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| Number | Title | Issue Date |
| 7245085 | Lamp fault detector The continuity of a series-wired, lamp circuit is restored after interruption caused by failure of a lamp filament by providing a control relay that is wired in parallel with each lamp. A power resistor having a resistive load substantially the same as that of a lam... | 07/17/2007 |
| 7221106 | Cordset based appliance controller An apparatus and method for distributed control of an electrical appliance having a plug and a load and two power carrying conductors connecting the plug to the load, comprising locating power control elements completely within the plug, connecting interface element... | 05/22/2007 |
| 7211972 | Power tool with remote stop The present invention is directed to a power tool including a wireless remote stop for terminating the flow of electricity to an electric motor. The electric motor is configured for operating a working element assembly of a power tool, such as an arbor/circular saw ... | 05/01/2007 |
| 7199498 | Electrical assemblies using molecular-scale electrically conductive and mechanically flexible beams and methods for application of same Electromechanical systems utilizing suspended conducting nanometer-scale beams are provided and may be used in applications, such as, motors, generators, pumps, fans, compressors, propulsion systems, transmitters, receivers, heat engines, heat pumps, magnetic field ... | 04/03/2007 |
| 7064502 | Power tool with remote stop The present invention is directed to a power tool including a wireless remote stop for terminating the flow of electricity to an electric motor. The electric motor is configured for operating a working element assembly of a power tool, such as an arbor/circular saw ... | 06/20/2006 |
| 7061738 | Protective circuit A protective circuit for limiting the voltage for a device to be protected, particularly a load with an upstream-connected voltage and current limiting device. The device to be protected is provided in an output circuit of the protective circuit and is separable by ... | 06/13/2006 |
| 6952355 | Two-stage converter using low permeability magnetics The use of low permeability magnetic material (NSME) with the disclosed design strategies form a two-stage isolated output converter system with the distinct advantages of superior density, efficiency, thermal operating bandwidth, service life, transient survival, a... | 10/04/2005 |
| 6429549 | Time switch A time switch includes a circuit board equipped with a time switch circuit and a display for displaying a time-schedule set by a user and current time, an operation unit having push buttons for setting the time-schedule and current time, and a casing in w... | 08/06/2002 |
| 6429547 | Time switch A time switch includes a circuit board equipped with a time switch circuit operated by a commercial power source, a battery board to which a back-up battery for supplying a back-up power to the circuit board in case of an interruption of a power supply fr... | 08/06/2002 |
| 6326882 | Apparatus and method for controlling a ventilation device The invention provides a method and apparatus for controlling a ventilation device. When the power switch of a room is turned on, the light of the room is turned on and the fan of the room is also turned on. When the power switch is turned off the light g... | 12/04/2001 |
| 6206538 | Miser light for cordless battery operated hand tools This invention provides a means to selectively, by single finger pressure of one hand on the operating switch of a cordless battery operated hand tool, turn the illumination of the work area on when required by the operator of the tool, then, by further f... | 03/27/2001 |
| 6134094 | Remotely controlled rotary switch for simulating multi-position, rotary, wafer-type, switches The present invention employs rotary switches that can be electromechanically set or reset remotely. Typical, although not limiting, is the use of the switch of the present invention by a trainer located remotely from students' STE. Manual operation is st... | 10/17/2000 |
| 6031335 | Electrical power control system for lighting systems An electrical power system to provide a selected voltage to a load such as a fluorescent lighting system is characterized by a winding 3 having a positive end connected to a positive rail and is tapped at a predetermined position for supplying an output t... | 02/29/2000 |
| 5811892 | Power supply system including mechanical output switches for use with a plurality of display tubes A low voltage power inverter utilizes reed switches to control a number of display tubes. The reed switches are controlled by magnetic coils or permanent magnets. The magnetic coils receive a control signal from a control circuit. The control circuit is p... | 09/22/1998 |
| 5581134 | Bypass switch for RF networks A make-before-break bypass switch is combined with a pair of probes projecting from a support where a member is provided with sockets to slidably receive the probes. The probes define a gap in a first RF circuit. The corresponding sockets are connected by... | 12/03/1996 |
| 5554895 | Electronic latching circuit for momentary contact switches A switch circuit for activating and deactivating a motor vehicle cruise control includes a 555 model timer integrated circuit which has a trigger terminal, a reset terminal, a threshold terminal, a control voltage terminal and an output terminal. A substa... | 09/10/1996 |
| 5394018 | Microprocessor based electrical apparatrus with false AC input rejection False ac signals produced by a noise suppression capacitor across a switch applying a switched ac line voltage signal to a logic input of a microprocessor in an electrical apparatus such as, for example, a contactor or circuit breaker, are phase shifted w... | 02/28/1995 |
| 5087825 | Capacity responsive keyboard A capacity responsive keyboard which eliminates the necessity for metal films on the touch surface includes an insulated substrate having a plurality of electrically conductive plate members mounted thereon and a dielectric member positioned over the plat... | 02/11/1992 |
| 4945256 | Device for producing even closing of a circuit breaker A circuit breaker for opening and closing contacts disposed on each phase of a multiphase electric power line has a photo-diode array and a light emitting diode array disposed on opposite sides of a driving rod of a driving mechanism, with a light passing... | 07/31/1990 |
