Textiles: weaving – Warp manipulation – Shedding
Patent
1982-09-23
1984-09-04
Kee Chi, James
Textiles: weaving
Warp manipulation
Shedding
D03C 106
Patent
active
044691416
ABSTRACT:
A reciprocating double lift dobby operating an open shed has a pair of drive members 1, 2 which reciprocate at half the loom frequency and 180 degrees out of phase, one above and the other below a series of shafts 3 which are connected one to each of the loom harnesses and each of which is movable by either drive member between a pair of stationary positions, corresponding to the base positions of the open shed, when required to do so by the weave pattern. One of the stationary positions is defined by a fixed member 5 engaging a stop 15 on the shaft 3, and the other is defined by a catch 8 which engages a lug 18 on the shaft. In each loom cycle, each shaft 3 will either remain in one or other of the stationary positions or will be moved from one to the other depending on the positions adopted by linked selection levers 9, 10, 20 which are controlled by the weave pattern. If a shaft 3 is required to move, the levers 9, 10 will cause a catch 6, 7 on the first of the two drive members 1, 2 which arrives at the current stationary position of the shaft to engage a lug 16, 17 on the shaft and move the shaft to the other stationary position on the next stroke of the drive member, the lever 20 engaging or releasing the catch 8 as necessary. If a shaft 3 is not required to move, the levers 9, 10 do not act on the catches 6, 7 and the drive members 1,2 do not disturb the shaft from its stationary position.
REFERENCES:
patent: 1122650 (1914-12-01), Shayer
patent: 1177343 (1916-03-01), Levy
Chi James Kee
Pakistan Council of Scientific and Industrial Research
LandOfFree
Double lift dobby does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Double lift dobby, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double lift dobby will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1886946