US1334337A - Sprocket-cleaner for film-advancing apparatus - Google Patents

Sprocket-cleaner for film-advancing apparatus Download PDF

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Publication number
US1334337A
US1334337A US248671A US24867118A US1334337A US 1334337 A US1334337 A US 1334337A US 248671 A US248671 A US 248671A US 24867118 A US24867118 A US 24867118A US 1334337 A US1334337 A US 1334337A
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United States
Prior art keywords
film
sprocket
cleaner
advancing apparatus
advancing
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Expired - Lifetime
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US248671A
Inventor
Wenderhold William
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CRU PATENTS Corp
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CRU PATENTS CORP
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Priority to US248671A priority Critical patent/US1334337A/en
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    • 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
    • G03B1/42—Guiding, framing, or constraining film in desired position relative to lens system

Definitions

  • This invention relates to an improvement in film feeding mechanism.
  • the object of this invention is to provide means which will keep the periphery of a film advancing wheel absolutely free from dirt and deposits that otherwise accumulate thereon.
  • motion picture film deposits dust and dirt on the periphery of sprockets, thereby injuring the accurate advancement of films, which is ab solutely essential for the production of a perfect picture.
  • Figure 1 is a side elevation of a motion picture projecting apparatus embodying my device, partly in cross-section.
  • I provide a rotating brush 1 behind a film sprocket, preferably the intermittently rotating sprocket, said brush 1 being mounted upon a shaft 2, which shaft has a spiral gear 3 driven by the spiral gear 4:, which gear 4: is in mesh wi 11 the gear 5, which is part of the general operating mechanism of a moving picture machine.
  • the film F is advanced by the well known feed sprockets 6 and 7. It is then advanced intermittently by the sprocket 8, behind which I have placed my improvement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Displays For Variable Information Using Movable Means (AREA)

Description

W. WENDERHOLD. v
SPROCKET CLEANER FOR FILM ADVANCING APPARATUS.
APPLICATION FILED AUG-7, 191a.
1,334,337. Patented M31123, 1920.
- wue nfoz $3713 atto'mmn WILLIAM WENDERHOLD, on NEW YORK,
N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, T0
CRU PATENTS CORPORATION, A CORPORATION OF NEW YORK.
SPROCKET-GLEANER FOR FILIVI-ADVANCING APPARATUS.
Specification of Letters Patent.
Patented Mar. 23, 1920.
Application filed August 7, 1918. Serial No. 248,671.
To all whom it may concern:
Be it known that 1, WILLIAM WENDER- HOLD, a citizen of the United States, residing at New York, in the county and State of New York, have. invented certain new and useful Improvements in Sprocket- Cleaners for Film-Advancing Apparatus, of which the following is a clear, full, and exact description.
This invention relates to an improvement in film feeding mechanism.
The object of this invention is to provide means which will keep the periphery of a film advancing wheel absolutely free from dirt and deposits that otherwise accumulate thereon.
It is a well known fact to operators of motion picture apparatus, that motion picture film deposits dust and dirt on the periphery of sprockets, thereby injuring the accurate advancement of films, which is ab solutely essential for the production of a perfect picture.
Referring to my drawings,
Figure 1 is a side elevation of a motion picture projecting apparatus embodying my device, partly in cross-section.
To accomplish the object in view, I provide a rotating brush 1 behind a film sprocket, preferably the intermittently rotating sprocket, said brush 1 being mounted upon a shaft 2, which shaft has a spiral gear 3 driven by the spiral gear 4:, which gear 4: is in mesh wi 11 the gear 5, which is part of the general operating mechanism of a moving picture machine.
The film F is advanced by the well known feed sprockets 6 and 7. It is then advanced intermittently by the sprocket 8, behind which I have placed my improvement.
It is easily understood that by means of the constantly rotating brush 1, the periphery of the film sprocket 8 is kept perfectly clean, thereby insuring perfect intermittent advancement of the film strip F.
\Vhile I have shown and described a specific structure embodying the principles of my invention, I wish it to be understood that my invention in its broad scope as defined by the claims is not to be limited or restricted thereto, as many changes in details of construction will readily appear to those skilled in the art without departing from the contemplated spirit and scope of my invention.
lVhat I claim as my invention is:
1. In a motion picture apparatus the combination with film feed sprockets of rotary means to prevent the accumulation of deposits on the peripheries thereof.
2. In a motion picture apparatus the combination with film feed sprockets, a brush in contact with said sprockets to prevent the accumulation of dirt deposits on the periph cry of said sprockets and means to actuate said brush.
Signed at the city, county and State of New York, this 17th day of July, one thousand nine hundred and eighteen.
WILLIAM WENDERHOLD.
US248671A 1918-08-07 1918-08-07 Sprocket-cleaner for film-advancing apparatus Expired - Lifetime US1334337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US248671A US1334337A (en) 1918-08-07 1918-08-07 Sprocket-cleaner for film-advancing apparatus

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US248671A US1334337A (en) 1918-08-07 1918-08-07 Sprocket-cleaner for film-advancing apparatus

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072198A2 (en) * 1981-08-06 1983-02-16 Imax Systems Corporation A film support element assembly for a projector, camera, and like apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072198A2 (en) * 1981-08-06 1983-02-16 Imax Systems Corporation A film support element assembly for a projector, camera, and like apparatus
EP0072198A3 (en) * 1981-08-06 1983-07-20 Imax Systems Corporation A film support element assembly, and a projector, camera, and like apparatus incorporating such an assembly

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