US3833292A - Motion picture camera comprising an externally attached detachable cassette - Google Patents

Motion picture camera comprising an externally attached detachable cassette Download PDF

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Publication number
US3833292A
US3833292A US00236610A US23661072A US3833292A US 3833292 A US3833292 A US 3833292A US 00236610 A US00236610 A US 00236610A US 23661072 A US23661072 A US 23661072A US 3833292 A US3833292 A US 3833292A
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US
United States
Prior art keywords
cassette
film
camera
motion picture
stops
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 - Lifetime
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US00236610A
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English (en)
Inventor
O Blaschek
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19712114485 external-priority patent/DE2114485C3/de
Application filed by Individual filed Critical Individual
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Publication of US3833292A publication Critical patent/US3833292A/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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/26—Holders for containing light sensitive material and adapted to be inserted within the camera
    • G03B17/265—Holders for containing light sensitive material and adapted to be inserted within the camera specially adapted for motion picture film, e.g. cassettes

Definitions

  • the film is nolonger properly guided. If the spring force is increased to prevent a lifting of the pressure plate, the risk of a tearing of the per- It is alsodesired to exchange the cassette as quickly as possible so that the camera is again ready for operation.
  • the film path means of the cassette must be mounted in a proper orientation on the filmguide of the camera body and must be reliably'held in position when a satisfactory operation is to be ensured. Known camerasdo not sufficiently meet these requirements. Inaccuracies in the manufacture may even increase the posed according to the invention to resiliently cushion either the film path means of the cassette, whichfilm path means carry the stops, or the film guide of the camera body, which filmguide is provided with the abutment ledges.
  • the film path means of the camera or the film guide of the camera body yields resiliently when the stops abut the ledges so that a proper fit and a satisfactory configuration of the rigid film channel are ensured whereas there is no need to adhere to very small toleran'ces in the manufacture of the. locking means for the cassette and of the ledges and stops which form the rigid film channel.
  • a spring-loaded pressure plate bearing on the moving film is suitably provided adjacent to the film gate.
  • the film is exactly guided only adjacent to the film gate, where such exact guidance is required to ensure high-quality pictures.
  • the film can move in the rigid film channel without being exposed to a substantial wear or substantial stresses by friction.
  • a rigid film channel is defined outside the film gate region between the camera body and the cassette when the cassette is attached to the camera body.
  • This rigid filrn channel permits of a satisfactory, low-friction guidance of the film so that the manipulation of the camera is improved and its satisfactory operation is ensured. Even at high speeds, the film is well protected in the film channel according to'the invention and need not be guided by pressure plates biased by large spring.
  • the cassette is held by locking means when it is attached on the camera body,'it is difficult in the manufacture'of the camera to ensure an exact fitting of the stops on the film path means of the cassette on the abutment ledges of the camera body.
  • it is-pro-
  • it must be possible easily to load the-film into the cassette and to remove the film from the cassette.
  • it is an advantageous feature of the motion picture camera that the-single-chamber cassette is diagonally divided. This is suitably accomplished'by the use of a hinged cover, which diagonally divides the cassette.
  • FIG. 1 is a side elevation showing the cassette
  • FIG. 2 is a front elevation showing the cassette without a cassette cover
  • FIG. 3 is a sectional view taken on line A-B of FIG. 2,
  • FIG. 4 is a top plan view showing the film path means of the cassettewithout a loop former
  • FIG. 10 is an enlarged front elevation showing the track for the film cassette
  • FIG. 11 is a side elevation showing the camera body.
  • a cassette cover 2 of a I cassette 1 can be swung about a hinge 3.
  • the-cassette is diagonally divided by the cassette cover 2 along a diagonal which extends approximately from the hinges 3 disposed at the lower edge of the top of the cassette to locking means 4 provided in the lower portion of the forward face of the cassette 1.
  • FIG. 2 is a front elevation showing the cassette 1 with the cassette cover 2 removed.
  • the housing provided adjacent to the film path means 5 and to a loop former 6 detachably mounted thereon is shown partly in section.
  • the loop former is no part of the present invention.
  • the detent projections 8 and 10 of the cassette I serve to retain the same on the motion picture camera body.
  • FIG. 4 is a top planview showing film path means withouta loop former.
  • stops 25 bear on abutment ledges 26 of the motion picture camera body (see FIG. 9). Because the stops 25 rest on the ledges 26, the formation of a rigid film channelhaving constant dimensions is ensured. Only adjacent to film'gate 27 (FIG. 9) does a spring-loaded pressure plate 28 (FIG. 4) bear on the moving film.
  • FIG. 8 is an enlarged sectional view showing the film path means.
  • the stops 25 are secured to the film path means by screws 29 and consist of webs which extend transversely'to the longitudinal direction of the film. As is apparent from FIG. 4, these webs protrude laterally from the film path means.
  • the filrnpressure plate28 is cushioned by a coil spring 30.
  • a film path member 36 is carried by Belleville springs path member compensates any tolerances which are inevitably involved in machining.
  • the stops 25 bear on the pressure ledges 26 of the camera body under the pressure of the Belleville springs 37.
  • a camera body 44 has a hook-in opening 45, into which the detent nose 8 of the cassette 1 is inserted when the latter is to be attached.
  • the cassette is then swung about the hook-in opening 45 until the detent nose 10 enters the funnel-shaped entrance portion of the track 46 and snaps behind the detent hooks 47 at the end of the track (FIG. 11).
  • the track 46 comprises a track portion 48, which positively defines the location of the cassette 1 on thecamera body. To disengage the locking member 47, a lever 49 must be pivotally moved.
  • the film guide means comprising a film gate and a lateral film guide form part of the camera.
  • the quick-change cassette 1 carries the second part of the film guide means, including the pressure plate 28 of the film gate. Only adjacent to the film gate 27 is the film slightly urged against the film plane. Above and below the film gate, the film moves through a rigid channel, which provides a clearance. The sliding surfaces are wellaccessible and are well protected because they are somewhat recessed. I
  • the loading of the camera is simplified because the cassette opens diagonally and is provided with a hinged guided in its continued movement by the engagement of the second detentnose 10, provided on the opposite side, in a recess 46, 48 provided for thispurpose on the housing, until the cassette finally engages its abutment and the locking means snap in.
  • a motion picture camera having a film guide and a film gate region and a cassette which is externally and detachably mountable on the camera and has film path forming means
  • the improvement comprising stops provided on the film path forming means of the cassette, ledges provided on the camera and positioned laterally of the film guide on the camera, means for detachably mounting the cassette on the camera, said stops and ledges being independent of the mounting means and positioned so as to abut when the cassette is mounted on the camera and to form a rigid film channel above and below the film gate of the camera and between the camera body and the cassette, means for resiliently cushioning the film path forming means of the cassette, and pressure plate means mounted on the cassette for bearing on the film adjacent to the film gate of the camera.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)
  • Endoscopes (AREA)
US00236610A 1971-03-25 1972-03-21 Motion picture camera comprising an externally attached detachable cassette Expired - Lifetime US3833292A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712114485 DE2114485C3 (de) 1971-03-25 Filmkamera mit aufsetzbarer Schnellwechselkassette

