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1. 发明授权

US5648834A Film tension sensing device 失效
标题翻译：薄膜张力传感装置
公开(公告)号：US5648834A
公开(公告)日：1997-07-15
申请号：US598813
申请日：1996-02-09
申请人： Dean J. Kitchen
发明人： Dean J. Kitchen
IPC分类号： G03B1/54 , G03B21/00
CPC分类号： G03B1/54
摘要： A tension sensing device for motion picture projection equipment is intended for use in a platter feed system. The device is mounted upon a column of a platter system, having a pivoting arm and a stationary or limiting arm. The film is fed over a roller on the pivoting arm, which rests on a micro-switch. The presence of tension in the film feed will cause elevation of the pivot arm, triggering a signal from the micro-switch to a control box. A timing sequence is initiated; if a pre-determined time interval is reached, the power to the projector equipment is interrupted. This device allows for more precise determination of true headwrap condition, avoiding false conditions, and offers a more durable and reliable sensing device.
摘要翻译：用于电影投影设备的张力感测装置旨在用于盘片进给系统中。该装置安装在具有枢转臂和固定或限制臂的盘片系统的柱上。胶片通过位于微动开关上的枢转臂上的辊上。胶片进给中张力的存在将导致枢轴臂升高，触发从微动开关到控制箱的信号。启动时序; 如果达到预定的时间间隔，投影机设备的电源就会中断。该装置允许更精确地确定真实的包装条件，避免假条件，并提供更耐用和可靠的感测装置。

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