IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1872

page_text: LETTERS PATENT to Alexander Melville Clark, of 53, Chancery Lane,
in the County of Middlesex, Patent Agent, for the Invention of
"IMPROVEMENTS IN LOOMS FOR WEAVING."-A communication from
abroad by Charles de Gonzenbach-Escher, Trading under the Name
PROVISIONAL SPECIFICATION left by the said Alexander Melville
Olark at the Office of the Commissioners of Patents, with his
Petition, on the 13th August 1872.
I, ALEXANDER MELVILLE CLARK, of 53, Chancery Lane, in the County
of Middlesex, Patent Agent, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN LOOMS FOR WEAVING," to be as follows:-
This Invention relates to looms for weaving with several shuttles, and
consists in improved means of making the shuttle box changes as
required, according to the pattern to be produced, either at each.or
at every alternate throw of the shuttle, the advantages resulting from

page_text: the improvements being greater speed and precision in the different
movements, with a saving in motive power.
This Invention is illustrated in the accompanying Drawing, in which
Figure 1 shows an end clevation of a loom, arranged according to this
Invention; Figure 2 a part front elevation; and Figure 3 a plan of same.
The reference letters apply to all three Figures.
g
A, framing of the loom; B, batten; C, shuttle box; D, rack support;
E, lifting lever; F, lever and rod for swinging back rack D; G, slotted
quadrants for raising and lowering intermediate lever E, provided with
claws which are operated by jacquard apparatus consisting of hooked
rods and a card cylinder carried in frame H; K, cam operating lever
arm I and card cylinder; O, shaft on which the principal parts arc
mounted. The frame H carrying the card cylinder is raised by cam K,
in which movement the card is changed on the cylinder, which raises
(wherever the card is not perforated) the corresponding rod h, this in
turn raises claw g, and the corresponding quadrant G remains stationary.
On the other hand if the hook of rod h enters a perforation in the
card the rod h remains unlifted and claw g is caught by part I which
oscillates the quadrant G on its centre O and raises lever E by means of
slot and with it the shuttle box C through its supports c. In order to
drop the shuttle box C to the desired position the part of quadrant G
abuts against F which throws back the rack D.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alexander Melville Clark in the Great Seal Patent
Office on the 12th February 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
MELVILLE CLARK, of 53, Chancery Lane, in the County of Middlesex,
Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of August, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Alexander Melville Clark, Her special
licence that I, the said Alexander Melville Clark, my executors, adminis-
2

page_text: trators, and assigns, or such others as I, the said Alexander Melville
Clark, my 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, usc,
3 exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for “Im-
PROVEMENTS IN LOOMS FOR WEAVING," a communication to me from abroad
by Charles de Gonzenbach-Escher, Trading under the Name of Escher,
Wyss, and Company, of Paris, France, upon the condition (amongst
others) that I, the said Alexander Melville Clark, my executors or admi-
nistrators, by an instrument in writing under my, or their, or one of
their hands and scals, 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 Scal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Alexander Melville Clark, do hercliy
declare the nature of the said Invention, and in what manner the samo is
to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the two accompanying
Sheets of Drawings, and to the letters and figures marked thereon (that
is to say) :-
This Invention relates to looms for weaving with several shuttles, and
consists in improved means of raising and dropping the shuttle box to
the position required according to the pattern to be produced, either at
cach or at every alternate throw of the shuttle, the advantages resulting
from the improvements being greater speed and precision in the different
movements with less motive power.
This Invention is illustrated in the accompanying Drawings, in which
Figure 1 shows an end elevation of a loom arranged according to this
Invention; Figure 2 a part front elevation; Figure 3 a plan; and Figure 4
a perspective view of the same. The reference letters apply to all the
Figures.
A, framing of the loom; B, batten; C, shuttle box; D, oscillating
rack support; E, lifting lever; F, lever; and F¹, rod for swinging back
rack D; G, slotted quadrant for raising and lowering intermediate
lever E, provided with claws g, which are operated by apparatus con-

page_text: sisting of hooked rods h and a card cylinder carried in frame H; K, cam
operating lever arm I and card cylinder W; O, shaft on which parts
E, G, I, are mounted. The loom may be provided with two, three, four,
or more shuttles, and each shuttle has a corresponding quadrant G, with
a slot, and a projecting part or cam x, the length of cach slot and the 5
prominence or radius of the cam x being determined with accuracy. To
each quadrant G is jointed a claw g, hung on a hooked rod h. The
frame H carrying card cylinder W is operated by the cam K. The
lever E is connected with quadrants G by a stud passing through all
the slots thereof, and is supported at its extremity in the steps of the 1
oscillating rack support D. The supporting rod c is fixed at one end V,
Figure 4, to lever E, and at the other to the shuttle box C. Rack D
is jointed to the lever F by a rod or link F'. When the frame H is raised
by cam K it changes the card on cylinder W, and that one of the hooked
rods which corresponds with a hole in said card remains unlifted while 1
the remaining rods are raised together with their claws g. The claw g
which remains down is caught by arm I, which is rocked and carrics
with it the corresponding quadrant G. The lever E is raised more or
less and supported on the first, second, or third step of support D,
according to which one of the several quadrants G is acted on by arm I, 2
and the shuttle box C is arranged in a corresponding degree by its support c
so that the first, second, or third shuttle may be brought into the work.
The part of the said quadrant G then acts on the lever F and rod F',
whereby the supprt D is swung back more or less so as to release lever E
therefrom and allow it to drop into a lower step of the support, the 2
shuttle box C being caused to partake in this downward motion through
the agency of its support c.

page_text: 3rdly. The application, substantially as shown and described, of an
intermediary F¹ between the lever F and the rack support D, whether
the pattern mechanism acts directly or indirectly on the claws or on the
lifting lever E.
In witness whereof, I, the said Alexander Melville Clark, have here-
unto set my hand and seal, this Twelfth day of February, in the
year of our Lord One thousand eight hundred and seventy-three.
A. M. CLARK. (L.S.)