Spaced Picture Gate And Sound Transducers Patents (Class 352/29)
  • Patent number: 11889813
    Abstract: A cassette (130) configured to enable measurement of at least one biomarker value of a milk sample of an animal (100). The cassette (130) includes a tape distributing spool (131); a tape (170) with a plurality of dry sticks (180a, 180b, 180c), configured to indicate the biomarker value of the milk sample, and a top film (310) arranged to protect the dry sticks (180a, 180b, 180c) while rolled up on the tape distributing spool (131); a tape collecting spool (132), configured to collect used dry sticks (180a, 180b, 180c); and a top film reel (330), arranged to peel off and collect the top film (310) of the tape (170).
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: February 6, 2024
    Assignee: DeLaval Holding AB
    Inventors: Claus Dallerup Rasmussen, Thomas Nikolai Carlsen
  • Patent number: 6038010
    Abstract: A digital sound signal reproducing device 10 includes a reduced number of guide rolls and so forth by changing the mounting position of a sound drum 13. The digital sound signal reproducing device 10 is made up of a guide sprocket 11, a guide roll 14 and a sound drum 13, about which runs an image film 1. The sound drum 13 carries a optical readout device 20 for reading out and reproducing digital sound signals recorded on a digital sound signal recording portion 5 of the image film 1. The guide sprocket 11 is arranged in the vicinity of an image film supply port 10A supplied with the image film 1. The guide roll 14 is arranged in the vicinity of an image film output port 10B from which the image film 1 is led out. The guide sprocket 11 includes an image film running adjustment device 30 adapted for applying a running load on the image film 1 supplied to the optical readout device 20.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: March 14, 2000
    Assignee: Sony Cinema Products Corporation
    Inventor: Etsuro Saito
  • Patent number: 5546143
    Abstract: A device for recording a motion picture film and a device for projecting a motion picture film susceptible to generation of low noise due to film feed are provided. A motion picture film 10 is fed on the frame basis so that the film is fed as it is clamped between an idler 45 and a rotary drum 48 and so that the film feed is stopped as a voice coil 43 is driven for displacing the idler 45 away from the rotary drum 48. A recording unit 30 records a frame image of the motion picture film each time the film feed is halted. Recording may be made in this manner under the state of extremely low noise level due to film feed. Film feed is made in a similar manner during projection of each frame image, and each frame image is also projected by a projection unit 70 each time the film feed is halted. Projection may also be made in this manner under the state of extremely low noise level due to film feed.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: August 13, 1996
    Assignee: Sony Corporation
    Inventors: Takashi Nakatsuyama, Takahiko Saito
  • Patent number: 4305645
    Abstract: In a motion picture camera capable of using a sound film, a blocking device for selectively stopping operation of a shutter and a shifting device for moving a pinch roller to or out of resilient contact with a capstan are controlled by a common electromagnetic device operating in response to actuation of a trigger device.
    Type: Grant
    Filed: January 11, 1980
    Date of Patent: December 15, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hidekazu Okajima
  • Patent number: 4274718
    Abstract: In a sound motion picture camera which permits both sound filming and silent filming by selective use of a sound film cartridge and a silent film cartridge, utilization is made of only signals from loop detecting means for detecting variations in the length of a loop of sound film formed between the exposure station and the sound recording station of the camera during the use of the sound film cartridge, whereby during the use of the silent film cartridge, the film transport speed of a first film transport means for effecting film transport at the exposure station is automatically set to a first speed suited for use of the silent film cartridge and during the use of the sound film cartridge, the film transport speed of the first film transport means is changed over between a second speed higher than the film transport speed of a second film transport means for effecting film transport at the sound recording station and a third speed lower than the film transport speed of the second film transport means in acc
    Type: Grant
    Filed: October 30, 1979
    Date of Patent: June 23, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Kohtani, Yoshio Komine
  • Patent number: 4218117
    Abstract: A vibration isolating mounting arrangement for a sound accessory for a motion picture viewer is provided. The mounting arrangement includes an accessory mounting plate which precisely engages a portion of the viewer for locating the plate with respect to a film cassette receiving well in the top of the viewer. An audio component arrangement is provided which includes an audio transducer and means for advancing the audio tape past the transducer. These audio components are mounted to an audio component plate which is supported in overlying relationship with respect to the accessory mounting plate and the audio components carried thereby. The mounting between the two parallel plates is designed to effect vibration isolation between the plates, thus isolating the audio components carried by the upper plate from vibrations present in the viewer during its operational modes.
