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A fork with timer for providing a cue to a user after an elapsed period of time for indicating that another bite of food using the fork may be taken.
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| Number | Title | Issue Date |
| 7345449 | Method of rotating a polyphase motor at less than rated speed A polyphase AC induction motor is connected to a power supply through a soft starter having three sets of inverse parallel connected silicon controlled rectifiers with each set corresponding to one particular phase. Low speed starting and operation of the motor can ... | 03/18/2008 |
| 7339331 | Dimmer circuit with improved ripple control A dimmer circuit arrangement is disclosed including a second control circuit for controlling the operation of a triac for delivering current to a load, and a first control circuit for controlling the operation of an IGBT power semiconductor switch for controlling th... | 03/04/2008 |
| 7291939 | Two wire touch sensor interface A touch sensor interfaces with a control system or controlled device using two wires. The output of the touch sensor controls an output switch. ... | 11/06/2007 |
| 7193404 | Load control circuit and method for achieving reduced acoustic noise A load control circuit having first and second terminals for connection in series with a controlled load comprises a bidirectional semiconductor switch for switching at least a portion of both positive and negative half cycles of an alternating current source wavefo... | 03/20/2007 |
| 7180250 | Triac-based, low voltage AC dimmer A two-wire triac-based low voltage AC dimmer adapted for configuration in series with a typically incandescent lighting load. An external step-down transformer provides a source of low AC voltage, and a separate, electrically isoated loop circuit utilizing a step-up... | 02/20/2007 |
| 7078826 | Hybrid gas turbine engine starter-generator A rotating electrical machine, such as an aircraft starter-generator, that may be operated in either a DC motor mode or an AC generator mode. The machine includes a conventionally wound main stator that is selectively configurable as a multi-pole AC stator and a mul... | 07/18/2006 |
| 7078885 | DC-DC CMOS converter A DC—DC CMOS converter including when the supply voltage is low, the current limit is automatically reduced to the maximum possible value that maintains the comparator operative, rather than simply switching off the converter. ... | 07/18/2006 |
| 6979979 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 12/27/2005 |
| 6914350 | Switching arrangement A solid state switching arrangement includes a transmission line which acts as a primary transformer loop and acts with secondary windings carried by switching modules to apply triggering signals to the switches. The arrangement may include greater than sixty module... | 07/05/2005 |
| 6909263 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 06/21/2005 |
| 6903532 | Method and apparatus for starting an induction motor A starting circuit for an induction motor is provided whereby a stationary rotor flux is established then a stored charge supplied to a motor winding in order to provide a starting torque. Before applying a mains power supply to the motor after the starting torque h... | 06/07/2005 |
| 5668496 | Circuit arrangement for limiting the current to be switched of an electrical load A circuit arrangement for limiting the current to be switched of an electrical load, with the power input of the electrical load being controlled by means of a Triac, said Triac being connected in series with the electrical load, with a Diac being connect... | 09/16/1997 |
| 5635827 | Power control system A power control system in a DIN rail mount assembly for switching power in a low cost, compact, and solid state for controlling electric heaters. The system can be used for single phase, three phase-two leg, and three phase-three leg. Current switching ca... | 06/03/1997 |
| 5309084 | Electronic switch with on/off fading The present invention provides a electronic switch suitable for fading on/off control of electrical equipment like lamps and motors. The main circuit comprises a rectifier bridge circuit and a thyristor. A control circuit includes a fast discharging synch... | 05/03/1994 |
| 4982306 | Method of limiting starting current in a DC converter and device for performing the method In a method and device for limiting the starting current of a DC converter, at least one buffer capacitor is initially charged through a load resistor. The current going through the load resistor is measured with a monitor. The monitor switches on a DC co... | 01/01/1991 |
| 4785390 | Instantaneous failure compensation circuit A compensation circuit includes a circuit for monitoring the current delivered to a load and for producing a switching signal whenever a current spike is detected. A control signal representative of the desired voltage across the load is produced. A power... | 11/15/1988 |
| 4697229 | Electronic control equipment Electrical control apparatus including a power supply, a regulating element, a manually-operable control device which can be set to provide a preset output from the regulating element, and an automatic control circuit for modifying the operation of the co... | 09/29/1987 |
| 4680536 | Dimmer circuit with input voltage compensated soft start circuit A circuit for controlling the initiation and operation of a phase control circuit employed in voltage regulation to a load such as dimming lights. The circuit uses a power semi-conductor which is triggered by a "walk-in" circuit. The "walk-in" circuit inc... | 07/14/1987 |
| 4644229 | Power supply for lighting incandescent lamp wth high-brightness The present invention provides a power supply for lighting an incandescent lamp with high-brightness, comprising connecting a time constant circuit, rectifier, switching device so that the output of the rectifier is supplied to an incandescent lamp throug... | 02/17/1987 |
| 4507569 | Electrical control system and driver An electrical control system controls an electrical load device, particularly an inductive load such as the ballast of a gas discharge lamp which generates a back EMF when power is removed therefrom. The control system includes a first electronic switch f... | 03/26/1985 |
| 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 |
| 4328459 | Current inrush limiting apparatus Current inrush limiting apparatus is disclosed including a power supply circuit (32) which regulates the transmission of power from a source (12) to a load (14). A soft start control (36) controls the power supply to prevent excessive current inrush to th... | 05/04/1982 |
| 4220910 | Raising-pressure delay type electromagnetic pumps An electromagnetic pump in which the ignition sound at the time of starting of a combustor is lowered by delaying a raising speed for the delivery pressure of fuel oil. The delivery pressure of fuel oil is automatically controlled by means of an electroni... | 09/02/1980 |
| 4190756 | Digitally programmed microwave cooker A microwave cooker digitally programmed in any of a plurality of different cycles whose digital programs are selected from a front panel display. Programs include a cook cycle, a defrost cycle, and/or a defrost and cook cycle, in which a body of refrigera... | 02/26/1980 |
| 4177369 | Digitally programmed microwave oven A digitally programmed microwave oven having a microwave generator energized by a high voltage power supply connected to an alternating current source through mechanically actuated oven door interlock switches, with the power supply regulating the current... | 12/04/1979 |
| 4072880 | Starting control apparatus for AC load A starting control apparatus for an AC load includes a bidirectional triode thyristor switching device connected in series between an AC power source and the load, a rectifying circuit connected in parallel to the bidirectional triode thyristor switching ... | 02/07/1978 |
| 4050008 | Control unit for an a-c control element with full-wave control A control unit for the full-wave control of an a-c control element. The control unit comprises a push-pull oscillator for generating control pulses for the thyristors of the control element. The oscillator includes a transformer and is followed by rectifi... | 09/20/1977 |
| 4008416 | Circuit for producing a gradual change in conduction angle The specification discloses a circuit which produces a gradual increase or decrease in the alternating current power applied to a series connected load. Double time constant gating circuitry and capacitor integration may be utilized in combination with se... | 02/15/1977 |
