×

Anticatching device for automatic doors or windows

  • US 4,533,901 A
  • Filed: 03/23/1982
  • Issued: 08/06/1985
  • Est. Priority Date: 03/25/1981
  • Status: Expired due to Term
First Claim
Patent Images

1. In an anticatching control device for automatic doors or windows of vehicles and the like, having an electric signal generator coupled with a movable member of a door or window mechanism to produce an electrical position signal every time the member reaches a predetermined position and circuit means receptive of the position signals for measuring the time interval between two consecutive signals and comparing same with given time intervals to produce a control signal when there is an unfavorable comparison to effect the stopping or reversing of the motion of the member, the improvement wherein the signal generator produces at least two position signals during the movement of the members between predetermined positions corresponding to selected segments thereof in the closing direction and in the opening direction and wherein the circuit means comprises means for storing previous measured time intervals for each segment for the closing direction and for the opening direction and means for comparing a current measured time interval to a previous measured time interval for that same segment and for the same direction to produce said control signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×