    Type: Grant
    Filed: April 24, 1979
    Date of Patent: August 19, 1980
    Assignee: Polaroid Corporation
    Inventor: Richard V. Fischer
  • Patent number: 4198133
    Abstract: A cine camera for taking talking pictures comprises a film-feeding mechanism which includes a driven capstan and a pinch roller normally spaced therefrom to facilitate insertion of a section of film therebetween when the camera casing is loaded with a sound-film cassette. A sensor, upon detecting the presence of such cassette in a receiving chamber of the casing, causes the pinch roller to move closer to the capstan, either via a mechanical linkage or by deactivating a detent normally blocking a displacement of the pinch roller under spring pressure. This displacement under the control of the sensor may establish a standby position, with the pinch roller still separated from the capstan by a clearance wider than the film thickness, that clearance being subsequently reduced by the operation of a trigger, a mode-selector switch or the like to clamp the film between pinch roller and capstan.
    Type: Grant
    Filed: November 18, 1977
    Date of Patent: April 15, 1980
    Assignees: Karl Vockenhuber, Raimund Hauser
    Inventors: Otto Freudenschuss, Otto Kantner, Peter Revy von Belvard
  • Patent number: 4196983
    Abstract: A sound motion picture camera capable of using a sound film is disclosed. The camera includes a film receiving chamber having an image recording location and a sound recording location, a first film feeding device for intermittently transporting a film loaded in the chamber from the image recording location toward the sound recording location, a second film feeding device for transporting the film transported by the first film feeding means further downstream from the sound recording location at a substantially constant speed, a switching device interposed between the first and second film feeding devices and a control device for controlling the operation of the film feeding devices.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: April 8, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Takimoto, Hidekazu Okajima
  • Patent number: 4170407
    Abstract: A multipurpose audio/visual film cassette including supply and takeup spools in which opposite ends of a film strip are coupled for alternate winding and unwinding during passage through a first path for film exposing, processing and projecting operations with an audio tape also coupled at least on one end with the supply spool and interwound with the film strip to pass through a separate path, and a separating web is coupled at least on one end to the supply spool and preferably extending directly to the takeup spool in a third path. The separating web is arranged to overlie the side of the film strip on which processing fluid is deposited so as to be wound in convolutions between such side and the sound tape in order to prevent adherence of the sound tape to the film strip as a result of being interwound therewith before the processing fluid has dried.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: October 9, 1979
    Assignee: Polaroid Corporation
    Inventor: Joseph A. Stella
  • Patent number: 4165926
    Abstract: A trigger device for a sound motion picture camera actuates a capstan drive mechanism of the camera at an initial stage of advancing movement of a reciprocatable trigger member and claw and shutter drive mechanism of the camera simultaneously with resilient contact of a pinch roller holder with a capstan at a final stage of the advancing movement of the trigger member. A locking member releasably locking a pinch roller holder at its retracted position wherein the pinch roller is separated from the capstan, is disposed in the path of the advancing movement of the trigger member at a position wherein it is disabled by the trigger member at the final stage of the advancing movement of the trigger member.
