GB319734A - Improvements in and relating to photo-electric cells - Google Patents

Improvements in and relating to photo-electric cells

Info

Publication number
GB319734A
GB319734A GB26890/29A GB2689029A GB319734A GB 319734 A GB319734 A GB 319734A GB 26890/29 A GB26890/29 A GB 26890/29A GB 2689029 A GB2689029 A GB 2689029A GB 319734 A GB319734 A GB 319734A
Authority
GB
United Kingdom
Prior art keywords
coated
metal
heating
disc
silver
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
GB26890/29A
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
Priority claimed from US244533A external-priority patent/US1901577A/en
Priority claimed from US308715A external-priority patent/US1843728A/en
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB319734A publication Critical patent/GB319734A/en
Priority claimed from US621499A external-priority patent/US1901578A/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
    • 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

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

319,734. British Thomson-Houston Co., Ltd., (Assignees of Mesick, H. F.). Sept. 27, 1928, [Conventioi-t date]. Addition to 303,476. Vacuum tubes. - A photo-electric cell according to the parent Specification is provided with a member coated with a substance which is capable of absorbing all the free alkali or alkaline earth metal other than that forming the electrode. A nickel or other metal disc 6 is preferably coated with finely divided carbon such as a colloidal suspension of graphite in water. The necessity for baking the cell to 300‹ C. to remove excess alkali &c. metal as described in the parent Specification is thereby avoided. Alkali &c. metal may be driven off from the coated member during operation of the cell by heating. A silver bead, not shown, is mounted on a filament 7 and is vaporized by heating the filament so as to form a deposit on the envelope, the anode 8 preventing deposition on the window 11, and a glass disc 12 prevents deposition on the neck. The silver coating is oxidized by admitting oxygen at a pressure of 1 to 2 mm. of mercury and heating the bulb in an exhaust oven to 360‹ C.; or a high voltage, high frequency potential may be applied between the cathode and anode. Caesium, rubidium, or potassium is admitted through an extension 14, and the coated disc 6 is heated to prevent absorption of caesium. &c. thereby. Instead of silver, the foundation metals deposited on the envelope, or on plates or cylinders may consist of magnesium, calcium, copper, nickel, tungsten, or barium. Reference has been directed by the Comptroller to Specification 317,209.
GB26890/29A 1928-01-04 1929-09-04 Improvements in and relating to photo-electric cells Expired GB319734A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US303476TA 1928-01-04 1928-01-04
US668997XA 1928-01-04 1928-01-04
US244533A US1901577A (en) 1928-01-04 1928-01-04 Photo-electric tube
US319734XA 1928-09-27 1928-09-27
US308715A US1843728A (en) 1928-09-27 1928-09-27 Photo-electric tube
US621499A US1901578A (en) 1928-01-04 1932-07-08 Method of preparing photo-electric tubes

Publications (1)

Publication Number Publication Date
GB319734A true GB319734A (en) 1930-09-25

Family

ID=31950926

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26890/29A Expired GB319734A (en) 1928-01-04 1929-09-04 Improvements in and relating to photo-electric cells

Country Status (2)

Country Link
FR (1) FR668997A (en)
GB (1) GB319734A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744456C (en) * 1933-07-08 1944-01-19 Zeiss Ikon Ag Process for the production of highly sensitive photoelectric cells

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744456C (en) * 1933-07-08 1944-01-19 Zeiss Ikon Ag Process for the production of highly sensitive photoelectric cells

Also Published As

Publication number Publication date
FR668997A (en) 1929-11-08

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