IMPROVEMENTS IN MACHINERY AND APPARATUS APPLICABLE TO SPINNING FRAMES TO PREVENT WASTE AND DOUBLE YARN.
Year: 1879

page_text: LETTERS PATENT to Thomas Coltman, of the Town of Leicester, in the
County of Leicester, for the Invention of "IMPROVEMENTS IN MACHINERY AND
APPARATUS APPLICABLE TO SPINNING FRAMES TO PREVENT WASTE AND DOUBLE
YARN.
"
Sealed the 16th May 1879, and dated the 3rd March 1879.
PROVISIONAL SPECIFICATION left by the said Thomas Coltman at the
Office of the Commissioners of Patents on the 3rd March 1879.
THOMAS COLTMAN, of the Town of Leicester, in the County of Leicester. "LM-
PROVEMENTS IN MACHINERY AND APPARATUS APPLICABLE TO SPINNING FRAMES TO
PREVENT WASTE AND DOUBLE YARN."
My improved machinery and apparatus is applicable to frames employed in
spinning worsted, mohair, alpaca, botany, silk, cotton, and other fibres.
Heretofore the back or delivery roller in spinning frames has been a roller fluted
in sections; my improvements consists in providing tubular grooved sections which
revolve with but are capable of revolving upon a shaft; each section is provided
with a collar secured on and revolving with the shaft; each collar is provided with
a spring catch, the projecting end of which takes into recesses in one end of a
grooved section; on the same end of the section a ratchet wheel is placed having a
stud projecting from one side which takes into a recess in the circumference of the
section; the ratchet wheel is provided on its inside with inclines so arranged that
when a clawker engages in the teeth of the ratchet wheel the spring catch carried
by the collar is forced down by the inclines, and the ratchet wheel and grooved
section is prevented from revolving with the shaft. The clawker is balanced and
turns upon a pin or axis secured to the framing; the clawker is also provided with
a swivelled centre adjustable on a rod, the outer end of which is hinged to one end
of a lever having its other end resting upon the thread to be spun; upon the thread
breaking, the clawker enters one of the teeth of the ratchet wheel and arrests the
revolution of the grooved section.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Coltman in the Great Seal Patent Office on the 12th
August 1879.
THOMAS COLTMAN, of the Town of Leicester, in the County of Leicester. “IM-
PROVEMENTS IN MACHINERY AND APPARATUS APPLICABLE TO SPINNING FRAMES TO
PREVENT WASTE AND DOUBLE YARN."
My improved machinery and apparatus is applicable to frames employed in
spinning worsted, mohair, alpaca, botany, silk, cotton, and other fibres. Heretofore
the back or delivery roller in spinning frames has been a roller fluted in sections;
my improvements consist in providing tubular fluted sections, which revolve with
but are capable of revolving upon a shaft; each section is provided with a collar
secured on and revolving with the shaft; each collar is provided with a spring
catch, the projecting end of which takes into recesses in one end of a grooved
Rection; on the same end of the section a ratchet wheel is placed, having a stud
projecting from one side which takes into a recess in the circumference of the
section; the ratchet wheel is provided on its inside with inclines so arranged that
when a clawker engages in the teeth of the ratchet wheel the spring catch carried
by the collar is forced down by the inclines, and the ratchet wheel and grooved
section is prevented from revolving with the shaft. The clawker is balanced and
turns upon a pin or axis.secured to the framing; the clawker is also provided with
a swivelled centre adjustable on a rod, the outer end of which is hinged to one end
of a lever having its other end resting upon the thread to be spun; upon the thread
breaking, the clawker enters one of the teeth of the ratchet wheel and arrests the

