AN IMPROVEMENT IN THE CONSTRUCTION OF SELF-ACTING CONUCTION OF-ACTING MULES FOR SPINNING AND DOUBLING COTTON
Year: 1871

page_text: LETTERS PATENT to George Harrison, Henry Harrison, and William
Harrison, all of Burnley, in the County of Lancaster, for the
Invention of "AN IMPROVEMENT IN THE CONSTRUCTION OF SELF-ACTING
Scaled the 26th September 1871, and dated the 27th April 1871.
PROVISIONAL SPECIFICATION left by the said George Harrison,
Henry Harrison, and William Harrison at the Office of the
Commissioners of Patents, with their Petition, on the 27th April
1871.
We, GEORGE HARRISON, HENRY HARRISON, and WILLIAM HARRISON,
all of Burnley, in the County of Lancaster, do hereby declare the
nature of the said Invention for "AN IMPROVEMENT IN THE CONSTRUCTION
OF SELF-ACTING MULES FOR SPINNING AND DOUBLING COTTON," to be as
follows:-
"
The object of this Invention is to prevent the "snarling of the
weft which is frequently caused in self-acting mules by the slackness

page_text: (at starting) of the band which actuates the going out and running
in of the spindle carriage. This object we propose to effect by forming
or fixing a "swell " upon the back or delivery scroll, (round which
the said band passes) in such a position that it shall tighten the said
band at starting, so that the spindle carriage is started instantaneously,
and with a tight band, and thus the occurrence of "snarls" in the
weft is effectually prevented.
We are aware that "swells" have been tried with a view of preventing
the "snarls," but they have always hitherto been applied to the front
or drawing scroll, and hence they have not had the desired effect. Our
Invention therefore consists in applying the said "swells" to the back
or delivery scroll (either instead of or in addition to those on the front
scroll), by which novel use and application of the "swells" the snarls
are prevented, and a very great improvement and economy in the
spinning or doubling of the yarn is effected.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Harrison, George Harrison, and William
Harrison in the Great Seal Patent Office on the 27th October
1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, GEORGE
HARRISON, HENRY. HARRISON, and WILLIAM HARRISON, all of Burnley,
in the County of Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of April, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fourth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said George Harrison, Henry
Harrison, and William Harrison, Her special license that we, the said
George Harrison, Henry Harrison, and William Harrison, our executors,
administrators, and assigns, or such others as we, the said George
Harrison, Henry Harrison, and William Harrison, our exccutors, admi-
nistrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,

page_text: within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "AN IMPROVEMENT IN THE
CONSTRUCTION OF SELF-ACTING MULES FOR SPINNING AND DOUBLING COTTON," upon
the condition (amongst others) that we, the said George Harrison,
Henry Harrison, and William Harrison, our executors or administrators,
by an instrument in writing under our, or one of our or their, or one
of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said William Harrison (on behalf of
myself and the said George Harrison and Henry Harrison), do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement and accompanying Drawings (that
is to say):
"
==
The object of this Invention is to prevent the "snarling" of the
weft which is frequently caused in self-acting mules by the slackness
of the band which actuates the going out and running in of the
spindle carriage. This object we propose to effect by-forming or fixing
a swell" upon the back or delivery scroll (round which the said
band passes) in such a position that it shall tighten the said band
before starting, so that the spindle carriage is started instantaneously
and with a tight band, and thus the occurrence of "snarls" in the weft
is effectually prevented.
We are aware that "swells" have been tried with a view of preventing
the "snarls," but they have always hitherto been applied to the front
or drawing scroll, and hence they have not had the desired effect. Our
Invention therefore consists in applying the said "swells" to the back
or delivery scroll (either instead of or in addition to those on the front
scroll) by which novel use and application of the "swells" the snarls
are prevented, and a very great improvement and economy in the
spinning or doubling of the yarn is effected.
Such being the nature and object of our said Invention for "An
Improvement in the Construction of Self-acting Mules for Spinning
and Doubling Cotton," we will now proceed to describe more in detail
the manner in which the same is to be or may be carried into practical

page_text: .
effect, and in order that the same may be clearly understood we 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, and Fig. 2 an elevation
of so much of a self-acting mule as is necessary to illustrate the practical
application of our Invention.
a, a, is part of the headstock framing; and b, b, part of the spindle
carriage; c, c, is the scroll shaft; d, d, the back or delivery scroll;
and ff, is the front or drawing scroll, with its respective band 9, 9;
h, h, is the swell which is fixed to or formed with the back or delivery
scroll, and which draws the band e, e, quite tight just before the starting
out of the carriage. The form of this swell is seen better at the
enlarged views Fig. 3, and the effect of the swell is shown clearly at
Figs. 1 and 2, where the Drawing shows the position of the swell just
as the carriage is starting out, and when the band is at its tightest
position.
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 would remark in con-
clusion that we claim as our Invention the use or application of a
swell to the back or delivery scroll of self-acting mules substantially
in the manner and for the purpose herein-before more particularly set
forth.
In witness whereof, I, the said William Harrison, on behalf of
myself and the said George Harrison and Henry Harrison, have
hereunto set my hand and seal, this Twenty-fifth day of October,
in the year of our Lord One thousand eight hundred and seventy-
ANA
Witnessed by
GEORGE DAVIES, C.E.,
Patent Agent,
Manchester.
WILLIAM HARRISON. (L.S.)