| 4939618 | Lightning protected electric fence controller system and method An electric fence controller (20) interconnected to electric fence terminals (136, 138) by a three terminal spark gap arrangement (140) one terminal (142) being interconnected to the fence hot terminal (136), a second terminal (144) being interconnected t... | 07/03/1990 |
| 4907122 | Relay circuit having a pulse generator for closing contacts In a relay circuit, a stationary contact of a relay is coupled to a DC voltage source and a moving contact of the relay is coupled to a load circuit. The moving contact is switched to the stationary contact in response to a rapidly rising edge of a DC vol... | 03/06/1990 |
| 4901192 | Electrical circuit for driving a load with a large force applied intermittently An electrical circuit is employed for receiving current from a small battery and converting it into a large intermittent force which will move a heavy load. In the example shown the load is a clock spring which is wound in small increments by the large in... | 02/13/1990 |
| 4859868 | Electric fence energizer This invention relates to an electric fence energizer, including: two or more transformers, the primary windings of said transformers being connected to the main circuitry of the energizer and the secondary windings of the transformers being connected to ... | 08/22/1989 |
| 4859819 | Staged opening switch A staged switch for conducting a large electrical current for an indefinite time period and then rapidly switching the current into a load circuit. The switch comprises a first stage which can conduct a large electrical current for an indefinite time peri... | 08/22/1989 |
| 4841165 | D. C. power controller A DC power controller for controlling the rate at which direct current is furnished to a load. A signal generator provides a periodic signal having a first value during a first portion of each period and a second value during a second portion of the perio... | 06/20/1989 |
| 4801814 | Pulse generator A pulse generator is disclosed comprising a toothed disk which is rotatable with a rotary shaft and is capable of actuating at least two contact pairs for generating pulses and for sensing the direction of rotation of the rotary shaft via a rocker engagin... | 01/31/1989 |
| 4710645 | Device for monitoring the state of an electric switch or an electric relay A device for monitoring the state of a relay comprises an electrical insulation transformer whose secondary winding is connected, through a rectifier, to the output terminals of the relay. The primary winding of the transformer is in series with an oscill... | 12/01/1987 |
| 4709615 | Electrical firing systems An electrical firing arrangement for the sequential firing of a plurality of mortars stacked in end-to-end relationship within a single launching barrel. The firing arrangement comprises a pulse generator for producing mortar firing pulses and a circuit f... | 12/01/1987 |
| 4695739 | Multi-function switch-controlled lamp circuit A multi-function circuit controller provides auxiliary control functions for an existing single-pole, single-throw toggle switch by counting the number of changes of state of the switch that occur within predesignated delay periods from one state change t... | 09/22/1987 |
| 4678926 | Christmas tree lighting control This invention relates generally to ornamental lighting controls and particularly to a lighting control for Christmas tree lighting having preferably at least four duty cycle outputs and wherein the duty cycle pattern of each output differs, with respect ... | 07/07/1987 |
| 4672232 | Microprocessor operated timing controller The timing controller includes a triac, a receptacle, and an AC wall outlet coupled in series. A sensor is coupled across the receptacle to sense when a lamp plugged therein is turned on or off. A microprocessor is coupled to the sensor circuit and stores... | 06/09/1987 |
| 4658154 | Piezoelectric relay switching circuit To control the operation of a piezoelectric relay, control circuitry is disclosed for direct ohmic connection to a utility AC source to draw the minimal power required to actuate the relay's bimorph member pursuant to selectively switching power current t... | 04/14/1987 |
| 4626699 | Pulse generator An electromechanical pulse generator includes a toothed disk driven by a rotating shaft to operate two pairs of contacts to generate one pulse output and one direction-of-rotation output. The pulse contacts and the direction-of-rotation contacts operate i... | 12/02/1986 |
| 4591731 | Circuit for controlling the stopping of equipment The circuit for controlling the stopping of equipment comprises a switch with two contacts and with a pushbutton able to bring about the switching of the contacts into an open position and a closed position. The circuit comprises a supplementary member wh... | 05/27/1986 |
| 4555640 | Automatic high insulation switch Automatic high insulation switch with low consumption level and small overall dimensions. The switch is associated with an apparatus for measuring very low currents (10-7 to 10-14 amperes) comprising an amplifier controlled by an inp... | 11/26/1985 |
| 4409493 | Method and device for the transmission of electric power between parts turning at low speed Device and method for transmission of electric power between two parts turning at low relative speed. A flexible electrical conductor connects an intermediate part to the turning. A driving device is located between the intermediate part and the turning p... | 10/11/1983 |
| 4394583 | Electric fence energizers An electric fence energizer which comprises a capacitor connected across a power supply to an output transformer. An SCR is provided between the capacitor and the primary stage of the transformer and the SCR is arranged to discharge the capacitor. A contr... | 07/19/1983 |
| 4367416 | Random electric timer having a reversible motor A random timer including a reversible electric drive motor, an output means, and a power circuit connecting a power supply to the drive motor and output means and where two dissimilar cam type timing elements are controlled by the drive motor to provide i... | 01/04/1983 |
| 4232707 | Controller for fluid flow systems A controller which can be set to operate a group of sprinkler control valves, which can be easily set and tested for proper automatic operation, and which can operate a sprinkler system in a variety of ways. The controller includes a clock, a series of di... | 11/11/1980 |
| 4219741 | Random timer apparatus A random timer including a drive motor, an output means, and a power circuit connecting a power supply to the drive motor and output means and where two dissimilar timing elements are controlled by the drive motor, and the power circuit includes a multi-c... | 08/26/1980 |
