公开(公告)号：US3752944A

公开(公告)日：1973-08-14

申请号：US3752944D

申请日：1971-11-01

Applicant: CONTROLS CO OF AMERICA

Inventor： WILLIGMAN J ,  CARTIER R ,  OBERMANN G

IPC: H01H43/10 ,  G05B19/06 ,  H01H19/63 ,  H01H43/02 ,  H01H3/42

CPC classification number: H01H43/026 ,  H01H19/63

Abstract: The timer has switches including upper and lower passive blades and an active blade therebetween. The distal end of the lower passive blade has depending spacers which straddle the cam upon which the follower on the distal end of the active blade rides. The spacers reference the lower passive blade off the hub of the drum type program cam. The lower passive blade is provided with a rest or stop for the upper passive blade limiting downward movement of that blade. With precision molding, both passive blades are accurately referenced from the cam hub and the location of the follower which actuates the active blade is precisely located. Accuracy of switching is increased without increased precision in manufacture. Use of two cam tracks permits simultaneous actuation of the active and ''''passive'''' blades to effect faster switching. It is possible to provide a ''''makemake'''' arrangement instead of the double throw arrangement.

Abstract translation: 定时器具有包括上和下被动叶片和其间的有效叶片的开关。 下部被动叶片的远端具有悬挂在凸轮上的固定间隔件，活动叶片的远端上的从动件骑在该凸轮上。 隔离片将下部被动叶片从鼓式程序凸轮的轮毂上引导。 下部被动叶片设置有用于上部被动叶片的休息或停止，从而限制该叶片的向下运动。 通过精密成型，两个被动叶片都从凸轮毂精确地参考，驱动活动叶片的随动件的位置精确定位。 切换精度提高而不增加制造精度。 使用两个凸轮轨道允许同时激活主动和“被动”叶片以实现更快的切换。 可以提供“make-make”而不是双掷装置。