Method and dobby for synchronizing all heddle frames of a weavin

Details Method and dobby for synchronizing all heddle frames of a weavin Method and dobby for synchronizing all heddle frames of a weavin

1981-08-11

1983-11-29

Kee Chi, James

Textiles: weaving

Pattern mechanism

Cylinder motions

139 68, 139324, D03C 1504, D03C 100

Patent

active

044176040

ABSTRACT:
A method and apparatus for synchronizing all heddle frames of a weaving machine which are operated by a punched-card-controlled dobby. The pattern card cylinder or the reading needles are moved to positions in which during a read, all the reading needles simultaneously engage the pattern card webs between the control points or the holes of the pattern card. Through this, the heddle frames are moved to the lower shed position by further operation of the dobby.
In a preferred embodiment, the card cylinder is stopped in the center of the indexing movement effected by the driving projection of the drive shaft. The driving projection is laterally uncoupled from a ratchet gear by a hand lever and, simultaneously, further movement of the ratchet gear is prevented by the engagement of a locking member in a tooth space of the ratchet gear.

REFERENCES:
patent: 2856964 (1958-10-01), Bergstrom et al.
patent: 3002535 (1961-10-01), Bergstrom et al.
patent: 3407848 (1968-10-01), Fumat

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