Electricity: circuit makers and breakers – Retarded – Clock train
Patent
1986-07-23
1987-09-22
Scott, J. R.
Electricity: circuit makers and breakers
Retarded
Clock train
200 35R, 200 38A, 200 38F, 200 38FB, H01H 4300, H01H 708
Patent
active
046956832
ABSTRACT:
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.
REFERENCES:
patent: 3138674 (1964-06-01), Boyles
patent: 4242547 (1980-12-01), Hashimoto
patent: 4414439 (1983-11-01), Pomponio
patent: 4599499 (1986-07-01), Duve
Pomponio Edward V.
Wingler William C.
Scott J. R.
Telechron, Inc.
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