called a Gypsey, for Spinning Hemp and Flax. 365 
before described, to the hatchel-belt, the roving of hemp must be 
advanced more rapidly to the drawing-rollers S'S, and by this the 
filament receive a greater accession of fibres in a given time. 
When by this accession of fibres the filament is increased to the 
proper size, the top roller will rise and the clutch-boxes will be 
carried to the left, the catch m be disengaged from the pin /, and 
the hatchel-belt and roving will rest. It will be seen that while 
the wheel # is driven by the wheel g’, the wheel g must be driven 
by the wheel i; in this state of things the pin & will make more 
revolutions in a given time than the catch n, and as they come in 
contact with each other it is necessary that & should pass n with- 
out a permanent locking. Now when & strikes n in this way, the 
contact is upon the sides opposite to those which were struck 
when k was driven by n; and to let them pass each other, the 
sides or corners of both n and k, which would otherwise catch 
and interrupt the motion, are taken off, and the end of the pin 
and the edge of the catch form inclined planes, which sliding 
upon each other, the catch is forced backwards against the resis- 
tance of the spring heretofore described, and thus & passes by n; 
the spring always causing n to return to its former position after 
kK has passed it. Figure 13 shows the form ofmandk. 4d 4d 
are the faces which strike when & is driven by n; and 5d 5d are 
the inclined planes which meet when the wheel g is driven by 
the wheel i. 
Let us now consider the operation when the filament is too 
large. Suppose that the advancement of the roving, as before 
described, brings so great a number of the ends of fibres in con- 
tact with the drawing-rollers, that the filament not only attains a 
sufficient size, but becomes too large. In this case the upper 
roller, supported upon the filament, is elevated above its ordinary 
place; and by means of the connexions heretofore described, the 
87 
