FIG. A.
FIG. B.
FIG. C.
The leading characteristic of dobbies is, that by means of pegs placed in revolving lattices, any heald can be selected and raised by the machine.
The favourite dobby is the improved Keighley, first patented in 1867 by Messrs. Hattersley & Smith, of that town—it was used to a considerable extent, but recent improvements have greatly increased its value. [Plate VII]. and [Fig. 48] show a general view of the machine—one of Henry Livesey’s, Limited, make, on Ward’s principle, 20 jacks, double lift. At the under side is seen a pegged lattice; immediately above the pegs and resting on the topmost lag is a row of levers, double the number of shafts or jacks representing the capacity.
The [T] knife lever works on the centre shown, and slides the knives backwards and forwards in grooves at A and B.
The jacks to which at one end the heald cords are attached have at the other end latches fixed to them, which are out of the way of the sliding knives, unless purposely dropped on to them.