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7446541 Solenoid test device  
A solenoid test device includes a clock circuit, a control circuit, and an output port configured for coupling to two ends of a solenoid. The clock circuit generates a clock signal and sends it to...
7102869 Optical semiconductor relay  
An optical semiconductor relay comprises a light emitting element converting an electrical signal into an optical signal, a first photodiode array receiving the optical signal from the light...
7012342 Low power, scalable multichannel high voltage controller  
A low voltage control circuit is provided for individually controlling high voltage power provided over bus lines to a multitude of interconnected loads. An example of a load is a drive for...
6841815 Transimpedance amplifier assembly with separate ground leads and separate power leads for included circuits  
The optoelectronic device includes a photo diode and an amplifier, which amplifies output of the photo diode. The amplifier includes an input stage and an output stage. In one embodiment, the input...
6639782 Protecting circuit of the semiconductor factory automation  
First of all, a processing apparatus that is utilized in the semiconductor industry, a protecting circuit and an automatic running apparatus having the standardized mechanical interface (SMIF) are...
6369688 Automatic gang switch having a heat ray sensor  
The automatic gang switch having a heat ray sensor is fixedly mounted on a mounting frame having a generally rectangular opening. The length of a housing of the switch is approximately two thirds...
6136457 Manganese oxide material having MnO.sub.3 as a matrix  
A manganese oxide material that can be used as a switching device or as a memory device or the like is formed of Mn-based oxide material. The Mn-based oxide material exhibits insulator-to-metal...
6046899 Hybrid protective relay having enhanced contact response time  
A protective relay of the type consisting of a relay contacts controlled by means of a relay coil further includes a pair of triacs controlled by an optical switch. The high speed response is...
6034602 Computer monitor switch  
A computer monitor system including an infrared motion detecting switch that deactivates the monitor after a predetermined delay during which no movement is detected in the vicinity of the monitor....
5796347 Control of a device in an inaccessible location  
An arrangement is provided to power and initiate the output of information sensed and/or stored by a device in a sealed environment having a viewing window. The device is powered and the output is...
5786644 Two wire PIR occupancy sensor utilizing a rechargeable energy storage device  
A two wire detection device includes a relay switch setable to a high and a low impedance state and electrically coupled between a first terminal of an AC source and a first leg of a load, a second...
5633778 Infrared signal interface for use with barrier door operator  
An infrared signal interface enables an infrared detector module to communicate with the door edge signal input of a garage door operator. The infrared signal interface has a power supply for...
5623172 Two wire PIR occupancy sensor utilizing a rechargeable energy storage device  
A two wire detection device includes a relay switch setable to a high and a low impedance state and electrically coupled between a first terminal of an AC source and a first leg of a load, a second...
5596477 Contactless signaling device  
A contactless signaling device for operating a horn or bell is disclosed. The signaling device has an electro-magnetic coil which drives an armature. A light source is positioned opposite a light...
5473202 Control unit for occupancy sensor switching of high efficiency lighting  
A control unit for switching AC powered high efficiency lighting in response to a signal from an occupancy sensor. The lighting is switched by a hybrid mechanical relay/semiconductor switch. The...
5457595 Low-power relay operating circuit  
A high-power relay with a low-power operating circuit is usable in combination with a low-current source of DC power. The source has a hot terminal and a common terminal and a bistable relay has an...
5266807 Passive infrared detection system  
The present invention teaches an improved passive infrared detection system for use in controlling electrical wiring devices and systems in residential, commercial and industrial environments....
5162968 Fiber optic wiring control system  
The present invention teaches a control system wherein fiber optics controls the functioning of one or more types of wiring devices, such as a wall receptacle. With the use of the present...
5119065 Vehicle protection system  
A vehicle anti-theft device includes a lock body carried on the vehicle and having a key receiving a slot. A pair of bore holes are spaced apart from each other in a predetermined pattern and...
5079457 Dual solid state relay  
A dual solid state relay comprised of an input circuit, an optical coupler, a reference voltage circuit, a switch circuit, an SCR saturation circuit, a full wave bridge rectifier, a TRIAC driver...
5077484 Light controlled extension socket  
A light level controlled electrical extension socket comprising a main body on which is formed two pairs of insertion sockets for receiving an appliance's power plug, a photosensitive element...
5047662 Inductive load driving circuit with inductively induced voltage compensating means  
A driver circuit for driving from the same output node (6) an inductive relay (34) and a non-inductive lamp (30) having a transistor (16) for driving the relay and second transistor (18) for...
5025895 Elevator car top intrusion device  
There is provided a detection system for detecting attempted entry onto the shaft-side roof of an elevator cab which includes a power supply for supplying power to the system, a proximity detector...
4991054 Time-delay outdoor lighting control systems  
An optical lighting control, such as that used to control street lamps, delays the response of the lamps to changes of illumination while the lamps are on at night but avoids the delay in response...
