Film counter
    1.
    发明授权
    Film counter 失效
    电影柜台

    公开(公告)号:US4021828A

    公开(公告)日:1977-05-03

    申请号:US546562

    申请日:1975-02-03

    IPC分类号: G03B17/36

    CPC分类号: G03B17/36

    摘要: An electrical film counter for a photographic camera is provided with a differentiating circuit responsive to a film winding operation for producing an output pulse. The number of output pulses from the differentiating circuit is counted by an UP-DOWN counter and is decoded by a decoder designed to drive an indicator which indicates the number of film frames advanced through the film gate of the camera.

    摘要翻译: 用于照相机的电影计数器具有响应于用于产生输出脉冲的胶片卷绕操作的微分电路。 来自微分电路的输出脉冲的数量由UP-DOWN计数器计数,并被解码器解码,设计成用于驱动指示器,该指示器指示通过相机的胶片门前进的胶片帧的数量。

    Control circuit for a memory type electric shutter
    7.
    发明授权
    Control circuit for a memory type electric shutter 失效
    记忆式电动快门控制电路

    公开(公告)号:US4170411A

    公开(公告)日:1979-10-09

    申请号:US751947

    申请日:1976-12-17

    CPC分类号: G03B7/083 G03B7/16 G05B6/02

    摘要: In the system disclosed, a feedback circuit connects the output of the last of a plurality of cascaded amplifier stages to the input of the first stage. A photoelectric transducer is connected to one of the stages. The feedback connection compresses the output signal relative to the signal at the photoelectric transducer, logarithmically. Preferably all the stages are linear and the feedback circuit is linear so that no logarithmic members are required. Preferably each of the stages is composed of an amplifier and a connection corresponding to an emitter-follower connection. A suitable system then utilizes the compression characteristic in a shutter control. This system may use a second compression circuit comparable to the first. Additional photographic information may be applied to the input of any of the stages in either compression circuit.

    摘要翻译: 在所公开的系统中,反馈电路将多个级联放大器级中的最后一级的输出连接到第一级的输入端。 光电传感器连接到其中一个级。 反馈连接相对于光电传感器的信号压缩输出信号,对数。 优选地,所有级是线性的并且反馈电路是线性的,使得不需要对数构件。 优选地,每个级由放大器和对应于射极跟随器连接的连接组成。 合适的系统然后利用快门控制中的压缩特性。 该系统可以使用与第一压缩电路相当的第二压缩电路。 附加的照相信息可以应用于压缩电路中的任何级的输入。

    Focal plane shutter for a camera
    10.
    发明授权
    Focal plane shutter for a camera 失效
    焦平面快门用于相机

    公开(公告)号:US4153360A

    公开(公告)日:1979-05-08

    申请号:US764287

    申请日:1977-01-31

    IPC分类号: G03B9/28 G03B1/06 G03B9/34

    CPC分类号: G03B1/06 G03B9/34

    摘要: A focal plane shutter for a camera includes a shutter unit casing for supporting a shutter mechanism. A rotatable body is connected with the shutter for winding up the shutter to a charged position. A shutter driving spring is also connected with the shutter mechanism for driving the shutter and a holding member is coupled with the rotatable body for holding the shutter mechanism in a charged position. A driving shaft carrying a driving gear is coupled to the rotatable body through a transmission gear and a clutch. A spring is coupled with the clutch to urge the clutch in a direction for releasing engagement between the transmission gear and the rotatable body. The driving gear has a plane section on its circumferential periphery spacing adjacent teeth apart so that engagement between the driving gear and the transmission gear is released when the rotatable body is held so that the transmission gear and the clutch can rotate, under the influence of the spring, back to the initial position.

    摘要翻译: 用于相机的焦平面快门包括用于支撑快门机构的快门单元壳体。 可旋转体与快门连接,用于将快门卷绕到充电位置。 快门驱动弹簧还与快门机构连接以驱动快门,并且保持构件与可旋转体联接,用于将快门机构保持在充电位置。 承载驱动齿轮的驱动轴通过传动齿轮和离合器联接到旋转体。 弹簧与离合器联接以沿着用于释放传动齿轮和可旋转体之间的接合的方向推动离合器。 驱动齿轮具有在其周向间隔相邻的间隔的平面部分,使得当可旋转体被保持时驱动齿轮和传动齿轮之间的接合被释放,使得传动齿轮和离合器可以在 春天,回到初始位置。