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"I hate what they've done to my child...I would never let my own children watch it. "
Vladimir Zworykin, television pioneer ; Talking about an invention in which he played a critical role.
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| Number | Title | Issue Date |
| 7280331 | Power reconnect and voltage control In one aspect, a power connect device receives ac line voltage and provides ac load voltage to a load device. In one embodiment, the power connect device includes: a connect panel, a transformer circuit, a high voltage relay, a rectifier, and a voltage protection ci... | 10/09/2007 |
| 7218489 | High-power ultracapacitor energy storage pack and method of use An ultracapacitor energy storage cell pack includes an ultracapacitor assembly having a plurality of series connected ultracapacitors and balancing resistors, each balancing resistor connected in parallel with each ultracapacitor to automatically balance each ultrac... | 05/15/2007 |
| 7151359 | Variable reluctance generator A variable reluctance generator has phase windings and a bias winding. By controlling the excitation produced by the bias winding, the speed of the machine or the DC link, a power converter using only diodes can supply power to a DC bus. A method of operating a vari... | 12/19/2006 |
| 6958671 | Electrical contactor with positive temperature coefficient resistivity element The present invention provides an electrical contactor for connecting and disconnecting an electrical power source to an electrical device wherein the electrical power source is electrically connected to a line terminal having a line terminal electrical contact and ... | 10/25/2005 |
| 6953253 | Vehicle photosensing control system A vehicle photosensing system includes a photosensor array that is disposed within the interior cabin of the vehicle and having a field of view forward through the windshield of the vehicle. The photosensing system further providing a control for either controlling ... | 10/11/2005 |
| 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 |
| 6700767 | Temperature-based cooling fan controlling structure Temperature-based cooling fan control structure mainly including a thermistor for measuring ambient temperature, a voltage amplification system to indicate voltage needed for the cooling fan to rotate under the measured temperature, a magnetic induction s... | 03/02/2004 |
| 6639992 | Multifunction acoustic device A speaker diaphragm is supported in a frame and a voice coil is secured to the speaker diaphragm. A rotor having a central permanent magnet and a cylindrical hub provided around the central permanent magnet is rotatably supported in the frame. A motor ann... | 10/28/2003 |
| 6356424 | Electrical protection systems An electrical protection system on a power distribution side includes a control element of a series combination of a PTC device thermally coupled with a resistive device, and a relay coil coupled with relay contacts. If the relay contacts are open the onl... | 03/12/2002 |
| 6249434 | Surface mounted conduction heat sink A system and method for conducting heat from electrical devices mounted on a circuit board is disclosed. A heat sink for conducting the heat is provided that includes a pair of substantially parallel vertical legs and a horizontal member coupled between t... | 06/19/2001 |
| 6127650 | Electromagnetic switch and welder using the same A welder has an electromagnetic switch for turning on and off the power to be supplied to the welder, a control circuit for controlling the turn on and off of this switch according to a starter signal that starts the welder and self-holding circuit for se... | 10/03/2000 |
| 6072679 | Electric protection systems including PTC and relay-contact-protecting RC-diode network An electrical protection system includes a control element of a series combination of a PTC device thermally coupled with a resistive device, and a relay coil coupled with relay contacts. If the relay contacts are open the only way in which they can be cl... | 06/06/2000 |
| 5962978 | Apparatus for automatically degaussing a color picture tube in response to a power conservation mode An automatic degaussing circuit for a color picture tube (CPT) capable of automatically degaussing the CPT when a power conservation mode is released in a monitor having a power conservation function. The degaussing circuit includes a degaussing coil for ... | 10/05/1999 |
| 5886860 | Circuit breakers with PTC (Positive Temperature Coefficient resistivity A Positive Temperature Coefficient Resistivity (PTC) element has a resistivity that increases as the temperature increases. Circuit breakers having PTC elements can achieve better overload and short circuit protection than existing products. Breakers with... | 03/23/1999 |
| 5844209 | Apparatus to control the cooking temperature of foods Apparatus for control of cooking foods temperature by sensing their temperature with thermistors, which form part of a first electrical circuit that induces a magnetic flux in an electromagnet, a second electrical circuit that induces, in the electromagne... | 12/01/1998 |
| 5790355 | Control system An electric appliance control system is provided for use with an electric power unit such as an electric lawn mower. The electric appliance control system includes a battery, a selectively operable switch, a relay having first and second contacts, a contr... | 08/04/1998 |
| 5722632 | Temperature-compensated exhaust gas recirculation system An exhaust gas recirculation (EGR) system (10) includes a proportional solenoid valve (28) that regulates vacuum pressure to a vacuum-actuated EGR valve (12). The proportional solenoid valve (28) includes an inductive coil (30) that generates a magnetic f... | 03/03/1998 |
| 5241448 | Demagnetizing circuit for a color picture tube A demagnetizing circuit for a color picture tube includes a parallel combination of a relay coil and a negative temperature coefficient (NTC) resistor in series with the primary of the power supply transformer. The contact of the relay is connected into t... | 08/31/1993 |
| 5128826 | D.C. solenoid In a d.c. solenoid in which a thermistor having a positive temperature coefficient is connected in series with a main coil, a subcoil is connected in parallel with the series connection of the main coil and the thermistor, so that a large magnetic force c... | 07/07/1992 |