    Type: Grant
    Filed: January 5, 1978
    Date of Patent: August 28, 1979
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventor: Hiroyuki Tsumazawa
  • Patent number: 4157865
    Abstract: A sound cine camera with a cassette-receiving compartment, in which a pinch roller is movable toward a continuously rotating capstan to drive a motion-picture film, is provided with a manually operable control member whose displacement into an off-normal position, against the force of a restoring spring, prepared or completes an energizing circuit for the film drive. The control member is linked with a pinch-roller support through a releasable coupling which remains effective only as long as the compartment cover or a latch thereof is in a closure position. Clamping pressure is exerted upon the pinch roller by a biasing spring engaging its support and acting upon the control member through a camming or toggle mechanism which reduces the holding force required to maintain that pressure when the control member is in its off-normal position.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: June 12, 1979
    Assignees: Karl Vockenhuber, Raimund Hauser
    Inventors: Otto Kantner, Peter R. VON Belvard
  • Patent number: 4150881
    Abstract: In a sound recording portion of a sound motion picture camera, a film strip is continuously advanced by a capstan and a pinch roller. The pinch roller is movable between its retracted position where it is spaced apart from the capstan and its operative position where it is pressed against the capstan to pinch the film strip therebetween. The pinch roller is supported on a pivotable member which is capable of pivoting from a first position in which it holds the pinch roller in the retracted position to a second position in which it holds the pinch roller in the operative position. The pivotable member is moved between the two positions driven by a reciprocating plate member which is moved back and forth in translational movement by an electric motor through a cam mechanism. The electric motor is energized in response to depression of the shutter button of the camera and deenergized when the pivotable member is pivoted to its second position.
    Type: Grant
    Filed: July 5, 1978
    Date of Patent: April 24, 1979
    Assignee: Fuji Photo Optical Co., Ltd.
    Inventor: Takashi Tobioka
  • Patent number: 4148570
    Abstract: In a sound motion picture camera of the type adapted for selective use of a sound magazine and a silent magazine and having separate drives for intermittent advancement and constant-speed transport of the film respectively on an exposure station and a sound recording station, the speed of rotation of a motor for the intermittent film drive is adjusted in accordance with the preselected value of picture frame speed when the used magazine is of the silent type, and varied as taking either of two discrete values faster and slower than the normal picture frame speed, depending upon whether a slack loop of the film formed between the exposure station and the sound recording station is decreased or increased from the predetermined length thereof, when the used magazine is of the sound type.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: April 10, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshikazu Ichiyanagi
  • Patent number: 4129363
    Abstract: The present invention relates to a sound motion picture camera capable of the sound recording on the film at the same time with the film exposure by using a sound film cartridge containing a sound film and having an opening for enabling sound recording on the film by means of sound recording device, whereby the sound motion picture camera is provided with a preventive means for preventing the film cartridge from being improperly taken out of the cartridge loading chamber of the camera in the state in which the sound recording device is operatively engaged with the film in the opening of the film cartridge for recording the sound on the film.
    Type: Grant
    Filed: April 22, 1977
    Date of Patent: December 12, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshio Komine
  • Patent number: 4088399
    Abstract: In a dual film-gauge telecine apparatus two optical sound heads are provided in close proximity to the drive capstan. The drive capstan is provided with an annular groove to support one of the optical sound heads. The sound heads comprise a light source and light sensitive detector so disposed as to be in alignment on opposite sides of the edge of a film of the respective gauge.
    Type: Grant
    Filed: May 13, 1976
    Date of Patent: May 9, 1978
    Assignee: The Rank Organisation Limited
    Inventors: John D. Millward, Brian Wilsher, Ronald Mumford
  • Patent number: 4084892
    Abstract: A control for varying the speed of advancement of film is described for use in a film projector in which the film is advanced by a shuttle tooth which engages perforations in the film and advances the film along a path between a light source and a projector aperture. The control includes a rotary shutter assembly having one or more shutter blades for interrupting the light from the light source. As the shutter assembly rotates, the shuttle tooth is reciprocated in the direction of film feed by a rotary cam having one or more cam lobes mechanically coupled to the shuttle tooth. The rotation of the cam lobes is synchronized to the rotation of the shutter blades such that the shuttle tooth is positioned for engagement with the perforations associated with the next successive film frame to be projected whenever a shutter blade interrupts the light source.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: April 18, 1978
    Assignee: Bell & Howell Company
    Inventors: John P. Bagby, Erwin E. Figge, Raymond W. H. Kim
  • Patent number: 4076396
    Abstract: A motion picture camera is adapted to receive a film magazine containing a roll of sound recordable photographic film. A housing forms a chamber to receive the magazine. A cover opens and closes the chamber. A recording system records sound signals on the film. A setting arrangement engages the recorder system and the film with each other so as to record signals. The setting arrangement is movable into a first position where the film engages the recorder and a second position where the film is disengaged from the recorder so as to be incapable of recording sound signals. A transport device is coupled to the setting arrangement in the first position when the recorder is in the first position. And an interconnecting system responds to closure of the cover for moving the setting arrangement from the second position to the first position so that the camera can be set for sound signal recording in response to the closing of the cover.
