FR746433A - Improvements to photo-sensitive devices - Google Patents

Improvements to photo-sensitive devices

Info

Publication number
FR746433A
FR746433A FR746433DA FR746433A FR 746433 A FR746433 A FR 746433A FR 746433D A FR746433D A FR 746433DA FR 746433 A FR746433 A FR 746433A
Authority
FR
France
Prior art keywords
photo
sensitive devices
sensitive
devices
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
Application filed by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR746433A publication Critical patent/FR746433A/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
FR746433D 1931-11-27 1932-11-25 Improvements to photo-sensitive devices Expired FR746433A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US746433XA 1931-11-27 1931-11-27

Publications (1)

Publication Number Publication Date
FR746433A true FR746433A (en) 1933-05-29

Family

ID=22120751

Family Applications (1)

Application Number Title Priority Date Filing Date
FR746433D Expired FR746433A (en) 1931-11-27 1932-11-25 Improvements to photo-sensitive devices

Country Status (1)

Country Link
FR (1) FR746433A (en)

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