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Earl H Christopher

from East Walpole, MA
Age ~95

Earl Christopher Phones & Addresses

  • 27 Thornell Ave, East Walpole, MA 02032 (508) 668-3496
  • 545 Common St, Walpole, MA 02081 (508) 660-9657
  • Concord, NH
  • Harwich, MA
  • Millis, MA

Resumes

Resumes

Earl Christopher Photo 1

Earl Christopher

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Industry:
Construction
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Earl Christopher

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Earl Christopher Photo 3

Earl Christopher

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Location:
United States

Publications

Wikipedia

Edgar Earl Christopher

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Edgar Earl Christopher was an early 20th century novelist noted for writing The Invisibles, a novel about an American terrorist organization plotting to ...

Us Patents

Seal-Less Cryogenic Expander

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US Patent:
47116501, Dec 8, 1987
Filed:
Sep 4, 1986
Appl. No.:
6/903540
Inventors:
Lawrence E. Faria - Hudson MA
Earl H. Christopher - Lynnfield MA
Assignee:
Raytheon Company - Lexington MA
International Classification:
F25B 900
US Classification:
62 6
Abstract:
A cryogenic refrigerator operating on the Split-Sterling cycle principle is disclosed. The refrigerator has a seal-less expander and achieves efficient operation without the use of external control apparatus. This is accomplished by sizing the expander so that two pressure differential forces developed across a displacer in the expander are approximately equal in magnitude. For efficient operation, the expander's gas flow rate is selected to provide the proper time delay between the two pressure differential forces.
Earl H Christopher from East Walpole, MA, age ~95 Get Report