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Match Document Document Title
8103021 Audio reproducing apparatus  
An audio reproducing apparatus includes a power supply, an amplifier, a speaker, and a controller. The power supply is for supplying a voltage. The amplifier is for receiving the voltage and audio...
7920976 Averaging in an intelligent electronic device  
A method and apparatus measures electrical power usage and quality, while mitigating the effects of noise on measured signals or parameters. Specifically, a digital electrical power and energy...
7652859 Intelligent electronic device with integrated pushbutton for use in power substation  
The present disclosure describes a new pushbutton incorporated into new circuit configurations of an improved intelligent electronic device (“IED”), for use in power substation control systems. The...
6728087 Method and apparatus for remotely actuating a circuit protection device  
A method and apparatus for remotely operating a circuit protection device, such as a circuit breaker, to move the circuit protection device to an open condition to disconnect a load from a power...
6256185 Low voltage direct control universal pulse width modulation module  
An electrical control module and circuit for controlling a solenoid. The control circuit provides a constant voltage to a solenoid for a predetermined time period after which a pulse width...
6078491 Hybrid relay  
A hybrid relay with an electromagnetic relay system having at least one coil one core yoke unit, at least one armature which switches contacts and one power semiconductor whose switching path, in...
5895958 Input protection circuit for use in semiconductor device having an improved electrostatic breakdown voltage  
In an input protection circuit, a bipolar protection device is constituted of a semiconductor substrate of a first conductivity type, a first diffused layer of a second conductivity type formed in...
5719738 Circuit breaker remote closing operator  
A remote closing operator is positioned within a circuit breaker enclosure to allow remote operation of the circuit breaker operating mechanism to close the circuit breaker contacts. A closing...
5633776 Circuit breaker  
An electronically controlled latching circuit breaker capable of being remotely set or tripped. The electronic controls are current sensitive rather than thermally activated.
5502609 Electric circuitry for preventing contactor tip contamination in dry switching applications  
A contactor control system for a DC electric power system for reducing contactor tip contamination from dry-switching includes a first switch connected in circuit between a power source and a...
5467248 Relay control circuit  
A relay control circuit in which a capacitor is used as a power source of a transistor which prohibits operation of the transistor which is operated by input by switch operation. If power is no...
5416665 Vehicle electromagnetic clutch control device  
In a vehicle electromagnetic clutch control device, clutch current calculating means outputs a clutch current analog signal according to given travel control data and engine control data, a current...
5283572 Utility meter interface circuit  
An interface to facilitate storing in an electric utility meter transponder, water usage data so that when remotely interrogated, access can be had to both electric and water usage data. A pulse...
5235490 Trigger circuit for an electromagnetic device  
A trigger circuit for an electromagnetic device, in particular a solenoid valve of an injection system for an internal-combustion engine, has a control element for causing excitation of the...
5170313 Timed contact switch  
A timed contact switch apparatus has a conventional pushbutton placing a main switch in an actuated state when the pushbutton is depressed. A timing circuit is activated by the pushbutton to...
5105329 Apparatus for driving the armature of an electric stapler  
Solid state control circuitry for driving an electromagnetic armature of a battery operated electric stapler. The armature is activated by a trigger signal generated by a trigger switch which...
4873606 Safety control device for an actuator of the flap solenoid valve type  
A safety control device for an actuator of a flap solenoid valve, such as for an automatic transmission. The device includes a current control device which is connected to a shunt resistor for...
4860158 Low pressure metering fluid pump  
A low pressure metering pump having a hollow piston reciprocated in a cylindrical guide by a solenoid coil. A pair of check valves provide for unidirectional fluid flow through the cylindrical...
4798971 Apparatus for controlling device start up and off/on running periods  
A forced air gas heating furnace system includes a thermostat having a transformer for converting the typical household 115Vac to a 24V thermostat ac control voltage, and a switch, the thermostat...
4770417 Method and apparatus for controlling a bowling ball lift mechanism  
Method and apparatus for controlling and operating the return ball lift mechanism in a bowling alley. In a preferred embodiment the motor which drives the lifting belt is normally inoperative and...
4745629 Duty cycle timer  
An improved duty cycle timer provides a duty cycle control signal having alternate "on" and "off" intervals of different logic states. The timer utilizes integrated circuitry having first and...
4714977 Electronic delay timer  
A machine tool timing relay has immunity from electrical noise on a control signal, and has an oscillator capable of generating pulses having a predetermined frequency, a means for adjusting the...
RE32474 Variable time delay apparatus for controlling the start of a vehicle  
A circuit for providing an adjustable period of delay in a vehicle which is started by engaging the engine of the vehicle and a brake means, then disengaging the brake means after the period of...
4683904 Moisture sensor  
A moisture sensor having an oscillator circuit with its output frequency directly proportional to moisture percentage present in the substance of interest, such as soil. The oscillator circuit...
4657039 Moisture sensor  
A moisture sensor having an oscillator circuit with its output frequency directly proportional to moisture percentage present in the substance of interest. The oscillator circuit includes two...
