Switch cover plate providing automatic emergency lighting
February 27, 2018. 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 2863038 3739226 Power failure light and circuit therefor Dual light source Illuminated light switch plate with LED and oscillator circuit Plug-in emergency light fixture Emergency lighting system Outdoor lighting controls Emergency lighting device Emergency safety light Patent #: 5473517 InventorApplicationNo. 032371 filed on 02/27/1998US Classes:362/95, WITH SWITCH PLATE OR SOCKET307/66, Storage battery or accumulator315/86, AUTOMATIC SUBSTITUTION OF THE POWER SUPPLY362/20, AUTOMATIC SUBSTITUTION OF POWER SUPPLY OR LIGHT SOURCE362/85, WITH CONTROL CONSOLE362/234, CombinedD13/137.2, Outlet adapter or plug tap (i.e., increases the number of outlet receptacles)D13/156Cap, cover or bootExaminersPrimary: Cariaso, AlanAttorney, Agent or FirmInternational ClassesF21V 023/04H05B 037/04 AbstractA wall mounted cover plate conceals an electrical circuit capable of sensing the field provided by a covered switch or electrical socket circuit. When power is lost at the wall circuit the electrical circuit senses the loss of power and activates one or more LEDs to provide emergency illumination. The electrical circuit is self contained and does not require stand-by energy so that the batteries are long lasting.Field of SearchAUTOMATIC SUBSTITUTION OF POWER SUPPLY OR LIGHT SOURCEWITH CONTROL CONSOLE WITH SWITCH PLATE OR SOCKET Condition responsive POSITION OR CONDITION RESPONSIVE SWITCH Combined Electromagnetic actuator for indicator matrix Storage battery or accumulator SPECIAL APPLICATION AUTOMATIC SUBSTITUTION OF THE POWER SUPPLY With load device or electrode substitution Having additional indicating means Light visible through housing | |
