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| Number | Title | Issue Date |
| 7259407 | Isolated HF-control SCR switch A vertical SCR switch to be controlled by a high-frequency signal having at least four main alternated layers. The switch includes a gate terminal and a gate reference terminal connected via integrated capacitors to corresponding areas. In the case of a thyristor, h... | 08/21/2007 |
| 7227310 | Method and devices for controlling loads connected to a power line The present invention is related to a method and devices for controlling at least one load connected to an AC power line. The method is based on the introduction of interruptions in the line voltage, which correspond to data being sent. The method centers on interru... | 06/05/2007 |
| 7038503 | Driving circuit for electrical nailing gun A driving circuit for electrical nailing gun is disclosed to include a capacitive charging/discharging unit formed of a first resistor, a first diode, and a capacitor connected in series and connected with two opposite ends thereof to the positive and negative poles... | 05/02/2006 |
| 6590349 | Bidirectional flip-flop A bidirectional switch, including a first bidirectional switch between two power terminals of the switch, a low-voltage storage element between a first power terminal and a control terminal of the switch, and a control stage adapted to cause, upon each ha... | 07/08/2003 |
| 6480056 | Network of triacs with gates referenced with respect to a common opposite face electrode The present invention relates to a triac network wherein each triac includes an N-type semiconductor substrate, containing a first thyristor comprised of NPNP regions and a second thyristor comprised of PNPN regions, and surrounded with a P-type deep diff... | 11/12/2002 |
| 6466064 | Frequency multiplier device and frequency multiplier circuit It is intended to provide a compact circuit configuration used for a frequency multiplier device, suitable to selectively output among a plurality of multiplied frequencies, with less power consumption. The frequency multiplier device uses an input freque... | 10/15/2002 |
| 6373319 | Bistable high-voltage bidirectional switch A high-voltage bidirectional switch, including a high-voltage bidirectional switching element, and circuitry for making the switching element bistable and controllable by, at most, two low-voltage pulse signals.... | 04/16/2002 |
| 5686857 | Zero-crossing triac and method A triac (100) utilizes an FET (107) to inhibit firing of a transistor (112) that forms a portion of the SCR of the triac (100). A DMOS transistor (106) is used to supply a substantially constant bias current to the transistor (107) in order to facilitate ... | 11/11/1997 |
| 5391997 | Optically isolated N-channel MOSFET driver An optically isolated N-channel MOSFET driver turns on a MOSFET device in response to an optical input signal to drive a load. The turn-on time of the MOSFET is enhanced by a current boost circuit. As the MOSFET transcends to an on state and delivers curr... | 02/21/1995 |
| 5338991 | High power solid state relay with input presence and polarity indication A solid state relay having an input circuit and a triac Darlington circuit coupled by a phototriac circuit. The input circuit having a bipolar indicator lamp for identifying the polarity and presence of an input voltage. The phototriac circuit and the tri... | 08/16/1994 |
| 5323062 | System for triac trigger control in combination with a sensing element A trigger control circuit of the kind wherein a load is supplied via a triac with current from an AC voltage supply source under the control of a triac control means in combination with a sensing element. In previous circuits the sensing element is energi... | 06/21/1994 |
| 5216303 | Double solid state relay A new double solid state relay comprising two sets of solid state relays and being constructed in such a way that it can turn on and off a circuit with a voltage very close to zero. It is the only solid type double solid state relay in the world and is sa... | 06/01/1993 |
| 5036234 | Control circuit for triacs A direct current voltage controlled triggering circuit for triacs connected via a consumer resistor to an alternating current supply voltage uses the controllable channel resistance of a field effect rransistor to distribute loading current among a series... | 07/30/1991 |
| 4991049 | Anti-short-cycle circuit A protective time delay delay circuit delays energization to an electric load until a predetermined time has elapsed from a previous deenergization. A transistor has its emitter connected to an ac conductor and has its base coupled to an RC timing circuit... | 02/05/1991 |
| 4803418 | In-line electrical switch for AC power supply A proximity switch e.g. for a domestic a.c. supply is connected in-line e.g. in the live line of the supply between live and switch live terminals. No direct connection is made to the neutral line. Switching is performed by a triac T which receives a gate... | 02/07/1989 |
| 4719446 | Remote control for combined ceiling fan and light fixture A remote control system for a combined ceiling fan and light fixture for use with existing AC current house wiring between a wall switch and a ceiling fixture including a wall control for electrical substitution of the wall switch and with the wall contro... | 01/12/1988 |
| 4678985 | Two-terminal line-powered control circuit A two-terminal line-powered control circuit is disclosed in which a triac is used to switch AC power to a load. When the triac is not conducting, a portion of the voltage appearing across it is rectified and filtered and used to supply power to a radio co... | 07/07/1987 |
| 4659941 | Power sensing device A power sensing device is disclosed for use with an electrical alternating current (AC) power source, a primary load, and a plurality of secondary loads. The power sensing device detects when the primary load is turned on, and automatically supplies power... | 04/21/1987 |
| 4658129 | Photoelectric control device which detects changes in light intensity A photoelectric control device having a photoelectric sensing unit for delivering an output voltage in response to changes of the intensity of light, the output voltage being applied to a capacitor for operating a SCR. When the output voltage reaches a pr... | 04/14/1987 |
| 4609865 | Grounding system test apparatus The apparatus is used in conjunction with a power center or distribution box of a multi-phase trailing cable resistance grounded power system in coal mines and the like. It provides from phase voltage an adjustable low voltage current source for adjusting... | 09/02/1986 |
