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Browse by Category: Main > Electrical & Energy
Class Information
Number: 307/140
Name: Electrical transmission or interconnection systems > Switching systems > Switch actuation > Power circuit controlled
Description: Subject matter having means to control a power circuit.










Patents under this class:
1 2 3 4 5 6 7 8 9 10

Patent Number Title Of Patent Date Issued
5874789 Circuit for integrating a local switch and a remote-control switch Feb. 23, 1999
5874790 Method and apparatus for a plurality of modules to independently read a single sensor Feb. 23, 1999
5854520 Stove timer and automatic cut off system Dec. 29, 1998
5847655 Safety discharge circuit for high voltage electrical system and method Dec. 8, 1998
5831345 Priority relay circuit with timer Nov. 3, 1998
5828307 Hydrocarbon gas monitor desk Oct. 27, 1998
5821641 Secondary supply power referenced interlock circuit Oct. 13, 1998
5808423 Lighting control for reducing energy consumption Sep. 15, 1998
5796185 Circuit card present sense and protective power supply inhibit for airborne application of ATM switch unit Aug. 18, 1998
5789098 Method of detecting external voltage source for disablement of battery conservation mode in a portable communications device Aug. 4, 1998
5783875 Touch sensor circuit Jul. 21, 1998
5767594 Computer keyboard power saving method Jun. 16, 1998
5763959 Control cabinet for building automation systems Jun. 9, 1998
5763960 Power supply controlled operation sequencing method and apparatus Jun. 9, 1998
5763962 Semiconductor switch driving circuit Jun. 9, 1998
5757088 Remote control device especially for conveying, spraying and distributing machines for concrete and mortar May. 26, 1998
5753982 Apparatus for supplying power to a peripheral device from computer system May. 19, 1998
5739597 Adapter design for dual sourced power Apr. 14, 1998
5731664 Electrical switched load relocation apparatus Mar. 24, 1998
5708309 Power supply control circuit and computer game machine using such circuit Jan. 13, 1998
5694115 Remote control activated electric drip coffee maker Dec. 2, 1997
5689398 Redundant control relay circuits Nov. 18, 1997
5672917 Semiconductor power switch system Sep. 30, 1997
5670936 Power controller enclosure Sep. 23, 1997
5668538 Modular electricity meter arrangement having remotely controllable switch Sep. 16, 1997
5668419 Reconfigurable connector Sep. 16, 1997
5654595 Electrical current regulating device for a power tool Aug. 5, 1997
5650673 Timer device for a power source Jul. 22, 1997
5633540 Surge-resistant relay switching circuit May. 27, 1997
5616971 Power switching circuit Apr. 1, 1997
5614811 Power line control system Mar. 25, 1997
5610453 Pulsewidth modulation (PWM) frequency slider Mar. 11, 1997
5598039 Method and apparatus for sensing state of electric power flow through a master circuit and producing remote control of a slave circuit Jan. 28, 1997
5592032 Security power interrupt Jan. 7, 1997
5583386 Safety circuit in electrically operated devices Dec. 10, 1996
5528449 Arrangement for separating a control device from an AC mains supply Jun. 18, 1996
5527636 Green power supply for a small calculator Jun. 18, 1996
5524083 Decentralized, modular tripping arrangement Jun. 4, 1996
5512790 Triaxial double switch module Apr. 30, 1996
5508878 Electronic timer using zero power while off Apr. 16, 1996
5497142 Directional separator-coupler circuit for medium-frequency carrier currents on a low-voltage electrical line Mar. 5, 1996
5477113 Apparatus for applying a variable voltage to an electric load Dec. 19, 1995
5424587 Integrated electrical/communication system hardware Jun. 13, 1995
5404545 Interface isolation and selection circuit for a local area network Apr. 4, 1995
5397929 Integrated outlet for communications and electrical power Mar. 14, 1995
5397930 Programmable wall switch plug-in timer Mar. 14, 1995
5384491 Main switch feeding a controllable on/off sub-switch Jan. 24, 1995
5374856 Timer motor incremental drive Dec. 20, 1994
5309032 Wall switch timer May. 3, 1994
5293636 Module for insertion into a multi-module system having electronic keying for preventing power to improperly connected modules with improperly configured diode connections Mar. 8, 1994

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