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11 条记录 (耗时 0.012 秒)

    Motion picture shutter method and apparatus
    2.
    发明授权
    Motion picture shutter method and apparatus 失效
    电影快门方法和装置

    公开(公告)号：US4592632A

    公开(公告)日：1986-06-03

    申请号：US687027

    申请日：1984-12-28

    申请人： Walter Renold

    发明人： Walter Renold

    IPC分类号： G03B9/16 ,  G03B9/10

    CPC分类号： G03B9/16

    摘要： For a given shutter size, the effective illumination or light transmission period is increased by one half that of the angles subtended by the aperture. This increase is accomplished by providing, in addition to a first shutter having an opaque section in the case of a camera of at least 180.degree., a second shutter having an opaque section of an angle equal to that subtended by the aperture. The second shutter is coaxially mounted with the first shutter and caused to rotate at twice the speed of the first shutter. By initially aligning the leading edges of the shutters with the start of the aperture, the aperture is effectively covered and uncovered in half the time which would normally be required by using a single shutter providing the same film transport period alone. As a consequence, the period of illumination is increased by the referred to one-half of the angle subtended by the aperture. This value becomes significant if the shutter diameter is small relative to the aperture size since the subtended angle becomes larger.

    摘要翻译： 对于给定的快门尺寸，有效照明或光透射周期增加了由孔径对准的角度的一半。 这种增加是通过提供除了具有至少180度的照相机的情况下具有不透明部分的第一快门以外具有与孔径相对的角度相等的不透明部分的第二快门来实现的。 第二挡板与第一挡板同轴地安装并且以第一挡板的两倍的速度旋转。 通过首先将百叶窗的前缘与孔的起始对准，在通常使用提供相同膜输送周期的单个快门通常需要的时间的一半时间内，孔被有效地覆盖和覆盖。 因此，照明的周期被提到由光圈对着的角度的一半。 如果挡板直径相对于孔径尺寸较小，则该值变得显着，因为对角度变大。

    Motion picture film gate and registration system
    3.
    发明授权
    Motion picture film gate and registration system 失效
    电影胶片门和注册系统

    公开(公告)号：US4522476A

    公开(公告)日：1985-06-11

    申请号：US624462

    申请日：1984-06-25

    申请人： Walter Renold

    发明人： Walter Renold

    IPC分类号： G03B1/48

    CPC分类号： G03B1/48

    摘要： The film gate and registration system is used for motion picture film that is intermittently transported through a gate from one frame to the next. The arrangement is applicable to both motion picture cameras and projectors. A gate is provided with an aperture having solid marginal edge areas. Spaced pressure pads are arranged to be moved into and out of engagement with a film passing through the film gate. The pads press against the marginal edges of the film when the frame is in its dwell period in the gate either for exposure or projection. When the film is to be transported to the next frame, the pressure pads are withdrawn from the marginal edges and the film is lifted away from the aperture plane. In the preferred embodiment, registration indexing pins closely cooperate with the pressure pads in a special fashion to provide unusually precise positioning of each successive film frame at the end of the transport time.

    摘要翻译： 电影门和注册系统用于通过门从一帧间隔地传输到下一个帧的电影胶片。 该装置适用于电影摄像机和投影机。 门设置有具有实心边缘区域的孔。 间隔的压力垫布置成移动进入和离开通过薄膜门的薄膜的接合。 当框架处于门的停留时间段时，垫片抵靠着胶片的边缘，以便曝光或投影。 当胶片被运送到下一个框架时，压力垫从边缘边缘退出，并将胶片从孔平面提起。 在优选实施例中，注册分度销以特殊方式与压力垫紧密配合，以在运输时间结束时提供每个连续胶片框架的非常精确的定位。

    Free floating pressure roller means and retracting mechanism for film drive
    5.
    发明授权
    Free floating pressure roller means and retracting mechanism for film drive 失效
    免费浮动滚筒装置和回缩机构

    公开(公告)号：US3669331A

    公开(公告)日：1972-06-13

    申请号：US3669331D

    申请日：1971-03-04

    申请人： WALTER RENOLD

    发明人： RENOLD WALTER

    IPC分类号： G03B1/32 ,  G03B21/11 ,  G03D13/00 ,  G11B15/29

    CPC分类号： G03B1/32 ,  G03B21/113 ,  G03D13/003

    摘要： Slippage of a wide film engaged by a driving capstan is prevented by resiliently urging a pair of rollers mounted in a free floating yoke structure against the drive capstan. The yoke structure is guided by a frame means which also includes cam means for effecting the urging of the yoke structure. A lever element terminating in a hook is arranged to engage a bearing on the free end of the capstan to stabilize the same when the pressure rollers are in engagement with the capstan.

