Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – With mounting or supporting means
Patent
1997-08-13
1999-10-05
Jillions, John M.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
With mounting or supporting means
160201, 49 28, 49199, 254270, 200 85R, B66D 158, E05F 1500
Patent
active
059608498
ABSTRACT:
An apparatus that detects the occurrence of slack in a cable and that compensates for detected slack is disclosed. The apparatus includes body parts that are movable relative to each other between fully extended and fully retracted positions. A bias device biases the body parts toward the fully retracted position. However, normal tension conditions in the monitored cable overcome the bias and extend the body parts to their fully extended relation. If the cable becomes slack, the body parts retract to take up the slack. If the cable slack is to such an extent that the body parts move to a predetermined relative position, the apparatus generates a signal warning of extreme slack conditions. The present invention also is a cable slack control apparatus for a door operator, with such control apparatus including a cable slack detection and compensation device and a door motor drive control device. The present invention further contemplates a method of detecting and compensating for cable slack by reliance on the slack detection and compensation device disclosed herein.
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Balli Robert Edward
Delaney Charles Edward
GMI Holdings Inc.
Jillions John M.
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