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8035942 Safety switch device  
A safety switch device for switching a power supply for a load on and off, having at least one driveable switching element, in particular a relay, and a safety circuit for checking a switching...
7999668 Series interlock system with integrated ability to identify breached locations  
A system is provided for implementing a series interlock loop. An example of the interlock system includes a series interlock loop, a data table, and a control module. The series interlock loop has...
7992321 Laundry dryer having three roller drum support system and reversing idler assembly  
A laundry dryer includes a cylindrical drum shell mounted for rotation on front and rear stationary bulkheads of the dryer. A drive system is configured to rotate the drum in first and second...
7911086 Switching circuit, signal output device and test apparatus  
A signal output device that outputs an output signal according to an input signal expressing a logical value that includes a high-voltage side switching circuit between a first terminal and a...
7760528 Method and apparatus for providing high speed, low EMI switching circuits  
Methods and apparatus are provided for generating low EMI display driver power supply. The methods and apparatus include switching circuits that utilize two groups of parallel circuit traces, each...
7498862 Switch for handling terminal voltages exceeding control voltage  
A switch provided between a first terminal and a second terminal with a varying cross terminal voltage. The switch contains two transistors, with the source terminal of the first transistor being...
7259950 Load-protection control circuit of power supply  
A load-protection control circuit of a power supply, which applies to the power supply that has a maximum power-limiting function. The power supply includes a power transformation circuit which...
7196435 Solid state relay and method of operating the same  
A solid state relay coupleable to first and second phase busses of an AC power source for switching power from the first and second phase busses to a load comprises: first and second power...
7196436 Solid state relay for switching AC power to a reactive load and method of operating the same  
A solid state relay coupleable to first and second phase busses of an AC power source for switching power from the first and second phase busses to a load including a reactive component comprises:...
7061143 Actuator unit with a base actuator an additional actuator and control unit  
An actuator unit includes a base actuator and an additional actuator, via which a useful circuit can be opened and closed. Given proper functioning, the base actuator can be activated by supplying...
7042117 Power supply circuit for actuator of an on-board travel control device  
A power supply circuit for various actuators includes control lines associated with the actuators that receive power from a single voltage increasing circuit. The power supply circuit supplies...
7019419 Protecting a motherboard from damage due to installation of a higher voltage card  
A motherboard is protected from burning or other damage caused by installation of card of a higher voltage than that for which the motherboard is designed, such as the installation of an AGP 2× ...
6960844 Electric switching device  
An electric switching device for alternating current comprises two branches (2, 3) connected in parallel in a current path and having each at least two contact members (4–7) connected in series. A...
6825579 Safety switching apparatus having a first and a second input switch and method of manufacturing the same  
The present invention relates to a safety switching apparatus having a first and a second input switch, whose respective switch settings define an input-side manipulated variable redundantly with...
6822344 Determination of ac path states by floating controls  
An electronic control, with a floating ac power supply, that compares the digital signals produced by connections between ac circuit nodes and digital nodes to determine whether path(s) in ac...
6570272 Safety switching device for connection and safe disconnection of an electrical load, in particular an electrically driven machine  
The present invention relates to a safety switching device for connecting and safely disconnecting an electrical load, in particular an electrically driven machine. The safety switching device...
6034445 Power source transfer lockout circuit  
Electrical loads are powered by one of several different power sources through a selector switch. A monitoring circuit monitors the different power sources to sense a change of state, that is,...
6034449 Load drive circuit  
The invention relates to a load drive circuit wherein an emergency shutdown switch for forcible interruption and a normal shutdown switch for normal current control are disposed in series in a load...
6011328 Electric power lockout apparatus  
An electric power lockout apparatus is provided which includes an input terminal for electrically coupling the apparatus to an electric power source and an output terminal for electrically coupling...
5982051 Electronic two-way switching circuit  
A two-way switching circuit for connecting a supply power to a load comprises two electronic switches connected to each other. Each of the two electronic switches includes two electronic switch...
5955796 Programmable wall switch actuator/timer  
A self-contained programmable wall switch actuator/timer unit can easily be mounted directly onto the outside of the face plate of a standard wall switch. This actuator/timer unit can be programmed...
5912428 Electronic circuitry for timing and delay circuits  
An electronic delay circuit (10) useful for the delayed initiation of detonators illustrates several novel features that may be combined, including a novel oscillator (34), a programmable timer...
5642001 Overdrive circuit  
An overdrive circuit having a first current source which supplies an overdrive current and a second current source which supplies an ordinary current smaller than the overdrive current. A first...
5543997 Safety switching system for a working apparatus  
A safety switching arrangement for the switching on and off of the power supply (11) of two actors (12a, 12b) for example relays, which, in dependence on the switching on of the current, and in...
5508878 Electronic timer using zero power while off  
An apparatus interrupts a circuit at a predetermined time. The circuit includes a load and a source of time-varying current. The apparatus includes a relay circuit including a latching relay...
