Class 331/86 - WITH MAGNETICALLY CONTROLLED SPACE DISCHARGE DEVICE (E.G., MAGNETRON)

Subclass of Class 331 - Oscillators
Definition: Subject matter wherein the active element of the oscillator
No. of patents: 38
Last issue date: 01/10/2006

Number	Title	Issue Date
6985042	Magnetron The object to the present invention is to provide a magnetron which can reduce spurious oscillation such as the π−1 mode which presents a problem particularly in magnetrons and can reduce spurious radiations without placing filters. The magnetron of the present i...	01/10/2006
6960283	Anode and magnetron therewith Anode with a 2450 MHz resonance frequency, and magnetron therewith, the anode including a cylindrical anode body with an inside diameter in a range of 32.5 to 34.0 mm, a total of ten vanes fitted to an inside circumferential surface of the anode body in a radial dir...	11/01/2005
6875970	Safety apparatus for output level-adjustable microwave oven A safety apparatus for an output level-adjustable microwave oven includes a fuse disposed in a power supply line that connects a high power relay or a low power relay with a primary coil of a high voltage transformer of the microwave oven. Where a wrong operation oc...	04/05/2005
5767749	Microwave oscillator A microwave oscillator with an M-type interdigital slow wave resonator structure is disclosed. In the above oscillator, the anode has top, middle and bottom resonance discs. The top disc has downward extending vanes and defines an upper resonance chamber,...	06/16/1998
5721470	Microwave generator apparatus comprising controller for automatically adjusting filament power of a magnetron In a microwave generator apparatus including a magnetron having a filament and an anode and generating a microwave, a filament power source supplies a filament power to the filament of the magnetron, and an anode power source applies an anode voltage betw...	02/24/1998
5676873	Microwave oven and magnetron with cold cathode There is provided a magnetron comprising a cold cathode having an electron emitting member which is formed linearly or as a plane on a substrate to emit electrons a subdivided anode disposed oppositely in parallel with the electron emitting member, the su...	10/14/1997
5162698	Cascaded relativistic magnetron A cascaded magnetron device has an elongate cathode shank extending along its axis and a series of tubular anode elements placed end to end in a linear cascade surrounding the cathode shank along at least part of its length. Each adjacent pair of anode el...	11/10/1992
5159241	Single body relativistic magnetron A relativistic magnetron device comprising an elongate cathode shank extending along the axis of the device and a cylindrical anode surrounding the cathode shank along at least part of its length to define an annular interaction area. The anode has an eve...	10/27/1992
5113154	Microwave generator device with virtual cathode A microwave generator that uses an electron beam and the phenomenon of the oscillating virtual cathode, but makes it possible to obtain energy with improved spectral quality and conversion efficiency as compared with standard vircator generators. This is ...	05/12/1992
5045814	High impedance circuit for injection locked magnetrons A high impedance circuit has radially disposed first vanes and radially disposed second vanes interdigitating between the first vanes. The first vanes and the second vanes are each interconnected by a first toroidal strap and a second toroidal strap, resp...	09/03/1991
5043680	Resonant converter oscillator usable for powering a magnetron A magnetron is powered via an output transformer TR whose primary winding (a) is connected in series with a resonant converter oscillator circuit comprising an inductor (L) and a capacitor (C3) and switching transistors (T1, T2) whic...	08/27/1991
5021713	Magnetron A magnetron in which a choke for preventing leakage of harmonic components of leaking microwaves to the outside of the tube is formed by a metal piece with slots that is placed within the tube or a conductive film that is placed on an insulating area of t...	06/04/1991
4988956	Auto-resonant peniotron having amplifying waveguide section In a peniotron, a hollow electron beam is generated from a cathode gun assembly and a DC magnetic field is applied to the electron beam from solenoid coils. Thus, each electron of the electron beam is gyrated into a resonant cavity and into propagating wa...	01/29/1991
4873408	Magnetron with microprocessor based feedback control A microwave oven uses a full wave full bridge inverter for supplying energy to a cooking magnetron by way of a power transformer. The inverter is controlled by a microprocessor which acts upon a control circuit having an oscillator. Two feedback loops are...	10/10/1989
4820688	Traveling wave tube oscillator/amplifier with superconducting RF circuit Microwave oscillators and amplifiers which utilize a superconducting slow-wave circuit. The slow circuit is made from materials which exhibit superconductivity at relatively high critical temperatures. The slow wave circuit is integral with the device's v...	04/11/1989
4785261	Magnetically insulated transmission line oscillator A magnetically insulated transmission line oscillator employs self-generated magnetic fields to generate microwave energy. An anode of the oscillator includes slow-wave structures which are formed of a plurality of thin conductive vanes defining cavities ...	11/15/1988
4752720	Magnetron with fifth harmonic suppression projection in through capacitor seal A magnetron with a filter case housing a through-type capacitor and a choke coil wherein a mounting plate for the capacitor is fixed in intimate contact with the wall of the filter case along a line encircling a through-hole drilled in the wall of the fil...	06/21/1988
4730170	Virtual cathode microwave generator having annular anode slit A microwave generator is provided for generating microwaves substantially from virtual cathode oscillation. Electrons are emitted from a cathode and accelerated to an anode which is spaced apart from the cathode. The anode has an annular slit therethrough...	03/08/1988
