Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7208710 | Uniform microwave heating method and apparatus A method and apparatus for creating uniform heating of an microwave absorptive target. A circularly polarized waveguide mode is created that promotes uniform heating of the microwave absorptive target by rotating a propagated non-uniform field pattern around a centr... | 04/24/2007 |
| 7015443 | Sheathed electric heating element support bracket for RF cooking applications A sheathed electric resistive heating element support bracket constructed in accordance with the present invention includes first and second mounting portions interconnected through a transverse web portion. The web portion includes at least one heating element rece... | 03/21/2006 |
| 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 |
| 6657151 | Plasma processing device To uniformly generate plasma using microwaves in a processing vessel. To first to fourth feeding sections 141a to 141d which are evenly placed on the same plane perpendicular to an axial direction of a main coaxial line 123, four microwaves shifted in pha... | 12/02/2003 |
| 6469286 | Variable-impedance unit, microwave device using the unit, and microwave heater A compact and highly controllable impedance-varying-unit, a microwave device using the same unit, and a high-frequency-heating appliance using the same unit are provided. The impedance varying unit includes a rectangular waveguide-section as a main body m... | 10/22/2002 |
| 6034362 | Circularly polarized microwave energy feed A feed that provides circularly polarized microwave energy such as for energizing a cavity in a microwave oven. The feed includes a transformer to match a linearly polarized rectangular waveguide to an exit waveguide which may be circular or square in cro... | 03/07/2000 |
| 5932131 | Microwave oven with different phase microwave streams A microwave oven is disclosed in which the structure of the wave guiding tube is improved such that the variation of the impedance is minimized in spite of the variation of the load of the food, thereby making it possible to maintain the output of the mic... | 08/03/1999 |
| 5632955 | Microwave sterilizer for metal objects An apparatus uses microwave radiation to sterilize metal equipment including sharp edged metal equipment having small quantities of water or water containing organisms on the surface of the equipment. No source of bulk water is required to be heated durin... | 05/27/1997 |
| 4621179 | Microwave heating apparatus A microwave heating apparatus is arranged such that the output from a single semiconductor oscillator is divided into two parts by a power divider and the parts are amplified by a pair of respective amplifiers and the amplified parts are fed into a heatin... | 11/04/1986 |
| 4589424 | Microwave hyperthermia applicator with variable radiation pattern A direct contact microwave hyperthermia applicator includes a plurality of rectangular waveguide sections each having a radiating aperture. The waveguide sections are mounted with their long sides abutting. A pair of shutter elements for individually vary... | 05/20/1986 |
| 4446349 | Microwave phase shifting device An improved phase shifting device for varying the phase of the standing wave in a hollow rectangular waveguide is provided which is particularly applicable to microwave cooking appliances. A metallic septum is constructed at the end of the waveguide remot... | 05/01/1984 |
| 4336434 | Microwave oven cavity excitation system employing circularly polarized beam steering for uniformity of energy distribution and improved impedance matching A microwave oven cavity excitation system which introduces circularly-polarized electromagnetic wave energy into a cooking cavity through a plurality of feed points appropriately phased to provide a concentrated beam. The relative phasing of the feed poin... | 06/22/1982 |
| 4301347 | Feed system for microwave oven The heating uniformity of a microwave oven is significantly improved by a feed that radiates rotating elliptically polarized electromagnetic waves. A pair of crossed slots in the feed rectangular waveguide has directional characteristics and radiates ener... | 11/17/1981 |
| 4122323 | Phase shift device for microwave oven door seal A pair of phase shift devices is provided for sealing a microwave oven against the leakage of microwave energy. Each phase shift device is in the form of a conductive channel member having sides of unequal width. The narrower channel side is positioned pa... | 10/24/1978 |
| 4079221 | Microwave oven having waveguide feed with phase shifter A microwave oven using a waveguide feed to deliver microwave energy from a magnetron source to an oven cavity, wherein a substantially reflectionless phase shifter is interposed in the waveguide for adjusting the electrical characteristics thereof to caus... | 03/14/1978 |
| 4005301 | Microwave heat treating furnace A microwave furnace having a tunnel-like structure within which are arranged paired coherent sources of electromagnetic radiation that develop electromagnetic fields that have an interference pattern in which the average density of electromagnetic waves i... | 01/25/1977 |