4979069 Motor fault detector with optical isolation  
A motor protection apparatus with a current monitor, the current monitor sensing the presence of current in at least one phase of an electric motor. An ammeter is responsive to the monitor, the...
4897755 Apparatus and method for relay control  
Where there is a relay controlling an AC power circuit to a load, the apparatus of this disclosure includes a sensor for observing arc at the relay contacts and a control circuit which controls the...
4837455 Interrupt controlled switching device  
A power interrupt switching device for independently controlling normal and remote loads from a single control switch. The device includes an edge detector, an energy storage element, and a latch....
4724506 Power-saving system for bowling machine  
A power-saving system for use with a bowling machine which initiates motor operation when a bowling ball passes a position in front of the pit cushion and deactivates the motor upon the bowling...
4707338 Light-activated aroma generator with automatic cutoff  
An aroma generator that is rendered operative only when a switch-controlled electric light bulb is in a predetermined state which is either "on" or "off," the generator then functioning to...
4704656 Fiber optic wiring device control system  
The present invention teaches a control system wherein fiber optics controls the functioning of one or more types of wiring devices, such as a wall receptacle. With the use of the present...
4695435 Light-activated aroma generator  
An aroma generator that is rendered operative only when one turns on an electric light bulb in the room in which the generator is installed, the generator then functioning to discharge an air...
4611123 High voltage analog solid state switch  
A high voltage analog solid state switch is disclosed which includes a pair of MOS FET's 10 and 20 having commonly coupled sources 11 and 21 and commonly coupled gates 13 and 23. A photovoltaic...
4599675 Self monitoring solid state switching system  
A solid state switching system for use with solenoid operated control valves, especially control valves for dangerous machinery including a light screen guard fitted for personnel protection. The...
4408137 Break-before-make solid state relay  
A solid state relay is provided with a control logic circuit which receives a low level input control signal and controls at least two power field effect transistor (FET) switching elements by...
4369481 Electronic lock  
A lock comprising a laser adapted to emit a beam of light along a given path. A plurality of photo-diodes are electrically connected together and located at spaced apart positions defining a unique...
4369364 Monitoring device with an optical sensor for the detection of interference arcs in electrical systems  
A monitoring system with an optical sensor for the detection of interference arcs in electrical systems, particularly in enclosed SF 6 -insulated high voltage systems. The system improves the...
4358810 Circuit breaker with alarm  
A circuit breaker and alarm device for a circuit having a series connected interruptible current device whereupon a circuit breaker tripping means, attached to said circuit breaker, is adapted to...
4349857 Light responsive control device  
A light responsive control device comprising a light sensitive element, having a resistance which corresponds to the amount of light incident thereon, and an electromagnet having its coil connected...
4346427 Control device responsive to infrared radiation  
A device responsive to infrared radiation can control a current line to such items as interior lighting or room air conditioners in order to activate these items in response to the presence or...
4291359 Safety circuit for a potentially dangerous machine monitored by light  
A safety circuit for a potentially dangerous machine monitored by light and which works in an operating cycle. A safety circuit is described which utilizes a series of relays each of which is...
4277813 Environmental signal switch for motor vehicles  
The environmental signal switch is an electronic device primarily for automotive use which is responsive to the absence of daylight and moisture. The device is designed to send a signal to selected...
4177405 Photocell-controlled lighting system  
A photocell-controlled lighting system is disclosed. The system comprises a first photocell-controlled operated by a photocell, at least one night or decorative light adapted to be connected to a...
4095740 Condition responsive thermostat control apparatus  
An ambient room illumination responsive control automatically changes the setting of a thermostat with ambient illumination. A thermostat has a pair of temperature responsive switches connected in...
4095100 Light responsive switch  
An ambient light responsive switch for street lamps or other loads, includes a thermostatic switch of the thermal time delay relay type, connecting a load to a current source and exposed to a...
4051394 Zero crossing AC relay control circuit  
An AC relay control circuit comprising a pair of back-to-back, series connected zener diodes control current flow through a control resistor. The control resistor is connected in parallel with...
3995202 Condition-initiated load control circuit  
In the device disclosed, a load is energized from energy-carrying lines. A detector responsive to a cyclically recurring physical condition, such as daylight, places a switch either in an operating...
3963947 Digital time delay relay utilizing logic elements  
Solid-state digital time delay relay having a pair of complementary contacts one of which breaks or opens before the other makes or closes. The switching or transfer function utilizes a light...
3961180 Luminaire duration control  
A luminaire duration control which, in combination with a photocell, electrically activates an associated luminaire in response to the amount of light received by the photocell. A predetermined...
RE28656 Thermostatless blanket control circuit  
An overload protection circuit for an electric heating blanket is provided. A sensing element in the blanket is coupled to a neon-filled diode. When an overload condition is sensed the diode ceases...
3916183 Ambient-light-regulated night cut-off power control unit  
A power control unit that, responsive to the dimming of light at dusk, energizes a lamp load as a result of a change of state of a photocell. Furthermore, the photocell, with the assistance of a...
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