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Pet Toilet-Like Water Disk and Food Storage
One pet-friendly inventor patented "a device for watering pets, e.g., a dog or cat." The device, he helpfully noted, "has the general shape of a toilet."
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| Number | Title | Issue Date |
| 7407617 | Free radical polymerization method having reduced premature termination, apparatus for performing the method, and product formed thereby A method of polymerizing by a free radical polymerization mechanism, product formed thereby, and apparatus for performing this method, are disclosed. The composition to be polymerized by the free radical polymerization mechanism is irradiated by a substantially cons... | 08/05/2008 |
| 7283131 | Image display apparatus An image display apparatus having a plurality of image forming devices. In an output circuit provided between constant voltage supplies and wiring for driving each of the image forming devices, MOSFETs are successively turned on from the one having a higher ON resis... | 10/16/2007 |
| 7276858 | Decorative lighting string with stacked rectification An improved decorative light string circuit comprises full bridge rectification located in or downstream of the front plug, wherein the rectification circuit contains one or more voltage reducing and/or filtering elements in order to reduce or limit LED drive curren... | 10/02/2007 |
| 7224151 | Fixed phase power controller with analog trigger A fixed phase power controller that converts a line voltage to an RMS load voltage includes an analog control block with a capacitor that receives an input that is independent of a change in magnitude of the line voltage and that charges and discharges to provide a ... | 05/29/2007 |
| 7218164 | Emitter switching driving network to control the storage time A driving network for an emitter-switching circuit comprises a pair of cascode-configured transistors, the one of the bipolar type and the other of the MOS type, and the driving network is of the type comprising a driving block for respective conduction terminals an... | 05/15/2007 |
| 7081709 | Method and apparatus for lighting a discharge lamp A reliable and efficient circuit for lighting a discharge lamp is described. An inverter accepts a direct current supply voltage and outputs an alternating current lamp voltage to drive the discharge lamp at a relatively high frequency. In one embodiment, the invert... | 07/25/2006 |
| 7053678 | Driving circuit for a control terminal of a bipolar transistor in an emitter-switching configuration and corresponding method for reducing the VCESAT dynamic phenomenon A driving circuit is provided for a control terminal of a bipolar transistor in an emitter-switching configuration. The emitter-switching configuration is between first and second voltage references. The driving circuit includes at least one first resistive element ... | 05/30/2006 |
| 7034465 | Device for operating discharge lamps by means of a transformer with four windings, and a corresponding method A device for operating a plurality of discharge lamps is to be fashioned cost-effectively. Consequently, two discharge lamps (71, 72) are operated with the aid of one ballast in whose load circuit the heating current for the individual incandescent filaments ... | 04/25/2006 |
| 7023246 | Driving circuit for a control terminal of a bipolar transistor in an emitter-switching configuration having a resonant load A driving circuit is provided for a control terminal of a bipolar transistor in an emitter-switching configuration. The emitter-switching configuration is between a resonant load and a voltage reference. The driving circuit includes at least one capacitor between th... | 04/04/2006 |
| 6980119 | Solid-state warning light with environmental control The present invention relates generally to warning lights, and more specifically, to solid-state (LED) warning light whose operation is modulated in response to environmental conditions, generally under the supervision of a microprocessor or dedicated control circui... | 12/27/2005 |
| 6949889 | Wide input voltage range light emitting diode driver A current-regulating driver circuit for a light emitting diode (LED) maintains energization drive to and thereby illumination provided by the LED at a prescribed, substantially constant value, over a relatively wide range of input (AC or DC) voltage. First and secon... | 09/27/2005 |
| 6949885 | Discharge lamp lighting device and lighting apparatus A discharge lamp lighting device includes a discharge lamp that is lighted through an L-C resonance induced by an oscillation output of an inverter circuit. An on-off operation of switching elements of the inverter circuit is controlled by a control IC which include... | 09/27/2005 |
