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| Number | Title | Issue Date |
| 7911758 | Low power solenoid control system and method A low power solenoid control circuit including a power source in series with a sensing element and a first diode, an inductor to actuate a valve, an energy storage device to store and discharge energy into the inductor, diodes to control current flow, and switches a... | 03/22/2011 |
| 7483254 | Control circuit of a bistable permanent magnet operating mechanism The present invention relates to an automatic controlled operating mechanism, in particular, relates to a control circuit of a bistable permanent magnet operating mechanism. The control circuit comprises a permanent magnet operating mechanism and a pulse signal cont... | 01/27/2009 |
| 7358626 | Two-wire power and communications for irrigation systems A large number of irrigation system devices connected to a common two-wire cable can be powered and individually controlled from a central location by transmitting over the cable DC pulses of alternating polarity. Control information is conveyed by transmitting a co... | 04/15/2008 |
| 7348690 | Preventing unsafe operation by monitoring switching means An electronic control that monitors the switching means used to operate transducers to detect conditions that can cause improper transducer operation. In the application the unenergized state of the transducer is always safe. Should a switch in the transducer circui... | 03/25/2008 |
| 7313854 | Method of manufacturing a tactile sensor A method of manufacturing a tactile sensor, which is capable of implementing a wide range of senses, including sensing contact pressure (vertical force and horizontal force) with an external object and heat caused by the contact pressure, comprises forming a side bl... | 01/01/2008 |
| 7262519 | Actuator unit with at least two actuators and a secure control unit In order to provide a bearing for an already prepositioned switching shaft, fitted with coupling levers, of a low-voltage circuit breaker in the region where the switching forces act, a bearing assembly is provided. The bearing assembly includes a bearing body which... | 08/28/2007 |
| 7216421 | Stamping machine for mounting retention frame of heat sink to motherboard A stamping machine for mounting a retention frame of heat sink (510) to a motherboard (500) includes a machine body (100), an adjusting device (200), and a controlling unit (300). The machine body comprises a support plane (110 | 05/15/2007 |
| 7146257 | Electric power plant general control system An electric power plant general control system for controlling power generating units. A generating unit (GU2) can operate part of the auxiliaries based on an automation command outputted from a unit computer (UC2) having a sequence function po... | 12/05/2006 |
| 7141944 | Device and method for controlling an electrical motor mounted on the crossarm of a bridge circuit Device for controling an electrical motor mounted on the crossarm of a bridge circuit whose motor current is controllable with semiconductor components formed in a first bridge branch by an electromagnetic switching device and in a second bridge branch by two serial... | 11/28/2006 |
| 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 |
| 6971346 | System for controlling electromechanical valves in an engine A system for electronically actuating valves in an engine. The system includes a first voltage source, a second voltage source, and plural valve actuator subsystems coupled between the first voltage source and the second voltage source. Each valve actuator subsystem... | 12/06/2005 |
| 6948461 | Electromagnetic valve actuation A system and method for controlling an internal combustion engine provide valve actuation that selectively couples an energy storage device to a launching coil to recover energy stored in the magnetic field and valve spring of the launching coil, decouples the energ... | 09/27/2005 |
| 6937450 | Grounded isolation system A system for electrically isolating and indicating electrical isolation of a machine including a plurality of relays which cooperate to, when electrical isolation is selected, ground voltage input lines to the machine thereby ensuring that no power is provided to th... | 08/30/2005 |
| 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 |
| 6785111 | Electric charge detector Electrostatic discharge can damage electronic equipment. It has been known to start a fire when it occurs when a motor vehicle's gasoline tank is being filled. A device for detecting, alarming, and/or neutralizing an electrostatic charge can help avoid these problem... | 08/31/2004 |
| 6784571 | Electronic safety switching device and method The present invention relates to an electronic safety switching device having at least a first and a second signal processing channel. The channels can be supplied with input signals for signal processing, and they provide redundantly processed output signals. Accor... | 08/31/2004 |
| 6611416 | Safety relay circuit for large power contactors An apparatus and method for monitoring main contacts and auxiliary contacts of a power contactor is disclosed. The apparatus includes four circuits, the first of which has an on state in which a coil of the contactor is energized, and an off state. The fi... | 08/26/2003 |
| 6515586 | Tactile tracking systems and methods A tactile sensory system comprising a floor covering integrated with a tactile sensory layer to form a tactile sensory surface is described. The tactile sensory layer has a plurality of sensors. The system also comprises a controller connected to the tact... | 02/04/2003 |
| 6507468 | Controller for heat engineering installations A controller has two shunt lines connected in parallel with safety relays. For testing their switching capability, the safety relays are reversed to their idle positions and the change in voltage is monitored on their idle contacts. If voltage is missing,... | 01/14/2003 |
| 6487062 | Relay circuit for controlling an inductive load An electric circuit is provided for an inductive load including a first relay and a second relay for connecting the inductive load with a power supply. Both relays are connected to the inductive load so as to be activated when the voltage drop across the ... | 11/26/2002 |
| 6483688 | Control circuit for solenoid valve assembly A circuit for controlling a valve assembly in applications where electrical isolation of the two control signal supply lines is required to prevent damage of control circuits caused by a reverse polarity feedback signal or other transient signal. The circ... | 11/19/2002 |