    摘要翻译： 通过将安装在自由浮动轭结构中的一对辊弹性推动抵靠驱动绞盘来防止由驱动绞盘接合的宽膜的滑动。 轭结构由框架装置引导，框架装置还包括用于实现轭结构的推动的凸轮装置。 终止于钩的杠杆元件设置成与主导轴的自由端上的轴承啮合，以在压力辊与绞盘相接合时使其稳定。

    Apparatus for intermittently moving film
    8.
    发明授权
    Apparatus for intermittently moving film 失效
    用于间歇移动胶片的设备

    公开(公告)号：US3613978A

    公开(公告)日：1971-10-19

    申请号：US3613978D

    申请日：1969-10-07

    申请人： WALTER RENOLD

    发明人： RENOLD WALTER

    IPC分类号： G03B1/34 ,  G03B39/04 ,  G03B1/24

    CPC分类号： G03B39/04 ,  G03B1/34

    摘要： An apparatus for intermittently moving film through a film gate for purposes of either exposure or projection particularly suitable for high-speed motion picture cameras, utilizes first and second roller arrangements on either side of the film gate in place of the conventional film loops. These rollers are caused to oscillate sinusoidally in such a manner as to increase the path length of film moving into the film gate and simultaneously decrease the path length of film leaving the film gate and thence reverse this motion to decrease the path length of film fed into the film gate and simultaneously increase the path length film leaving the film gate. With this arrangement the film may be payed out and taken up at constant speed while intermittent movement of film in the gate takes place and further the film is always captured. By properly adjusting the oscillation speed of the rollers relative to the payout and takeup constant speed, a portion of the film in the gate is stationary during a period when the path length of film into the film gate is increasing and the path length of film from the film gate is decreasing, and moving at a speed substantially twice the constant payout and takeup speed during another period when the path length of film into the film gate is decreasing and the path length of film from the film gate is increasing. Pulldown claw arrangements are thus eliminated as well as free-type storage loops heretofore used and the instability problems associated with such loops when the camera or projector is operating at high speed.

    Film transport assembly
    9.
    发明授权
    Film transport assembly 失效
    电影传输装配

    公开(公告)号：US4778093A

    公开(公告)日：1988-10-18

    申请号：US037427

    申请日：1987-04-13

    申请人： Walter Renold

    发明人： Walter Renold

    IPC分类号： B65H20/22 ,  B65H23/26 ,  G03B1/18 ,  G03B1/24 ,  B65H20/24

    CPC分类号： G03B1/24 ,  B65H20/22 ,  B65H23/26 ,  G03B1/18

    摘要： An improved film transport assembly is provided for intermittently advancing film, without pulldown claws or similar mechanisms for engaging film perforations to obtain intermittent transport, with extended dwell period past the film gate of a camera or projector, particularly such as a motion picture camera or projector adapted for high speed film transport or for handling relatively large film formats. The transport assembly includes film supply and takeup sprockets for constant velocity film transport respectively to and from the film gate, with the film passing over a primary roller and a compensation roller interposed between each sprocket and the film gate. The pairs of primary rollers and compensation rollers are displaced generally sinusoidally and at different cyclic rates to increase the film path length between the supply sprocket and gate while decreasing the film path length between the takeup sprocket and gate, and vice versa, resulting in a net film velocity of zero at the gate for a dwell period of up to 180 degrees, followed by generally sinusoidal transport of the film through a transport period of about 180 degrees to register the next film frame with the gate. Limited phase shift between the cyclic motions of the primary and compensation rollers will permit use of relatively simple sinusoidal displacement functions for improved balancing without film binding. Mechanisms are also disclosed for adjusting film position, film tension, and for accommodating films of different perforation pitch.

    摘要翻译： 提供了一种改进的胶片传送组件，用于间歇地前进胶片，没有下拉爪或用于接合胶片穿孔以获得间歇传送的相似机构，延长的停留时间经过照相机或投影仪的胶片门，特别是例如电影照相机或投影仪 适用于高速胶片传输或用于处理相对较大的胶片格式。 运输组件包括胶片供应和卷取链轮，用于分别到达胶片门和离开胶片门的恒速胶片传送，胶片通过一个主辊和一个位于每个链轮和胶片门之间的补偿辊。 一对初级辊和补偿辊一般呈正弦偏移且以不同的循环速率位移，以增加供给链轮和闸门之间的膜路径长度，同时减小卷绕链轮和闸门之间的膜路径长度，反之亦然，从而形成网 在栅极处的膜速度为零，停留时间高达180度，随后通过大约正弦输送约180度的输送周期的膜，以便与栅极配准下一个胶片框架。 初级和补偿辊的循环运动之间的有限相移将允许使用相对简单的正弦位移函数来改善平衡而不进行膜结合。 还公开了用于调节膜位置，膜张力和用于容纳不同穿孔间距的膜的机构。