Method and apparatus for detecting residual bobbin thread in a s

Winding – tensioning – or guiding – Coil holder or support – Spool or core

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112278, 242 22, 318135, B65H 6300, D05B 5100, H02K 4100

Patent

active

057881715

ABSTRACT:
An apparatus is disclosed which detects the residual quantity of bobbin thread on a sewing machine bobbin when the shuttle containing the bobbin is located at a specific phase position. The apparatus includes a detection rod driven by a solenoid so that one end contacts the outer periphery of the residual bobbin thread. A sensor signals when the amount of residual thread is less than a predetermined quantity.

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