Power cutting device for terminal units of CATV system
Patent 4439784 Issued on March 27, 1984. Estimated Expiration Date: 
March 27, 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.
March 27, 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 3761914 Method of and apparatus for establishing emergency communications in a two-way cable television system Remote disconnect-reconnect tap for cable television systems Control signal apparatus for CATV system Powersaving room security system Patent #: 4367455 InventorsApplicationNo. 06/191206 filed on 09/26/1980US Classes:725/25, ACCESS CONTROL OR BLOCKING340/825.24, Of audio system340/825.52, Addressing348/730, Power supply725/1, BILLING IN VIDEO DISTRIBUTION SYSTEM725/104, Pay-per-view725/34, Specific to individual user or household725/38, To facilitate tuning or selection of video signal725/78, Multiunit or multiroom structure (e.g., home, hospital, hotel, office building, school, etc.)725/83Having additional amenity (e.g., access to outside network, room service, etc.)ExaminersPrimary: Martin, John C.Assistant: Coles, Edward L. Attorney, Agent or FirmInternational ClassesH04N 7/16 (20060101)H04N 7/173 (20060101) Foreign Application Priority Data1979-09-26 JPAbstractIn a CATV system, power supplies of television sets associated with all terminal units are cut in response to an instruction contained in a down-data signal supplied by a central facility of the system. It is possible to cut the power supplies of the television sets, selectively and periodically, by incorporating address informations in the down-data signal. | |
