Device for detecting fabric thickness of a sewing machine

Details Device for detecting fabric thickness of a sewing machine Device for detecting fabric thickness of a sewing machine

1986-03-03

1987-01-06

Nerbun, Peter

Sewing

Special machines

Darning

112270, D05B 1900

Patent

active

046337946

ABSTRACT:
A detecting device for detecting a thickness of a fabric inserted between a presser foot and a needle plate of a sewing machine includes an electric iron core having an electric coil and inserted at a space between the needle plate and the fabric presser foot, into which a fabric under stitching is fed. Said space is changed by the fabric thickness. The device detects a change in said space and calculates a length of the changed space.

REFERENCES:
patent: 3976019 (1976-08-01), Allen et al.
patent: 4166423 (1979-09-01), Brienza et al.
patent: 4258326 (1981-03-01), Johne
patent: 4276547 (1981-06-01), Bowen
patent: 4301757 (1981-11-01), Tonomura
patent: 4565143 (1986-01-01), Hanyu et al.

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