THREAD TENSIONER FOR A SEWING MACHINE
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United States of America Patent
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Issued Date -
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app pub date -
Feb 26, 2015
filing date -
Oct 16, 2014
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Thread tensioner for a sewing machine. In one example embodiment, a thread tensioner for a sewing machine includes a first disk, a second disk, a spring, a mechanism, and a sensor. The second disk is positioned next to the first disk. The spring is configured to apply tension to a thread positioned between the first disk and the second disk by exerting a force against the second disk. The spring defines a first end, a second end, and a length between the first end and the second end. The mechanism is configured to cause the length of the spring to shorten and to allow the length of the spring to lengthen. The sensor is configured to track a current length of the spring by measuring a dimension of at least a portion of the spring.
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