Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 7352755 | Network interface card (NIC) with phase lock rise time control generating circuit A Network Interface Card (NIC) for attaching data terminal equipment to a communications network. The NIC includes a Phase Lock Loop (PLL) with a master delay structure that is operatively coupled to at least one delay line structure. The PLL generates control pulse... | 04/01/2008 |
| 7106605 | DC converter circuit with overshoot protection A DC-DC converter comprises an input circuit that stores inductive energy that includes a first switch that releases the stored inductive energy. A transformer includes a primary winding that communicates with the input circuit and a secondary winding. An output cir... | 09/12/2006 |
| 7068016 | One cycle control PFC boost converter integrated circuit with inrush current limiting, fan motor speed control and housekeeping power supply controller A power factor corrected boost converter circuit includes a rectifier connectable to an ac input and having a rectified dc output provided across a dc bus, an inductor having first and second terminals connected in one leg of the dc bus, an integrated circuit compri... | 06/27/2006 |
| 7054411 | Multichannel contactless power transfer system for a computed tomography system A multichannel, contactless power transfer system includes a primary power inverter disposed on a stationary side of the system, and an auxiliary power inverter disposed on the stationary side of the system. A rotary transformer has a primary side thereof disposed o... | 05/30/2006 |
| 6974560 | Electro-kinetic air transporter and conditioner device with enhanced anti-microorganism capability An electro-kinetic air conditioner for removing particulates from the air creates an airflow using no moving parts. The airflow is subjected to UV radiation from a germicidal lamp within the device. The conditioner includes an ion generator that has an electrode ass... | 12/13/2005 |
| 6953556 | Air conditioner devices An air conditioner includes an ion generator that provides ions and safe amounts of ozone. The ion generator includes a high voltage generator that provides a voltage potential difference between first and second electrode arrays. At least one of the first and secon... | 10/11/2005 |
| 6911186 | Electro-kinetic air transporter and conditioner device with enhanced housing configuration and enhanced anti-microorganism capability An electro-kinetic air conditioner for removing particulates from the air creates an airflow using no moving parts. The airflow is subjected to UV radiation from a germicidal lamp within the device. The conditioner includes an ion generator that has an electrode ass... | 06/28/2005 |
| 6908501 | Electrode self-cleaning mechanism for air conditioner devices An air conditioner with a cleaning member having an opening, through which a wire-like electrode passes. The member is moved along the wire to frictionally clean the wire-like electrode when a collector electrode array is moved. A lifting arm is mounted to the colle... | 06/21/2005 |
| 6694438 | System for controlling the delivery of power to DC computer components Method and apparatus are disclosed for controlling the delivery of power to DC components such as computer components, microprocessors or the like. Designs of voltage regulation modules are presented which are appropriate for faster components, lower volt... | 02/17/2004 |
| 6614670 | Isolation circuit for providing isolation from a switch of a welding power supply A circuit for controlling the welding power of a welding power supply includes a control circuit, a switch, and an isolation circuit. The control circuit is configured to generate a command signal. The isolation circuit has a flyback transformer and is co... | 09/02/2003 |
| 6366058 | Capacitor power supply unit A capacitor power supply unit for generating an auxiliary direct voltage supply from a main alternating voltage supply for powering an electrical consumer includes a storage capacitor and a charging capacitor. The storage capacitor provides an auxiliary d... | 04/02/2002 |
| 6061252 | Switching power supply device A switching power supply device has a configuration in which a series combination of a first switching circuit and an input power source is connected in series with a series combination of a primary winding of a transformer and an inductor, a series combi... | 05/09/2000 |
| 5760491 | Method and circuit for disconnecting a transformer in dependence on whether a load connected thereto requires power, or not A transformer, typically a miniature transformer, to provide low-voltage power between, usually, 2 to 12 V from a power network has an auxiliary winding (6) inductively coupled to the core (9) of the transformer. A reference signal is provided from the po... | 06/02/1998 |