| 4504778 | Self-powered, self-regulated, electronic ac control system A system of controlling the operation of an AC load with a switch placed in series with the load, which switch is itself operated by dc control logic powered by power loss experienced by the switch which the logic controls. Numerous elements in the contro... | 03/12/1985 |
| 4471372 | FET Controlled Triac Bidirectional thyristor or Triac, including a semiconductor body, first and second antiparallel-connected thyristor sections integrated in the semiconductor body, each of the thyristor sections having an anode side, a cathode side, an emitter zone on the ... | 09/11/1984 |
| 4464582 | Water-safe hair dryer circuit An automatic power shut-off circuit for a wide variety of electrical appliances, such as hand-held hair dryers, razors, irons, hair curlers, etc. which pose a risk of electrocution when used around water. Thus, said circuit avoids the risk of dangerous sh... | 08/07/1984 |
| 4453123 | System for providing a firing signal to an electrical power switch A system for providing a firing signal to an electrical power switch at a selectable instant during each cycle of a periodic waveform electric power source. A comparator receives a signal varying monotonically with time and a control voltage as inputs, an... | 06/05/1984 |
| 4443712 | Switch device for connecting AC power source to load In a switch device for connecting an AC power source to a load, a phase detector circuit detects the phase of a peak-volt point of the AC voltage. In response to the phase detector circuit, a trigger circuit triggers a semiconductor switching element into... | 04/17/1984 |
| 4412140 | Circuit for reducing current to light emitting diode of optically coupled driver A circuit is disclosed for reducing the average light emitting diode (LED) current required to latch an output triac. A ring oscillator coupled to a logic means provides a current pulse to the LED that triggers the optically coupled output triac early dur... | 10/25/1983 |
| 4394957 | Sensor control device A sensor control device for controlling the operation of a device such as an air blower, including a sensor capable of sensing a change in the environment from a predetermined level and providing a signal corresponding to the change and a logic means capa... | 07/26/1983 |
| 4382192 | Self-quenching circuit A switch, when closed, provides a low impedance conduction path for power being applied to a load and for the operating potential for a control circuit. The control circuit includes timing circuitry which produces a timing signal, a given time after the s... | 05/03/1983 |
| 4380114 | Method of making a semiconductor switching device A triac device includes a first silicon chip having regions of alternate conductivity type disposed in a PN-junction forming relationship which defines a center-fired triac. A second silicon chip having regions defining a diac is bonded to the gate region... | 04/19/1983 |
| 4376253 | Timed switch for an AC load The timed AC switch comprises a manual on-off switch in series with bidirectional semiconductor switch, such as a triac, for connection in a loop with an AC source and a load which would generally be incandescent or fluorescent lamps. The semiconductor sw... | 03/08/1983 |
| 4369354 | Arrangement for monitoring the operation of a heating element A heating arrangement in a fixing station of a printing device has its operation monitored by an arrangement in which a measuring element is disposed in series with the heating element and a switch element. The measuring element is traversed by the heatin... | 01/18/1983 |
| 4366678 | Temperature control apparatus for refrigerating machine A temperature control apparatus for use in a refrigerating machine, wherein an a.c. control element and the solenoid coil of a holding type solenoid are connected in series in an a.c. power circuit, the holding type solenoid serving to actuate a damper fo... | 01/04/1983 |
| 4360743 | Solid state control device for gradually turning on and off an electrical load A solid state control device is disclosed for gradually controlling the turn on and turn off of a light bulb. The light bulb is connected to an AC power source through a full wave rectifier having a semiconductor switching circuit connected across it whic... | 11/23/1982 |
| 4360740 | Low voltage switching circuit for controlling a high voltage electrical load Solid state high voltage electronic switching means, preferably a triac, is connected in series with a high voltage load, for instance, a light, across a high voltage alternating current power source. Contacts of a relay having a low voltage coil are oper... | 11/23/1982 |
| 4355343 | Semiconductor switch failure control circuit A bidirectional semiconductor switch such as a Triac in the usual failure mode, wherein the device conducts continuously in only one direction, has a storage circuit in series intermediate the triac and load. The storage circuit may comprise a single capa... | 10/19/1982 |
| 4355242 | Voltage regulating system A voltage regulating or control system employing a triac for controlling the power supplied to a load from an alternating current (a.c.) voltage source uses an oscillator as a phase controller to initiate a first switching pulse in each half-cycle of the ... | 10/19/1982 |
| 4338546 | Liquid level detection circuit for control of liquid level responsive device A liquid level presence detection circuit includes a selectively gatable TRIAC serially connected with a load and triggered into conduction by twin sensitive-gate SCR's connected anode-to-cathode with the gates of the SCR's connected to voltage divider ci... | 07/06/1982 |
| 4265394 | Flue damper control system In a flue damper control system, a thermistor 64 responsive to flue temperatures upstream of the damper 12 is incorporated in a trigger circuit for a triac 52 which controls energization and deenergization of the damper motor 17, the damper motor being fu... | 05/05/1981 |
| 4239986 | Power control arrangement and control circuit especially suitable for use therewith An arrangement for controlling power during any given half cycle of AC power is disclosed herein and includes a gated switching device connected across an AC voltage supply, and a charging capacitor also connected with the supply voltage and adapted to di... | 12/16/1980 |
| 4238689 | Vacuum cleaner control system A vacuum cleaner power and control system wherein a single pair of conductors is employed to transmit electrical power to a remote motor driven agitator and to selectively energize the blower motor of the cleaner. Photo electric means is employed to sense... | 12/09/1980 |