| 6943498 | High intensity discharge lamp and high intensity discharge lamp system using the same To provide a high-efficiency and long-life high intensity discharge lamp that is obtained by a configuration in which a neon gas or a neon-based gaseous mixture is filled as a starting-assistance rare gas for an alumina ceramic arc tube, and a filling pressure is se... | 09/13/2005 |
| 6831421 | Shunt-induced high frequency excitation of dielectric barrier discharges An ionizing discharge device operating arrangement wherein initiation of discharges in for example a dielectric barrier discharge device is accomplished by a short circuit shunting of the charged electrodes of the device. A cycle of slow charging of the device inter... | 12/14/2004 |
| 6808287 | Method and apparatus for a pulsed L.E.D. illumination source Improved method and apparatus for hand-held portable illumination. A flashlight and corresponding method are described. The flashlight includes a housing, a plurality of LEDs, and an electrical circuit that selectively applies power from the DC voltage source to the... | 10/26/2004 |
| 6788008 | Device for operating a dielectric barrier discharge lamp A device for operating a dielectric barrier discharge lamp in which not only the efficiency is maintained, but in which a reduction of the irradiance over the course of use is advantageously prevented. The device includes a dielectric barrier discharge lamp and a fe... | 09/07/2004 |
| 6724152 | Lighting control system with variable arc control including start-up circuit for providing a bias voltage supply A lighting control system provides variable arc current to one or more fluorescent gas discharge lamps and provides a heating voltage to the lamp electrodes. The system includes a start-up circuit which includes circuitry for providing a starting voltage to an outpu... | 04/20/2004 |
| 6534931 | Dimming control system for electronic ballasts A dimming control system includes a first circuit (100) and a second circuit (200). First circuit (100) is coupled in series with the AC line source (10) and receives brighten and dim commands from a user. The brighten and dim commands are communicated to... | 03/18/2003 |
| 6091207 | Pump support choke A pump supporting inductor (L1) is added to a half-bridge oscillator circ for a low-pressure discharge lamp (E) having a capacitive pump path, which inductor improves the pumping action of the pump path and its frequency response. Furthermore, an additio... | 07/18/2000 |
| 6051938 | Dimmable ballast with active power feedback control A circuit arrangement for high-frequency operation of a discharge lamp comprises a low-frequency rectifier for generating a DC voltage (buffer voltage) across a first capacitor (C1) from a low-frequency supply voltage. A DC/AC converter generates a high-f... | 04/18/2000 |
| 5977722 | Device for applying particular voltage waveform for operating a discharge lamp The invention relates to a device for operating a fluorescent discharge lamp of the outer electrode type. As claimed in the invention a switching device is turned on and off by driver signals with a stipulated frequency, by which on the secondary side of ... | 11/02/1999 |
| 5854542 | Flashing and diming fluorescent lamps for a gaming device A method and apparatus for signaling promotional operation of a gaming device using existing fluorescent illumination lamps. An illumination lamp on a gaming device is operated continuously during normal operation, then flashed to signal promotional opera... | 12/29/1998 |
| 5811938 | Emergency lighting ballast for starting and operating two compact fluorescent lamps with integral starter A method and circuit for operating two fluorescent lamps having a starter with power supplied by a battery by generating an alternating current from energy supplied by the battery, supplying the alternating current as a starting current to the lamps for a... | 09/22/1998 |
| 5606224 | Protection circuit for fluorescent lamps operating at failure mode A circuit for protecting fluorescent lamps connected to high frequency electronic ballasts has a detecting bridge connected to the fluorescent lamps, an output of the detecting bridge varying linearly with the highest voltage across the fluorescent lamps,... | 02/25/1997 |
| 5583402 | Symmetry control circuit and method The present invention provides a method and circuit for controlling the flow of current through a load. In a preferred embodiment, an oscillator generates a pulse signal of constant frequency. A pulse width modulator adjusts the duty cycle of the pulse si... | 12/10/1996 |
| 5510679 | Reverse phase-controlled dimmer with integral power adjustment means Reverse phase-controlled dimming of an a.c.-powered load is accomplished by switching power to the load on and off during each half cycle. In one embodiment of the present invention, power is switched on when line voltage is substantially equal to load vo... | 04/23/1996 |
