GB217574A - Improvements in illuminating devices for cinematographic projection apparatus - Google Patents

Improvements in illuminating devices for cinematographic projection apparatus

Info

Publication number
GB217574A
GB217574A GB13371/24A GB1337124A GB217574A GB 217574 A GB217574 A GB 217574A GB 13371/24 A GB13371/24 A GB 13371/24A GB 1337124 A GB1337124 A GB 1337124A GB 217574 A GB217574 A GB 217574A
Authority
GB
United Kingdom
Prior art keywords
filaments
projection apparatus
illuminating devices
circuit
cinematographic projection
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
GB13371/24A
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.)
ANDRE LEON VICTOR CLEMENT DEBR
Original Assignee
ANDRE LEON VICTOR CLEMENT DEBR
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 ANDRE LEON VICTOR CLEMENT DEBR filed Critical ANDRE LEON VICTOR CLEMENT DEBR
Publication of GB217574A publication Critical patent/GB217574A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K7/00—Lamps for purposes other than general lighting
    • H01K7/02—Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector

Landscapes

  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

217,574. Debrie, A. L. V. C. June 12, 1923, [Convention date]. Optical-projection apparatus.-The light source in a kinematograph projector comprises an incandescent electric lamp having two or more filaments of the same or different illuminating powers; the filaments may be used simultaneously or separately, and may be put into or out of circuit by hand control or by means operating automatically in accordance with the speed of the film. As shown, the lamp has three filaments 7, 8, 9 connected to four lead wires 3 - - 6. Automatic control may be effected by a centrifugal device operating a circuit-breaker.
GB13371/24A 1923-06-12 1924-05-30 Improvements in illuminating devices for cinematographic projection apparatus Expired GB217574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR217574X 1923-06-12

Publications (1)

Publication Number Publication Date
GB217574A true GB217574A (en) 1924-12-04

Family

ID=8881331

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13371/24A Expired GB217574A (en) 1923-06-12 1924-05-30 Improvements in illuminating devices for cinematographic projection apparatus

Country Status (1)

Country Link
GB (1) GB217574A (en)

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