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| Number | Title | Issue Date |
| 8134820 | Contactor control circuit A contactor control circuit is disclosed for controlling a contactor connecting an alternating current electrical power source to a load. The contactor control circuit comprises a switching circuit connected in series with the inductor for controlling the conduction... | 03/13/2012 |
| 8072729 | Battery-spark and reverse polarity protection method and circuit for safely connecting a trolling motor to a power source The protection method and circuit provide a time delay after a first contact with the power source is made until full power is allowed connection to the trolling motor. This time delay is longer than the “bounce” time, or the time a user may “bounce” a conta... | 12/06/2011 |
| 7357359 | Electronic code follower relay An electronic code following relay for use in a railroad signaling system includes a timing circuit for receiving an input square wave signal coded at a pre-determined code rate, and regenerating the input square wave signal at the pre-determined code rate after a p... | 04/15/2008 |
| 7325781 | Automatic bathroom flushers with modular design A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the ou... | 02/05/2008 |
| 7205747 | System and method for monitoring a charging period in a battery charger An apparatus and method for disabling a charging counter circuitry within a battery charger is disclosed. The apparatus includes circuitry connected to a pin associated with the charging counter circuitry of the battery charger, said circuitry receiving a signal fro... | 04/17/2007 |
| 7188822 | Enclosures for automatic bathroom flushers A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the ou... | 03/13/2007 |
| 7164570 | Excitation control circuit for intermittently bypassing return current An excitation control circuit for suitably exciting a solenoid while current consumption and heating are effectively reduced. The control circuit has a driving circuit for driving a coil of a solenoid in response to a pulse signal supplied from an external device; a... | 01/16/2007 |
| 7156363 | Bathroom flushers with novel sensors and controllers A bathroom flusher (10) includes a body having an inlet (12) in communication with a supply line and an outlet (16) in communication with a flush conduit, a valve assembly in the body positioned to close water flow between the inlet and the outl... | 01/02/2007 |
| 6978745 | System for controlling electromechanical valves in an engine A system for electronically actuating valves in an engine. The system includes first and second voltage sources, and a plurality of valve actuator subsystems coupled therebetween. Each valve actuator subsystem has a valve actuator and a switch configured to selectiv... | 12/27/2005 |
| 6788017 | Period adjustment circuit of disconnection and restart IC A period adjustment circuit of disconnection and restart IC comprises a second capacitor, which is connected to a resistor and a transistor connected in parallel. One end of the resistor is connected between the disconnection and restart IC and the first capacitor. ... | 09/07/2004 |
| 6766222 | Power sequencer control circuit A system and method are presented for sequentially applying electrical power to multiple loads. The system is capable of operating in conjunction with other such systems as either a slave or master. When operating as a master, the system is activated as soon as it i... | 07/20/2004 |
| 6744616 | Method and apparatus for controlling an electronic control A method for controlling an electronic control using a circuit that includes a damper capacitor. The method includes substantially discharging the damper capacitor and enabling operation of the electronic control when the damper capacitor is substantially discharged... | 06/01/2004 |
| 6687553 | Dual gain variable control system A method for controlling a solenoid using a single coil solenoid for both course and fine adjustment. A resistor or series of resistors may be used in parallel/for current controlled solenoids or in series for voltage controlled solenoids for allowing cou... | 02/03/2004 |
| 6671157 | Method for effecting an electronic drive control The invention relates to a method for effecting an electronic drive control of a drive coil of a protection system using an electronic device which comprises a microcontroller. The aim of the invention is to increase the serviceable life of a protection s... | 12/30/2003 |
| 6661636 | Method for controlling an electromechanical actuator drive So that an actuator drive which holds an actuator element for actuating, for example, a charge cycle valve of an internal combustion engine, in a limit position by a coil, can be switched at the correct time into the other limit position, the energization... | 12/09/2003 |
| 6472877 | Method and apparatus for measuring the opening time of a medium voltage air circuit breaker A circuit and method for measuring the switch opening time, in cycles, of a medium voltage air circuit breaker. The circuit senses DC current feeding the trip coil in the circuit breaker. The timer starts a predetermined programmable time interval after t... | 10/29/2002 |
| 6370002 | Electromagnetic operation of the processing of objects In an electromagnetic operating system having a coil for electromagnetically controlling a mechanical operating member for operating the processing of objects in response to an alteration in an electrical voltage condition, the control system is arranged ... | 04/09/2002 |
| 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 modulated voltage is supplied. The circuit further includes compon... | 07/03/2001 |
| 6198245 | Look-ahead closed-loop thermal management Thermal management within an electrically powered systems requires monitoring, from time-to-time, both electrical power consumption and temperature within the system. The power consumption and temperature data thus obtained permits developing over time a ... | 03/06/2001 |
| 6123092 | Electromagnetic solenoid valve drive circuit A circuit for driving an electromagnetic solenoid valve, used as a fuel injector in an internal combustion engine, having a needle valve biased in a closing direction by a spring and a solenoid which moves the needle valve in an opening direction when ene... | 09/26/2000 |
