System for protection against getting caught in automatically operable doors or windows, particularly of vehicles
First Claim
1. In an automatically operable closure, the improvement comprising an anti-catching system for protection against getting caught during the closing of the closure, the system comprising:
- means responsive to the movement of the closure for generating an electric position signal whenever predetermined closure positions are reached and including means for generating an extreme-position signal to indicate when an extreme position of the closure has been reached;
at least one electric digital storage element set by at least one of the successive position signals and reset automatically after a preset time interval thereby changing the logic state of the output thereof;
logic circuit means receptive of the output of the at least one storage element and the extreme-position signal for producing a control signal when the output signal of the at least one storage element has an output value corresponding to the reset state and the extreme-position signal has a value corresponding to the closure being in an intermediate position; and
means responsive to the control signal for at least one of stopping and reversing the motion of the closure.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for protection against getting caught in automatically operable doors or windows, particularly of vehicles. Specific intervals of time within which the closing or opening door should reach a given position are preset. When the door does not reach one of these positions within the time allowed, the reversing motion is initiated or the cycle of motions is stopped. For this purpose, an electric signal generator coupled to the door motion delivers electric position signals when predetermined positions of the door are reached. An electric storage element is set by the position signals and after a predetermined time interval automatically reset, with the logic value of its output signal changing. The output signal of the storage element and an extreme-position signal produced by limit switches coupled to the door are fed to a logic circuit which delivers a control signal when the output signal of the storage element has the value occurring upon the latter'"'"'s being reset and the extreme-position signal has the value corresponding to an intermediate position of the door. The control signal is fed to a mechanism for stopping or reversing the door motion.
18 Citations
8 Claims
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1. In an automatically operable closure, the improvement comprising an anti-catching system for protection against getting caught during the closing of the closure, the system comprising:
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means responsive to the movement of the closure for generating an electric position signal whenever predetermined closure positions are reached and including means for generating an extreme-position signal to indicate when an extreme position of the closure has been reached; at least one electric digital storage element set by at least one of the successive position signals and reset automatically after a preset time interval thereby changing the logic state of the output thereof; logic circuit means receptive of the output of the at least one storage element and the extreme-position signal for producing a control signal when the output signal of the at least one storage element has an output value corresponding to the reset state and the extreme-position signal has a value corresponding to the closure being in an intermediate position; and means responsive to the control signal for at least one of stopping and reversing the motion of the closure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification