Multi-stage presser lifter device

Details Multi-stage presser lifter device Multi-stage presser lifter device

1981-06-19

1983-10-18

Rimrodt, Louis

Sewing

Elements

Presser devices

D05B 2902

Patent

active

044099142

ABSTRACT:
A presser lifting arrangement for an industrial sewing machine having a knee shift device which manually elevates a presser foot to a height above the work fabric to permit free movement of the work fabric therebeneath. Further motion of the knee shift device actuates a snap action switch which operates to connect a solenoid to a source of power to elevate the presser foot to its maximum height. In a second embodiment, the knee shift device includes internal switch contacts which energize a first solenoid to raise the presser foot a distance sufficient to permit free movement therebeneath, and continued actuation of the knee shift pad actuates a snap action switch which energizes a second solenoid to raise the presser foot to its maximum height.

REFERENCES:
patent: 1033997 (1912-07-01), Drake
patent: 3298341 (1967-01-01), Bonis
patent: 3347194 (1967-10-01), Hale et al.
patent: 3353511 (1967-11-01), Marino
patent: 4246856 (1981-01-01), Sansone et al.

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