Control for electrical positioning drives

Details Control for electrical positioning drives Control for electrical positioning drives

1977-10-31

1979-02-13

Albritton, C. L.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338118, 338123, 338138, 338140, 338153, 338162, 338188, 338190, 338320, 338325, H01C 1016

Patent

active

041398319

ABSTRACT:
An apparatus for the control of variable speed electrical positioning drives, especially for sewing machine positioning drives, is disclosed in two exemplary embodiments. The apparatus provides a preset nominal value of speed and a range of adjustment for additional signals in digital form, thus making possible a continuous or incremental change in the nominal value as well as additional digital signals. The apparatus includes lamellar contact elements of a potentiometer arranged on a base element in the path of a slider for the nominal value of speed and at least one low resistance lamellar contact element arranged in the slider path for producing an additional digital signal.

REFERENCES:
patent: 1772361 (1930-08-01), Mross et al.
patent: 3307133 (1967-02-01), Wolff
patent: 3965454 (1976-06-01), Puerner

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