FR754593A - Improvements in photoelectric devices - Google Patents

Improvements in photoelectric devices

Info

Publication number
FR754593A
FR754593A FR754593DA FR754593A FR 754593 A FR754593 A FR 754593A FR 754593D A FR754593D A FR 754593DA FR 754593 A FR754593 A FR 754593A
Authority
FR
France
Prior art keywords
photoelectric devices
photoelectric
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 FR754593A publication Critical patent/FR754593A/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
    • H01J40/14—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
FR754593D 1932-04-28 1933-04-21 Improvements in photoelectric devices Expired FR754593A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US608087A US1939435A (en) 1932-04-28 1932-04-28 Photo-electric relay apparatus

Publications (1)

Publication Number Publication Date
FR754593A true FR754593A (en) 1933-11-09

Family

ID=24434972

Family Applications (1)

Application Number Title Priority Date Filing Date
FR754593D Expired FR754593A (en) 1932-04-28 1933-04-21 Improvements in photoelectric devices

Country Status (2)

Country Link
US (1) US1939435A (en)
FR (1) FR754593A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577973A (en) * 1948-07-22 1951-12-11 Photoswitch Inc Fire warning device
US2717316A (en) * 1952-12-24 1955-09-06 Madey Richard Pulse limiter and shaper
US2965813A (en) * 1954-10-26 1960-12-20 Gen Motors Corp Automatic headlight dimmer system

Also Published As

Publication number Publication date
US1939435A (en) 1933-12-12

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