FR668997A - Improvements to photoelectric cells - Google Patents

Improvements to photoelectric cells

Info

Publication number
FR668997A
FR668997A FR668997DA FR668997A FR 668997 A FR668997 A FR 668997A FR 668997D A FR668997D A FR 668997DA FR 668997 A FR668997 A FR 668997A
Authority
FR
France
Prior art keywords
photoelectric cells
photoelectric
cells
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
Other languages
French (fr)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR668997A publication Critical patent/FR668997A/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
FR668997D 1928-01-04 1929-01-04 Improvements to photoelectric cells Expired FR668997A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US668997XA 1928-01-04 1928-01-04
US303476TA 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
FR668997A true FR668997A (en) 1929-11-08

Family

ID=31950926

Family Applications (1)

Application Number Title Priority Date Filing Date
FR668997D Expired FR668997A (en) 1928-01-04 1929-01-04 Improvements to photoelectric cells

Country Status (2)

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

Families Citing this family (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
GB319734A (en) 1930-09-25

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