GB643648A - Improvements in and relating to cinematographic projection apparatus - Google Patents

Improvements in and relating to cinematographic projection apparatus

Info

Publication number
GB643648A
GB643648A GB1137946A GB1137946A GB643648A GB 643648 A GB643648 A GB 643648A GB 1137946 A GB1137946 A GB 1137946A GB 1137946 A GB1137946 A GB 1137946A GB 643648 A GB643648 A GB 643648A
Authority
GB
United Kingdom
Prior art keywords
film
pins
gate
radiolocation
gates
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
GB1137946A
Inventor
Joseph Hewitt
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.)
Minister of Supply In Her Majesty S Government
Original Assignee
Minister of Supply In Her Majesty S Government
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 Minister of Supply In Her Majesty S Government filed Critical Minister of Supply In Her Majesty S Government
Priority to GB1137946A priority Critical patent/GB643648A/en
Publication of GB643648A publication Critical patent/GB643648A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/04—Display arrangements
    • 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
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/08—Trick photography

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Displays For Variable Information Using Movable Means (AREA)

Abstract

643,648. Radiolocation. MINISTER OF SUPPLY. April 12, 1946, No. 11379. [Class 40 (vii)] [Also in Group XX] Relates to apparatus in which pictures, particularly of a radiolocation display screen, are recorded in adjacent positions along a film and are required to be presented at a higher repetition frequency than the recording frequency as described in Specification 643,263. A plurality of uniformly-spaced projection gates 11A &c. is provided for a plurality of successive pictures, film locating means such as pins 25 being associated with each gate together with film tensioning means to keep the film flat, such as spring-urged rollers 26 which depress the film into recesses in the platen in which the gate apertures are formed. The rollers 26 and the pins 25 are lifted to allow the film to be drawn through by the sprocket 2. The gate spacing is slightly less than the length of film fed, as determined by the device 8 having register-pins movable into and out of the film and moved in the direction of film travel between adjustable stops. Mirrors 14 are provided in the light beams from the gates and further mirrors 17, 18, 19, 20, 21 on angularly-spaced arms on a shaft 15 reflect the beams in succession through the projection system 16, 22. Specification 637,784, [Group XX], also is referred to.
GB1137946A 1946-04-12 1946-04-12 Improvements in and relating to cinematographic projection apparatus Expired GB643648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1137946A GB643648A (en) 1946-04-12 1946-04-12 Improvements in and relating to cinematographic projection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1137946A GB643648A (en) 1946-04-12 1946-04-12 Improvements in and relating to cinematographic projection apparatus

Publications (1)

Publication Number Publication Date
GB643648A true GB643648A (en) 1950-09-27

Family

ID=9985152

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1137946A Expired GB643648A (en) 1946-04-12 1946-04-12 Improvements in and relating to cinematographic projection apparatus

Country Status (1)

Country Link
GB (1) GB643648A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245749A (en) * 1962-11-05 1966-04-12 Optomechanisms Inc Time compression projector
US3245747A (en) * 1962-11-05 1966-04-12 Optomechanisms Inc Means for animating cathode ray tube displays

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245749A (en) * 1962-11-05 1966-04-12 Optomechanisms Inc Time compression projector
US3245747A (en) * 1962-11-05 1966-04-12 Optomechanisms Inc Means for animating cathode ray tube displays

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