| 5539631 | Converter circuits using a silicon controlled rectifier A voltage converter circuit uses a silicon-controlled rectifier for converting input voltage to selected levels of output voltage. The silicon-controlled rectifier is connected in a circuit including a capacitor which oscillates between charging and disch... | 07/23/1996 |
| 5450310 | Control system for power converter with prevention of DC magnetization in the transformer A control system for a power converter which is composed of a plurality of self-turn-off devices and is connected to an outer system through a transformer provided with a core. The control system includes an output voltage instruction value generating cir... | 09/12/1995 |
| 5434770 | High voltage power supply with modular series resonant inverters A relatively small and compact high voltage, high current power supply for a laser utilizes a plurality of modules containing series resonant half bridge inverters. A pair of reverse conducting thyristors are incorporated in each series resonant inverter ... | 07/18/1995 |
| 5311418 | HVDC DC to DC converter with commutating transformer A DC/DC power transformer is provided which is an arrangement for direct transformation of high electric power from one DC voltage level to another DC voltage level without an intermediate AC voltage network. The DC voltage is today basically used for tra... | 05/10/1994 |
| 5027264 | Power conversion apparatus for DC/DC conversion using dual active bridges A DC/DC power converter suitable for high power applications has an input converter which converts the DC input voltage to an AC voltage and supplies this voltage to a transformer. The output of the transformer is provided to an output converter which con... | 06/25/1991 |
| 4710862 | Inverter An inverter comprises a pair of reactors connected in series between a positive arm element and a negative arm element, snubbers each connected in parallel to respective arm elements, and a feedback circuit for transferring electrical energy stored in the... | 12/01/1987 |
| 4692667 | Parallel-resonant bridge-inverter fluorescent lamp ballast Center-tapped DC power to a self-oscillating full-bridge inverter-type fluorescent lamp ballast is obtained from a regular power line by way of a voltage doubler. The DC power is supplied to the inverter through an inductor means having two separate windi... | 09/08/1987 |
| 4628427 | D.C. impulse arc welder employing thyristors Apparatus for producing an impulse welding current which can be used in shielded-arc welding. The apparatus includes a thyristor connector in a series circuit to a primary winding of an impulse transformer and a second thyristor and a compacitor, the seco... | 12/09/1986 |
| 4611267 | Snubber arrangements with energy recovery for power converters using self-extinguishing devices Energy trapped in the snubbers connected to a dc-ac power converter is more efficiently restored to the dc source by means of an energy recovery transformer with a reset circuit branch for improving the reset of the transformer following a period of energ... | 09/09/1986 |
| 4600411 | Pulsed power supply for an electrostatic precipitator A method and apparatus for generating a supply of pulsed power to an electrostatic precipitator where a residual collection field is maintained on the electrodes during interpulse periods while, in addition, high voltage pulses in excess of the residual a... | 07/15/1986 |
| 4581692 | Direct current voltage converter apparatus A DC voltage converter apparatus is provided to convert a fluctuating input DC voltage into an isolated and regulated output DC voltage by operation of a first switch device for charging a capacitor through one primary winding of a transformer and a secon... | 04/08/1986 |
| 4514795 | High-voltage generator, notably for an X-ray tube The invention relates to a high-voltage generator for supplying two different output voltages or output currents, particularly for X-ray tubes whose anode current deviates from the cathode current. Symmetrical output voltages can be obtained during operat... | 04/30/1985 |
| 4458306 | High amplitude, pulsed current plating system An industrial plating system operative from a relatively high voltage, 60 Hz, three phase a-c source for providing a relatively low voltage pulsed d-c for delivering currents above around 1,000 amperes to plating load and including amplitudes of 3,000 to ... | 07/03/1984 |
