Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Work and feed motors
Patent
1976-09-27
1979-01-30
Dobeck, B.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Work and feed motors
318600, 318604, 19240, D01H 538, G05B 1928
Patent
active
041374878
ABSTRACT:
A method and apparatus for automatically leveling a band of fibers such as sliver, roving and the like by varying the drafting speed of a drafting mechanism responsive to variations in the thickness of the band. Analogue signals are produced by variations in the thickness of the band and are converted to digital signals for being stored in a digital register. After a period of time, corresponding with the time for conveyance of the scanned point in the sliver up to and into the draft zone, the information is read out of the storage register and converted back to an analogue signal. The analogue signal is compared with another signal representing the actual drafting speed for producing a compared signal for controlling the drafting speed.
REFERENCES:
patent: 3795851 (1974-03-01), Gage et al.
patent: 3938223 (1976-02-01), Grice
Denz Peter
Niestroj Heinrich
Dobeck B.
Schubert & Salzer
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