page_text: set-screw having a circular groove in the centre of its length to receive a ring-
spring B' which presses upon two driving pins B* which lie in grooves cut in the
direction of the length of the collar; the ends of the driving pins project beyond
the collar and take into recesses in one end of the fluted sections A¹; the collar
spring and driving pins are shewn in section and end view respectively at Figures 4
and 5, and one end of each section is provided interiorly with inclines A³, the
inclined right end of the left section being shewn at Figure 6, and the inclined left
end of the right section at Figure 8; on the inclined ends of the sections a ratchet
wheel C is placed, provided with a stud C¹ on the inside which takes into a recess A¹
near the ends of the sections, shewn by dotted lines at Figures 6 and 8 and in side
view at Figure 11. Each ratchet wheel is also provided on its inside with inclines C³, .
seen at Figure 7, which shews the left side of the ratchet wheel to the left section,
and at Figure 10, which shews the right side of the ratchet wheel to the right
section. When a clawker D engages in the teeth of the ratchet wheel, the stud C₁
slides in the recess A² of the section, the inclines A³ of which then occupy the
relative position shewn at Figure 9 with respect to inclines C³ of the ratchet wheel,
the two sets of inclines seen at Figure 9 being the right side of the left section and
ratchet wheel; while in such position the driving pin rides over both sets of
inclines, during which the tubular fluted section remains stationary, while the shaft
or roller A and the remainder of the fluted sections A³ continue freely to revolve.
The clawker D is balanced by a weighted rod D¹ and carries an axle-pin which
rocks in the slotted ends of a forked bracket D2 secured to a cross bar or other
suitable part of the spinning machine. The clawker is also forked at its lower
end and slotted to form bearings for a swivelled centre E and set screw, by which
it can be adjusted on a rod E, the front end of which is hinged to the forked lower
end of a rocking lever F which turns on an axle secured in one of the forks of a
bearing bracket G, an underside view of which is seen at Figure 12, screwed to an
arm projecting from the front roller bar 3 of the spinning machine; the upper end
of the lever F carries a bent rod E², the front end of which is turned at a right angle
to its length and lies under the thread H which is being spun by the spindle to
which the above described apparatus is applied; while the thread holds the rod E
in the position shewn at Figures 1 and 3 by the black lines the clawker is held
quite clear of the ratchet wheel C, and the tubular fluted section A revolves with
the shaft A, continuing to draw the worsted from the roving spool and deliver it to
the back carrying rollers 8. But immediately the portion of thread which runs
between the wood lap board 6 and the front bottom roller 11 breaks or is drawn
asunder the weighted rod D¹ overbalances and lifts the front end of the clawker D
into the teeth of the ratchet wheel, which is prevented from revolving the inclines,
or which, as the tubular fluted section is carried round its driving pin, lifts the
driving pin clear of the recesses at the end of the section which thus remains
stationary, the driving pin riding over both sets of inclines until the thread is
pieced by the attendant and the wire E placed below it. While the fluted section
is stationary, the clawker D, weighted rod D¹, the centre E, rods E, E, and lever F
occupy the respective positions shewn by the dotted lines at Figure 3. Instead of
employing a weight capable of adjustment in a screw-threaded rod I secure the
weight to the upper end of the rod and bend the rod towards the front or back of
the spinning machine, that is to say, to the left or right, as seen at Figure 1, until
the weight requisite to effectually lift the clawker into the teeth of the ratchet
wheel when the thread breaks is attained, the weight balancing the levers and
wires so that the running thread holds the clawker down with little effort until
broken, then the weight overbalances, and increasing its leverage as it falls lifts the
clawker into the ratchet wheel.
Having thus fully described my said Invention and the manner of performing
the same, I wish it understood that I claim,-
First. The construction and employment of tubular fluted sectional lengths of
metal, each having inclines and a recess at one end, and arranged in pairs to assist
in forming the back bottom delivery roller of a spinning frame.

page_text: Second. The employment of loose collars on the axle to keep each pair of fluted
tubes the requisite distance apart.
Third. The combination of collar, ring-spring, and two driving pins, placed in
the centre of each pair of tubes, and secured to and revolving with the axle.
Fourth. The employment of two ratchet wheels, each provided with a pin and
inclines, and being recessed on one side to slide upon the inclined end of a fluted
tube.
Fifth. The combination of the balance weighted clawker and axle pin rocking in
the slotted bearings of a forked bracket, with a swivelled centre and set screw
adjustable on a rod having its front end hinged to the lower forked end of a lever
rocking in a bearing bracket, the lever carrying at its upper end a rod bent at a
right angle at its front end, the whole arranged and operating substantially as and
for the purpose described.
Sixth. The employment of the thread which is being spun to assist in holding
the clawker clear of the ratchet wheel, substantially as herein before described, and
illustrated in the Drawings annexed.
In witness whereof, I, the said Thomas Coltman, have hereunto set my
hand and seal, this Seventh day of August, in the year of our Lord One
thousand eight hundred and seventy nino.
Witness,
H. W. GOUGH, C.E.,
Nottingham,
THOMAS COLTMAN. (L.S.)