GB201602A - Improvements in or relating to the projection of cinematograph pictures - Google Patents

Improvements in or relating to the projection of cinematograph pictures

Info

Publication number
GB201602A
GB201602A GB3501021A GB3501021A GB201602A GB 201602 A GB201602 A GB 201602A GB 3501021 A GB3501021 A GB 3501021A GB 3501021 A GB3501021 A GB 3501021A GB 201602 A GB201602 A GB 201602A
Authority
GB
United Kingdom
Prior art keywords
auxiliary
lantern
projector
auxiliary light
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
GB3501021A
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
Priority to GB3501021A priority Critical patent/GB201602A/en
Publication of GB201602A publication Critical patent/GB201602A/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
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/40—Eliminating or reducing effect of flicker

Landscapes

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

Abstract

201,602. Milne, J. S. March 8,1922. Kinematograph apparatus.-To eliminate flicker in an intermittent feed projector, the screen is illuminated by an auxiliary light beam during the periods of movement of the film, the intensity and colour of the auxiliary beam being regulated to correspond to those of the projecting light. The auxiliary light may be derived from the projector or from a separate source. Figs. 2 and 4 show an auxiliary lantern H, which is attached to the projector A and comprises condensers N, S, reflector M, and projecting lens T. The lantern H may also be provided with an adjustable erecting lens. The beams from the lanterns A, H are projected alternately by a rotary shutter K, Fig. 6, having central masking portions for the projection beam and annular masking portions for the auxiliary beam. The masking blades may be formed of uncoloured glass having a rippled surface. The intensity and colour of the auxiliary light are adjusted by slides inserted in the lantern H. In a modification, Fig. 11, the auxiliary light is derived from reflectors b on the shutter arranged, in conjunction with a fixed reflector, to project the auxiliary beam during the periods of observation of the projection beam.
GB3501021A 1922-03-08 1922-03-08 Improvements in or relating to the projection of cinematograph pictures Expired GB201602A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3501021A GB201602A (en) 1922-03-08 1922-03-08 Improvements in or relating to the projection of cinematograph pictures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3501021A GB201602A (en) 1922-03-08 1922-03-08 Improvements in or relating to the projection of cinematograph pictures

Publications (1)

Publication Number Publication Date
GB201602A true GB201602A (en) 1923-08-08

Family

ID=10372720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3501021A Expired GB201602A (en) 1922-03-08 1922-03-08 Improvements in or relating to the projection of cinematograph pictures

Country Status (1)

Country Link
GB (1) GB201602A (en)

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