in. bobbins are largely used.

Provision is made on each roving frame for changing the size of rove
so as to accommodate it for the subsequent process of spinning and
according to the count of the required yarn; the parts involved in
these changes are those which affect the draft gearing, the twist
gearing, and the builder gearing in conjunction with the automatic
index wheel which acts on the whole of the regulating motion.




CHAPTER X. SPINNING

The final machine used in the conversion of rove to the size of yarn
required is termed the spinning frame. The actual process of
spinning is performed in this machine, and, although the whole
routine of the conversion of fibre into yarn often goes under the
name of spinning, it is obvious that a considerable number of
processes are involved, and an immense amount of work has to be done
before the actual process of spinning is attempted. The nomenclature
is due to custom dating back to prehistoric times when the
conversion of fibre to yarn was conducted by much simpler apparatus
than it is at present; the established name to denote this
conversion of fibre to yarn now refers only to one of a large number
of important processes, each one of which is as important and
necessary as the actual operation of spinning.

A photographical reproduction of a large spinning flat in one of the
Indian jute mills appears in Fig. 20, showing particularly the wide