Arrangement for handling a sewing machine

Details Arrangement for handling a sewing machine Arrangement for handling a sewing machine

1989-03-15

1990-11-20

Nerbun, Peter

Sewing

Elements

Starting or stopping

112220, 367 95, D05B 6918

Patent

active

049709780

ABSTRACT:
The invention comprises an arrangement for controlling a machine by means of the body movement of the operator. It is used for controlling a sewing machine intended for a handicapped person or for an operator not using the foot control. A pulse (18) consisting of a number of periods of 40 kHz sound waves are emitted from a loud-speaker (15). The sound waves are reflected by the head of the operator and a digital circuit measures the time takes the sound pulse to return to the receiver (16). The distance measured to the head of the operator is then used to proportionally control the speed of the machines motor.

REFERENCES:
patent: 3218530 (1965-11-01), Momberg et al.
patent: 3953770 (1976-04-01), Hayashi
patent: 4281734 (1981-08-01), Johnston
patent: 4420751 (1983-12-01), Paganini et al.
patent: 4469038 (1984-09-01), Fujikawa

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