| 4409647 | Power converter using a resonant circuit A power converter which converts alternating current (AC) utility power or direct current (DC) power to any DC output voltage by use of at least one switch and a resonant circuit resulting in power conversion by means of sinusoidal waveshapes. The resonan... | 10/11/1983 |
| 4404622 | Stabilized power supply A stabilized power supply which is particularly suitable for use at very high voltages derives its energy from a resonant inverter feeding a transformer and rectifier. The power supply is intended to be operated in a pulsed mode with the generation of eac... | 09/13/1983 |
| 4386395 | Power supply for electrostatic apparatus A power supply for electrostatic apparatus provides a high voltage output. The high voltage output is provided by the half wave rectification and filtering of a pulse signal from a secondary winding of a high voltage pulse transformer. The primary winding... | 05/31/1983 |
| 4346431 | Field controlled thyristor switching power supply A field controlled thyristor or a field terminated diode is used in a gate assisted turn off mode in a resonant circuit commutated switching dc/dc converter to convert power from one voltage level to another voltage level. A diode allows energy trapped in... | 08/24/1982 |
| 4333140 | Pulse-controlled D-C converter with inductive load A D-C voltage converter for controlling the voltage at an inductive load. The circuit is provided with a pulse transformer having first and second primary windings, a secondary winding, and a demagnetizing winding. The second primary winding receives a D-... | 06/01/1982 |
| 4306282 | Pulse-controlled D-C converter with capacitive load A voltage converter circuit for providing electrical energy to a capacitive load, the converter circuit having a pulse transformer having primary and secondary circuits. Pulse signals are provided in the primary circuit by thyristor devices. The thyristor... | 12/15/1981 |
| 4272716 | Device for simulating the operation of an accumulator battery, in particular a traction battery for an electric vehicle This device comprises a rectifier-inverter supplied with current by the mains and adapted to deliver a charging current to the battery in the course of the charging periods of the battery and to restore to the mains the discharge current of the battery in... | 06/09/1981 |
| 4245287 | Method of controlling switching of a multiphase inductor-converter bridge In an inductor-convertor circuit for transferring electrical energy between a storage coil and a load coil using a storage thyristor bridge, a load thyristor bridge, and a set of commutating capacitors, operation is improved by a method of changing the ra... | 01/13/1981 |
| 4217633 | Solar cell system having alternating current output A monolithie multijunction solar cell is modified by fabricating an integrated circuit inverter on the back of the cell to produce a device capable of generating an alternating current output. In another embodiment, integrated circuit power conditioning e... | 08/12/1980 |
| 4180767 | Closed-loop regulating and overhauling load energy dissipating chopper type current control system for D.C. Motors A "chopper" type armature current control system for a D.C. motor when connected across the output of a rectifier, A.C. to D.C. type supply source that is characterized by having closed-loop regulating control, and having overhauling load energy dissipati... | 12/25/1979 |
| 4173779 | Single-pole commutation circuit A commutation circuit for thyristors alternately turned ON by pulse width modulation (PWM) for the generation of a fundamental sine wave is characterized by two separate primary windings associated with respective positive and negative thyristors with a c... | 11/06/1979 |
| 4152759 | Frequency converter A frequency converter of the series-capacitor type is made substantially insensitive to changes in output load by providing the same with means for limiting the voltage across the transformer and load capacitor or capacitors thereof to a pre-determined va... | 05/01/1979 |
| 4146920 | Pre-charge circuit for aux-comm inverter An input rectifier supplies d-c energy for an auxiliary-commutated inverter. A logic circuit provides gating signals for the semiconductor switches in the input rectifier circuit and in the inverter circuit. A pre-charge circuit provides an independent pa... | 03/27/1979 |
| 4143414 | Three phase AC to DC voltage converter with power line harmonic current reduction A three phase AC to DC voltage converter includes separate single phase AC to DC converters for each phase of a three phase source with the DC voltage output of the three converters paralleled and controlled to provide necessary regulation. Each of the si... | 03/06/1979 |
