公开(公告)号：US3753613A

公开(公告)日：1973-08-21

申请号：US3753613D

申请日：1972-02-24

Applicant: BOSCH GMBH ROBERT

Inventor： SCHIRMER W ,  REINSCH H ,  KUHNE G

IPC: G03B9/10 ,  G03B21/32 ,  G03B17/46

CPC classification number: G03B9/10 ,  G03B21/32

Abstract: A motion picture camera wherein a rotary shutter is movable between first and second angular positions in which its blade respectively overlies and is out of register with the lightadmitting aperture. An adjustable first pulse generator is provided to effect movements of the shutter from the first to the second position at preselected intervals to thereby start exposure with long exposure times. A second pulse generator is activated when the shutter assumes its second position and effects a movement of the shutter back to the first position with a delay which is a function of scene brightness but is invariably shorter than a preselected interval. The two pulse generators control a two-way switch which can cause an electromagnet to disengage an intercepting lever from the shutter whereby the lever starts the motor which rotates the shutter from the first to the second position when the switch is actuated by the first pulse generator and from the second to the first position when the switch is actuated by the second pulse generator.

Abstract translation: 一种运动摄像机，其中旋转快门可在第一和第二角位置之间移动，其中叶片分别覆盖在其上并与入光孔不配对。 提供可调节的第一脉冲发生器以实现快门从预定间隔从第一位置到第二位置的移动，从而以长曝光时间开始曝光。 当快门处于其第二位置时，第二脉冲发生器被激活，并且利用作为场景亮度的函数的延迟来实现快门回到第一位置的移动，但总是比预选间隔短。 两个脉冲发生器控制双向开关，其可以使电磁体从挡板上解除拦截杆，由此当开关由第一脉冲发生器致动时，杠杆启动使快门从第一位置旋转到第二位置的电动机 并且当第二脉冲发生器启动开关时从第二位置到第一位置。