CERTAIN IM- PROVEMENTS IN LOOMS FOR WEAVING
Year: 1865

page_text: LETTERS PATENT to Joseph John Harrison, of Broughton, in the County
of Lancaster, Civil Engineer, and Edward Harrison, of Balham Hill, in
the County of Surrey, Gentleman, for the Invention of "CERTAIN IM-
PROVEMENTS IN LOOMS FOR WEAVING."
PROVISIONAL SPECIFICATION left by the said Joseph John Harrison and
Edward Harrison at the Office of the Commissioners of Patents, with
their Petition, on the 29th December 1865.
We, JOSEPH JOHN HARRISON, of Broughton, in the County of Lancaster,
Civil Engineer, and EDWARD HARRISON, of Balham Hill, in the County of
Surrey, Gentleman, do hereby declare the nature of the said Invention for
"CERTAIN IMPROVEMENTS IN LOOMS FOR WEAVING," to be as follows:-
The first part of our Invention relates to that portion of the loom called the
"check motion," and is designed for the purpose of gradually retarding the
shuttle when entering the shuttle box, and finally stopping and retaining the
same until again expelled, at which time the shuttle is released and left free
to "pick." This part of our Invention may be thus described:-Immediately
behind each shuttle box' a vertical rod is placed, which is secured to and
projects from the ordinary "stop rod" of the loom and is employed for the
purpose of supporting a horizontal eccentric disc or segment which is allowed
freely to turn thereupon, the periphery of which may be plain or covered with
leather, caoutclioue, or other similar material;. this diso is allowed freely to

page_text: work through an aperture formed in the back board of the shuttle box, the
amount of its inward or angular motion being governed by pins projecting
therefrom, which when brought into contact with such back board or other
impediment prevents or checks its further movement. The position of the
disc when not in action is arranged so as slightly to protrude through the
said aperture, in order that the forward action of the shuttle when entering
the box shall catch or rub against its periphery, the frictional contact of
which causing it partially to turn effects a gradually increasing pressure upon
the shuttle until it becomes finally stopped and retained. The reverse action
of such eccentric disc when the shuttle is leaving the box instantly releases
or reduces the pressure upon such shuttle, which thereby effects a considerable
saving of power and greater accuracy of movement to the shuttle when
"picking." The pressure exerted by the disc upon the shuttle may be regulated
as desired by a spring or weighted lever connected thereto and attached to
the "stop rod" of the loom.
The second part of our Invention is designed for the purpose of stopping the
loom in the event of the shuttle floating or not entering the shuttle box,
and consists in attaching to the spindle of the eccentric disc herein-before
described a finger which, when the shuttle "floats" and the eccentric disc
remains undisturbed, forces or actuates the catch upon the "stop rod" in such
a manner that it shall, with the forward action of the "slay," come into con-
tact with the "frog," thereby stopping the loom in the ordinary manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph John Harrison and Edward Harrison in the Great
Seal Patent Office on the 7th June 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOSEPHI
JOHN HARRISON, of Broughton, in the County of Lancaster, Civil Engineer, and
EDWARD HARRISON, of Balbam Hill, in the County of Surrey, Gentleman, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of December, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-ninth year of ller reign,
did, for Herself, Her heirs and successors, give and grant unto us, the said Joseph
John Harrison and Edward Harrison, Her special license that we, the said
Joseph John Harrison and Edward Harrison, our executors, administrators, and
assigns, or such others as we, the said Joseph John Harrison and Edward

