Patent ID: 9051671
Filing Date: 2015-06-09
Classification: D05B

Abstract:
1. For use with a sewing machine having a needle thread drawn from a main thread spool and a bobbin thread wound upon a bobbin, a bobbin thread monitor comprising: a thread pulley rotationally supported in association with a sewing machine; a rotation counter operatively coupled to said thread pulley producing a count which is increased in response to rotation of said thread pulley in a first direction and decreased in response to rotation of said thread pulley in a second opposite direction; display means for displaying said count; and thread guide means for guiding a thread used by a sewing machine to travel about said thread pulley during bobbin loading and sewing operations of a sewing machine, said thread pulley having a thread looped about said thread pulley in a first direction to cause said thread pulley to rotate in a first rotational direction during bobbin loading and in a second opposite direction during sewing operations, said rotation counter increasing said count response to said first direction and decreasing said count in response to said second direction, wherein said rotation counter includes a housing rotationally supporting said thread pulley and said display means.