    Type: Grant
    Filed: April 8, 1974
    Date of Patent: February 28, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshio Komine, Hiroshi Furukawa, Kiyoshi Takahashi, Tomoshi Takigawa, Mitsutoshi Ogiso, Toshikazu Ichiyanagi
  • Patent number: 4052125
    Abstract: A motion picture camera for simultaneous recording of picture and sound is provided with a starting and stopping device for controlling film transport mechanisms and displacing same into and out of operative orientation with the film as the camera is actuated and deactuated wherein the size of the film loop is maintained substantially constant before or after and during camera operation.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: October 4, 1977
    Assignee: Nihon Beru-Haueru Kabushiki Kaisha
    Inventor: Takao Ishibashi
  • Patent number: 4037948
    Abstract: A photographic camera in which a film cartridge, housing a photographing film having a recording belt capable of recording sound signal, can be loaded, wherein for the purpose of effecting the recording of sound signal simultaneously with photographing a sound signal recording head and a constant speed film running mechanism are provided at the sound signal recording part being separated from an intermittent film transport mechanism for running the above mentioned film with a constant speed.
    Type: Grant
    Filed: April 16, 1974
    Date of Patent: July 26, 1977
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiichi Sakaguchi, Yoshio Komine, Toshikazu Ichiyanagi, Mamoru Shimazaki, Kazuya Hosoe
  • Patent number: 4030818
    Abstract: A motion picture sound camera wherein a chamber in the camera housing can receive relatively small containers for regular motion picture film or relatively large containers for sound film. When the chamber receives a large container, the latter deforms a leaf spring which is thereby disengaged from a lever serving to move a component of the sound recording mechanism into engagement with an accessible portion of sound film in the inserted container. The lever can be moved in the opposite direction by a knob which is accessible from without the housing and is turnable by hand between a first and a second position. When moved from the first to the second position, the knob moves the lever and the component to a retracted position while simultaneously stressing a resilient ejector for containers in the chamber, unlocking the door for the chamber and resetting a film frame counter to starting position.
    Type: Grant
    Filed: May 8, 1975
    Date of Patent: June 21, 1977
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Wolfgang Geisslinger, Peter Ungnadner
  • Patent number: 4025174
    Abstract: The invention discloses a cinecamera capable of synchronous recording wherein a swingable arm carrying a pinch roller at one end thereof is operatively coupled to a shutter release locking lever in such a manner that when the lever is placed in the shutter release locking position for preventing shooting, the pinch roller may be moved away from a capstan by a sufficient distance to permit the smooth loading and unloading of a film cartridge, but when the lever is switched to the release position for permitting the shooting the arm may be swung to displace the pinch roller to a position very closely spaced from the capstan. The construction of the cinecamera may be remarkably simplified as compared with the conventional cinecameras wherein the pinch roller arm is operatively coupled to the cover or lid of the camera.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: May 24, 1977
    Assignee: Sankyo Kogaku Kogyo Kabushiki-Kaisha
    Inventors: Katsuhide Takagi, Toshiro Fukasawa
  • Patent number: 4018517
    Abstract: A motion picture camera for use with regular motion picture film or with motion picture film having a sound track and being stored in containers larger than those for the storage of regular film so that, when the chamber in the body of the camera received a small container, such small container leaves unoccupied a portion of the chamber which is occupied when the chamber receives a large container. A properly inserted large container deforms a leaf spring which extends into the aforementioned portion of the chamber whereby the thus deformed leaf spring enables a first lever to permit the pivoting of a second lever under the action of a torsion spring. The second lever moves a roller into engagement with film in a properly inserted large container opposite a rotary element which is adjacent to a sound head of the sound recording mechanism in the camera body.
