Class 219/717 - Plural power supplies

Subclass of Class 219 - Electric heating
Definition: Subject matter wherein two or more power sources are feeding
No. of patents: 33
Last issue date: 11/13/2007

Number	Title	Issue Date
7293705	Radio frequency identification method and system of distributing products A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and c...	11/13/2007
7258276	Radio frequency identification method and system of distributing products A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and c...	08/21/2007
7230218	Microwave or radio frequency device including three decoupled generators A microwave or radio frequency device including an applicator for receiving an object to be processed, and a plurality of generators supplying power to the applicator via propagation guides. According to the invention, three propagation guides propagating the microw...	06/12/2007
7202455	Microwave oven Microwave oven including a case with a door, a cooking chamber in the case openable/closable with the door, and having a microwave applicable thereto, a first tray mounted in the cooking chamber to reciprocate therein, a second tray rotatably mounted on the first tr...	04/10/2007
7165720	Radio frequency identification method and system of distributing products A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and c...	01/23/2007
7102110	Magnetron oscillating apparatus A magnetron oscillating apparatus includes a magnetron, power supply unit, and switch circuit. The magnetron oscillates a microwave. The power supply unit applies a power to the magnetron. The switch circuit is connected between the power supply unit and the cathode...	09/05/2006
6858824	Microwave heating system to provide radiation heat and domestic hot water A microwave heating system is provided which uses a heat conductive medium. The heat conductive medium is heated in a heater. The heater includes a shell which forms an enclosure. The enclosure has an upper end and a lower end. A heating coil is located in the enclo...	02/22/2005
6774567	Microwave oven A microwave oven using DC power which can endure strong vibrations and eliminate noise according to noise standards. The microwave oven includes at least one second choke coil which is arranged outside a magnetron filter box and connected in series to at least one f...	08/10/2004
6680467	Microwave delivery system with multiple magnetrons for a cooking appliance A microwave delivery system for a cooking appliance includes an electronic control unit and a plurality of magnetrons arranged in a spaced relationship for the introduction of various energy fields into an oven cavity. The electronic control unit creates ...	01/20/2004
6441355	Microwave heating using independently controllable internal and external antennae A microwave heating apparatus including a cavity for heating food, a first antenna, which projects into the cavity and is arranged to pass into or through the food in order to irradiate the food internally, and a second antenna arranged to supply microwav...	08/27/2002
5961871	Variable frequency microwave heating apparatus A variable frequency microwave heating apparatus (10) designed to allow modulation of the frequency of the microwaves introduced into a multi-mode microwave cavity (34) for testing or other selected applications. The variable frequency microwave heating a...	10/05/1999
5571439	Magnetron variable power supply with moding prevention A power supply for a magnetron varies a power output level and prevents moding of the magnetron. To provide a variable power output, a microprocessor senses an anode current and voltage of the magnetron. Based on the sensed signals, the microprocessor adj...	11/05/1996
5521360	Apparatus and method for microwave processing of materials A variable frequency microwave heating apparatus (10) designed to allow modulation of the frequency of the microwaves introduced into a furnace cavity (34) for testing or other selected applications. The variable frequency heating apparatus (10) is used i...	05/28/1996
5451751	High-frequency heating apparatus with wave guide switching means and selective power switching means for magnetron A high-frequency heating apparatus capable of heating uniformly a liquid load, having an economical wave guide switching unit and having a compact-sized and economical power circuit to drive a plurality of magnetrons. The high-frequency heating apparatus ...	09/19/1995
5424518	Device for applying heated air to a cavity using microwave generators A complete unit for simultaneous production of warm air and microwave energy is ready for delivery. The device contains three transmitters with wave-guides (8) for microwave energy, power components (9) and a fan (10). The fan blows cooling air past the p...	06/13/1995
5369255	Combined microwave unit and food carrier A unit is suitable for storing and carrying food, and includes a microwave unit therein. The microwave unit is used to heat food and includes a power cord that can be attached to a source of utility power or to a battery. The unit can also include batteri...	11/29/1994
5331128	Apparatus for driving microwave oven using both A.C. and D.C. current An apparatus for driving a microwave oven, comprising a system controller for controlling the associated peripheral components in response to an output signal from an AC/DC sensing section, a first switching section for selecting one of external AC power ...	07/19/1994
