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FR505630A - Improvements in devices for the projection of light - Google Patents

Improvements in devices for the projection of light

Info

Publication number
FR505630A
FR505630A FR505630A FR505630DA FR505630A FR 505630 A FR505630 A FR 505630A FR 505630 A FR505630 A FR 505630A FR 505630D A FR505630D A FR 505630DA FR 505630 A FR505630 A FR 505630A
Authority
FR
France
Prior art keywords
projection
devices
light
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
FR505630A
Other languages
French (fr)
Inventor
Joseph Theodore Robin
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR505630A publication Critical patent/FR505630A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B31/00—Electric arc lamps
    • H05B31/003—Electric arc lamps of a special type
    • H05B31/0039—Projectors, the construction of which depends upon the presence of the arc
FR505630A 1918-11-14 1919-10-31 Improvements in devices for the projection of light Expired FR505630A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB505630X 1918-11-14

Publications (1)

Publication Number Publication Date
FR505630A true FR505630A (en) 1920-08-03

Family

ID=10456373

Family Applications (1)

Application Number Title Priority Date Filing Date
FR505630A Expired FR505630A (en) 1918-11-14 1919-10-31 Improvements in devices for the projection of light

Country Status (1)

Country Link
FR (1) FR505630A (en)

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