AN IMPROVED LOOM FOR WEAVING
Year: 1871

page_text: LETTERS PATENT to Alexander Melville Clark, of 53, Chancery
Lane, in the County of Middlesex, Patent Agent, for the Invention
of "AN IMPROVED LOOM FOR WEAVING.”—A communication from abroad
by James Short, of the City, County, and State of New York,
United States of America.
:
Sealed the 12th December 1871, and dated the 19th October 1871.
COMPLETE: SPECIFICATION filed by the said Alexander Melville Clark
at the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 19th October 1871, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
A
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
MELVILLE CLARK, of 53, Ohancery Lane, in the County of Middlesex,
Patent Agent, send greeting.
WHEREAS I am in possession of an Invention for "Ar IMPROVED
LOOM FOR WEAVING," and have petitioned Her Majesty to grant unto me,
my executors, administrators, and assigns, Her Royal Letters Patent
for the same, and have made solemn Declaration that it has been com-
municated to me from abroad by James Short, of the City, County, and
State of New York, United States of America.
NOW KNOW YE, that I, the said Alexander Melville Clark, do hereby
declare that the following Complete Specification, under my hand and

page_text: seal, fully describes and ascertains the nature of the said Invention,
and in what manner the same is to be performed, in and by the
following statement, reference being had to the two Sheets of Drawings
hereunto annexed, and to the letters and figures marked thercon (that is
to say):-
--
This Invention has for its object to improve the loom known as
"Lyall's positive motion loom" in so far as to enable the uso thereon
of two or more shuttles carrying threads of various colors and quality,
and permitting thereby the weaving on said loom of complex fabrics of
suitable pattern and colors.
5
1
The manufacture of the afore-mentioned positive motion loom and
which has been sufficiently explained and set forth in printed publica-
tions and in the Specification of a Patent granted to James Lyall, dated
March 26th, 1868, No. 1042, consists in securing the shuttle to a
carriage that is connected to an endless band or belt, the shuttle being 1
held to the carriage by its own weight only and thereby vertically
adjustable to pass over the lower threads of the shed.
This Invention consists chiefly in making the ends of the raceway
laterally adjustable, and in so duplicating the same that each section
will or may serve to retain a separate shuttle. By connecting these
movable raceway ends with proper gearing they can be shifted in due
succession so as to bring the shuttles successively into play. The
shuttle carrier according to this Invention is taken hold of by a pro-
jecting ear or lug on the band, which can be made to pass the carrier
at the end of a motion, permitting by a continued motion of said band
another shuttle and carrier to follow the first in the same direction.
Thereby, that is to say, by being enabled to move at any time any one
shuttle in suitable direction, I am enabled to execute every conceivable
design on this loom, while heretofore only one shuttle could be used on
the positive motion loom.
In the accompanying Drawings Figure 1 represents a front elevation
of the improved loom; Figure 2 is a vertical transverse section of the
same showing the gear which swings the raceway ends; Figure 3
is a detail face view of the cam mechanism for shifting the pinion in
the double segments that move the band; Figure 4 is a detail edge
view of the cranks that move said segments; Figure 5 is a detail vertical
transverse section of the cam and shifting mechanism above referred to.
Similar letters of reference indicate corresponding parts.

page_text: In this description I will only refer to the novel parts of the loom
of this Invention and not unnecessarily repeat by explaining the well
known devices and mechanism of the ordinary positive motion loom.
;
A in the Drawing is the main shaft of the loom hung in the frame B,
and receiving motion by intermediate gearing a, a, from the driving
shaft C; D is the raceway for the shuttle to move in. The ends E, E,
of the raceway are made detached from the main central part and are
secured to swinging frames F, F, whose position is regulated by inter-
mediate gearing b, b, from the crank shaft G which swings the lay J.
Each end E of the race way has two or more grooves or channels for
the shuttles to move in. Whichever of these grooves or channels is by
the afore-mentioned shifting gear brought in line with the main channel
of the raceway proper will constitute the end of the way in which the
shoot moves. H is the band moving the shuttle carrier I. On this
band are two or more projecting lugs c, c², for moving the shuttle carrier.
The latter has a recess in its under side for one of said lugs to enter, as
indicated in Figure 1. When the band has carried the shuttle to one
end of the loom it may be made to continue its motion in the same
direction withdrawing the actuating lug c from the carrier and bringing
by means of the other lug c³ another carrier and shuttle in the same
direction as the one last arrested, which meanwhile by the adjustment
of the race way end is carried out of line of the main raceway and the
channel in E being brought in line for the passage of the other carrier.
The band wheel d which moves the band H is mounted upon a shaft e,
which by gearing f receives motion from another transverse shaft g.
The latter carries an adjustable pinion h, which is held by a clutch i in
gear with one of two toothed segments j and k. The clutch i is actuated
by a cam on a shaft m that is rotated by gearing n from the main
shaft. When the cam swings the clutch the pinion will be brought
in gear with one or the other of the two segments, and thereby according
to the direction in which the latter are vibrated the motion of the band.
wheel is continued or reversed as may be desired. Thus the important
feat of continuing the motion of the band so as to move two shuttles
successively in the same direction can be effected. The segments j and k
5 are vibrated in continuous full strokes by means of arms o, o, which are
pivoted to cranks p, p, on a shaft q that is moved by bevel gearing from
the main shaft A.
"
'
The Invention will from the foregoing be easily understood. There are

page_text: from which the shuttle is to be taken is moved by the gearing b in line
with the main raceway. The design is regulated by the arrangement
of gearing and cam 7.
Having described the nature of the Invention, and the manner of
performing the same, I declare that what I claim as the Invention and
desire to secure by Letters Patent is,―
1st. The movable end sections of the raceway when provided with
several channels or grooves, as set forth.
2ndly. A loom having one raceway with a number of movable end
sections thereto to admit of several shuttles, as set forth.
3rdly. Moving the band of a positive motion loom in such continuity
as to convey two or more shuttles in the same direction one after tho
other, as specified.
4thly. The lugs c, c³, applied to the band H to move the shuttlo.
carriers I, substantially as hercin shown and described.
5thly. The shuttle carrier made with a recess in the under side for the
insertion and removal of the actuating lugs as specified.
6thly. The double segments j, k, arranged as set forth.
7thly. The sliding pinion h arranged in combination with the double
segments j, k, and band wheel d, as specified.
Sthly. The cam / arranged on the shaft m for actuating the clutch i
and pinion h, as set forth.
In witness whereof, I, the said Alexander Melville Clark, have
hereunto set my hand and seal, this Nineteenth day of October,
in the year of our Lord One thousand eight hundred and seventy- 2
one.
Witness,
JAS. O. DEWEY,
53, Chancery Lane,
London.
A. M. CLARK. (L.S.)