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| Number | Title | Issue Date |
| 7150606 | Electromagnetic fuel pump An electromagnetic fuel pump, including a pump, an electronic control circuit board assembly (PCB) and electromagnetic coil operatively arranged to operate the pump, and, a housing arranged to house the pump and the PCB/coil assembly, the housing including an integr... | 12/19/2006 |
| 7094041 | Electromagnetic drive type plunger pump With structure comprising a cylinder, a magnetic circuit to exert a mountain-shaped thrust, and a feeding spring to exert an urging force to a plunger during a feeding process, fuel is sucked by movement of the plunger and energy is accumulated in the feeding spring... | 08/22/2006 |
| 7059780 | Fiber stub, optical module, optical transmitter, and optical communication system The present invention relates to an optical module with a small size and improved mass-productivity. The optical module comprises a fiber stub including an optical fiber, a sleeve containing the fiber stub, and a semiconductor optical amplifying device. A Bragg fibe... | 06/13/2006 |
| 7004016 | Probe system for ultrasonic processing tank The invention provides systems, methods and apparatus for processing delicate parts within a process tank such as an ultrasonic tank. Typically, one or more transducers connect to the tank and respond to drive signals from a generator to produce ultrasound within pr... | 02/28/2006 |
| 6873514 | Integrated solenoid system An integrated solenoid system including a single housing containing a solenoid, a controller and one or more electrical connections. The controller includes temperature compensating means and/or voltage compensating means thereby providing predetermined, substantial... | 03/29/2005 |
| 6873216 | Chattering eliminating apparatus including oscillation circuit using charging and discharging operations In a chattering eliminating apparatus, a coincidence circuit receives an input signal of the apparatus and an output signal of the apparatus to determine whether or not a level of the input signal of the apparatus is the same as a level of the output signal of the a... | 03/29/2005 |
| 6865064 | Drive apparatus and drive method for electromagnetic drive actuator A drive apparatus for an electromagnetic drive type actuator, which includes a movable element, a fixed element, a connection element, a magnetic field generation element, and a drive coil, such that the movable element is caused to oscillate by an interaction betwe... | 03/08/2005 |
| 6639799 | Integrated vapor chamber heat sink and spreader and an embedded direct heat pipe attachment Two types of thermal management devices for efficiently dissipating heat generated by high performance electronic devices, such as microprocessors for desktop and server computers producing a power of near 200 Watts and high power electronic devices that ... | 10/28/2003 |
| 6625002 | System and method for limit sensing of gaps between surfaces during optical component configuration An important consideration in making a fiber optic device (e.g., comprising fiber in a polished tube at a certain angle and GRIN lens) is to limit sense, maintain and/or measure the gap-width between these two polished surfaces before they are either fuse... | 09/23/2003 |
| 5748431 | Solenoid driver circuit An electrical circuit applies an oscillatory electrical current to a coil of a solenoid in order to cause the solenoid to move in response to a command signal. The circuit includes a signal divider for generating an upper peak current signal value from th... | 05/05/1998 |
| 5255152 | Controller for fixed-time pull-in of a relay A controller for a relay controls the pull-in time of the armature of the relay by controlling the power applied to the relay coil. To determine the actual pull-in time, the time of closure of the contacts is sensed and the time at which power is applied ... | 10/19/1993 |
| 5172298 | Electromagnetic actuator An electromagnetic actuator for use with a fuel injection pump, for example, has a position detector for detecting the operating position of a plunger which is axially movable. The electromagnetic actuator includes a core mounted on one end of the plunger... | 12/15/1992 |
| 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 discharges an energy storage device through the armature. Energ... | 04/14/1992 |
| 4957273 | Remote shut-off valve A system and method for actuating a device from a remote location includes a signal generator for establishing a signal indicative of a desire to actuate the device, detector means for sensing the signal indicative of a desire to actuate the device and fo... | 09/18/1990 |
| 4914315 | Method for loosening the contacts of a sticking relay as well as circuit arrangement for carrying out the method A method for releasing the contacts of a sticking relay by sensing whether or not the relay contacts stick together in a closed condition and when the contacts stick together, applying an AC voltage on pulsating DC voltage to the winding of the relay coil... | 04/03/1990 |
| 4890188 | Solenoid driver system A solenoid driver system drives a solenoid, such as a solenoid in a glue applicator or any like apparatus incorporating a solenoid, and which requires control of the solenoid in response to a signal voltage. The solenoid driver system generates a turn on ... | 12/26/1989 |
| 4868709 | Electromagnetic drive circuit An electromagnetic drive circuit comprises a coil for detecting and driving a permanent magnet; a comparator for generating an output when the induced voltage of the coil exceeds a reference voltage; a pulse generator for generating a drive pulse train in... | 09/19/1989 |
| 4866564 | Electromagnetic drive circuit Herein disclosed is an electromagnetic drive circuit for driving a pendulum or the like, comprising: a coil for detecting and driving a permanent magnet; a reference voltage source having a variable reference voltage; a comparator for generating an output... | 09/12/1989 |
