GB206115A - Improvements in kinematograph apparatus - Google Patents

Improvements in kinematograph apparatus

Info

Publication number
GB206115A
GB206115A GB20213/23A GB2021323A GB206115A GB 206115 A GB206115 A GB 206115A GB 20213/23 A GB20213/23 A GB 20213/23A GB 2021323 A GB2021323 A GB 2021323A GB 206115 A GB206115 A GB 206115A
Authority
GB
United Kingdom
Prior art keywords
lens
tubes
lenses
turret
engaging
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
GB20213/23A
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.)
Continsouza SA Ets
Original Assignee
Continsouza SA Ets
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 Continsouza SA Ets filed Critical Continsouza SA Ets
Publication of GB206115A publication Critical patent/GB206115A/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
    • G03B19/00—Cameras
    • G03B19/18—Motion-picture cameras

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lens Barrels (AREA)

Abstract

206,115. Etablissements Continsouza Soc. Anon. Oct. 25, 1922, [Convention date]. Lens mounts.-The lenses in a lens turret for kinematograph apparatus are simultaneously focused by the provision of threaded rings surrounding tubes carrying the lenses and engaging threads or the like thereon, the rings being connected to a common operating member; means for indicating the Lens in use may be provided. As shown, the turret 2, carrying three lenses in externally-threaded tubes 10, is surrounded by a ring 1 having a toothed rack 1<1>. The ring is rotatable on the turret and has slots 5 engaging studs 6 in lugs 7<1> formed on threaded rings 7 engaging the tubes 10. The pitches of the threads vary in accordance with the focal lengths of the lenses so that equal rotations of the tubes 10 produce appropriate focusing displacements. The tubes 10 are prevented from rotating by the engagement of studs 13 in slots therein. The ring 1 is rotated by a pointer 17 moving over a focusing scale IS and arried by the shaft 15 of a toothed wheel 14 engaging the rack 1'. A pinion 19 on the shaft 15 engages a toothed wheel 20 bearing numbers visible through an opening 22 and indicating the lens in use. The gearing is such that rotation of the turret sufficient to substitute one lens for another causes the pointer 17 to make one rotation.
GB20213/23A 1922-10-25 1923-08-08 Improvements in kinematograph apparatus Expired GB206115A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR206115X 1922-10-25

Publications (1)

Publication Number Publication Date
GB206115A true GB206115A (en) 1924-02-07

Family

ID=8880396

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20213/23A Expired GB206115A (en) 1922-10-25 1923-08-08 Improvements in kinematograph apparatus

Country Status (1)

Country Link
GB (1) GB206115A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572729A (en) * 1948-03-16 1951-10-23 Pye Ltd Television camera focusing mechanism
US4204732A (en) * 1978-06-16 1980-05-27 Minolta Camera Kabushiki Kaisha Focus adjusting mechanism for variable magnification device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572729A (en) * 1948-03-16 1951-10-23 Pye Ltd Television camera focusing mechanism
US4204732A (en) * 1978-06-16 1980-05-27 Minolta Camera Kabushiki Kaisha Focus adjusting mechanism for variable magnification device

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