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6483470 |
Power supply for a light pole mounted wireless antenna
The present invention provides electrical power to wireless communication antenna systems by tapping into the electrical circuit used to power outdoor elevated lighting systems. The connection is...
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5495385 |
Fully automatic, photosensor-controlled time switch device
A fully automatic, photosensor-controlled time switch device, which includes a control box having an input port connected to power supply and an output port for connecting the load to be...
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5444307 |
Wiper-activated headlight circuit
A relay circuit connects the headlight circuit and wiper circuit of a motor vehicle to actuate the low-beam lamps whenever the windshield wipers are activated. The relay circuit includes a delay...
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5374852 |
Motor vehicle headlight activation apparatus for inclement weather conditions
A lighting control apparatus for a motor vehicle, the motor vehicle having an electrical power supply, an ignition switch, lights, a lighting control switch for illuminating the lights, a wiper...
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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....
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5195016 |
Photoelectric load control system
A photoelectric load control system for applying a.c. power to a street light as a function of ambient light level includes switching means for selectively applying a.c. power to a street light for...
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5187383 |
Headlight actuator associated with windsheild wiper actuation having delay circuits and daylight detection
The disclosed circuit for actuating headlights has two time delay circuits, an AND gate, a power relay, and connections for appropriate installation to the circuitry of the automobile. When...
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5089931 |
Safety device for electrical apparatus containing a dielectric gas, in particular circuit breakers or voltage-droppers for measurement purposes
A safety device for an electrical apparatus comprising an enclosure filled with gas under pressure, the safety device comprising first means for detecting the appearance of an arc inside the...
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5016134 |
Driver circuit for single coil magnetic latching relay
A single coil magnetic latching relay drive circuit which utilizes AC power for energizing/deenergizing the relay. To energize the relay, a single full half cycle of the AC power at a first...
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4914721 |
Safety device
A safety device for an apparatus to be manipulated by an operator. The apparatus is connected via a supply line for a supply means to a supply means source. A handgrip is provided to be grasped by...
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4851969 |
Optical control system particularly suited for infrequently activated devices
An optical system that controls the operation of infrequently used electrically activated devices of a vehicle, such as hood or trunk latches or door locks, is disclosed. The optical control system...
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4841164 |
Light-sensitive switch structure and method with inverse off/on ratio
Light-sensitive switch structure for and method of turning a street light or other load on or off in response to variations in light level. The switch is designed to recognize a specific sequence...
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4791413 |
Soil moisture detector with light activated audio alarm inhibitor
The soil moisture alarm device comprising of a conductivity sensor, a photoelectric light sensor, an ON-OFF controllable audio generator, a buzzer and a DC battery as a source of power. The device...
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4782424 |
Circuit arrangement for the non-contacting control of a sanitary fitting
In a circuit arrangement for the non-contacting control of a sanitary fitting, the signal, by which the solenoid valve or valves is/are controlled, is monitored with regard to the leading or...
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4733323 |
Photothermic and time switch devices for outdoor low tension power supply system
A light responsive control and overload protection circuit for low voltage illumination systems includes means responsive to ambient light for providing an enabling output. Control means respond to...
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4723192 |
Automatic electricity control monitoring exit/entry device
A device turns ON and OFF electrical power in a building in response to entry and exit of people. Four sets of infra red light emitters and receivers supply receiver signals to entry and exit...
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4685018 |
Arc detector for gas insulated electrical apparatus
An arc detector includes a luminous diode 22 for irradiating the space within a vessel 1 containing an electrical device such as a bus bar 5 and filled with insulating gas such as SF 6 . A shielded...
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4621300 |
Safety monitoring system for punch press operators
This safety monitoring system for punch press operators is designed to prevent the operators from being injured by such presses or other factory equipment. Primarily, it consists of a pair of wrist...
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4618770 |
Electrical controller having a window discriminator
An electrical control has a detector which senses the infrared radiation within a given area. A pair of comparators function as a window discriminator. A voltage divider provides reference bias...
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4599052 |
Control device for metering pump
An electromagnetically operated fuel feed pump has an electronic control which comprises a phototransistor circuit with a delay element and a threshold switch. With this control a wear-free...
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4523251 |
Electronic apparatus comprising an input stage with a binary output connected to a relay control circuit
An electronic apparatus has an input stage (11) with a binary signal output (19). This signal output is connected to a relay control circuit which deenergizes or energizes the relay (15) in...
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4489359 |
Card key switch
A card key switch including a card key obtained by forming notches, in accordance with a key code, on opposite side edges of a card or a card casing for accommodating the card, a key cylinder...
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4458290 |
Circuit for controlling a D.C. electromagnetic brake
A circuit for controlling a D.C. electromagnetic brake, in which a series circuit consisting of a solenoid 35 for the electromagnetic brake and a transistor 52 for controlling the current that...
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RE31502 |
In-line energization and de-energization of an external load in series with an external source of electricity in response to externally sensed parameters
A control system for energizing and de-energizing an external load in series with a source of electricity incorporates a rectifying network having inputs in series with the alternating current...
