AN IMPROVED STOP MOTION, APPLIED TO THE ROLLERS OF DOUBLING. SPINNING, AND TWISTING FRAMES
Year: 1877

page_text: LETTERS PATENT to Thomas Townsend, of Nuneaton, in the County of Warwick,
for the Invention of "AN IMPROVED STOP MOTION, APPLIED TO THE ROLLERS
OF DOUBLING. SPINNING, AND TWISTING FRAMES."
Sealed the 26th June 1877, and dated the 13th April 1877.
PROVISIONAL SPECIFICATION left by the said Thomas Townsend at the
Office of the Commissioners of Patents on the 13th April 1877.
"AN IMPROVED
THOMAS TOWNSEND, of Nuneaton, in the County of Warwick.
STOP MOTION, APPLIED TO THE ROLLERS OF DOUBLING, SPINNING, AND TWISTING
FRAMES."
The object of my Invention is to prevent waste and other irregularities in
doubling, spinning, and twisting frames when the yarn breaks.
It frequently occurs that when one of the two threads being doubled happens to
break, the broken thread becomes lapped round the top delivery roller, thus causing
waste or entangles with the yarn of the adjacent spindle, producing the irregularity
called "three or four folding," until it is remedied by the attendant.
My Invention consists in an improved stop motion or device for arresting the
motion of the top delivery roller immediately the yarn breaks, so that the supply of
yarn is stopped until the broken yarn is pieced, and all waste from the causes above
inentioned is avoided. This stop motion, of which there is one for each spindle,
consists of a light lever mounted on centres behind or beneath the delivery rollers,
and having a long arm extending beneath the delivery rollers to the front of the
frame, and terminating in a bent end or lateral pin, under which the yarn passes on
its way from the delivery rollers to the flyer. A wire or rod extends along the
front of the frame to support the yarn under the weight of the lever, which is held
up by the yarn.
A pair of wires are jointed by one end to the short arm of the lever, the
other ends of the wires being pointed and resting on the lower delivery roller,
close to, but just clear of, the nip of the rollers, so that immediately the long
arm of the lever falls by the breakage of the yarn these wires are pushed between
the rollers, and being nipped thereby are drawn between them by the revolution of

page_text: the rollers, whereby the top roller is lifted clear off the bottom roller, and the motion
of the former (which is merely driven by contact with the latter) is at once arrested,
and the supply of yarn ceases until the accident is repaired and the stop motion
readjusted.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Townsend in the Great Seal Patent Office on the 13th October
1877.
"
AN IMPROVED
THOMAS TOWNSEND, of Nuneaton, in the County of Warwick.
STOP MOTION, APPLIED TO THE ROLLERS OF DOUBLING, SPINNING, AND TWISTING
FRAMES."
The object of my Invention is to prevent waste and other irregularities in
doubling, spinning, and twisting frames when the yarn breaks.
It frequently occurs that when one of the two threads being doubled happens to
break the broken thread becomes either lapped round the top delivery roller, thus
causing waste, or entangled with the yarn of the adjacent spindle, producing the
irregularity called "three folding" or "four folding," until the accident is repaired
by the attendant.
My Invention consists in an improved stop motion or device for arresting the
supply of yarn to the particular spindle immediately the yarn, or one of the yarns,
to that spindle breaks. Thus all waste from the causes above mentioned is avoided.
This stop motion, of which there is one for each spindle, consists of a light lever,
mounted on an axis behind or beneath the delivery rollers, and having a long arm
extending beneath the delivery rollers to the front of the frame, and provided at
its extremity with a lateral arm, under which the yarn passes on its way from the
delivery rollers to the flyer. A wire or rod extends along the front of the frame to
support the yarn under the weight of this lever, which is held up by the yarn.
The supply of yarn may be arrested either by stopping the movement of the top
delivery roller, or by severing the yarn before it enters the delivery rollers, or both
means may be used conjointly.
In the first case, a pair of wires are jointed by one end to the short arm of the
lever, and their outer ends are pointed and rest on the lower delivery roller, close
to, but just clear of, the nip of the rollers, so that immediately the long arm of the
lever falls by the breakage of the yarn these wires are pushed between the rollers,
which in revolving pip the wires and draw them between them, whereby the top
roller is lifted clear off the bottom roller, and the motion of the former (which is
merely driven by contact with the latter) is at once arrested, and the supply of yarn
ceases unt the accident is repaired and the stop motion readjusted.
In the other case the axis of the lever is a round pin, with a longitudinal slit
working in a corresponding tube or socket, also slit, through which slit the yarn
passes on its way to the delivery rollers. So long as the long arm of the lever is
held up by the yarn the two slits coincide, and the yarn passes freely, but when the
yara breaks, and the lever drops, its axial pin performs a partial revolution within
the tube or socket and the slips no longer coincide, whereby the yarn is either
severed, the edges of the slits acting like shears, or if not severed it is tightly
gripped, so that all further supply of the yarn is stopped.

page_text: a is the yarn, on its way from the creel to the delivery rollers b, b, and thence to
the spindle c. d is the long arm, and e the short arm of the stop motion, both
arms being fixed to a cylindrical pin f, fitted to rotate within a tubular socket g,
fixed in a bracket h, attached to the back of the peg rail . The arms d, e, are of
light wire, and are bent at a right angle at their extremities, the bent end d' of the
arm & resting on the yarn a, which passes under it, and is supported under the
weight of the said arm by a wirek that extends across the front of the frame, and
over which the yarns of all the spindles pass. To the bent end e¹ of the arm e a
forked wire, or a pair of wires L, connected as shown in Figure 2, are jointed, the
forked extremities i of which are flattened, and lay on the lower delivery roller b,
as shown, in such position as to be pushed between the rollers, and raise the top
roller off the lower one immediately the yarn (or one of the yarns in the case of
two) breaks, and allows the lever d to fall, as indicated in dotted lines.
Instead of, or in conjunction with, the use of the wires for lifting the top
delivery roller the supply of yarn may be arrested by passing it through the longi-
tudinal diagonal slit in the pin or axis f, and a corresponding slit g' in its
socket g.
So long as lever d is held up the two slits coincide, but immediately it
falls the yarn is severed or gripped tightly by the rotation of the pin fin its
socket g.
Having described the nature of my Invention, and the manner of performing the
same, I declare that what I claim as my Invention to be protected by the herein-
before in part recited Letters Patent is, a stop motion, constructed, operating, and
applied substantially in the manner and for the purposes herein specified.
In witness whereof, I, the said Thomas Townsend, have hereunto set my
hand and seal, this Tenth day of October, in the year of our Lord Ono
thousand eight hundred and seventy-seven.
THOS TOWNSEND