GB415994A - Improvements relating to photo-electric tubes - Google Patents

Improvements relating to photo-electric tubes

Info

Publication number
GB415994A
GB415994A GB3380232A GB3380232A GB415994A GB 415994 A GB415994 A GB 415994A GB 3380232 A GB3380232 A GB 3380232A GB 3380232 A GB3380232 A GB 3380232A GB 415994 A GB415994 A GB 415994A
Authority
GB
United Kingdom
Prior art keywords
admitted
oxygen
photo
cathode
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3380232A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB3380232A priority Critical patent/GB415994A/en
Publication of GB415994A publication Critical patent/GB415994A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
    • H01J40/02—Details
    • H01J40/04—Electrodes
    • H01J40/06—Photo-emissive cathodes

Landscapes

  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

415,994. Photo electric cells. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Charlton, E. E. ; 6, Phoenix Avenue, Schenectady, New York, U.S.A.) Nov. 29, 1932, No. 33802. Void [Abridged as open to inspection under Sect. 91 of the Acts, June 2, 1933]. Drawings to Specification. [Class 39 (i).] In the manufacture of a photo-electric cathode, a foundation metal such as silver is oxidized by passing a glow discharge between the anode and cathode in oxygen, the cathode being connected with the negative terminal of its supply. Alkali metal is subsequently deposited on the oxidized surface. The envelope is heated to 350‹ C. during evacuation, oxygen is admitted at a pressure of 250-300 microns, and a glow discharge is passed, the voltage depending on the pressure of the oxygen. After caesium or rubidium has been admitted, the cell is heated to 275‹ C., excess metal is evacuated, argon at a pressure of 125 microns is admitted, and a glow discharge passed with the anode positive, as described in Specification 415,018. Specification 303,476, [Class 39 (i)], also is referred to.
GB3380232A 1932-11-29 1932-11-29 Improvements relating to photo-electric tubes Expired GB415994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3380232A GB415994A (en) 1932-11-29 1932-11-29 Improvements relating to photo-electric tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3380232A GB415994A (en) 1932-11-29 1932-11-29 Improvements relating to photo-electric tubes

Publications (1)

Publication Number Publication Date
GB415994A true GB415994A (en) 1934-09-06

Family

ID=10357623

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3380232A Expired GB415994A (en) 1932-11-29 1932-11-29 Improvements relating to photo-electric tubes

Country Status (1)

Country Link
GB (1) GB415994A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638108A (en) * 1949-06-24 1953-05-12 Power Brake Equipment Co Push-pull control valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638108A (en) * 1949-06-24 1953-05-12 Power Brake Equipment Co Push-pull control valve

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