Class 315/162 - Diverse type load devices

Subclass of Class 315 - Electric lamp and discharge devices: systems
Definition: Systems wherein at least one of the load devices is of a
No. of patents: 4
Last issue date: 04/09/1996

Number	Title	Issue Date
5506476	Field emission cathode A field emission cathode includes first and second cathode layers having respective projections and disposed on the surface of a substrate. An insulating layer having an opening and disposed on the surface of the cathode layer surrounds the projections. A...	04/09/1996
4518896	Dual voltage lighting fixture A dual voltage lighting fixture for permiting the interchangeable use of light bulbs having substantially different operating voltages. The apparatus includes a housing to which is mounted a standard sized light bulb socket and a connector. A transformer ...	05/21/1985
4451762	Control circuit and system for providing emergency lighting A control circuit and system is disclosed for providing emergency lighting from a single source of electrical power which itself is capable of providing input power alternately in the form of a sinusoidal power signal and a square wave power signal during...	05/29/1984
4100460	One chip direct drive and keyboard sensing arrangement for light emitting diode and digitron displays A circuit having two modes of operation for driving either one of a light emitting diode or a gas discharge tube (digitron) display from a single semiconductor chip. Respective voltages are supplied to the chip to enable the circuit to selectively operate...	07/11/1978

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