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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).
General Electric "Monitor-Top" refrigerator, introduced in 1927, priced at $525, with the first all-steel cabinet, designed by Christian Steenstrup [24] The first refrigerator to see widespread use was the General Electric "Monitor-Top" refrigerator introduced in 1927, so-called, by the public, because of its resemblance to the gun turret on ...
In 1927, Loftus P. Perkins, a descendant, lectured on these boilers and displayed a 1 ⁄ 8 in (3.2 mm) copper pipe, apparently from a 40 bhp (30 kW) engine of a type that was in use up until 1918. [8] Perkins' high-pressure steam technology was also used in another invention, the steam gun.
In 1927, GE released the Monitor Top, the first refrigerator to run on electricity. [35] In 1930, Frigidaire, one of GE's main competitors, synthesized Freon. [36] With the invention of synthetic refrigerants based mostly on a chlorofluorocarbon (CFC) chemical, safer refrigerators were possible for home and consumer use. Freon led to the ...
He also invented a device to combine sound with motion pictures. [18] This attracted the attention of local entrepreneur Joseph A. Numero of Minneapolis, Minnesota . Numero owned a company that manufactured audio equipment called Ultraphone Sound Systems Inc. and was later renamed Cinema Supplies Inc. [ 18 ] He hired Jones in 1927 as an ...
1927 Bread slicer. Sliced bread is a loaf of bread which has been pre-sliced and packaged for commercial convenience. The automatic commercial bread slicer was invented in 1927 by Otto Frederick Rohwedder. His machine both sliced and wrapped a loaf of bread. In 1928, the bread slicer was improved by Gustav Papendick, a baker from St. Louis ...
The invention of the pop-up toaster in 1926 superseded Copeman's innovations, however. ... 1927. Refrigerator construction. No. 1,644,981; October 11
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.