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Title: Motion picture projector device as audio-visual aid and audio-visual system using the same
Claims: We claim as our invention: 1. An audio-visual system for reproducing a strip of cinematographic film provided with an image information zone, along which a first image information, for motion projection, and a second image information, for still projection, are recorded in succession, and along which there are provided a first sound signal zone corresponding to said first image information, a second sound signal zone corresponding to said second image information, a transfer instruction signal zone, and a mode change-over signal zone, said system comprising in combination: a. signal recording means having; 1. a sound signal recording medium and means for moving said recording medium continuously at a substantially constant speed; and 2. first transducing head means arranged to record a sound signal onto said sound signal recording medium, and of converting the thus recorded sound signal into an electrical signal; b. film feeding means capable of feeding said film in a motion projection mode, and of temporarily stopping the film feeding for a still projection mode; c. sound signal information reproducing means; and d. a control device having; 1. second transducing head means for detecting a first sound signal along said first sound signal zone of said film and for directing the thus detected sound signal into said sound signal information reproducing means; 2. third transducing head means for detecting in sequence during movement of said film, a transfer instruction signal in said transfer instruction signal zone, a second sound signal in said second sound signal zone, and a mode change-over signal in said mode change-over signal zone; and 3. control means electrically connected to said first and third transducing head means, and said film feeding means to control the operations of said transducing head means and said film feeding means, said control means being operative in response to said transfer instruction signal from said third transducing head means to cause the second sound signal and said mode changeover signal detected by said third transducing head means to be recorded onto said recording medium via said first transducing head means, said control means also being operative in response to the detection of said mode change-over signal by said third transducing head means to control said film feeding means to stop the film feeding for said still projection mode and for simultaneously causing the signal recorded on said recording medium to be detected by said first transducing head means and for the thus detected signal to be directed through said sound signal reproducing means, and said control means further being operative in response to the detection, by said first transducing head means, of said mode change-over signal recorded on said recording medium to return said film feeding means to its motion projection mode. 2. The audio-visual system as defined in claim 1, wherein said second transducing head means is provided with a magnetic head member which contacts a main track, along which said first sound signal is recorded. 3. The audio-visual system as defined in claim 1, wherein said film is mounted and disposed on a turn table accommodated in a film cartridge and arranged for continuous rotation at a substantially regular speed, and is formed in an endless loop coiled about the center of said turn table in such a manner that after each portion of said film is fed from the coiled region thereof to a projection position, it is again coiled about the central portion of the same turn table, and wherein said recording medium is fixedly secured to one rotating surface of said turn table. 4. The audio-visual system defined in claim 3, wherein said first transducing head means is provided with a magnetic head member and mounting means for said head operable to move said head member in the radial direction with respect to the center of rotation of said turn table, while maintaining said head member in contact with said recording medium. 5. The audio-visual system defined in claim 4, wherein said mounting means includes resetting means operable to return said head member to its initial starting point on said recording medium. 6. An audio-visual system for use with a strip of film having an image information zone, along which there is provided a first image information for motion projection and a second image information for still projection, and along which there are further provided, a first sound signal zone corresponding to said first image information, and a first mode changeover signal zone for said still projection mode, said system comprising in combination: a. an auxiliary sound signal accommodating device having: 1. a sound signal recording medium and means for moving said recording medium continuously at substantially constant speed, said sound signal recording medium being provided with a second sound signal zone, corresponding to said second image information, and a second mode change-over signal zone located substantially at the terminal end of said second sound signal zone, for instructing the motion projection mode; and 2. first transducing head means arranged to detect a second sound signal along the second signal zone of said signal recording medium and to convert the same into an electrical signal; b. film feeding means capable of feeding said film in a motion projection mode and of temporarily stopping the film feeding operation for a still projection mode; c. sound signal information reproducing means; d. a control device having: 1. second transducing head means for detecting signals along said signal zones of said film; and 2. control means electrically connected to said first and second transducing head means, and to said film feeding means, said control means being operative in response to the detection of a first mode change-over signal along the first mode change-over signal zone of said film by said second transducing head means to stop the film feeding for said still projection zone and at the same time to cause said first transducing head means to detect said signals on said signal recording medium and to direct the thus detected signals through said sound information recording means, and said control means also being operative in response to the detection of said second mode change-over signal on said recording medium by said first transducing head means to return said film feeding means to its motion projection mode; and e. first transducing head mounting means arranged to move said first transducing head means from an initial position to a second position on said recording medium during recording onto said recording medium, said mounting means including reset means responsive to each occurrence of said mode change-over signal to reset said first transducing head means to its said initial position. 7. The audio-visual system as defined in claim 6, wherein said first transducing head means is provided with a head member and mounting means operable to maintain said head memger in contact with said signal recording medium which is rotated at a substantially regular speed, said mounting means further being operable to continuously displace said head member in the radial direction with respect to the center of rotation of said recording medium. Other info: Inventors: Ashida, Akira (Tokyo, JA) Takahashi, Kiyoshi (Kunitachi, JA) Application Number: 476107 Filing Date: 1974-06-03 Publication_date: 1976-09-21 Assignee: Canon Kabushiki Kaisha (Tokyo, JA) Primary Class(es): 352/12 352/5, 352/27, 352/37, 352/169 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Hayes, Monroe H. Assistant Examiner: Attorney: Fitzpatrick, Cella, Harper & Scinto |
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