    Type: Grant
    Filed: May 8, 1975
    Date of Patent: April 19, 1977
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Peter Ungnadner, Wolfgang Geisslinger
  • Patent number: 4005931
    Abstract: A film projector system including a sealed film cassette removably mounted ithin an aperture in the projector and driving means in said projector mechanically engaging coupling means extending through said cassette for driving the sealed film between hubs sealed in said cassette intermittently past a film projection location gate in said cassette and continuously past a sound detection location therein, with the projection plane of the film at said projector locations being disposed normal to the projector optical projection optical sound beams and twisted ninety degrees with respect to the plane of that portion of the film wound on said hubs so that the projector beams do not pass between the film hubs.
    Type: Grant
    Filed: January 15, 1974
    Date of Patent: February 1, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Seth Leroy Everett, Jr.
  • Patent number: 3999843
    Abstract: In a continuous film cartridge sound motion picture projector employing a closed loop film which is twisted to cause it to turn over with each passage through the projector, optical sound tracks on the emulsion side of the film are used to modulate a narrow beam of light, and this beam is prefocused on the center of the film while it is pressed against a film positioning element carried by the projector and the modulated beam of light is picked up by a photosensitive element which is carried by the projector and moved into the cartridge upon insertion thereof. This system is made practical by employing a beam of light which has a thickness of from 0.3 - 0.6 mil and which is produced using a single cylindrical lens element to provide a beam having a cone angle which is not more than 25.degree. to provide an adequate depth of focus to accommodate the alternate presentation of the opposite faces of the film when the film is turned over.
    Type: Grant
    Filed: February 11, 1974
    Date of Patent: December 28, 1976
    Assignee: Audio-Optic Corporation
    Inventor: Peter J. Castellano
  • Patent number: 3986770
    Abstract: A movie camera of the kind adapted for simultaneous motion picture and magnetic sound recording on a film in a cartridge, in which sound recording means including a magnetic recording head and a capstan are disposed in the camera body, and a swingable lever carrying sound recording means including a pinch roller is disposed in the camera body to be held in a retracted position when the cover of the camera is fully opened and kept in such position for the loading and unloading of the cartridge. In the movie camera, means are provided so that the pinch roller carried by the swingable lever can be urged to a position closely adjacent to the capstan and held temporarily in such position when the cartridge is loaded and the cover is closed, and then the pinch roller can be urged further toward the capstan to bring the sound recording track portion of the film into pressure contact with the capstan in response to the manipulation of the release for starting the motion picture taking operation.
    Type: Grant
    Filed: April 25, 1975
    Date of Patent: October 19, 1976
    Assignee: Sankyo Kogaku Kogyo Kabushiki-Kaisha
    Inventors: Katsuhide Takagi, Toshiro Fukasawa
  • Patent number: 3984179
    Abstract: A movie sound camera wherein the motor for the sound shaft of the sound recording unit is started by a self-arresting rotary programming device prior to completion of the circuit of a sound amplifier, and the circuit of the amplifier is completed prior to starting of the motor for the pull down in response to movement of camera release from the idle position. When the release is returned to the idle position, the programming device automatically arrests the motor for the pull-down prior and the motor for the sound shaft subsequent to opening of the amplifier circuit. The programming device further controls the sequence in which the film is pressed against the sound shaft and biased against the second recording head of the recording unit in response to movement of release from the idle position. The programming device forms part of a control unit and is rotated by a motor which is started in response to movement of release to or from the idle position.
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: October 5, 1976
    Assignee: Robert Bosch G.m.b.H.
    Inventor: Fritz Krumbein
  • Patent number: 3970378
    Abstract: A movie camera capable of magnetic recording on a loaded film simultaneously with filming includes a pinch roller carried by a bracket which is swingable relatively to the camera body. The pinch roller is movable relatively to the bracket. The bracket is movable in response to the closing operation of a lateral cover of the camera to a position where the pinch roller is adjacent to a capstan and restrained immovably in the position. In response to the operation of a release element for initiating recording, the pinch roller is moved by a spring member into rolling engagement with the film to urge the same into contact with the capstan for recording on the film along a recording track.
