Patent · US Expired

Electric motor drive for a sewing machine, especially an industrial sewing machine

US4807548A · kind A · utility

5Cited by

3References

3Claims

0Family size

Assignee

Frankl & Kirchner GmbH & Co. K.G. · DE

Inventors

Gustav Rohr · Heidelberg, DE
Gerd Nohl · Wiesloch, DE

Key dates

Filing date	Nov 17, 1987
Grant date	Feb 28, 1989
Priority date	—
Expiry date	Nov 17, 2007

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD05B69/22
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.