WebRefrigeration and Air-Conditioning Patents, Part 1. Refrigeration and Air-Conditioning Patents, Part 2. Actual copies of all of the patents in the list can be accessed at the … WebThe idea for a refrigerator had come from Oliver Evans, also an American inventor. He conceived it in 1805 but he never built it. Perkins was granted the first patent for the vapor-compression refrigeration cycle, on August …
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WebEE Patent Associate Seeking a Patent Attorney with 2+ years patent drafting and prosecution experience. An electrical engineering or physics background is preferred. … WebA method to control an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and first and second electric machines to transmit power to an output member includes determining motor torque constraints and battery power constraints. A preferred output torque to an output member is determined that is … north carolina kindergarten age
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Web1932-01-11 Priority to US586015A priority Critical patent/US1954304A/en ... In operation. the trough 8 is first filled to the desired level with the anti-freeze liquid, which may be a brine or a glycerine solution. ... Mechanical refrigerator including a refrigerated chamber and a refrigerating system operating intermittently responsive to ... Ancient origins Ancient Iranians were among the first to invent a form of large evaporative cooler called yakhchāls using subterranean storage spaces, a large domed above-ground structure made with thick walls and outfitted with wind catchers (called "badgirs"), walled off further into a series of "qanats", a kind of aqueduct used i… Web7.1Compressor refrigerators 7.2Absorption refrigerator 7.3Peltier refrigerators 7.4Magnetic refrigerator 8Energy efficiency Toggle Energy efficiency subsection 8.1Today 8.1.1Auto defrosting 8.1.2Inverter … north carolina kayak fishing