| 6121889 | In-wall electronic timer An in-wall mounted electric timer comprising a housing for mounting in an electric box in a wall. The electric timer comprises a user interface on the housing. The user-interface comprises an input panel and a display. The electric timer further includes ... | 09/19/2000 |
| 6060797 | Solenoid operated remote resetting device with a protective activation circuit A solenoid operated remote resetting device with a protective solenoid activation circuit is disclosed. The device includes a housing for enclosing and protecting a solenoid with a movable plunger, a movable mechanical operator having an operator arm exte... | 05/09/2000 |
| 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. The system is designed to prevent damage to the screens t... | 03/07/2000 |
| 5953198 | Electromagnetic drive apparatus An electromagnet drive apparatus being characterized by a switching element 1 connected in series with a coil 3 of an electromagnet; a pulse signal generation circuit 16 which generates, on predetermined cycles, a pulse signal used for turning on the swit... | 09/14/1999 |
| 5909064 | Time delay relay circuit A time delay relay circuit of the present invention includes a power supply terminal, a relay having a first terminal connected to the power supply terminal, and a timing circuit, for activating the relay for a preset duration, having a supply input for r... | 06/01/1999 |
| 5889645 | Energy preservation and transfer mechanism An arrangement for driving actuator coils for two or more driven devices employs a microprocessor or similar controller and an actuator driver circuit. The actuator driver circuit controls two or more relay actuator coils from a single microprocessor outp... | 03/30/1999 |
| 5831345 | Priority relay circuit with timer A priority control system is disclosed for controlling multiple secondary load devices, and one priority load device. The secondary load devices can be randomly controlled at any time, except when the priority load device is activated, in which case, all ... | 11/03/1998 |
| 5828540 | Method of protecting against failure of a circuit breaker The invention relates to a method of protecting against circuit breaker failure, said circuit breaker having contacts capable of moving between a closed position and an open position, and vice versa, and being fitted with protection apparatus including fa... | 10/27/1998 |
| 5825102 | Fail-safe circuit A fail-safe circuit (10) comprises a storage battery (11) for electrical charges as well as a first charge path (12) which optionally connects the storage battery (11) to a first potential (UL). A second charge path (14) and a third charge path (15) optio... | 10/20/1998 |
| 5821642 | Arc prevention circuit for a mechanical switch A device for controlling a switching relay to deliver power to a load. The switching relay selectively couples a hot leg of a utility power supply to the load. The load is coupled to a neutral wire of the utility power supply. The device includes a sensor... | 10/13/1998 |
| 5815365 | Control circuit for a magnetic solenoid in a modulating valve application A solenoid control circuit is disclosed for providing the initial pull-in power to a magnetically-held solenoid and thereafter providing a release-pulse upon power loss to the circuit to release the solenoid. The solenoid control circuit has an AC input w... | 09/29/1998 |
| 5811888 | Automatic vehicle power and headlight controlling device with detecting function of a generator and delayed effect An automatic vehicle power and headlight controlling device with delay effect, including a delay circuit, an in-car sensing circuit, an out-car sensing circuit and a power supply circuit. The delay circuit is connected to both the in-car sensing circuit a... | 09/22/1998 |
| 5754387 | Method of monitoring contactor operation Upon initiation of operation of a contactor from an unactuated condition to an actuated condition, the maximum magnitude of an initial current conducted to the coil of the contactor is determined. Once the contactor has been operated to the closed conditi... | 05/19/1998 |
| 5748433 | Method of accurately controlling the armature motion of an electromagnetic actuator A method of controlling a motion of an armature away from an electromagnet of an electromagnetic actuator includes the following steps: passing an electric current through a solenoid of the electromagnet for holding the armature at the electromagnet again... | 05/05/1998 |
| 5734203 | Headlight circuit A headlight circuit for an automobile which has two versions. One version can be used in automobiles which do not have daytime running lights and the other version can be used in automobiles which have daytime running lights. The circuit includes headligh... | 03/31/1998 |
| 5703748 | Solenoid driver circuit and method A solenoid driver circuit is provided that operates a solenoid in a quiet operation by reducing solenoid armature velocity. A pulse signal and a ramp signal are provided by a frequency generator and a ramp generator, respectively. A frequency switching ci... | 12/30/1997 |
| 5654865 | Power and control circuit for an electric door strike This invention discloses a versatile power and control circuit for an electric door strike that is operable in four different modes with readily adjustable release times. In addition, the invention is directed toward the provision of a highly efficient po... | 08/05/1997 |
| 5621253 | Automobile safety device An automobile safety device that includes an input wireable to the windshield wiper motor that automatically independently activates each headlight and the rear window defogger.... | 04/15/1997 |
| 5600185 | Cross over delay apparatus A device for controlling the release of a drag racer which is adapted for use in elapsed time starts as well as standard starts. The race crew inputs the opponent's established elapsed time and their own established elapsed time into the invention, as wel... | 02/04/1997 |
| 5563459 | Apparatus for controlling opening and closing timings of a switching device in an electric power system An apparatus for controlling a switching device provided for breaking or closing a power line connecting a power source to a load in an electric power system includes a switching timing control unit for controlling the timing to apply a breaking signal to... | 10/08/1996 |
