94 TECHNOLOGY. 
according to the quantity of twist the yarn is to have. g’’ is another eccen- 
tric, by which the wheel 12 is shifted into gear with 13 by means of the 
bell-crank lever r’’, at the end of which is the bearing of the shaft g.  s’’ 
is a plate on the shaft 6 (fig. 10), having on one end four pins, against which 
a spring presses so as to bring the friction-pulley, c. in contact with the 
pulley d, thus to make it turn through a quadrant. On the other side of 
the said plate s’’ are three square escapement pieces, against which presses 
the end of a rod, w’', connected with the end of the horizontal balance 
levers. By either depressing or lifting this lever the rod, w’’, is moved 
from one of the catches on the plate s’, by which it revolves througha | 
quadrant, as has been said, and is then caught by the next escapement on 
the plate s’’. 
In the going-out of the carriage let us suppose the band p to be driving 
both the pulleys, c and’, and the strap p’ to be on the loose pulley o”. 
The rollers are driven by the shaft ¢’, and the carriage moved by the drum 
BE, getting motion by the wheels 8 and 9 (jig. 9). The twist is given from 
the pulley m driving the pulley 1, and the bevel wheel 18, which engages 
with the wheel 17 upon the shafts. The carriage coming near the end of 
its course lifts a catch from a latch (see dotted lines in fig. 8) of the lever s’, 
which sinks a little and is caught by a second catch, which is connected 
by a rod, v’, to a lever, , the latter resting on the boss of the curved arm 
s' (figs. 14 and 15). By the falling of the left hand end of the balance- 
lever, s', the rod «’’ has moved from one of the escapements of the plate s’ 
(jig. 10), and after the shaft b has made a quadrantal motion, it is arrested 
by the finger o” striking against the plate p; by this means the eccentric 
m'’, on the shaft 6, has disconnected the coupling on the shaft f/ (jig. 9). 
The rollers are thus set at rest, while the carriage moves a little longer, but 
very slowly, being driven by the shaft 2 and the wheels 10 and 11 (fig. 9). 
The carriage, having arrived at the end of its course, strikes against a rod 
not seen in the figures, detaching the click, with which, by the lever n/”, 
the wheel 10 was shifted into gear with 11, thus setting at rest those parts 
which gave motion to the carriage. The twisting motion, however, is con- 
tinued till the principal shaft, a, has turned the wheel 25 so far round that 
the finger 0” can strike through the notch in the plate p (jig. 8). The shaft 
b goes on to revolve through a second quadrant, and is now caught by the 
rod wu” at one of the catches of the plate s’. By this quadrantal motion 
the straps are shifted, p moves to the pulley o, alone, and pv’, which moves 
much slower, and in an opposite direction, is shifted to the pulley c, which 
is fixed on the shaft of the twist-pulley m. The latter is therefore now 
turning in the contrary direction, and giving a like motion to the spindles, 
thus backing off the coils of the yarn from the noses of the spindles. At 
the same time, however, a ratchet-wheel, w (jig. 8), on the slant-shaft s of 
the carriage, turns by a click, #’,a plate connected with a spiral piece below, 
to which is attached the end of a chain which passes over two guide- 
pulleys, 2’ and r’, to an arm, a’”, at the top of the carriage, upon the same 
shaft with the pinion 0. 
By the reverse motion of the shaft s, therefore, the faller is depressed till 
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