US 9,518,348 B2 · Sewing machine having changeable presser foot

Abstract

A presser foot has a rod pin and is received by an engagement groove provided with a presser holder. By measuring the resistance value of the rod pin, the rod pin is identified. Terminals are provided with the engagement groove, which contact the rod pin for measuring the resistance. The terminals are connected to a circuit that connects to a circuit of a presser bar. A receiving groove is formed at the presser holder, an inserting part is formed at the lower end of the presser bar, and the presser holder is connected to the presser bar by setting the inserting part in the receiving groove and fixing it. The terminals and the circuit are provided with the inserting part connecting to the electrical resistance measuring apparatus where the resistance of the rod pin is measured, then determination apparatus identifies the rod pin and a display informs the result.

Claims6

Dependent claims

A sewing machine having a changeable presser foot comprising:

A support member for supporting the presser foot,
A plurality of presser foots changeably adapted to attach to said support member,
An electrical resistance member provided with said each presser foot, each said electrical resistance member having a characteristic resistance value,
An electrical resistance measuring apparatus for measuring the resistance value of said electrical resistance member,
A determination apparatus for identifying the presser foot from the resistance value measured, and
A display for informing a result from the determination apparatus.

3 more elements

Dependencies are inferred from the claim text.

Sewing machine having changeable presser foot

Life of this patent

Sewing machine having changeable presser foot

Life of this patent

Abstract

Claims6