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Class Information
Number: 307/141.8
Name: Electrical transmission or interconnection systems > Switching systems > Switch actuation > With time delay or retardation means > Series connected switches
Description: Subject matter wherein the time delay is achieved by means of serially connected switches operated by a timer.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8471308 Process-variation tolerant series-connected NMOS and PMOS diodes, and standard cells, tags, and sensors containing the same Jun. 25, 2013
8446050 Solid-state alternating current (AC) switch May. 21, 2013
8035942 Safety switch device Oct. 11, 2011
7999668 Series interlock system with integrated ability to identify breached locations Aug. 16, 2011
7992321 Laundry dryer having three roller drum support system and reversing idler assembly Aug. 9, 2011
7911086 Switching circuit, signal output device and test apparatus Mar. 22, 2011
7760528 Method and apparatus for providing high speed, low EMI switching circuits Jul. 20, 2010
7498862 Switch for handling terminal voltages exceeding control voltage Mar. 3, 2009
7259950 Load-protection control circuit of power supply Aug. 21, 2007
7196436 Solid state relay for switching AC power to a reactive load and method of operating the same Mar. 27, 2007
7196435 Solid state relay and method of operating the same Mar. 27, 2007
7061143 Actuator unit with a base actuator an additional actuator and control unit Jun. 13, 2006
7042117 Power supply circuit for actuator of an on-board travel control device May. 9, 2006
7019419 Protecting a motherboard from damage due to installation of a higher voltage card Mar. 28, 2006
6960844 Electric switching device Nov. 1, 2005
6850402 Circuit and method for controlling current flow through a solenoid Feb. 1, 2005
6825579 Safety switching apparatus having a first and a second input switch and method of manufacturing the same Nov. 30, 2004
6822344 Determination of ac path states by floating controls Nov. 23, 2004
6570272 Safety switching device for connection and safe disconnection of an electrical load, in particular an electrically driven machine May. 27, 2003
6034445 Power source transfer lockout circuit Mar. 7, 2000
6034449 Load drive circuit Mar. 7, 2000
6011328 Electric power lockout apparatus Jan. 4, 2000
5982051 Electronic two-way switching circuit Nov. 9, 1999
5955796 Programmable wall switch actuator/timer Sep. 21, 1999
5912428 Electronic circuitry for timing and delay circuits Jun. 15, 1999
5642001 Overdrive circuit Jun. 24, 1997
5543997 Safety switching system for a working apparatus Aug. 6, 1996
5508878 Electronic timer using zero power while off Apr. 16, 1996
5283475 Television viewing control unit Feb. 1, 1994
5266841 Switch assembly for a timing module Nov. 30, 1993
5243232 Start-up pulse suppression circuit for industrial controller output Sep. 7, 1993
4811163 Automatic power bus transfer equipment Mar. 7, 1989
4797568 Electronic switching system for controlling indoor and outdoor lights Jan. 10, 1989
4774418 Method for setting a timer circuit and device in such a timer circuit Sep. 27, 1988
4769556 Electronic clock timer for a kitchen range Sep. 6, 1988
4749874 Electronic timer Jun. 7, 1988
4712019 Programmable electronic plug-in timer Dec. 8, 1987
4588901 Timer control for television May. 13, 1986
4580061 Time switches Apr. 1, 1986
4570216 Programmable switch Feb. 11, 1986
4564733 Current limiting control circuit for induction range Jan. 14, 1986
4533810 Start circuit for microwave oven Aug. 6, 1985
4513365 Function selector Apr. 23, 1985
4480195 Automatic shut-off device of a recording apparatus Oct. 30, 1984
4375048 Programmable time switch Feb. 22, 1983
4366366 Electric iron stand with time delay safety switch arrangement Dec. 28, 1982
4329596 Dishwasher dispenser control May. 11, 1982
4323747 Safety apparatus for microwave cooking devices Apr. 6, 1982
4249573 Programmed-sequence fluid distributor for use in feed and maintenance of detergent concentration in the washing bath of a dish-washing machine or the like Feb. 10, 1981
4198576 Holiday control unit Apr. 15, 1980

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