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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 7498862 |
Switch for handling terminal voltages exceeding control voltage |
Mar. 3, 2009 |
| 7259950 |
Load-protection control circuit of power supply |
Aug. 21, 2007 |
| 7196435 |
Solid state relay and method of operating the same |
Mar. 27, 2007 |
| 7196436 |
Solid state relay for switching AC power to a reactive load 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 |
| 6034449 |
Load drive circuit |
Mar. 7, 2000 |
| 6034445 |
Power source transfer lockout 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 |
| 4155015 |
Light switch |
May. 15, 1979 |
| 4134003 |
Dishwater control |
Jan. 9, 1979 |
| 4117294 |
Safety arrangement for microwave ovens |
Sep. 26, 1978 |
| 3942082 |
Multi-line chemical injection system |
Mar. 2, 1976 |
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