Anticatching device for automatic doors or windows
First Claim
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.
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Accused Products
Abstract
An anticatching device for automatic doors or windows, especially of vehicles. The motion of the door or window is divided into several segments and the time required to pass through a segment is compared with a given time interval. These given time intervals are obtained by storing the time intervals measured during each preceding motion of the door between the same positions. Once the time intervals have been compared, a control signal that stops or reverses the motion of the door is released only when the measured value is greater by a predetermined tolerance than the stored value. To determine the position and direction of motion of the door, the successive position signals are assigned values that are compared and this comparison produces a signal that indicates whether the door is opening or closing.
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Citations
10 Claims
- 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.
Specification