Sewing machine

Details Sewing machine Sewing machine

1983-10-25

1986-05-06

Nerbun, Peter

Sewing

Elements

Starting or stopping

D05B 6922

Patent

active

045864489

ABSTRACT:
A foot control of the sewing machine can be actuated from a neutral position in two directions. In one case, a variable resistance becomes effective which produces regulating voltages within a determined range. A logic circuit with comparators produces for this voltage range a condition in which the driving motor of the sewing machine is controlled to operate with a number of turns corresponding to the voltage range. When the machine is stopped the needle is automatically positioned in its upper stop position. By repetitive actuation backward of the foot pedal the needle may be positioned in its bottom stop position and again in its upper stop position and so on. The logic treatment of the control signals from the foot control permits to transmit these signals for all required instructions through a two wire cable which is already required for the speed control.

REFERENCES:
patent: 3636902 (1972-01-01), Matsubara et al.
patent: 4173193 (1979-11-01), Morinaga et al.

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