FR719842A - Improvements to photoelectric cells - Google Patents

Improvements to photoelectric cells

Info

Publication number
FR719842A
FR719842A FR719842DA FR719842A FR 719842 A FR719842 A FR 719842A FR 719842D A FR719842D A FR 719842DA FR 719842 A FR719842 A FR 719842A
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.)
Parlophone Records Ltd
Original Assignee
Gramophone 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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Application granted granted Critical
Publication of FR719842A publication Critical patent/FR719842A/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
FR719842D 1930-11-21 1931-07-08 Improvements to photoelectric cells Expired FR719842A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB35180/30A GB367449A (en) 1930-11-21 1930-11-21 Improvements in or relating to photo-electric cells
GB723843X 1930-11-21
GB719842X 1930-11-21

Publications (1)

Publication Number Publication Date
FR719842A true FR719842A (en) 1932-02-10

Family

ID=27259270

Family Applications (1)

Application Number Title Priority Date Filing Date
FR719842D Expired FR719842A (en) 1930-11-21 1931-07-08 Improvements to photoelectric cells

Country Status (2)

Country Link
FR (1) FR719842A (en)
GB (1) GB367449A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755658C (en) * 1934-06-22 1953-08-10 Siemens & Halske A G Device for introducing filler into gas or vapor discharge apparatus
DE909143C (en) * 1948-10-02 1954-04-15 Optische Werke C A Steinheil S Process for the production of transparent reflection-increasing or -reducing surface layers on glasses or other light-reflecting materials

Also Published As

Publication number Publication date
GB367449A (en) 1932-02-22

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