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GB711478A - Improvements relating to the projection of cinematograph films - Google Patents

Improvements relating to the projection of cinematograph films

Info

Publication number
GB711478A
GB711478A GB2104/51A GB210451A GB711478A GB 711478 A GB711478 A GB 711478A GB 2104/51 A GB2104/51 A GB 2104/51A GB 210451 A GB210451 A GB 210451A GB 711478 A GB711478 A GB 711478A
Authority
GB
United Kingdom
Prior art keywords
trace
film
parts
conductive
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
GB2104/51A
Inventor
William James Foy
Thomas Robinson
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.)
ESSOLDO CIRCUIT CONTROL Ltd
Original Assignee
ESSOLDO CIRCUIT CONTROL Ltd
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 ESSOLDO CIRCUIT CONTROL Ltd filed Critical ESSOLDO CIRCUIT CONTROL Ltd
Priority to GB2104/51A priority Critical patent/GB711478A/en
Publication of GB711478A publication Critical patent/GB711478A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Camera Bodies And Camera Details Or Accessories (AREA)

Abstract

711,478. Kinematograph films and projectors. ESSOLDO CIRCUIT (CONTROL), Ltd. Dec. 14, 1951 [Jan. 26, 1951], No. 2104/51. Drawings to Specification. Classes.97(1) and 98(2) A film carries a conductive trace arranged to run past and bridge two contacts disposed in the grid circuit of a thermionic device so as to pass only grid current. The trace may be disposed in one film margin and may be of a length depending on the length of contact required, or may have parts in both margins connected by one or more parts in spaces between frames. The trace may be of metallic paint or, to avoid interference with a sound track, of a colourless conductive lacquer. The conductive trace may be carried on an auxiliary film fed concurrently with main film. Specification 711,479 is referred to.
GB2104/51A 1951-01-26 1951-01-26 Improvements relating to the projection of cinematograph films Expired GB711478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2104/51A GB711478A (en) 1951-01-26 1951-01-26 Improvements relating to the projection of cinematograph films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2104/51A GB711478A (en) 1951-01-26 1951-01-26 Improvements relating to the projection of cinematograph films

Publications (1)

Publication Number Publication Date
GB711478A true GB711478A (en) 1954-07-07

Family

ID=9733689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2104/51A Expired GB711478A (en) 1951-01-26 1951-01-26 Improvements relating to the projection of cinematograph films

Country Status (1)

Country Link
GB (1) GB711478A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016790A (en) * 1956-08-22 1962-01-16 Nakamatsu Yoshiro Movie system adapted for simultane-ously enlarging and reducing a projected image and the area of an associated screen
US3578852A (en) * 1968-06-10 1971-05-18 Bell & Howell Co Motion picture apparatus having sensing means for film carried cue signals
US3640611A (en) * 1969-11-21 1972-02-08 Eprad Inc Control for motion picture projectors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016790A (en) * 1956-08-22 1962-01-16 Nakamatsu Yoshiro Movie system adapted for simultane-ously enlarging and reducing a projected image and the area of an associated screen
US3578852A (en) * 1968-06-10 1971-05-18 Bell & Howell Co Motion picture apparatus having sensing means for film carried cue signals
US3640611A (en) * 1969-11-21 1972-02-08 Eprad Inc Control for motion picture projectors

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