FR2331057A1 - Cinematography film drive - uses a ratchet operated by a cam to achieve discontinuous film motion - Google Patents

Cinematography film drive - uses a ratchet operated by a cam to achieve discontinuous film motion

Info

Publication number
FR2331057A1
FR2331057A1 FR7616934A FR7616934A FR2331057A1 FR 2331057 A1 FR2331057 A1 FR 2331057A1 FR 7616934 A FR7616934 A FR 7616934A FR 7616934 A FR7616934 A FR 7616934A FR 2331057 A1 FR2331057 A1 FR 2331057A1
Authority
FR
France
Prior art keywords
film
motion
rachet
cam
drive
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.)
Granted
Application number
FR7616934A
Other languages
French (fr)
Other versions
FR2331057B3 (en
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.)
Staar SA
Original Assignee
Staar SA
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
Priority claimed from BE157066A external-priority patent/BE829918A/en
Priority claimed from BE6045515A external-priority patent/BE842293A/en
Application filed by Staar SA filed Critical Staar SA
Publication of FR2331057A1 publication Critical patent/FR2331057A1/en
Application granted granted Critical
Publication of FR2331057B3 publication Critical patent/FR2331057B3/fr
Granted 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
    • G03B21/43—Driving mechanisms
    • G03B21/44—Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed
    • 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
    • G03B1/00—Film strip handling
    • G03B1/18—Moving film strip by means which act on the film between the ends thereof
    • G03B1/20—Acting means
    • G03B1/24—Sprockets engaging holes in the film

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Cameras In General (AREA)

Abstract

The cinematography film drive mechanism moves the film the required discontinuous stop-go motion by means of a sprocket wheel driven by a rachet controlled by a cam. The film (3) is moved past the optical aperture (5) by means of sprockets (2) engaging in holes (4) in the film. The sprocket-wheel (1) is turned in a stepped motion by means of a rachet (1a). The two sides of the rachet (8, 9) are kept in contact with a spring (19). The drive motion comes from a bracket (13, 15, 16) pivoting around a shaft (6) concentric with the sprocket wheel, and engaging with a pin (12) on the rachet. A cam (18) and a spring (17) cause the bracket (13, 15, 16) to move to and fro (14) to drive the rachet. Reverse motion of the sprocket wheel is prevented by a lever (23).
FR7616934A 1975-06-05 1976-06-04 Cinematography film drive - uses a ratchet operated by a cam to achieve discontinuous film motion Granted FR2331057A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE157066A BE829918A (en) 1975-06-05 1975-06-05 DRIVE SYSTEM FOR PERFORATED FILMS
BE6045515A BE842293A (en) 1976-05-26 1976-05-26 TRAINING DEVICE BY SACCADES FOR PERFORATED FILM.

Publications (2)

Publication Number Publication Date
FR2331057A1 true FR2331057A1 (en) 1977-06-03
FR2331057B3 FR2331057B3 (en) 1979-02-23

Family

ID=25648651

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7616934A Granted FR2331057A1 (en) 1975-06-05 1976-06-04 Cinematography film drive - uses a ratchet operated by a cam to achieve discontinuous film motion

Country Status (4)

Country Link
CH (1) CH597611A5 (en)
DE (1) DE2625050A1 (en)
FR (1) FR2331057A1 (en)
IT (1) IT1079524B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0334333A2 (en) * 1988-03-23 1989-09-27 VEB DEFA Studio für Spielfilme Device for automatically loading and unloading of a photographic film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0334333A2 (en) * 1988-03-23 1989-09-27 VEB DEFA Studio für Spielfilme Device for automatically loading and unloading of a photographic film
EP0334333A3 (en) * 1988-03-23 1991-04-03 VEB DEFA Studio für Spielfilme Device for automatically loading and unloading of a photographic film

Also Published As

Publication number Publication date
IT1079524B (en) 1985-05-13
DE2625050A1 (en) 1976-12-23
FR2331057B3 (en) 1979-02-23
CH597611A5 (en) 1978-04-14

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