Sewing machine having presser foot pressure force measuring devi

Details Sewing machine having presser foot pressure force measuring devi Sewing machine having presser foot pressure force measuring devi

1986-05-06

1987-04-28

Nerbun, Peter

Sewing

Elements

Presser devices

7386254, D05B 2900

Patent

active

046604812

ABSTRACT:
A sewing machine having a reciprocating needle bar and a presser foor which is movable upwardly and downwardly to engage material and move it over a sewing station includes a presser foot measuring device. A system for measuring the pressing force of the presser foot of sewing machines comprises a lever type force absorption element which is elastically deformable by the pressing force of the presser foot and which is provided with an electric sensor responding to the deformation. Connected with the sensor is a circuit which contains a digital display on which the pressing force is indicated in newtons.

REFERENCES:
patent: 3055326 (1962-09-01), Greulich
patent: 3554025 (1971-01-01), Andersson et al.
patent: 4166423 (1979-09-01), Brienza et al.
patent: 4289036 (1981-09-01), Barker
patent: 4478092 (1984-10-01), Oren, III
patent: 4565143 (1986-01-01), Hanyu et al.

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