04173192 is referenced by 38 patents and cites 6 patents.

A hydraulic actuator for transversely shifting the relative positions of a needle bar and the backing material in a tufting machine. An electronic pattern control mechanism drives the hydraulic actuator in response to the predetermined stitch pattern information in the electronic control circuit, which determines the amount of relative transverse shifting of the needle bar for each stitch location. A feedback mechanism associated with the hydraulic actuator creates a feedback signal which is compared with a pattern stitch command signal in order to produce an output signal for shifting the hydraulic actuator to a subsequent transverse needle bar position relative to the preceding needle bar position.

Title
Electrohydraulic needle bar positioning apparatus for tufting machines
Application Number
5/845826
Publication Number
4173192
Application Date
October 26, 1977
Publication Date
November 6, 1979
Inventor
Wallace W Hammel Jr
East Ridge
TN, US
Larry P Gable
Dalton
GA, US
Henry A Schmidt
Elma
NY, US
Agent
Harrington A Lackey
Assignee
Tuftco
TN, US
IPC
D05C 15/30
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