IMPROVEMENTS IN THE . CON- STRUCTION OF SELF-ACTING MULES FOR SPINNING
Year: 1877

page_text: LETTERS PATENT to John Carr and Thomas Waring, both of Darwen, in the
County of Lancaster, for the Invention of "IMPROVEMENTS IN THE . CON-
STRUCTION OF SELF-ACTING MULES FOR SPINNING."
Sealed the 18th April 1878, and dated the 22nd October 1877.
PROVISIONAL SPECIFICATION left by the said John Carr and Thomas
Waring at the Office of the Commissioners of Patents on the 22nd October
1877.
JOHN CARR and THOMAS WARING, both of Darwen, in the County of Lancaster.
"IMPROVEMENTS IN THE CONSTRUCTION OF SELF-ACTING MULES FOR SPINNING."
This Invention relates to the construction of an arrangement of mechanism for
tightening or "taking up the slack of the "backing off "chain used in self-acting
mules.
We attach a chain to the "backing off snail" and carry the same along, and fix
the other end by a screw bolt to a small cam or excentric mounted on a stud
fixed in a bracket attached to the framing. The cam or excentric is tapped with
screwed holes in various parts for the purpose of adjusting the chain.
Attached to this cam or excentric (or cast in one piece with it) is a small pulley
to which is attached one end of a second chain passing over a carrier pulley,
and connected at its other end direct to the "boot leg slide," which is attached to
the front of the carriage, and works in the copping rail. As this slide gradually
falls by the lowering of the copping rail at each "stretch" of the mule carriage,
the chain pulls the "backing off snail" further over, thus tightening or "taking up
the slack" of the "backing off chain."

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Carr and Thomas Waring in the Great Seal Patent Office
on the 20th April 1878.
JOHN CARR and THOMAS WARING, both of Darwen, in the County of Lancaster.
"IMPROVEMENTS IN THE CONSTRUCTION OF SELF-ACTING MULES FOR SPINNING."
This Invention relates to the construction of an arrangement of mechanism for
tightening or "taking up the slack" of the "backing off" chain used in self-acting
mules.
Such being the nature and object of my said Invention, we will now proceed to
describe in detail the manner in which the same is to be or may be performed or
carried into practical effect, and in order that the same may be clearly understood I
have annexed hereunto a Sheet of Drawings illustrative thereof, and have marked
the same with figures and letters of reference corresponding with those in the
following explanation thereof :-
Fig. 1 in the annexed Drawing is a plan view of part of the headstock and
carriage of a self-acting mule showing the application of our Invention thereto.
a, a, being part of the headstock, and b, b, part of the carriage. Fig. 2 is a side
view of part of the carriage and the copping rail c, c, and Fig. 3 is a side view of
the cam or excentric.
"
We attach a chain d, d, to the "backing off snail e, e, and carry the same along, and
fix the other end by a screw bolt to a small cam or excentric f, f, mounted on a stud
fixed in a bracket attached to the framing. The cam or excentric f, f, is tapped with
screwed holes in various parts for the purpose of adjusting the length of the
chain.
Attached to this cam or excentric f, f, (or cast in one piece with it) is a small
pulley g, g, to which is attached one end of a second chain h, h, passing over a
carrier pulley i, i, and connected at its other end direct to the "boot leg slide" k, k,
which is attached to the front of the carriage b, b, and works on the copping rail
C, C. As this slide k, l, gradually falls by the lowering of the copping rail c, c, at
cach "stretch" of the mule carriage b, b, the chain d, d, pulls the "backing off"
snail e, e, further over, thus tightening or taking up the slack of the backing off
chain.
Having now described the nature and object of our said Invention, together with
the manner in which the same is to be or may be performed or carried into practical
effect, we wish it to understood that we claim as our Invention, the combination of
the chain d, d, excentric f, f, small pulley g, g, and chain h, h, for connecting the
backing-off "snail" to the "boot leg slide," in the manner and for the purpose herein-
before more particularly set forth and described.
In witness whereof, I, the said Thomas Waring (on behalf of myself and
the said John Carr), have hereunto set my hand and seal, this Seventeenth
day of April, in the year of our Lord One thousand eight hundred and
seventy-eight.
THOMAS WARING. (L.S.)