Television monitor
Patent 4484220 Issued on November 20, 1984. Estimated Expiration Date: 
November 20, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 20, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2855993 3159792 3833779 Combination dimmer and timer switch mechanism Load shedding timer for a power management system Electronic timer Television monitor and control Two terminal timed electric switch providing zero off-state current flow therethrough Television viewing control device Patent #: 4348696 InventorAssigneeApplicationNo. 06/306862 filed on 09/29/1981US Classes:348/730, Power supply968/976Acting only at one preselected time or during one adjustable time interval [G04G 15/00B]ExaminersPrimary: Martin, John C.International ClassesG04G 15/00 (20060101)H04N 5/63 (20060101) AbstractA monitor for restricting the operating time of electronic apparatus, such as a television set, is formed of an outer case of sufficiently small size to set atop a television set. The case includes on its outer surface a display of the time remaining of the predetermined operating time. The case also includes a chamber for enclosing time setting controls, the chamber having a locking cover for securing the controls from tampering by children. A slot in a wall of the chamber permits passing of a power cord of a television into the chamber while preventing the egress of the plug of the cord upon a locking of the cover to the chamber. A timer and power sensor within the case to measure the amount of time that power flows into the television, such power flow being an indication of operating time. A relay within the case switches off the power upon detection of a timing signal indicating conclusion of the predetermined operating time. | |
