Textiles: weaving – Warp manipulation – Shedding
Patent
1987-01-29
1988-08-16
Jaudon, Henry S.
Textiles: weaving
Warp manipulation
Shedding
D03C 100
Patent
active
047636971
ABSTRACT:
Mechanism to control the oscillations of connecting rods operating the heald frames in a rotary dobby, of the type wherein, for each frame and connecting rod: the rod is mounted on a drive shaft by way of an eccentric interposed between the shaft and the connecting rod small end; the eccentric can be controlled for rotation, alternatively with the connecting rod or with the shaft, by means of a radial key; mechanism is provided to shift the key to the outer position of engagement of the connecting rod small end; a spring is provided to return the key to the inner position of engagement of the shaft; and an electromagnet is provided to hold, when energized, the key in the outer position of engagement of the connecting rod small end. The electromagnet consists of a pair of magnets, positioned opposite externally to the connecting rod small end and adapted to be alternatively energized, a permanent magnet being associated with one of the magnets, the permanent magnet having a field equal and opposite in sign to that produced by the magnet when it is energized.
REFERENCES:
patent: 4362188 (1982-12-01), Surkamp
patent: 4480664 (1984-11-01), Hohne et al.
patent: 4497346 (1985-02-01), Hintsch et al.
patent: 4646788 (1987-03-01), Brock et al.
Fimtessile Fabbrica Italiana Macchinario Tessile S.p.A.
Jaudon Henry S.
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