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    • 63. 发明授权
    • Sound motion picture projection system
    • 声音电影投影系统
    • US4179197A
    • 1979-12-18
    • US790762
    • 1977-04-25
    • Kuniyoshi SuzukiAkira AshidaTakashi ItaniTateo YamadaMasaya MaedaKiyoshi TakasashiHiroyuki Takimoto
    • Kuniyoshi SuzukiAkira AshidaTakashi ItaniTateo YamadaMasaya MaedaKiyoshi TakasashiHiroyuki Takimoto
    • G03B31/00G03B31/02
    • G03B31/02
    • A sound motion picture projection system which can be formed by a combination of a silent film projector and a sound recording and reproducing unit, wherein a silent film projector and a separate sound recording and reproducing unit are provided and minor modification is given to said silent film projector so that said silent film projector can be used as a projection unit only with said minor modification.And especially in this system when said sound unit is attached to said projection unit and continuous film advancing means provided at said sound unit is connected with a driving motor provided at said projection unit through a power transmission mechanism, and at a same time an intermittent film advancing means provided at a projection unit is connected with a part of said power transmission mechanism through a power transmission mechanism of variable speed type, further an output member of a loop sensing means provided at the sound unit is connected with said variable speed power transmission mechanism, so that an operating speed of the intermittent film advancing means at the projection unit is controlled depending on the change in an amount of film loop formed between a projection station of the projection unit and a sound recording and a reproducing station of the sound unit.
    • 一种声音电影投影系统,其可以由无声电影投影仪和声音记录和再现单元的组合形成,其中提供无声电影投影仪和单独的声音记录和再现单元,并且对所述无声电影进行了微小的修改 投影机,使得所述无声电影投影仪可以仅用于所述小的改进而用作投影单元。 特别是在该系统中,当所述声音单元安装到所述投影单元上时,设置在所述声音单元处的连续胶片推进装置通过动力传递机构与设置在所述投影单元上的驱动电机连接,同时间断膜 设置在投影单元处的前进装置通过变速型动力传递机构与所述动力传动机构的一部分连接,并且设置在声音单元处的环路检测装置的输出构件与所述变速动力传递机构 使得根据在投影单元的投影站和声音单元的声音记录和再现站之间形成的胶卷的量的变化来控制在投影单元处的间歇胶片推进装置的操作速度。