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Patent No. 5508049

Pizza Pie With Concentric Rings of Crust

A pizza mold for forming a plurality of concentric raised ridges of dough (i.e., crust) on the surface of a pizza pie.

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Class 315/160 - PLURAL POWER SUPPLIES


Subclass of Class 315 - Electric lamp and discharge devices: systems
Definition: Systems provided with two or more sources of current supply.
No. of patents: 97
Last issue date: 05/08/2012


    3  
NumberTitleIssue Date
5384516Information processing apparatus including a control circuit for controlling a liquid crystal display illumination based on whether illuminatio power is being supplied from an AC power source or from a battery
An information processing apparatus employs a liquid crystal display and a fluorescent lamp for backlighting the screen of the liquid crystal display. A lighting circuit for supplying alternating current lighting power to the fluorescent lamp receives inp...
01/24/1995
5349269Power supply having dual inverters for electroluminescent lamps
A power supply for an electroluminescent lamp includes a pair of inverters for alternately powering the EL lamp from a low voltage DC source. A first inverter is connected to a first electrode of the EL lamp and a transistor is connected between the first...
09/20/1994
5349268High voltage discharge lamp device
A high voltage discharge lamp device may include a step-up DC-DC converter connected to a power switch; polarity switching elements for alternatively changing the polarities of the electric voltage outputted from the step-up DC-DC converter; and a polarit...
09/20/1994
5343121Naturalistic illumination system
Apparatus for adjusting the circadian rhythm of a subject in a space by producing a variable light intensity level on a continuous basis in which there is a light source and the light output from the source made available to the subject in the space is co...
08/30/1994
5315215High-voltage switching circuit
A pair of transistors (110 and 112) configured with their channels connected in series. The gate of the "upper" transistor (110) is coupled to a relatively low-voltage, DC power supply voltage by a voltage-clamping and current-steering diode (144); to a r...
05/24/1994
5079484Voltage-regulated supply, notably for microwave tubes
A supply unit for a tube of the type requiring both a cathode supply and a collector supply, notably for a travelling wave tube. The tube features a collector biasing device, working essentially as a voltage source, delivering a weakly regulated or unregu...
01/07/1992
5040185Large volume gaseous electric discharge system
A control circuit for a laser system having a first and second power supply connected in parallel. A mode selector is available to the laser operator to change the operational mode of the laser system from continuous to pulse mode or vice versa, and any c...
08/13/1991
5028844DC discharge lamp lighting device
A DC discharge lamp lighting device includes a main discharge means providing a main discharge-lamp current to a DC discharge lamp including a filament and at least one anode to form between them a discharge path. The main discharge means comprises means ...
07/02/1991
4983885Thin film EL display panel drive circuit
A thin-film EL display panel drive circuit capable of varying the drive voltage according to changes in the number of emitting picture elements....
01/08/1991
4755724Method for periodic triggering of several radiation-emitting elements
The invention relates to a method of controlling several radiation-emitting elements. The invention consists in the compensation of differences in the emission power of the individual elements due to variations in the efficiency of the elements or to diff...
07/05/1988
4749914Circuit system for igniting and operating a high-pressure discharge lamp, particularly a sodium vapor lamp
A circuit system for igniting and lighting a high-pressure discharge lamp, particularly a sodium vapor lamp, comprising a pulse generator for generating signals of at least 1 kHz frequency being a high-frequency DC/AC converter connected to a direct curre...
06/07/1988
4749908Emergency power supply
An emergency power supply including an input for connection to a power line, an output for connecting the input to electrical equipment so as to supply power thereto from the power line, a supplemental power supply connected to the output and adapted to s...
06/07/1988
4745613Laser flash lamp triggering circuit
A laser flash lamp triggering circuit is connected in parallel with the flash lamp and between the flash lamp and the flash lamp power supply. A impedance element is connected between the parallel trigger circuit network and the pulse forming network in t...
05/17/1988
4649322Energizing arrangement for controlling the luminous intensity of at least one discharge lamp and use of such arrangement
The arrangement of the invention enables control of a light emitting element comprising at least one discharge tube. Firing of the tube is effected by a generator which provides voltage pulses at predetermined periodic intervals (Tr). The lumin...
03/10/1987
4530550Power supply unit for electronic flash
A power supply unit for electronic flash includes a plurality of charging units connected to a main capacitor of an electronic flash through diodes which prevent a reverse current flow. Each charging unit includes a d.c. source and a booster converter. An...
07/23/1985
4392085Direct drive ballast with delayed starting circuit
A delayed starting circuit for an electronic ballast system that includes an inverter coupled to a secondary voltage source. The starting circuit includes a voltage divider having an input coupled to a charge storage capacitance in the voltage source and ...
07/05/1983
3978346High DC voltage generator
A resistor is provided in parallel with a first coil. By suspending the supply of a DC current to the first coil while the DC current is flowing through the first coil, a high DC voltage is generated across the resistor and the high DC voltage is applied ...
08/31/1976
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