page_text: Harrison, our executors, administrators, 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, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "CERTAIN IMPROVEMENTS IN LOOMS
FOR WEAVING," upon the condition (amongst others) that we, the said Joseph
John Harrison and Edward Harrison, our executors or administrators, by an
instrument in writing under 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 we, the said Joseph John Harrison and Edward
Ilarrison, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement and accompanying Drawings, that
is to say:
The first part of our Invention relates to that portion of the loom called
the "check motion," and is designed for the purpose of gradually retarding
the shuttle when entering. the shuttle box, and finally stopping and retaining
the same until again expelled, at which time the shuttle is released and left
free to "pick." This part of our Invention may be thus described :-Imme-
diately behind each shuttle box of the loom a vertical rod is placed, which is
secured to and projects from the ordinary stop rod of the loom and is em-
ployed for the purpose of supporting a horizontal eccentric segment or circular
disc which is allowed freely to turn thereupon, the periphery of which may
be plain or covered with leather, caoutchouc, or other similar material; this
disc is allowed freely to work through an aperture formed in the back board
of the shuttle box, the amount of its inward or angular motion being governed
by pins projecting therefrom, which when brought into contact with such
back board or other impediment prevents or checks its further movement.
The position of the disc when not in action is arranged so as slightly to pro-
trude through the said aperture in order that the forward action of the shuttle
when entering the box shall catch or rub against its periphery, the frictional
contact of which causing it partially to turn effects a gradually increasing
pressure upon the shuttle until it becomes fiually stopped and retained. The
reverse action of such eccentric disc when the shuttle is leaving the box
instantly releases or reduces the pressure upon such shuttle, which thereby
effects a considerable saving of power and greater accuracy of movement to

page_text: the shuttle when picking, The pressure exerted by the disc upon the shuttle
may be regulated as desired by a spring or weighted lever connected thereto
and attached to the stop rod of the loom.
The second part of our Invention is designed for the purpose of stopping
the loom in the event of the shuttle "floating" or not entering the shuttle box,
and consists in attaching to the spindle of the eccentric or disc herein-before
described a finger which, when the shuttle "floats" and the eccentric diso
remains undisturbed, forces or actuates the catch upon the stop rod in such a
manner that it shall, with the forward action of the "slay," come into contact
with the "frog," thereby stopping the loom in the ordinary manner.
In order that the Invention may be better understood and explained in
detail, we have hereunto attached a Sheet of Drawings made about full size,
and having similar letters of reference marked thereupon.
Fig. 1 represents a back view of the shuttle box of a loom, shewing the
position of the rod supporting the revolving eccentric swell, and also its con-
nection with the "stop rod;" Fig. 2 represents a plan view of the same;
Fig. 8 represents an end elevational view of the box, shewing more particu-
Jarly the arrangement of the lever actuating the "frog" when the shuttle
"floats" or does not enter the box; and Fig. 4 represents another modifica-
tion of "swell," having an eccentric formation in Figs. 1, 2, and 3.
a, a, is an end portion of the "slay" of a loom, upon which the shuttle box
is formed; is the back board of such box, in which an aperture is formed
for the purpose of receiving the disc or "eccentric swell" c; this "swell" is
supported and turns freely. on the finger d, which is attached to the stop rode
of the loom; the spring r (one end of which is attached to the stop rod and
the other to the "slay swort") causes the swell c when at rest slightly to pro-
trude through the aforesaid aperture in the back board. The action of the
improved "swell" from the foregoing lettered description may be thus
described: Upon the shuttle entering the box its frictional contact with the
protruding swell cause such "swell" by its eccentric formation to turn and exert
an increasing pressure upon the shuttle until it is finally checked and brought to
a stand, but immediately the slightest outward action is bought to bear upon
the shuttle by the "picker" the eccentric "swell" with such reverse uction
instantly releaves the shuttle from pressure, thereby reducing the strength of
pick required, and also causing a less wear and tear to the shuttles employed.
The pressure of the shuttle against the swell on entering the box forces
back the finger & secured to the stop rode, which has the effect of raising the
lever (seen in Fig. 3), so as to prevent it coming into contact with the
frog 9, which would otherwise stop the loom.

page_text: Having now described the nature of our said Invention, together with the
method of carrying it into practical effect, we wish it to be distinctly under-
stood that we claim,―
First, the novel arrangement, construction, employment, and use of the
revolving or reciprocating "swell" in direct connection with the stop rod of
the loom, as herein-before described and set forth, or any slight modification
of the same, as employed for the purpose as herein-before described.
And, secondly, we claim the employment and use of the lever attached to the
stop rod of the loom actuating the frog, as herein-before described, in order
to prevent the further action of the loom should the shuttle "float" or not
enter the box.
In witness whereof we have hereunto set hands and seals, this Twenty-
ninth day of May, in the year of our Lord One thousand eight hundred
and sixty-six.
JOSEPH JOHN HARRISON. (L.s.)
EDWARD HARRISON.
(L.S..)