公开(公告)号：US3972604A

公开(公告)日：1976-08-03

申请号：US510557

申请日：1974-09-30

申请人： Hirofumi Yoshimura ,  Toyonori Higuma ,  Noriaki Itoo

发明人： Hirofumi Yoshimura ,  Toyonori Higuma ,  Noriaki Itoo

IPC分类号： G03B31/00 ,  G03B21/43 ,  G03B31/02

CPC分类号： G03B21/43 ,  G03B31/02

摘要： A motion-picture camera having exposure and sound-recording structures past which the film is transported by a pair of film-transporting structures, respectively, at least one of which is driven by a variable speed electric motor. The film is transported both forwardly and rearwardly and forms between the exposure and sound-recording structures a loop from which the film is continuously transported to the sound-recording structure and to which the film is transported in a stepwise manner from the exposure structure. A detecting device detects when this film loop becomes longer or shorter than a predetermined magnitude, and through a suitable circuit this detecting device is connected with the variable speed motor for controlling the speed thereof so as to increase the length of the film loop when it becomes shorter than the predetermined magnitude and decrease the length of the film loop when it becomes longer than the predetermined magnitude, so that in this way the film loop is maintained at the predetermined magnitude. The components referred to above operate both during forward as well as rearward travel of the film so that it is necessary to displace components of the sound-recording structure away from the film during rearward travel of the latter.

摘要翻译： 一种具有曝光和声音记录结构的运动图像摄像机，通过一个胶片传送结构传送胶片，其中至少一个由变速电动机驱动。 胶卷被向前和向后传送，并在曝光和声音记录结构之间形成一个循环，胶片从该环路连续传送到声音记录结构，并且胶片以曝光结构逐步的方式传送到胶片上。 检测装置检测该膜回路何时变得比预定大小更长或更短，并且通过合适的电路，该检测装置与变速马达连接，用于控制其速度，以便当其成为时增加胶片环的长度 比预定幅度短，并且当膜环长度超过预定幅度时减小胶片的长度，从而以这种方式将胶片环保持在预定的大小。 上述组件在薄膜的前进和向后行进期间都起作用，使得需要在后者的向后行进期间使声音记录结构的部件远离胶片。

公开(公告)号：US3950083A

公开(公告)日：1976-04-13

申请号：US515898

申请日：1974-10-18

申请人： Hirofumi Yoshimura ,  Toyonori Higuma ,  Noriaki Itoo

发明人： Hirofumi Yoshimura ,  Toyonori Higuma ,  Noriaki Itoo

IPC分类号： G03B31/00 ,  G03B19/26 ,  G03B31/02 ,  G03B21/36

CPC分类号： G03B31/02 ,  G03B19/26

摘要： A motion picture camera capable of recording sound simultaneously with film exposure and capable of carrying out fade-out as well as fade-in operations. A control is provided for automatically reducing the audio level during a fade-out operation and for automatically increasing the audio level during a fade-in operation.