| 5506477 | Method of sensing the rms value of a waveform A method of sensing the rms value of a phase chopped sinusoidal electrical waveform including combining an input signal representative of the waveform with an auxiliary signal in a combining circuit which produces a combining circuit output equal to which... | 04/09/1996 |
| 5463281 | Circuit arrangement for operating a high-pressure discharge lamp A circuit arrangement for operating a discharge lamp, comprising a DC-AC converter provided with a branch comprising a series circuit of two switching elements, each switching element being shunted by a unidirectional element, while ends of the branch are... | 10/31/1995 |
| 5369339 | Circuit arrangement for reducing striations in a low-pressure mercury discharge lamp A circuit arrangement for operating a low-pressure mercury discharge lamp by a high-frequency current which includes a DC component and a high-frequency AC component. The circuit arrangement has a switching device for generating the high-frequency AC comp... | 11/29/1994 |
| 5229690 | Apparatus for operating discharge lamps utilizing a capacitor and charging circuit An apparatus for operating discharge lamps includes first closed circuit for connecting a discharge lamp through first switching means to a pulsating power source, second closed circuit for connecting the lamp to the power source through a series circuit ... | 07/20/1993 |
| 5173642 | Rare gas discharge fluorescent lamp device The present invention provides a rare gas discharge fluorescent lamp device which is long in life and high in brightness and efficiency. The lamp device basically comprises a rare gas discharge fluroescent lamp wherein rare gas is enclosed in the inside o... | 12/22/1992 |
| 5115168 | Power supply for microwave discharge light source A power supply circuit for a magnetron adapted to supply microwave energy to an electrodeless discharge bulb is disclosed. The circuit includes a rectifier coupled across a commerical AC voltage source, a filter for smoothing the output of the rectifier, ... | 05/19/1992 |
| 5111115 | Fluorescent lamp controller A circuit suitable for the instantaneous starting, continuation, and interruption of current through one or more gasfilled discharge tubes, in particular fluorescent lamps, is described. The circuit and lamp heaters are energized before instantaneous cont... | 05/05/1992 |
| 5053682 | Power supply for microwave discharge light source A power supply circuit for a magnetron adapted to supply microwave energy to an electrodeless discharge bulb is disclosed. The circuit includes a rectifier coupled across a commercial AC voltage source, a filter for smoothing the output of the rectifier, ... | 10/01/1991 |
| 5034661 | Rare gas discharge fluorescent lamp device The invention provides a rare gas discharge fluorescent lamp device which is long in life and high in brightness and efficiency. The lamp device comprises a rare gas discharge fluorescent lamp including a bulb having rare gas such as xenon, argon or krypt... | 07/23/1991 |
| 5004953 | Emergency lighting ballast for compact fluorescent lamps with integral starters A method and circuit for operating a fluorescent lamp having a starter with power supplied by a battery by generating an alternating current from energy supplied by the battery; supplying the alternating current as a starting current to the lamp for a sel... | 04/02/1991 |
| 4988922 | Power supply for microwave discharge light source A power supply circuit for a magnetron adapted to supply microwave energy to an electrodeless discharge bulb is disclosed. The circuit comprises a rectifier coupled across a commercial AC voltage source, a filter for smoothing the output of the rectifier,... | 01/29/1991 |
| 4937505 | Energizing arrangement for a discharge lamp The discharge lamp energizing arrangement of this invention comprises a starter and a generator adapted to maintain a discharge current in the lamp. The generator includes a first circuit arranged to couple in series a D.C. voltage source, a first switch ... | 06/26/1990 |
| 4929871 | Transformerless current-limiting circuit Appliances such as fluorescent lamps and low-voltage DC motors can be operated from household AC without a transformer by employing a current-limiting circuit which is compact, lightweight, reliable, draws less energy, and has fewer power consuming compon... | 05/29/1990 |
| 4922155 | Protective circuit for reduced voltage lamps A fail safe feature for long life reduced voltage lamps including diodes id disclosed. As known, a low wattage lamp may designed for longer life by using a lower root mean square design voltage. The root means square voltage of the alternating source curr... | 05/01/1990 |