Publications (1)

Publication Number Publication Date
US3833292A true US3833292A (en) 1974-09-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00236610A Expired - Lifetime US3833292A (en) 1971-03-25 1972-03-21 Motion picture camera comprising an externally attached detachable cassette

Country Status (4)

Country Link
US (1) US3833292A (it)
FR (1) FR2131583A5 (it)
GB (1) GB1341358A (it)
IT (1) IT950489B (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0357174A1 (en) * 1988-07-15 1990-03-07 Ronald C. Goodman Constant center of gravity film camera magazine
US6457827B1 (en) 1998-12-23 2002-10-01 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Film guide for a movie camera
US20100174915A1 (en) * 2007-05-30 2010-07-08 Milan Prokin Turnover controller

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1863066A (en) * 1929-09-09 1932-06-14 Owens Dev Corp Film magazine
US2132714A (en) * 1935-06-11 1938-10-11 Eastman Kodak Co Locating member for a film magazine with respect to motion picture apparatus
US2175538A (en) * 1930-08-26 1939-10-10 Camera Patents Corp Film-handling apparatus
US2183068A (en) * 1937-04-08 1939-12-12 Agfa Ansco Corp Motion picture camera
US2241265A (en) * 1939-11-04 1941-05-06 Eastman Kodak Co Photographic film magazine
US2277695A (en) * 1934-10-08 1942-03-31 Kinatome Patents Corp Magazine and film handling apparatus
US2339202A (en) * 1941-01-27 1944-01-11 Bell & Howell Co Photographic camera
US2351886A (en) * 1941-11-24 1944-06-20 Revere Camera Co Film actuating means
US2462083A (en) * 1944-05-18 1949-02-22 Foster Warren Dunham Film handling apparatus and magazine for use therewith
US2505231A (en) * 1945-01-08 1950-04-25 Coutant Andre Cinematographic camera having separable gate forming means
GB641249A (en) * 1946-06-27 1950-08-09 Andre Clement Coutant Improvements in magazines for cinematographic cameras

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1863066A (en) * 1929-09-09 1932-06-14 Owens Dev Corp Film magazine
US2175538A (en) * 1930-08-26 1939-10-10 Camera Patents Corp Film-handling apparatus
US2277695A (en) * 1934-10-08 1942-03-31 Kinatome Patents Corp Magazine and film handling apparatus
US2132714A (en) * 1935-06-11 1938-10-11 Eastman Kodak Co Locating member for a film magazine with respect to motion picture apparatus
US2183068A (en) * 1937-04-08 1939-12-12 Agfa Ansco Corp Motion picture camera
US2241265A (en) * 1939-11-04 1941-05-06 Eastman Kodak Co Photographic film magazine
US2339202A (en) * 1941-01-27 1944-01-11 Bell & Howell Co Photographic camera
US2351886A (en) * 1941-11-24 1944-06-20 Revere Camera Co Film actuating means
US2462083A (en) * 1944-05-18 1949-02-22 Foster Warren Dunham Film handling apparatus and magazine for use therewith
US2505231A (en) * 1945-01-08 1950-04-25 Coutant Andre Cinematographic camera having separable gate forming means
GB641249A (en) * 1946-06-27 1950-08-09 Andre Clement Coutant Improvements in magazines for cinematographic cameras

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0357174A1 (en) * 1988-07-15 1990-03-07 Ronald C. Goodman Constant center of gravity film camera magazine
US6457827B1 (en) 1998-12-23 2002-10-01 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Film guide for a movie camera
US20100174915A1 (en) * 2007-05-30 2010-07-08 Milan Prokin Turnover controller

Also Published As

Publication number Publication date
GB1341358A (en) 1973-12-19
DE2114485B2 (de) 1976-05-06
DE2114485A1 (de) 1972-10-12
FR2131583A5 (it) 1972-11-10
IT950489B (it) 1973-06-20

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