4668924	Free electron diode oscillator A crossed-field microwave power tube. Electrons are emitted from a tubular lectrode at ground potential. The electrons are accelerated by an electric field toward a high voltage anode located within the tubular electrode. A magnetic field is oriented along...	05/26/1987
4628284	High frequency high voltage power supply preventing simultaneous transistor conduction A push-pull current-fed parallel resonant oscillator includes a parallel resonant LC tank circuit with one end coupled to one terminal of a DC current source via a serially connected first diode and first switching transistor and the other end of the tank...	12/09/1986
4588965	Coaxial magnetron using the TE₁₁₁ mode A coaxial magnetron has a high-Q resonant cavity surrounding a multiple-resonator anode circuit and coupled by slots to alternate anode resonators. The cavity is resonant in the TE111 mode, having two zero points of electric field on its periph...	05/13/1986
4555680	Magnetron tuned programmably using step motor A resonant-cavity type electronic tube having mechanically-operable tuning vanes associated with its resonant-cavity structure and disposed within an evacuable envelope. A support member is provided within the envelope for adjusting the tuning vanes relat...	11/26/1985
4553068	High power millimeter-wave source A simple method and apparatus are disclosed for producing high power gigat level millimeter radiation from an intensely oscillating relativistic turbulent electron plasma created in and beyond the gap of a high voltage diode configuration. The diode is c...	11/12/1985
4517430	Microwave heating device with constant temperature control of the magnetron A heating device for use in laboratories and the like comprising an oven housing having a magnetron tube, power control circuitry for the magnetron tube, a timer for determining an amount of pulse power for the magnetron tube, a settable heating time swit...	05/14/1985
4482870	Magnetron with magnetic yoke having annular projection In a magnetron of the type wherein a gasket member in the form of a fine metal wire net is disposed between a cup shaped sealing member on the output side, and a magnetic yoke providing a magnetic flux passage for permanent magnets contained in the magnet...	11/13/1984
4481447	Power supply for a magnetron A method of controlling the power output of a magnetron tube, and an electric power supply for supplying power to the tube. According to the method, power is continuously supplied to the magnetron heater. At the same time, a voltage is continuously applie...	11/06/1984
4480234	Gyrotron backward wave oscillator device A gyrotron backward wave oscillator device is described which can be operated in a controlled and predictable manner. The device includes an evacuated waveguide section, an electron source at one end providing a spiral electron beam, a collector at the op...	10/30/1984
4419606	Magnetron A magnetron has a filter circuit inserted in a feeder line to a cathode electrode included in a high frequency generator and comprised of choke coils and a capacitor connected in series, in order to suppress leakage of unwanted high frequency components f...	12/06/1983
4356431	Magnetron energizing circuit Microwave oven with a self-regulating circuit operated from a low voltage a.c. source based upon a substantially constant current transformer and condenser series combination and having a return path for current on alternate half cycles. For defrosting fo...	10/26/1982
4302651	High-voltage SCR circuit for microwave oven and the like An SCR circuit is provided in a high-voltage supply for energizing a magnetron that is assembled in a microwave oven. The high-voltage supply circuit includes a voltage step-up transformer. This transformer is arranged with a low-voltage secondary winding...	11/24/1981
4288721	Microwave magnetron-type device A microwave magnetron-type device comprises an anode assembly or block in the form of a multistage two-dimensional periodic retarding system, including cavities with vanes, each having a lumped inductance portion defined by the vane sidewalls near the van...	09/08/1981
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
4175246	Energizing circuit for magnetron using dual transformer secondaries A magnetron energizing circuit preferably uses two transformers of the high leakage reactance type having isolated secondaries with an end terminal of each secondary connected to a common point which is at ground potential. The secondaries are connected t...	11/20/1979
4164685	Magnetron device A magnetron device emits through the filament terminals electromagnetic waves of a broad frequency band which act as noises to other electronic devices. The magnetron device comprises a filament or heater circuit for supplying heater voltage to the filame...	08/14/1979
4017702	Microwave oven including apparatus for varying power level Apparatus for varying microwave power level is included in a microwave oven. The microwave oven includes a magnetron for producing microwaves used for heating and a half-wave voltage doubler for supplying half-wave pulsating DC voltage to the magnetron. I...	04/12/1977
4012617	Power controller for microwave magnetron A power supply for a microwave magnetron includes a transformer having a secondary winding, a capacitor connected to one end of the winding, a magnetron connected in between the remaining end of the capacitor and the winding so as to form a first unidirec...	03/15/1977
4001537	Power controller for microwave magnetron A microwave magnetron operating circuit includes a high leakage reactance transformer having a secondary winding a capacitor connected in series with the secondary winding and means connecting the series combination of capacitor and secondary winding acro...	01/04/1977
3982152	Cascade crossed field device A crossed-field device having a plurality of slow wave energy propagating structures, each with an associated cathode, requires relatively low voltage for operation to provide a high power output. Electron beam current control is achieved by means of RF d...	09/21/1976

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Class 331/86 - WITH MAGNETICALLY CONTROLLED SPACE DISCHARGE DEVICE (E.G., MAGNETRON)