| 4991054 | Time-delay outdoor lighting control systems An optical lighting control, such as that used to control street lamps, delays the response of the lamps to changes of illumination while the lamps are on at night but avoids the delay in response to daylight. Thus, headlamps, flashlights, and lightning f... | 02/05/1991 |
| 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 |
| 4832583 | 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... | 05/23/1989 |
| 4800292 | Temperature sensing circuit A temperature sensing circuit including a temperature sensing element located at a medium to sense the temperature of the medium. The sensing element is a resistive element with a range of resistive values corresponding to a range of sensed temperatures. ... | 01/24/1989 |
| 4794948 | Directional control valve having an optical position indicator A solenoid operated directional control valve includes a visual position indicator assembled of rectifying bridge circuit whose DC output terminals are bridged by a series connection of a light emitting diode with a PTC resistor. In this manner, the indic... | 01/03/1989 |
| 4747009 | Air conditioner clutch control device An air conditioner clutch control device includes a resistive type temperature sensor, connected to power dividers for providing a threshold voltage and a trigger voltage for first and second comparators. Resistor type power dividers provide first and sec... | 05/24/1988 |
| 4724504 | Rapid turn-on, slow drop-out control arrangement An electrical equipment controller is provided with a delayed turn-off capability. A thermostat is in series with a control relay. The thermostat is further in parallel with the series combination of a relay latch contact and a first positive temperature ... | 02/09/1988 |
| 4638784 | Method of and apparatus for controlling vacuum modulating valve for exhaust gas recirculation control In controlling a vacuum modulating valve for EGR control, incorporating therein a temperature detecting element, a required drive signal of the vacuum modulating valve, which is obtained in accordance with operating conditions of an engine including an en... | 01/27/1987 |
| 4623798 | Thermosensitive switching circuit having comparator with open collector output A thermosensitive switching circuit includes a first voltage divider for producing a reference voltage with a predetermined constant level and a second voltage divider for producing a detection voltage signal whose level changes in response to changes in ... | 11/18/1986 |
| 4452191 | Short duration PTC resistor timer A short duration timer for use in an electronic circuit such as a diesel engine glow plug control includes a first PTC resistor energized by an electric power source and stabilized in the exponential portion of its resistance-temperature curve. A second P... | 06/05/1984 |
| 4444160 | Energization indication control for diesel glow plug An indicating lamp and a PTC thermistor are connected in series across an electric power source by an ignition switch which simultaneously actuates apparatus to intermittently energize a diesel engine glow plug. Further apparatus is effective to make and ... | 04/24/1984 |
| 4321447 | Energization circuit for a microwave oven An energization circuit for a microwave oven employs a PTC thermistor to eliminate high transient current surges resulting from energization and deenergization of induction elements therein to provide circuit protection both during oven start and operatio... | 03/23/1982 |
| 4320309 | Oscillatory circuit utilizing PTC resistor A control circuit for producing a repetitive closed-circuit, open-circuit condition between an electrical power source, such as a battery, and an electrical load comprises a positive temperature coefficient resistor in series with a relay coil. The PTC re... | 03/16/1982 |
| 4234904 | Process and device for the protection of electrical energy supply systems controlled by means of audio-frequency A process for the protection of electrical systems upon return of power after power interruptions, through the immediate disconnection of secondary consuming units by an audio-frequency control receiver, and the subsequent reconnection thereof in timed se... | 11/18/1980 |
| 4219861 | Protector circuit for solenoid operator A protector means is provided to prevent thermal destruction of a solenoid adapted for very short duration energization at currents far in excess of the continuous current carrying capability of the solenoid. The protector means includes a positive temper... | 08/26/1980 |
| 4104692 | Device for detecting abnormal temperature in fixer A device for detecting an abnormal temperature in a fixer, including a pulse generation controller capable of detecting the temperature in the fixer, comparing it with a predetermined reference temperature, and generating pulses continuously while the fix... | 08/01/1978 |
| 4060123 | Energy saving temperature control apparatus An improved energy saving control apparatus particularly designed for providing energy saving control of individual room heating and cooling units in direct response to the active occupancy status of the room. Switching means selectively interrupt energiz... | 11/29/1977 |
| 4055296 | Electronic temperature control system for thermostatic control An electronic temperature control system utilizes a circuit having two main terminals for connection to a low voltage relay control system of the type generally used in residential heating or cooling systems without the need for an auxiliary source of pow... | 10/25/1977 |
| 3982163 | Temperature sensitive electronic switching arrangements A temperature sensitive electronic switching arrangement has a casing with two terminals, one of which may be constituted by the casing. In the casing is a positive temperature coefficient resistor and associated trigger circuit. As the temperature rises,... | 09/21/1976 |
| 3947733 | Control circuit A temperature-actuated circuit for controlling the application of an electronic circuit. In a typical application, the control circuit shunts a circuit which effects enrichment of the fuel mixture for the cold-starting of internal combustion engines. In a... | 03/30/1976 |
| 3939403 | Device for maintaining constant the temperature of a coil fed by an A.C. current source A measuring coil comprises two windings, each being formed by winding simultaneously two insulated wires having the same size, the two wires of each winding extending side by side. The windings formed by the single turns of the wires in each winding are i... | 02/17/1976 |
