GB336556A - Improvements relating to cinematograph projection apparatus - Google Patents

Improvements relating to cinematograph projection apparatus

Info

Publication number
GB336556A
GB336556A GB1727129A GB1727129A GB336556A GB 336556 A GB336556 A GB 336556A GB 1727129 A GB1727129 A GB 1727129A GB 1727129 A GB1727129 A GB 1727129A GB 336556 A GB336556 A GB 336556A
Authority
GB
United Kingdom
Prior art keywords
casing
lamp
motor
air
resistance
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
GB1727129A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB1727129A priority Critical patent/GB336556A/en
Publication of GB336556A publication Critical patent/GB336556A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Abstract

336,556. Groves, W. W., (I. G. Farbenindustrie. Akt.-Ges.). June 5, 1929. Kinematograph apparatus. - In projectors, particularly for use with narrow films, in which aircooled electrical resistances are used. a casing 8 of small dimensions and directly in communication with a ventilating fan 5 houses resistances 9 such as those included in the lamp or motor circuits. Preferably the fan is. mounted on the shaft of the motor 1 and is arranged to draw in air through the motor windings. In the arrangement described. the resistance easing has an opening 10 at its upper end leading into the lamp casing 11 so that the hot air from the former creates a draught of coal air through the latter by way of apertures in the lamp holder 15. An adjustable flap 12 at the top of the resistance casing controls the ventilating device.
GB1727129A 1929-06-05 1929-06-05 Improvements relating to cinematograph projection apparatus Expired GB336556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1727129A GB336556A (en) 1929-06-05 1929-06-05 Improvements relating to cinematograph projection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1727129A GB336556A (en) 1929-06-05 1929-06-05 Improvements relating to cinematograph projection apparatus

Publications (1)

Publication Number Publication Date
GB336556A true GB336556A (en) 1930-10-06

Family

ID=10092259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1727129A Expired GB336556A (en) 1929-06-05 1929-06-05 Improvements relating to cinematograph projection apparatus

Country Status (1)

Country Link
GB (1) GB336556A (en)

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