said actuator means including means responsive to the rotation of said gear train for deactuating said switch within a predetermined time interval, means responsive to the actuation of said switch for engaging said deactuating means with said gear train, and means connected to said actuator means for maintaining said switch deactuated at the end of said predetermined time interval.