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4364111 |
Electronically controlled valve actuator
A valve actuator is provided for use in conjunction with a valve having an actuating member movable between a first position in which the valve is closed and a second position in which the valve is...
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4356405 |
Fail-off photosensitive switch
A photosensitive switch including control means for turning a load on or off in response to the ambient light level. The switch is so arranged to turn the load off if the components thereof fail.
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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...
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4333490 |
Apparatus and method for controlling a watering system
An apparatus for automatically controlling a watering system in response to a comparison of an ambient condition with a time-varying reference level having an adjustable maximum value is disclosed....
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4328527 |
Selective ultraviolet signal amplifier circuit
A flame detection circuit means that is responsive to an ultraviolet responsive tube is provided with a safety circuit. The safety circuit encompasses a pulse responsive circuit that is responsive...
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4280164 |
Fail-safe relay system
A fail-safe relay system for use in infrared security barriers or other apparatus producing a sensing signal so as to control the de-activation and permit the re-activation of an interconnected...
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4242831 |
Toy apparatus with photoemissive motor control system
A toy apparatus with a photoemissive motor control system includes a chamber into which a phosphorescent member is placed, whereupon photoemission acts upon a photosensitive element to activate a...
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4217622 |
Control circuit for underground mining equipment
Mining equipment of the type operably dependent on the voltage and/or the phase of electric current is isolated from electric supply mains by an OFF switch in a control circuit before a current...
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4143287 |
Photo coupling line isolation circuit
The circuit includes a signal input circuit having a light emitting diode that is optically coupled to a phototransistor in a signal output circuit comprising a noise suppression circuit and a...
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4031560 |
Chopped light relay keyer
A phototransistor is coupled to a relay coil and the base of a switching transistor. Light impinging on the phototransistor will cause it to conduct, switching on the transistor causing current...
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4025190 |
Exposure control system for photographic copying
An exposure control for automatically controlling the duration of the exposure time for a photographic material to be printed. The light intensity is sensed by a sensor which could be either of the...
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4015912 |
Electromagnetic pumping device for liquids
An electromagnetic pumping device for liquids particularly for feeding liquid fuel in combustion devices, comprises a housing having a pumping chamber with an inlet to the pumping chamber and a...
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RE29143 |
Fail-safe apparatus for checking the presence of flame in a burner
A control device for monitoring the presence or absence of a flame through the use of an ionization tube sensitive to radiation of a predetermined wavelength and which is emitted by the flame....
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3946286 |
Device for controlling the formation of frost on cooling radiators and the defrosting of the same
A device to be used e.g. in cooling radiators, for monitoring the formation of frost and for defrosting. Frost formed on the cooling radiator causes a change in the quantity of light received by a...
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3940634 |
Solid state AC power relay
A trigger type device employing a pair of oppositely poled SCR's or a triac, provides bidirectional control of AC power through a simple circuit comprising a pair of rectifying diodes and an...
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3891980 |
Security systems
A security system controls admission of persons to protected areas. An authorised person carries in his pocket a token which generates at two discrete frequencies and when he approaches a door...
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3888181 |
Munition control system
1. A munition safing, arming and firing system comprising means for transting a code consisting of pulses of differing frequencies, means for receiving said code, means for segregating the received...
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3889162 |
Solenoid driving means
Apparatus for sequentially energizing and maintaining a pulrality of solenoids in operated condition for a predetermined period of time includes electro-optical distributive means for sequentially...
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3886379 |
Radiation triggered disconnect means
In conjunction with a circuit, such as an IC circuit or the like, which is sensitive to radiation, a high speed switching transistor normally biased in a saturation mode of operation connected...
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3878439 |
LIGHT CONTROLLED CIRCUIT
The circuit includes a phototransistor, a Schmitt trigger operable in response to a changing condition of the phototransistor, an amplifying and timing subcircuit coupled to the Schmitt trigger, a...
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3870877 |
STATIC SWITCHING CONTROL
An electrically controlled device is switched on and off by light actuated switch modules plugged into electrically interconnected tube sockets to which a source of current is connected. A circuit...
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3863115 |
RADIATION CONTROLLED SECURITY LOCK
A security device or lock for selectively generating an electrical control signal capable of operating an electromechanical lock or the like, in which light or other electromagnetic radiation is...
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3845355 |
FAULT PROTECTION CIRCUIT FOR AN ADJUSTABLE MOTORIZED HOSPITAL BED
The electrical control system for an adjustable motorized hospital bed is energized by an AC power supply through an isolation transformer. Power to the transformer's primary winding is interrupted...
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3842403 |
OPTICAL REMOTE CONTROL SYSTEM
A control including a transmitter and a receiver for remotely operating a device wherein the receiver and transmitter are powered by alternating current power supplies having a known phase...
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3840780 |
DETECTOR-PROTECTOR CIRCUIT
A detector-protector circuit includes monitoring circuits each individual to a component of an electrical device. Each monitoring circuit is responsive to a malfunction of its associated component...
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3839644 |
LABEL WRITING APPARATUS
A rotatable assembly includes a plurality of writing devices which are selectably moveable into and out of writing position. As the assembly rotates, the writing devices in the writing position...
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