Timer control for television
AssigneePentalux Corporation
InventorsWilliam R. Maclay, William A. Hewett
Life of this patent
Estimating the term…
Abstract
A device for regulating the maximum time a television or the like can be operated, comprising a first counter (19) that can be manually set by use of a key (24A) to set a switch (24) with a predetermined time period. A second counter (20) deducts the actual operating time of the television from the first counter. The device interrupts the power circuit to the television when the predetermined time period expires. The switch can be set to allow operation of the television without deducting time from the first counter.
Claims9
A device for measuring and regulating the time an electrical appliance receiving power through a first power cord having a first plug thereon is used, comprising:
- a first counter including means to set a time period on said first counter indicating the total time the electrical appliance can be used;
- means to sense the flow of electrical current in the first power cord of the electrical appliance;
- a second counter operable in response to the sensing means indicating said electrical appliance is receiving a flow of electrical current to deduct the time the appliance receives current from said time period of the first counter;
- an indicator visually indicating the time period on said first counter;
- and
- means operable to prevent said second counter from deducting time from said first counter time duration.
Dependencies are inferred from the claim text.