    Type: Grant
    Filed: April 25, 1975
    Date of Patent: July 20, 1976
    Assignee: Sankyo Kogaku Kogyo Kabushiki-Kaisha
    Inventors: Katsuhide Takagi, Toshiro Fukasawa
  • Patent number: 3967886
    Abstract: The present invention relates to a motion picture camera which includes an openable cover for loading a film magazine containing a film capable of recording sound information. A sound recording device for recording the sound information on the film and a movable device for moving either the sound recording device or the film to a position at which the sound can be recorded is also included. An operation device for operating the opening and the closing of the openable cover can be displaced to three positions, i.e. the first, the second and the third position. The operation is carried out stepwise so that, at the first position, the movable device operates while the openable cover is locked; at the second position, the movable device does not operate while the openable cover is locked; and at the third position, the movable device does not operate while the openable cover is freed. At least one of the three position being non-linear with respect to the other two.
    Type: Grant
    Filed: October 2, 1974
    Date of Patent: July 6, 1976
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshio Komine, Kazuya Hosoe, Mamoru Shimazaki, Toshikazu Ichiyanagi, Kiyoshi Takahashi
  • Patent number: 3963331
    Abstract: The present invention relates to a camera capable of simultaneous film and sound recording and into which film magazine housing a film with a sound recording belt can be loaded. The camera has a sound recording device for recording sound on said sound recording belt of the film while photographing is made and also a driving device to continuously run the above mentioned film against said sound recording device. The camera can be shifted to the simultaneous sound recording state in response to the shutter release operation of the camera being in the preparation completion state for photographing with simultaneous sound recording.
    Type: Grant
    Filed: October 2, 1974
    Date of Patent: June 15, 1976
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshio Komine, Kazuya Hosoe, Mamoru Shimazaki, Toshikazu Ichiyanagi, Kiyoshi Takahashi
  • Patent number: 3958868
    Abstract: In a sound motion picture camera, a pinch roller actuating device for displacing the pinch roller into engagement with a constantly rotating capstan for transporting an elongated web such as sound film. The pinch roller contacting device includes a manually actuatable camera operating trigger member movable into and out of operative engagement with a control member provided with a neutral portion and an active portion which moves the pinch roller into engagement with the capstan. The neutral portion is provided to move the control member slightly, if at all, even if the trigger member is moved significantly after the pinch roller has contacted the capstan through displacement by the active portion.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: May 25, 1976
    Assignee: Nihon Beru-Haueru Kabushiki Kaisha
    Inventor: Yoshiaki Mizuki
  • Patent number: 3942882
    Abstract: Disclosed is a film speed control device for a single-system sound camera capable of simultaneous picture/sound recording in which an intermittent film transport mechanism at the exposure station and a constant speed film transport mechanism at a sound station having a magnetic recording head are driven synchronously by separate drive motors. In the control device, the impedance of a high frequency coil is changed in response to changes in the size of a film loop between the stations to control the rate of operation of the intermittent film transport so as to maintain constant the size of the film loop. The output of the high frequency oscillator is used for AC bias for the magnetic recording head, and is rectified for use as a power source for the recording amplifier.
    Type: Grant
    Filed: July 15, 1974
    Date of Patent: March 9, 1976
    Assignees: Bell & Howell Japan, Ltd., Nihon Beru-Haueru Kabushiki Kaisha
    Inventor: Fumio Saito
  • Patent number: 3936166
    Abstract: A sound motion-picture system employing a film handling cassette within which the film is retained throughout all photographic and audio operations. The film handling cassette includes both an audio station and an exposure-projection station, and the camera and viewer apparatus includes a pair of drive arrangements for progressively advancing incremental sections of such film across the exposure-projection station and for substantially uniformly advancing the film strip through the audio station. To isolate these different film motions, the drive arrangements cooperate with the cassette to provide a free loop of film extending exteriorly of the cassette. A sensing element monitors the loop of film and adjusts one of the drives so as to retain the loop within predetermined limits. In the camera, the audio drive is coupled to the start switch so as to displace the audio drive into a standby position when the camera is not being operated.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: February 3, 1976
    Assignee: Polaroid Corporation
    Inventor: Donald T. Scholz