Powersaving room security system
Patent 4367455 Issued on January 4, 1983. Estimated Expiration Date: 
February 12, 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.
February 12, 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 3696383 3729710 Communications booth with automatic accounting for telephone and booth usage Appliance control Automatic control system for a building Apparatus for conserving energy in electrical appliances Patent #: 4223301 InventorApplicationNo. 06/233830 filed on 02/12/1981US Classes:340/310.11, REMOTE CONTROL OVER POWER LINE340/538, Combined with power line340/825.37Additional to other selective controlExaminersPrimary: Yusko, Donald J.International ClassesG08B 7/00 (20060101)G08B 7/06 (20060101) G08B 13/00 (20060101) AbstractA powersaving room security system including a switch connected to a door locking system which generates a lock signal congruous to proper locking of the door. A central control unit produces control signals which can be transmitted through the room AC lines. The control signal corresponds to the existence of the lock signal. Module units are respectively connected to each of the various electrical wall switches and receptacles in the room and respond to the control signals for correspondingly controlling the respective receptacles and wall switches. In this way, lights and appliances in the room can only be permanently energized from the room AC lines when the door of the room is properly locked. At the same time, the system provides an energy saving system by turning off all appliances and lights which the guests may have left on without leaving the room. | |
