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    • 2. 发明专利
    • Improvements in or relating to talking and sound reproducing machines
    • GB1102802A
    • 1968-02-14
    • GB704364
    • 1964-02-20
    • PETER AUSTIN ISHERWOOD
    • G09B5/06
    • 1,102,802. Magnetic recording &c. apparatus. P. A. ISHERWOOD. 19 Feb., 1965 [20 Feb., 1964], No. 7.043/64. Heading G5R. Educational apparatus comprises blocks 3 provided with symbols, e.g. words, on one side and corresponding sounds recorded on a magnetic tape on the other side. The blocks are arranged in a desired order on a frame 2 of a playback apparatus and clamped by a cover 6. A playback head (not shown) mounted on a carriage supported on wheels from the frame 2 may be moved along the lower side of the blocks by means of a hand wheel 11. The head may scan two tracks on the tapes, the second track being used, for example, to record sounds e.g. when studying a language. A piece of foam is preferaby provided between each block and its length of tape to press the tape against the head, and this pressure may be assisted by suction applied to the head. Each block may be provided with slots into which a card bearing visual information and a card bearing a length of magnetic tape may be inserted, Fig. 5 (not shown). When not in use the blocks may be stored in a spring-loaded magazine arranged so that only the top block may be extracted, Fig. 4 (not shown).
    • 9. 发明授权
    • Brake point film metering
    • 制动点胶片计量
    • US5655169A
    • 1997-08-05
    • US456442
    • 1995-06-01
    • Peter Austin Newman
    • Peter Austin Newman
    • G03B1/60G03B17/42G03B1/00
    • G03B17/425G03B1/60
    • Film winding between exposures in a photographic camera is interrupted and/or braked as a function of film velocity. The camera uses velocity in a control mechanism that stops the winding motor as a function of the velocity in response to detection of a film perforation. The function acts on a time interval between sensing a perforation and stopping the motor or applying a brake. The perforation detector and the velocity sensor use a single sensing element that generates first and second signals at the respective leading and trailing edges of a perforation. The time interval between the first and second signals is indicative of film velocity, and is used to determine the stopping function preferably in accordance with a predetermined look-up table. The control then selects an appropriate time interval between sensing a respective one of the perforations and stopping said motor. A brake also may be applied for stopping film movement, and the control applies the brake as a function of the velocity.
    • 在照相机中的曝光之间的膜卷绕作为膜速度的函数被中断和/或制动。 摄像机在控制机构中使用速度来响应于检测到薄膜穿孔而将卷绕电动机作为速度的函数停止。 该功能作用于感测穿孔和停止电机或施加制动器之间的时间间隔。 穿孔检测器和速度传感器使用单个感测元件,其在穿孔的相应前缘和后缘处产生第一和第二信号。 第一和第二信号之间的时间间隔指示膜速度,并且优选地根据预定的查找表用于确定停止功能。 然后,控制器在感测相应的一个穿孔并停止所述电动机之间选择适当的时间间隔。 制动器也可用于停止胶片移动,并且该控制作为速度的函数施加制动器。