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The Einstein–Szilard or Einstein refrigerator is an absorption refrigerator which has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was jointly invented in 1926 by Albert Einstein and his former student Leó Szilárd , who patented it in the U.S. on November 11, 1930 ( U.S. patent 1,781,541 ).
1949 – S.G. Sydoriak, E.R. Grilly, E.F. Hammel, first measurements on pure 3He in the 1 K range; 1950 – Invention of the so-called Gifford-McMahon cooler by K.W. Taconis (patent US2,567,454) 1951 – Heinz London invents the principle of the dilution refrigerator; 1955 – Willi Becker turbomolecular pump concept [15]
In 1926, Einstein and his former student Leó Szilárd co-invented (and in 1930, patented) the Einstein refrigerator. This absorption refrigerator was then revolutionary for having no moving parts and using only heat as an input. [303] On 11 November 1930, U.S. patent 1,781,541 was awarded
The Einstein refrigerator is invented by Albert Einstein and Leo Szilard. Ulster-born engineer Harry Ferguson is granted a British patent for his 'Duplex' hitch linking tractor and plough. German engineer Andreas Stihl patents and develops an electric chainsaw. [21]
A Crosley IcyBall with cold side ball on left, hot side ball on right. Icyball is a name given to two early refrigerators, one made by Australian Sir Edward Hallstrom in 1923, and the other design patented by David Forbes Keith of Toronto (filed 1927, granted 1929), [1] [2] and manufactured by American Powel Crosley Jr., who bought the rights to the device.
The Leahy-Smith America Invents Act (AIA) became fully effective in March 2013, and its impact over the last five years continues to disrupt U.S. patent practice.
As interest in taking glucagon-like peptide-1 receptor agonist (GLP-1 agonist) medications, such as Zepbound and Wegovy, for weight loss, research continues to examine potential new side effects ...
(1) "In 1926, Albert Einstein and former student Leó Szilárd co-invented a unique type of refrigerator (usually called "The Einstein Refrigerator")." Although, this is factually correct but they dont claim to have invented a perpetual motion machine, but a fridge..