IMPROVEMENTS IN MULES FOR SPINNING.”
Year: 1881

page_text: LETTERS PATENT to Benjamin Alfred Dobson, of the Firm of Messieurs
Dobson and Barlow, of Bolton, in the County of Lancaster, Machine Maker,
for an Invention of "IMPROVEMENTS IN MULES FOR SPINNING.”
PROVISIONAL SPECIFICATION left by the said Benjamin Alfred Dobson
at the Office of the Commissioners of Patents on the 5th December 1881.
BENJAMIN ALFRED DOBSON, of the Firm of Messieurs Dobson and Barlow, of
Bolton, in the County of Lancaster, Machine Maker. "IMPROVEMENTS IN MULES
FOR SPINNING."
In performing my Invention I dispense with the ordinary long lever for making
the changes for backing off and drawing up, and employ instead a rod extending
from one end to the other of the headstock frame; on this rod are two spiral
springs; one spring is retained by a collar near the end of the rod, and the other
spring bears against a bracket on the frame; the end of the backing off lever
through which the rod passes is between theso springs, and each spring bears
against it; the latch which retains this lever is released by the strap lever going
back, the outer spring having been previously tightened by the carriage, which in
running out carries forward the long rod, moves the lever, and puts the backing
off in gear. When the backing off is completed the faller locking motion releases
the rod, and the inner spring forces back the rod and the backing off lever, and
throws the backing off out of gear. One end of the lever for actuating the
drawing up motion is made to terminate outside the headstock near the long rod,
and an adjustable projection is connected to the rod to release the catch which
retains the drawing up lever, and allow the drawing up motion to be thrown into
gear. The drawing up cone lever is put out of gear by a stop on the carriage
square, and may be assisted in its motion, and is held out of gear by a stud on the
lever acted on by a cam on the cam shaft. The can shaft is placed for greater
convenience in front of the gearing of the headstock, and is driven direct by the

page_text: backing off cone spur; the changes are made by a rod with a finger at each end
acted on by the carriage square. The cam we employ by preference is the one
described in the Specification to Letters Patent granted to Benjamin Alfred Dobson,
William Dobson, and Robert Crompton Tonge on the 12th October A.D. 1878,
No. 4054.
The long rod may act as a safety motion. It is provided with a lever which will
come against the drawing up lever, and throw it out of gear when the rod is
turned partly round, and thus stop the mule during the run up. The rod may
also be turned to prevent the projection on it from releasing the latch which retains
the drawing up lever, and thus prevent the drawing up from being put into gear,
so that the mule will stop when the backing off is finished.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Benjamin Alfred Dobson in the Great Seal Patent Office on the
3rd June 1882.
18
BENJAMIN ALFRED DOBSON, of the Firm of Messieurs Dobson and Barlow, of
Bolton, in the County of Lancaster, Machine Maker. IMPROVEMENTS IN MULES
FOR SPINNING."
In performing my Invention I dispense with the ordinary long lever for making
the changes for backing-off and drawing up, and employ instead a rod extending
from one end to the other of the headstock frame; on this rod are two spiral
springs, one spring is retained by a collar near the end of the rod, and the other
spring bears against a bracket on the frame; the end of the backing-off lever through
which the rod passes is between these springs, and each spring bears against it;
the latch which retains this lever is released by the strap lever going back, the
outer spring having been previously tightened by the carriage, which in running
out carries forward the long rod, moves the lever, and puts the backing-off in gear.
When the backing off is completed the faller locking-motion releases the rod, and
the inner spring with the outer spring forces back the rod and the backing-off
lever, and throws the backing-off out of gear. One end of the lever for actuating
the drawing-up motion is made to terminate outside the headstock near the long
rod, and an adjustable projection is connected to the rod to release the catch which
retains the drawing up lever, and allow the drawing-up motion to be thrown into
gear; the drawing up cone lever is put out of gear by a stop on the carriage
square, and may be assisted in its motion, and is held out of gear by a stud on the
lever acted on by a cam on the cam shaft. The cam shaft is placed for greater
convenience in front of the gearing of the headstock, and is driven direct by the
backing-off cone spur; the changes are made by a rod with a finger at each end
acted on by the carriage square. The cam we employ by preference is the one
described in the Specification to Letters Patent granted to Benjamin Alfred Dobson,
William Dobson, and Robert Crompton Tonge on the Twelfth October, in the year
of our Lord One thousand eight hundred and seventy eight, No. 4054.
The long rod may act as a safety motion. It is provided with a lever which will
come against the drawing up lever and throw it out of gear when the rod is turned
partly round, and thus stop the mule during the run up. The rod may also be
turned to prevent the projection on it from releasing the latch which retains the
drawing-up lever, and thus prevent the drawing up from being put into gear, so
that the mule will stop when the backing off is finished.
And in order that my Invention may be fully understood and readily carried
into effect, I will describe the accompanying Sheet of Drawings, reference being
had to the figures and letters marked thereon.
Fig. 1 is an elevation and Fig. 2 is a plan of a mule headstock to which my
Invention is applied.
a is the rod extending from one end to the other of the beadstock frame; on
this rod are two spiral springs a¹, a²; the spring a¹ is retained by a collar near the
end of the rod, and the spring a bears against a bracket b on the frame. Tho end
of the backing-off lever c through which the rod passes is between these springs
which act upon it; the latch which retains the lover c is released by the strap
lever & when it passes on to the loose pulley. The spring a¹ having been previously
tightened by the carriage which in running out carries forward the long rod a by
moving the swing lever as to which the rod is attached. When the backing-off is
completed, the faller locking motion releases the rod a, and the spring a³ forces
back the rod a and the backing-off lever c, and throws the backing-off out of gear.

page_text: The lever for actuating the drawing-up motion is extended and carried down
outside the headstock near the long rod, and an adjustable tappet a' is connected
to the rod a to release the latch g which retains the drawing up lever f, and allow
the drawing-up motion to be thrown into gear. The drawing up cone lever fis
put out of gear by the carriage square which comes in contact with an adjustable
screw on the lever f, and may be assisted in its motion, and is held out of genr
by a stud f2 on the lever f, acted on by a cam on the cam shaft h. The cam
shaft h is placed for greater convenience in front of the gearing of the headstock,
and is driven direct by the backing-off cone spur; the changes are made by a rod
with a finger at each end acted on by the carriage square. The cam we employ by
preference is the one described in the Specification to Letters Patent granted to
Benjamin Alfred Dobson, William Dobson, and Robert Crompton Tonge on the
Twelfth October, in the year of our Lord One thousand eight hundred and seventy
eight, No. 4054, or we may use the cam shown on Figs. 4 and 5.
The long rod a may act as a safety motion. It is provided with a cam m which
lifts the lever k (see Figs. 3 and 3ª), when the fallers lock and allows the drawing-
up to go into gear; this cam will come against the drawing-up lever fand throw it
out of gear when the rod is turned partly round by the hand lever l, and thus stop
the mule during the run up. The rod may also be turned to prevent the projection
on it from releasing the lever k which retains the drawing up lever f, and thus
prevent the drawing up from being put into gear, so that the mule will stop when
the backing-off is finished.
Having stated the nature of my Invention, and described the manner of
performing the same,
I declare that I claim,
1. The combination with the rod a of the tappet a' acting on the latch g in the
manner and for the purpose shown and described.
2. The lengthened lever ƒ fitted outside the headstock, as and for the purpose
herein shown and described.
In witness whereof, I, the said Benjamin Alfred Dobson, have hereunto
set my hand and seal, this Second day of June, One thousand eight bundred
and eighty two.