The bearings of the pattern cylinder are so constructed that the cylinder can be instantly changed to allow either a 400 or a 600-hole cylinder to be used, so that the bearings can be adjusted to adapt them for either size cylinder.
The bearings of the feed cylinder, whereby the chain of cards to be cut is moved, are constructed and supported so as to enable them to be readily adjusted to suit slight variations in the tightness with which the cards are laced, or in a greater degree to suit large or small cards, and the mechanism whereby the cylinder is operated is capable of ready adjustment for the same purpose.
It is well known that the punching of a great number of holes simultaneously, even in cardboard, requires great power, and entails enormous shock and great wear on the machine; to obviate this difficulty, the punches are slightly varied in length relative to their keys, so that they will not all act on the cards at exactly the same instant, and the strain on the machine and power required are thereby greatly reduced.
Is indispensable to the machine. This is a separate little machine, designed to set upon a bench or table, and is used especially for cutting the peg and lace-holes. It may be operated very readily by hand, but if desired, is easily adapted to run by power. The feeding is done by one motion of the hand, and once handling of the card; the cards leave the press by gravitation, and arrange themselves in piles. The press is arranged to cut cards for 400 or 600 machines.
Two methods are observed for lacing Jacquard cards: _A_, hand-lacing on a common frame; _B_, lacing by power.
For this purpose the cards are put on a common frame containing on its surface pegs of a corresponding size to those used on the cylinder. The pegs on the frame are made of hard wood, and the pegs of the cylinder of brass. These pegs on the frame are located at exact distances apart, and the frames are built to hold from 30 to 50 cards, superficially arranged.
Figs. 30 and 31 illustrate the frame under _S_, showing at _a_ three cards arranged for a fabric, with a twill effect from left to right; and at _b_ the same cards arranged for a twill in the opposite direction, from right to left. These frames are arranged to slide into each, so as to adapt them to the distances of the peg-holes in the cards. To give a clear understanding as to the distance of these pegs from each other a few measures most generally used for lacing frames are given.