LOOM AND SPINDLE—HOOPER. 667 
In this drawing 50 wire hooks are seen standing upright on the 
bottom board of the machine. The bottom board is perforated with 
as many holes as there are hooks in the machine, in this case 400. 
The hooks represented are only one rank out of eight, which the ma- 
chine contains. Each hole in the bottom board has a dent or groove 
eut across the top, in which 
the bent end of the wire hook 
rests. This keeps the hook 
firmly in position, especially 
when the necking cords of 
the harness are brought up 
through the holes and looped 
on to the wire. 
Figure 50 gives two sec- 
tions of the machine, one 
showing it at rest and the 
other showing it in action. 
In both sections 8 hooks are 
drawn, 1 from each rank of 50. 
The hooks have the necking | 
cords attached at the lower Fic. 50.—Seetions of Jacquard machine. 
ends, and just below the smail 
hook at the top may be seen a set of eight wires crossing them at 
right angles. Each of these wires, called needles, is bent into a loop 
or eye, where it crosses one of the hooks, and it is because the hook 
is passed through this eye that it is retained in an upright position. 
Figure 51 will show this arrangement quite clearly. 
Each hook thus resting on the bottom board, and held down by 
the weight of the leashes of 
the harness, though supported 
at the top by the eye of the 
needle, through which it 
passes, is still free to rise and 
raise with it the leash or 
leashes to which it is attached. 
Leaving the hooks thus 
standing, let us consider the 
arrangement for lifting them. 
_ Fie. 51.—Diagram of hooks and needles in a Above the hooks the section 
Oi hee of a solid block of heavy wood 
or iron is shown. This block runs from end to end of the machine, 
and has projections at its ends which fit into the narrow spaces 
between the two pairs of uprights of the machine frame in such a 
manner that the block can be caused to slide up and down steadily 
but freely. 
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