Electric motor drive for a sewing machine, especially an industrial sewing machine
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United States of America Patent
Stats
-
Feb 28, 1989
Grant Date -
N/A
app pub date -
Nov 17, 1987
filing date -
Dec 11, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a drive for a sewing machine, especially an industrial sewing machine, with a needle that can be reciprocated between an upper and lower end position by a sewing machine main shaft, in which the drive is in direct driving connection with the main shaft and can be controlled at variable speed through a control system, provision is made for improving the dynamic performance of the combination of drive and sewing machine by equipping it with at least one input switch connected electrically to the control system for the input of command pulses for the step-wise actuation of the drive such that with each command pulse a certain, defined amount of movement of the drive and hence of the main shaft is triggered.
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