4649458 Control circuits for electromagnetic coupling apparatus  
The control circuit for use with an electromagnetic coupling apparatus comprises a timer started when a power source switch is closed, an oscillator started by the switch and stopped by the timer,...
4636912 Circuit for controlling solenoid clutch  
A circuit for controlling a solenoid clutch wherein a gap is present between an electromagnet and an associated attracted member when in the disengaged state. The circuit controls the level of...
4563721 Circuit arrangement for actuating electromagnetic switchgear  
The invention relates to a circuit arrangement for actuating exciting coils for electromagnetic switchgear. A transistor is connected in series with the exciting coil, as an electronic switch....
4560892 One-shot delay timer  
A one-shot delay timer 4 is provided by a pair of comparator timers 14 and 18. The first comparator timer 14 responds to an input signal and provides a delayed output initiating the output pulse....
4560891 ON/OFF delay circuit  
A delay circuit 2 utilizes two comparator timers 4 and 6 and a minimum of logic to achieve a combination ON/OFF delayed function. The comparator timers 4 and 6 are resettable independently of each...
4555743 Timer circuit  
A timer circuit suitable for operating, for a required period of time, the windshield defrosting heater in an automobile, comprises a switch operative only in one direction, such as a momentary...
4546266 Magnetically actuated interlock  
An electrical circuit, the starting circuit for a motor vehicle for example, is selectively enabled by a control circuit which includes a magnetic field responsive switching device. Proper...
4538074 Power switch  
An improved power switch circuit for turning on manually and for turning off either manually or automatically a battery operated electronic instrument. The circuit includes one manual momentary...
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...
4490771 Control circuit arrangement for an electromagnetically operated power tool  
A control circuit arrangement for an electromagnetically operated power tool has a primary circuit including a solenoid and a semi-conductor switch, in series, the semi-conductor switch being...
4485342 Load driving circuitry with load current sensing  
A testable load driving circuit apparatus includes a solid-state load driver for controlling AC current loads coupled in series with a winding of a saturable core reactor used for sensing the...
4480194 Circuit for supplying a control contact with power and application thereof to the control of a rest time delay of a relay  
With this circuit, a current may be caused to flow through a contact (K) controlling the voltage supply of an electronic control circuit (24), of sufficient intensity for the reliability of the...
4473815 Battery control and alarm system for vehicles  
A battery control and alarm system for a vehicle electrical system including a first, normally open, solenoid-actuated switch connected in series with the main battery cable; a second, magnetically...
4455587 Electronic control circuit for the formation of a monostable switching behavior in a bistable relay  
An electronic control circuit for the formation of a monostable switching behavior in a bistable relay, including a logic circuit for the conversion of binary input signals into control signals for...
4451741 Electronic control for an automobile air conditioner  
The invention is an improved control for an air conditioner unit in an automobile. The control operates on a time cycle basis instead of using a sensor of air temperatures. The installation is...
4433357 Drive circuit for a latching relay  
A drive circuit for a latching relay includes a flip-flop, a timer and a semiconductive switching circuit for the relay. First and second input signals are applied to the flip-flop and first and...
4432624 Delay timer for a camera  
A relatively inexpensive electronic delay timer particularly suitable for portable use in such applications as control of a camera shutter. The timer can be used in either a leading or trailing...
4423765 Apparatus for reducing heater and air conditioning energy consumption  
The apparatus includes a first triac having terminals to which the control wire of a heater gas inlet valve solenoid or other heating element is connected and the apparatus further includes a...
4415943 Equipment protector and energy saving apparatus  
An equipment protector and energy saving apparatus includes transient protection as well as under voltage protection by preventing the reduced voltage from being applied to motors and other...
4409639 Solenoid driver circuit  
A control circuit for driving solenoids protects these devices from failure due to overheating caused by frequent on-off cycling. Control signals are passed through logic gates. A timer responds to...
4335418 Electronic interrupter  
A circuit for controlling the intermittent application of a dc potential to a device, such as a striker mechanism for a gong, having a member reciprocally moveable between rest and active...
4323789 Sequencer for power supply voltages  
A sequencer for two power supply voltages includes a master on-off switch, and two transistor switches which operate in response to the closing and then the opening of the master switch to turn on...
4303867 Domestic appliance comprising a protected programming device  
A domestic appliance comprises a programming device receiving on-time information and for updating, by way of repetitious signals, the on-time yet to be completed. The repetitious signals...
4291358 Magnetic valve with electronic control  
The magnetic valve with electronic control for increasing the attractive output has an energizing coil (AE), which is supplied in the attracting phase with an increased energizing current via a...
4251848 Electronic accelerator pump timing control  
Disclosed herein is an electronic timing circuit which can be incorporated in an accelerator pump timing control, also disclosed herein. The timing circuit is adapted to be connected to the first...
Matches 1 - 50 out of 222 1 2 3 4 5 >