| 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 guide in response to the reciprocation of the piston. A seal a... | 08/22/1989 |
| 4825332 | Electromagnetic driving circuit An electromagnetic driving circuit for driving a pendulum comprises a coil for detecting and driving a permanent magnet, a comparison circuit for comparing an induction voltage induced in the coil with a reference voltage, a generating circuit for generat... | 04/25/1989 |
| 4825333 | Drive circuit A drive circuit for an inductive load includes a switching device connected in series with the load and controlled by a constant frequency oscillator. The mark/space ratio of the signal supplied to the switching device by the oscillator can be varied in a... | 04/25/1989 |
| 4812945 | Method and apparatus for providing autoranging for an AC/DC power management circuit for DC solenoid actuators A method for providing a power management for a DC solenoid actuator includes the steps of initially supplying a first number of DC current pulses to the actuator and after a first time interval reducing the number of pulses applied to the solenoid in dir... | 03/14/1989 |
| 4797779 | Pulsed power supply A power supply for controlling a solenoid actuated lock includes high and low frequency pulse generators, the outputs of which control a switching transistor. The low frequency pulses seat the solenoid plunger, and the high frequency pulses maintain the p... | 01/10/1989 |
| 4769737 | Circuit for driving a relay used in an AC circuit, with a protection against contact welding A circuit for driving a relay having at least two contacts and an excitation coil. An AC power source is connected to the contacts of the relay for applying a voltage of a prescribed frequency to these contacts. A detector section compares a pulse current... | 09/06/1988 |
| 4763222 | Vehicle suspension control with actuating circuit protection A motor vehicle suspension control includes a solenoid actuator having an actuating coil connected in series with a transistor across an electric power source and circuit protection apparatus for the transistor. The voltage across the transistor is monito... | 08/09/1988 |
| 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 includes two spaced plates in the substance which function as ... | 08/04/1987 |
| 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, and a drive circuit which intermittently passes current th... | 03/10/1987 |
| 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 exciting current supplied to an exciting coil of the solenoid ... | 01/13/1987 |
| 4630165 | D.C. power control for D.C. solenoid actuators A D.C. power control for a D.C. solenoid actuator which may be used for a D.C. solenoid operated valve uses a timer circuit for switching from an initial high pull-in power after a predetermined delay to a low hold power for the valve solenoid utilizing a... | 12/16/1986 |
| 4594636 | Reactive load drive and surge protection An electrical drive circuit arrangement to control the energization of a reactive load with a high voltage including a control stage, an electrically isolating control signal transformer and an output stage including power control semiconductor devices an... | 06/10/1986 |
| 4551781 | Control circuit for magnetic probe A control circuit for a magnetic probe. A power supply connects the available power to the direct voltages required to control electronic circuitry, and a voltage required for the magnetic probe. A clock establishes a time base for the entire device. A cu... | 11/05/1985 |
| 4541562 | Mixing valve The mixing valve includes a plurality of flow regulating assemblies (A) each of which independently regulates the flow of one of a plurality of fluids. Each flow regulating assembly includes a pressure displaceable structure (22) which is physically displ... | 09/17/1985 |
| 4464613 | Blocking oscillator for a reciprocating electromagnetic actuator A blocking oscillator for a reciprocating electromagnetic actuator having a solenoid coil, a detection coil for generating a control signal in response to a charge in the magnetic field generated by the solenoid coil, a silicon Darlington amplifier respon... | 08/07/1984 |
| 4459935 | Phanton computer gating system A system for gating a computer to receive navigational information from the osition sensors of the periscope assembly of a submarine is disclosed. A first coil is connected as the load coil of an oscillator and is mounted in a stationary position on a subm... | 07/17/1984 |
| 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 a switching circuit through which the direction of curren... | 06/19/1984 |
| 4387306 | Vital contact checking circuit A vital contact checking circuit which senses the state of the back contact of a relay in either a dynamic or static situation. In the former, a signal is coupled from its source to a detector by a coupling device, such as a transformer, and an additional... | 06/07/1983 |
| 4371118 | Magnetic safety interlock method and apparatus for food processor Safety interlock method and apparatus employing magnetic effects for food processors having a base enclosing a motor drive, working bowl detachably mountable on the base for receiving various rotatable tools removably installable on drive means in the bow... | 02/01/1983 |
| 4349858 | Control circuit for use with an electronic guard strip A control circuit for use with an electronic guard strip for preventing collision of the strip with a moving object. A control such as a relay, is connected to at least one antenna, which antenna forms a capacitor together with a base in its ambiance. A v... | 09/14/1982 |
| 4338650 | Fail-safe relay driving A relay is activated by an A.C. signal that is supplied through two toroids, connected in series to a signal source. The signal is inductively coupled through each toroid and each toroid is controlled by a corresponding microprocessor. A voltage is applie... | 07/06/1982 |
| 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 positions. The reciprocating member shunts and unshunts a capacitor... | 06/15/1982 |
