It is necessary to keep the needle-eyes in the proper place, otherwise it would result in bending the hook out of its perpendicular position, and by lowering the griffe its bars would possibly come in contact with the head of the hook, crushing the latter, or doing more damage if not detected at once. Each needle or hook, if worn out, can be replaced by pulling out the pin, _o_, thus loosening the needle and giving a chance to work the required hook out of the needle-eye.
Fig. VIII. represents the batten motion to be attached to the guiding-rod, [see No. 14, in Fig. I.], and the frame, [see No. 16, in Fig. I.] The batten, 2, is connected to a triangular lever by means of lever, _d_. Another vertical lever connects the lower part of this triangular lever to a projecting bolt, _k_, fixed to the guiding-rod of the griffe. By raising the guiding-rod, thus raising lever, _k_, in the direction of the arrow, the batten is thrown outwards, [see direction of arrow below _c_], returning again to its former position at the lowering of the griffe. _f_ indicates the place where the triangular lever is fastened (movable) to the projecting bolt, extending out of the frame. _a_ indicates the place for the cylinder. Part 1 of the batten is movable at _l_ in the direction of arrow, _s_, allowing the cylinder to be inserted. Part 1 is fastened (after putting the cylinder in at _a_), to 2 by means of the screw, _n_.
Fig. IX. represents the cylinder, with the lantern for turning the same by means of the catches. The dimensions for the cylinder in the present machine are as follows:
Height of cylinder, = 2-7/16 inches. Width " " = 13 " " " lantern, = 1-1/2 " Average length of spindle, = 2 "
This cylinder is carried in the batten, the latter moving in the groove provided for it under 10, Fig. I. This batten has sufficient vibratory motion to enable it to move the required distance away from the needle-board. After coming in contact with the catch it still moves until the cylinder has performed a complete turn. The cylinder is steadied in the required position by the hammer pressing by the means of a spring towards the lantern from below.
Fig. X. illustrates the hammer as attached to the batten; _a_ to _b_, (equals 3 inches in width in our present illustration), represents the head of the hammer, forming the foundation for steadying the cylinder in its turning. The hammer is pressed for this purpose towards the cylinder by means of the spring, _s_ to _r_. Parts _h_ and _k_ guide the hammer in its up and down movements, and are solid parts of the batten. By turning the cylinder the hammer is pushed down in the direction of the arrow, _t_, thus compressing the spring, which returns to its normal position after the cylinder has completed its turn, ready for being advanced towards the needle-board.