The Bridgman seal seals a high pressure volume by the use of an unsupported area to create a higher pressure between two pistons. A viscous material such as copper or soap-stone is used in the generated higher pressure area to seal the intended pressure area.
Percy Williams Bridgman (April 21, 1882–August 20, 1961) was an American physicist who won the 1946 Nobel Prize in Physics for his work on the physics of high pressures.
With this new apparatus a plethora of new research was investigated, including research into the effect of pressure on electrical resistance, and solid and fluid conditions under pressure.
Bridgman is known also for his studies of electrical conduction in metals and properties of crystals and for his writings on the philosophy of modern science.
During a course of lectures that Bridgman gave in 1914 on advanced electrodynamics, he was struck by the obscurities and ambiguities inherent in defining scientific ideas.
Bridgman asserted that it is meaningless to interpret physical concepts except insofar as they are capable of observation.
Bridgman rose steadily through the hierarchical levels of university status, becoming a full professor at Harvard in 1919, Hollis professor in 1926, and Higgins professor in 1950.
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