Summary
GF1photoelectric cell. Gas-filled type made by General Electric, England, circa 1928.
Introduced by Otto Pressler of Leipzig.
Anode is a ring carrying an open gauze, cathode is potassium deposited on a silver coating on the glass and sensitised with hydrogen. Gas (helium) is at 0.75 mm Hg.
Physical Description
Hemispherical bulb with side arm carrying one cap, two exhaust tips and second side cap carrying cathode connection. Light sensitive section is coated with Potassium
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from S. Guest, 14 Feb 1942
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Manufacturer
General Electric Co, London, Middlesex, England, Great Britain, circa 1928
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Inscriptions
GEC LTD/TYPE GP1/OSRAM/PHOTOCELL/MADE IN ENGLAND
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Brand Names
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
102 mm (Length), 67 mm (Width), 49 mm (Height)
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References
"Television" July 1928, pages 34, 35. (sf 621.3848 T23).
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Keywords