IMPROVEMENTS IN MACHINERY AND APPARATUS APPLICABLE TO SPINNING FRAMES, TO PREVENT WASTE AND DOUBLE YARN
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Frederick Craven, Arthur Craven
aud William Allan at the Office of the Commissioners of Patents on the
6th October 1882.
FREDERICK CRAVEN and ARTHUR CRAVEN of the firm of Craven and Craven
Spinners and WILLIAM ALLAN, mechanic, all three of Bradford in the County of
York "IMPROVEMENTS IN MACHINERY AND APPARATUS APPLICABLE TO SPINNING
FRAMES, TO PREVENT WASTE AND DOUBLE YARN."
Our invention relates to fitting to spinning frames an apparatus for stopping the
progress of the roving towards the delivery rollers on the slackening or breakage
of the spun thread, preventing waste, doubles, snarls and roller lapping; and the
apparatus is applicable to frames employed in spinning worsted, mohair, alpaca,
botany silk, cotton and other fibres.
For this purpose instead of enploying the coupled back or feeding rollers
heretofore in use, we make the back top pressing or feeding rollers separate and
give the rollers a slight lifting action on the slackening or breakage of the spun
thread or yarn, removing the same from contact with the bottom pressing or
feeding roller.
The thread or yarn coming from the back top rollers passes through the carriers
and between the front rollers and from there over the bent end of a light lever and
through the top board as usual.
;
On the slackening or breakage of the thread or yarn, the bent light lever rises
and the back weighted arm of the lever falls, which brings the said back arm in
contact with a revolving tappet fitted on a shaft extending the length of the frame
it will be well understood that an apparatus is provided for each spindle and
consequently a tappet is fitted on the shaft for each spindle; a tappet in coming in
contact with the back arm throws forward a rod which is connected to a tongued
Llever and which lifts up the top back pressing roller clear of the bottom roller
carrying the drawing or roving yarn with it, which is then seized and gripped
between the tongue of the L lever and the bottom of the top back pressing roller
preventing any delivery of the yarn. The light bent lever and back arm are made
in one piece and a pin is secured in the back arm near the fulcrum; this pin works
in a slot hole formed in a small lever or crank which works on the stud on which

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the bent lever works; the slot hole is for the purpose of allowing a slight vibrating
action to the bent lever during the spinning operation, thereby allowing an accurate
balancing of the bent lever. When the back end of the bent light lever falls it
comes in contact with the revolving tappet which forces down the lever and brings
the long rod towards the front of the frame, bringing the tongue of the L lever in
contact with the underside of the top back roller which grips and holds tight the
drawing or roving yarn and at the same time lifts up the top back roller from
contact with the bottom roller.
To each roller we fit an extra stand onto the back saddle bar on which the
tongued lever is fulcrumed and on the arbor of the back top roller is fitted a
claw to which is secured a spiral spring to give the required pressure or weight
to the back top pressing roller; the pressure or weight is regulated by a thumb
screw.
The tongued lever between the fulcrum and the eye through which the long
rod passes is made with a lug in the hole of which is secured the end of a short rod
over which is passed a spiral spring and the top end of the rod is cut with a screw
on which screws a thumb screw to put more or less pressure on the spiral spring
according to requirements. We put more pressure or weight on the spiral spring of
the tongued lever than on the spiral spring of the top back roller to allow the
Llever to move forward and throw up the tongue to seize and hold firmly the
drawing or roving yarn on the slackening or breakage of the spun thread or
yarn and also to lift up the top back roller, from contact with the bottom roller.
1
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