| 6351366 | Battery powered remote switch controller An inexpensive battery-powered switch or irrigation valve controller designed to conserve the life of both the low voltage battery source which operates the processing circuitry of the controller, as well as the high voltage battery source which operates ... | 02/26/2002 |
| 6301091 | Relay configuration A safety relay configuration for linking a power source to a device to be powered via at least one output wherein output contacts all have to be closed to provide power to the device, the configuration including first and second three contact relays or fo... | 10/09/2001 |
| 6236553 | Safety relay A safety relay for supervising and ensuring safe operation of a machine industrial process and corresponding safety devices and actuators. The safety relay has at least one input, which is monitored for short circuits and open circuits, for connection to ... | 05/22/2001 |
| 6208042 | Anti-reactivation safety device An anti-reactivation safety device for an electrical load-bearing device, including a power input line for delivering current from a power source across the anti-reactivation device to the load-bearing device. A current transfer switch positioned along th... | 03/27/2001 |
| 6158618 | Control circuit for multi-product fuel dispenser A control circuit array for controlling operation of a plurality of multi-product fuel dispensers ("MPDs") in response to control inputs from a control input source. The control circuit array includes an electric power source, switches for fuel grade sele... | 12/12/2000 |
| 6142501 | Recreational vehicle jack remote control The recreational vehicle jack remote control is for use with a recreational vehicle having a pair of support jacks which are raised and lowered by an electric motor connected to the jacks. The electric motor is controlled by a normally open, double-pole, ... | 11/07/2000 |
| 6081292 | Grappler guidance system for a gantry crane In a gantry crane having a movable grappler adapted for lifting standard containers, a system is provided to aid in positioning the grappler relative to the container. The grappler is equipped with at least two corner video devices located near corners of... | 06/27/2000 |
| 6061226 | Relay circuit with cyclical controlled capacitor There is proposed a circuit for operation of at least one relay having an OFF-position and an ON-position, wherein the relay assumes the OFF-position in the event of a component failure of any element of the circuit. In the ON-position of the relay a capa... | 05/09/2000 |
| 6060796 | Protective circuit The invention concerns a protective circuit for monitoring an object which can move between two end positions, for example a displaceable safety door (1) of an electric machine. This type of protective circuit has a very simple and distinct design and can... | 05/09/2000 |
| 6050281 | Fail-safe gas valve system with solid-state drive circuit A solid-state fail safe gas valve system in which first and second gas valves are arranged in series in a gas passageway, the valves being actuatable by first and second solenoid operators respectively, the second operator requiring a voltage greater than... | 04/18/2000 |
| 6028760 | Resonant power converter for energizing a coil A pulse generator is provided for energizing a coil with period bipolar current pulses for the purposes of airborne prospecting. The pulses have a generally square waveform, and the pulse generator includes a resonant DC to AC converter circuit including ... | 02/22/2000 |
| 6002565 | Fault current safety switch A fault current switch with a total current converter (W), whose primary circuit (1) consists of the incoming and outgoing lines of the circuit to be monitored, and whose secondary winding (2) is connected with a test circuit (P), with an electromagnetic ... | 12/14/1999 |
| 5953197 | Method for operating a replay arrangement to reduce noise due to acceleration A method is described for operating a relay arrangement having a magnetic circuit comprising two excitation core each arranged on a core, a yoke and an unstably mounted armature, two contact springs that can be operated by the unstably mounted armature, t... | 09/14/1999 |
| 5946182 | Power supply circuit for an electromagnetic coil having low DC and high AC voltage supply Power supply circuit for a single-winding electromagnet coil (11) comprising a low voltage DC power supply (20) and a high voltage AC power supply (30) both connected to the terminals of the winding (11), together with a switching apparatus (40) connected... | 08/31/1999 |
| 5941916 | Driving apparatus with a function for detecting an electric current and method for detecting its electric current A driving apparatus is provided including a current detecting device for detecting electric current flowing through elements such as a sensor, a heater and an actuator, and switching devices for controlling electric current through the elements. The numbe... | 08/24/1999 |
| 5940262 | Control circuit for an electromagnetic device for controlling an electromagnetic fuel control valve A control circuit for an electromagnetically operable fuel control valve of a vehicle engine includes a tank capacitor which upon closure of first and second controllable switches supplies current to the winding of the valve to achieve a high rate of rise... | 08/17/1999 |
| 5936828 | 110 volt to 200 volt adaptor A voltage adaptor outputs 208-220 volts at an outlet and receives two 110 volt inputs. The adaptor has first and second male input connectors that can mate with respective power connectors and a control circuit interconnecting the male connectors to the o... | 08/10/1999 |
| 5912795 | Circuit reset lockout A reset lockout for a control device which functions to control and monitor the essentially simultaneous energization of two electromagnets (61, 62) in response to a respective electric signal (S1, S2) applied to said electromagnets essentially simultaneo... | 06/15/1999 |
| 5907465 | Circuit for energizing EAS marker deactivation device with DC pulses of alternating polarity A device for deactivating magnetomechanical EAS markers includes a storage capacitor and a coil for generating a deactivation field. A bridge arrangement of four switches interconnects the coil with the storage capacitor and with circuit ground. The switc... | 05/25/1999 |
