US PATENT SUBCLASS 112 / 273
.~.~ Thread sensing

Current as of: June, 1999
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112 /   HD   SEWING

270  DF  ELEMENTS {21}
271  DF  .~ Starting or stopping {5}
273.~.~ Thread sensing

DEFINITION

Classification: 112/273

Thread sensing:

(under subclass 271) Devices which sense a condition of the sewing thread, such as its slackness, a break or run out, and cause the sewing drive mechanism to start or stop in response to the condition sensed.