THE HAMMER.
Fig. X.
[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.
The following are accurate measurements of this part of the machine:
| Height of head of hammer at a and b, | = | 1/4 | inch. |
| Thickness of hammer-head, e to c, | = | 3/8 | inch. |
| Height of hammer-head when at rest above the top guiding part, c to o, | = | 1-1/2 | inch. |
| Width of the guiding-rod, c to d, | = | 1/2 | inch. |
| Thickness of “top guide,” f to g, | = | 3/4 | inch. |
| Thickness of “lower guide,” f to r, | = | 1/4 | inch. |
| Distance between these guides, | = | 9 | inches. |
| Total height of guiding-rod, | = | 10-1/2 | inches. |
The shaded part of the drawing above the hammer represents the cylinder, i, which has its shaft for turning at m.