5283475 Television viewing control unit  
A lockable control box for a television is designed to have the television plug attached to a timer. A programmable control panel is used to regulate the hours the television is able to be turned...
5266841 Switch assembly for a timing module  
A timing device incorporates a timing module having a relatively low capacity for use in a heavier application than it could normally be used due to the low capacity of the timing module switch...
5243232 Start-up pulse suppression circuit for industrial controller output  
A flash-on reduction circuit for use in the binary state output circuitry of an industrial controller employs a current conductor to charge parasitic capacitances of the output circuitry when the...
4811163 Automatic power bus transfer equipment  
A circuit for protecting the power contacts (18, 20) of automatic bus transfer equipment, including high speed solid state switches (30, 32) connected across the respective contacts. A timing and...
4797568 Electronic switching system for controlling indoor and outdoor lights  
An electronic switching system, designed to automatically illuminate and delay in extinquishing 115 V 60 Hz outdoor/indoor lights and electrical wall receptacles. The system includes an automatic...
4774418 Method for setting a timer circuit and device in such a timer circuit  
The invention relates to a method and a device for setting a timer circuit, especially in a fuse (1b), there being used a setting unit (1a) for the transfer of setting signal to the timer circuit...
4769556 Electronic clock timer for a kitchen range  
An electronic clock timer for a kitchen range; in which the timer includes a control circuit, a display area, with entry elements and with a switch arranged in the control circuit, through which...
4749874 Electronic timer  
An electronic timer, preferably a kitchen range timer, which includes a control circuit, a display area, input elements, and a switching arrangement which selectively connects an appliance (auto...
4712019 Programmable electronic plug-in timer  
A plug-in timer has a set of input terminals and a set of output terminals as well as a contactor operable to make and/or break electrical connection between these sets of terminals in accordance...
4588901 Timer control for television  
A device for regulating the maximum time a television or the like can be operated, comprising a first counter (19) that can be manually set by use of a key (24A) to set a switch (24) with a...
4580061 Time switches  
A time switch (100) comprises terminals (110) spaced around a slip ring (108) connected to a voltage source (V). A motor (104) drives a brush (102) to sequentially connect the terminals (110) to...
4570216 Programmable switch  
A fully automatic programmable wall switch timer for controlling lighting circuits is described. The device provides user selected lighting circuit operation at predetermined event times, for...
4564733 Current limiting control circuit for induction range  
The provision in a range having an electrically energizable heating unit and a control for selectively causing energization of the heating unit from a power supply of an improved circuit for...
4533810 Start circuit for microwave oven  
A start circuit arrangement for a microwave oven including a power control relay circuit which is independently responsive to a user actuable momentary start switch and to a programmed electronic...
4513365 Function selector  
A function selector has an indicating unit which contains several identical groups of switches. All of the switches are connected with a control input of a microcomputer via a common control...
4480195 Automatic shut-off device of a recording apparatus  
An automatic shut-off device for a recording apparatus such as a copying machine has a commercial power source for powering the machine during an ON-state, charging means connected to the power...
4375048 Programmable time switch  
The invention relates to a time switch assembly of the type having an electric stepping motor, a pulse generator and a connecting drive therebetween for driving the motor at speeds corresponding to...
4366366 Electric iron stand with time delay safety switch arrangement  
A stand for an electric iron incorporates an automatic time delay safety switch arrangement which reduces the chances of fires being started by an unattended iron and serves to save a substantial...
4329596 Dishwasher dispenser control  
A dishwasher dispenser control having a circuit including two single pole, double throw switches for actuating the heater of the dishwasher independently or in combination with dispenser elements...
4323747 Safety apparatus for microwave cooking devices  
A safety arrangement for microwave ovens or similar cooking devices, in which a circuit breaking element and a main switch, which is arranged to be open in conjunction with an unlocking operation...
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  
A programmed sequence fluid distributor system is provided which is particularly adapted for controlling fluid feeding and the maintenance of the detergent concentration in the washing bath of a...
4198576 Holiday control unit  
This unit interrupts normal operation of an electrical circuit energized in cycles by a time clock, for one of the cycles. The unit includes a first means actuable by means of a switch for...
4155015 Light switch  
The specification discloses a switching system for operating an incandescent lamp from a plurality of stations. The controlling switch at each station is wired in series with the lamp, and other...
4134003 Dishwater control  
A dishwasher utilizing treating liquid for washing dishes in a treating cycle and air for drying the washed dishes in a drying cycle. An electric heater is provided for heating the dish-treating...
4117294 Safety arrangement for microwave ovens  
A safety interlock system for microwave ovens comprising first and second interconnected switches activated by the oven door. Each switch has make-and-break contacts. The first switch interrupts...
Matches 1 - 50 out of 107 1 2 3 >