The boy's book of trades and the tools used in themAnonymous
General
The boy's book of trades and the tools used in them
Anonymous
Industrial arts -- Juvenile literature; Vocational guidance -- Juvenile literature
If the cotton is of fine quality it is beaten, or _batted_, with hazel
or holly twigs. For this purpose, it is spread on a frame, the upper
part of which is made of cords and is quite elastic. A woman, with a rod
about three or four feet long in each hand, beats the cotton with great
violence, and so entirely separates the fibre. Any loose impurities which
remain fall out between the cords; seeds and fragments of seed-pods,
which adhere to the cotton somewhat firmly, are picked out by hand.
By this method the cotton is thoroughly opened, and made quite clean,
without injuring the staple.
[Illustration: Opening the Cotton.]
The coarser qualities are passed at once from the willow to the
_scutching_ or _blowing machine_, which does the work of batting, only in
a more violent manner, and is therefore not adapted for fine qualities;
but in coarser spinning is in general use, to prepare the cotton for the
carding engine.
The cotton, which is still in a confused and tangled state, has now to
be carded, upon the regularity and perfection of which process depends
much of the success of spinning, and also the durability and beauty of
the stuff to be woven. A cotton card is a sort of brush, containing wires
instead of bristles. The cards are made of bands or fillets of leather,
or are formed of alternate layers of cotton, linen, and india-rubber
pierced with numerous holes, in which are fixed bent pieces of iron wire,
called dents or teeth.
The fibres of the cotton are not yet sufficiently level to be twisted
into yarn; and it often happens that the teeth of the card lay hold of
a fibre by the middle and thus double it together, in which state it is
unfit for spinning.
The cardings are therefore doubled and drawn out by a machine called a
_drawing frame_, the principle of which depends upon different pairs
of rollers revolving with different degrees of rapidity. If, however,
the riband, as it leaves the carding-engine, were simply extended in
length by drawing it out, it would be liable to tear across, or to be of
a different thickness at different parts of its length. To prevent the
tearing and to equalize the thickness, a number of cardings are joined
together and drawn out to a length equal to the sum of the length of all
the separate cardings.
The effect produced is the same as taking a piece of cotton wool between
the finger and thumb and drawing it out many times, laying the drawn
filaments over each other, before each drawing. If the cotton be then
examined it will be found that all the fibres are parallel and of equal
length. This effect is accomplished very perfectly in the drawing frame,
which consists of a number of rollers arranged in what are called
_heads_, each head consisting of three pairs of rollers, of which the
second pair moves with greater speed than the first, and the third moves
quicker than the second.
[Illustration: Drawing. Thread Frame.]
Public-domain text, read in full here on John Shaqi.
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