Patent Drawing for Abbot's Pyrheliometer

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Patent drawing for Astrophysicist Charles Greeley Abbot's (Fifth Secretary of the Smithsonian Institution, 1928-1944) silver disk pyrheliometer. Corresponds to patent # 2,247,830 of July 1, 1941.


  • Abbot, C. G (Charles Greeley) b. 1872
  • Smithsonian Astrophysical Observatory


Historic Images of the Smithsonian


There are many other examples of instruments that Secretary Abbot worked with and/or invented at this SIA location.

Contained within

Smithsonian Institution Archives, Record Unit 7005, Box 187, Folder: 12

Contact information

Institutional History Division, Smithsonian Institution Archives, 600 Maryland Avenue, S.W., Washington, D.C. 20024-2520,



Restrictions & Rights

No restrictions


  • Patents
  • Observatories
  • Secretariats
  • Astrophysics
  • Instruments
  • Secretaries
  • Inventions
  • Silver Disk Pyrheliometer


  • Photographic print
  • Drawing

ID Number

32803-A or MAH-32803A

Physical description

Color: Black and White; Size: 10w x 8h; Type of Image: Drawing; Medium: Photographic print

Full Record

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