5285041	Automated food vending system An automated food vending system includes a vending machine having a plurality of stacks and dispenser mechanisms for dispensing standardized food package units, a microwave oven having a code reader located in a predetermined position in an interior cavi...	02/08/1994
5276300	AC/DC powered microwave oven A microwave oven is described suitable for use on transports where DC power is available. The microwave oven employs a first inverter to generate internal AC power that is then used to operate the microwave components other than the magnetron microwave so...	01/04/1994
5268547	High frequency heating apparatus utilizing inverter power supply A high frequency heating apparatus includes a unitary structure including a magnetron for generating a microwaves, an inverter power supply for supplying a high voltage electric power to the magnetron, and a cooling unit for cooling the magnetron and the ...	12/07/1993
5179259	Inverted frustum shaped microwave heat exchanger using a microwave source with multiple magnetrons and applications thereof A microwave sourced heat exchanger in an inverted, truncated frusta-pyramidal or frusta-conical shaped configuration. A heat conductive medium is carried within microwave transparent pipes toward a microwave source having one or more magnetrons along a sp...	01/12/1993
5171948	High frequency heating apparatus A high frequency heating apparatus includes a casing, an inverter enclosed in the casing, a magnetron supplied with high frequency voltage from the inverter, and three attachment plugs each connected to one of external power supplies of different output v...	12/15/1992
5148814	Heating apparatus for hyperthermia A heating apparatus for hyperthermia utilizes electromagnetic waves for locally heating cancerous cells within a living body. When it is necessary for a plurality of patients to be subjected to hyperthermia treatment at the same time and in parallel with ...	09/22/1992
5064494	Process for the at least partial curing of sealants and adhesives using pulsed microwave energy For the at least partial curing of sealants and adhesives in particular in connection with the direct glazing of motor vehicles, at least part of the sealant and adhesive is heated by applying microwave energy....	11/12/1991
4939330	Method and arrangement for controlling output power of a plurality of magnetrons connected to a common power source A method for controlling magnetrons with regard to their microwave power in those cases where a multiple of magnetrons are present. The method includes connecting two or more magnetrons in parallel with a power unit operative in generating a high voltage ...	07/03/1990
4939331	Arrangement for controlling the microwave power of magnetrons An arrangement for controlling the microwave power of magnetrons, in which a multiple of magnetrons are connected in parallel with a power unit (3) for generating a high magnetron-operating voltage, and which arrangement includes for each magnetron (1,2) ...	07/03/1990
4904837	Powered microwave oven A microwave oven is described suitable for use on transports where DC power is available. The microwave oven employs a first inverter to generate internal AC power that is then used to operate the microwave components other than the magnetron microwave so...	02/27/1990
4795871	Method and apparatus for heating and drying fabrics in a drying chamber having dryness sensing devices The invention relates to a microwave heating and drying method and apparatus utilizing a multiplicity of microwave propagating sources positioned about a heating and drying chamber. The microwave energies are optimized to provide a greater uniformity in t...	01/03/1989
4551601	Heat cooking apparatus with temperature operating system A heat cooking apparatus with a temperature operating system, wherein a microcomputer detects an abnormality of a temperature sensor and de-energizes the cooking apparatus to stop cooking while also producing a sensor fault pulse signal. Upon counting of ...	11/05/1985
4504718	Microwave heating apparatus with solid state microwave oscillating device A microwave heating apparatus comprises a solid state oscillating circuit, a pre-amplifier module for amplifying the output of the oscillating circuit, a plurality of amplifier modules for amplifying the output of the pre-amplifier module, a first power s...	03/12/1985
4314128	Silicon growth technique and apparatus using controlled microwave heating Control of thermal gradients in a crystal being pulled from a melt is achieved using stratified microwave coupling. Plural microwave radiators are arranged along the crystal path. The radiators are driven by power sources having stepped energy levels so t...	02/02/1982
4268779	Circuit for controlling current flow from an A.C. source to a load A circuit for controlling power consumption of a load, by controlling the flow of current thereto, utilizes at least one parallel combination of non-linear resistance elements, such as a varistor and the like, and a gateable semiconductor switching device...	05/19/1981
4001536	Microwave oven controls A control for a microwave oven is disclosed in which cooking time is set by touching one of a number of touch plates on the oven control panel. An oscillator provides an asymmetric signal to a plurality of level detectors by way of the touch plates and as...	01/04/1977

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Class 219/717 - Plural power supplies