IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS FOR WEAVING
Year: 1877

page_text: LETTERS PATENT to James Cowburn, of Radcliffe, in the County of Lancaster,
for the Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS FOR
WEAVING."
i
PROVISIONAL SPECIFICATION left by the said James Cowburn at the Office
of the Commissioners of Patents on the 14th June 1877.
JAMES. COWBURN, of Radcliffe, in the County of Lancaster.
IN THE CONSTRUCTION OF LOOMS FOR WEAVING."
"
:
IMPROVEMENTS,
This Invention relates to improvements upon what is known as "Diggle's drop-
box motion," which is employed in looms for weaving fancy goods, more particularly.
checks; stripes, and ginghams, for which Letters Patent were originally granted to.
Squire Diggle, dated 11th January, 1845, No. 10,462, the object of my Invention
being to dispense with the tappet chain, and to work the "drop boxes" from pattern,
cards only.
On the crank shaft of the loom I fix a spur pinion, gearing with a spur wheel, to
which is attached a rim and stud wheel working two or more star wheels, which:
are mounted loosely on a fixed axis, so as to be able to revolve and also to slide
sideways. Each star wheel has a cam or tappet connected with it, which cams.
have different lifts, and act upon the lifting bowl attached to the upper end of a
connecting rod; the lower end of which is hinged to one end of a lever; the other-
end of the latter being attached to the lifting rod which works the drop boxes."
The cylinder over which the pattern cards pass is worked from the tappet shaft
in the usual manner. The number of holes in each row of the pattern cards will
depend upon
the number of shuttle boxes, there being one hole and one sliding rod
or" dart" for each star wheel. On the end of each "dart" is an inclined plane.
acting against a forked lever, which embraces the boss of a star wheel.
Whenever there is a blank in the pattern card presented to any one of the
"darts." the corresponding "dart" is forced forward, and the incline on its end
throws the corresponding star wheel into gear with the rim and stud wheel, and at..
Price 6d1
:

page_text: the same time moves its respective cam or tappet into action with the lifting bowl,
thus bringing the required shuttle box and shuttle to the level of the shuttle race.
Each forked lever is provided with a spring for throwing the star wheels and
cains back into their original position as soon as their respective " darts Are
released.
"
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Cowburn in the Great Seal Patent Office on the 14th December
1877.
JAMES COWBURN, of Radcliffe, in the County of Lancaster. " IMPROVEMENTS IN
THE CONSTRUCTION OF LOOMS FOR WEAVING.'
This Invention relates to improvements upon what is known as "Diggle's drop-
box motion," which is employed in looms for weaving fancy goods, more particularly
checks, stripes, and ginghams, for which Letters Patent were originally granted to
Squire Diggle, dated January 11, 1845, No. 10,462, the object of my Invention
being to dispense with the tappet chain, and to work the "drop boxes" from pattern
cards only.
Such being the nature and object of my said Invention, I 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 under-
stood I have hereunto attached 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 represents in side elevation part of the end frame
of a drop-box loom, with my improvements shown as applied thereto; Fig. 2 is a
back view of the same; and Fig. 3, a plan view thereof.
On the crank shaft a, a, of the loom I fix a spur pinion b, b, gearing with a spur
wheel c, c, to which is attached a rim and stud wheol d, d, working two or more
star wheels 6, 6, which are mounted loosely on a fixed axis, so as to be able to
revolve and also to slide sideways. Each star wheel e, e, has a cam or tappet f, f,
connected with it, which cams have different lifts, and act upon the lifting bowl g,g,
attached to a lever h at the upper end of a connecting rod i, i, the lower end of
which is hinged to one end of a lever k, k, the other end of the latter-being attached
to the lifting rod 1, 4, which works the drop boxes.
I would here remark that although only two lifts are shown on the Drawing
more than that number may be obtained in the same manner if required.
The cylinder m, m, over which the pattern cards pass is worked from the tappet
shaft in the usual manner. The number of holos in each row of the pattern cards
will depend upon the number of shuttle boxes, there being one hole and one sliding
rod or " dart" n, n, for each star wheel.
Whenever there is a blank in the pattern card presented to any one of the "darts" 4
n, n, the corresponding " dart" is forced forward, and its incline o throws the cor-
responding star wheel into gear with the rim and stud wheel d, d, and at the same
time moves its respective cam or tappet ff, into action with the lifting bowl g,.
thus bringing the required shuttle box and shuttle to the level of the shuttle race.
Each forked lever is provided with a spring q, q, for throwing the star wheels 4
back into their original position as soon as their respective darts are released.

page_text: Having now described the nature and object of my said Invention, together with
the manner in which the same is to be or may be performed or carried into practical
effect, I wish it understood that I claim as my Invention, the construction and appli-
cation to fancy looms of the arrangement of mechanism herein-before described and
illustrated by the Drawings annexed, or any mere modification thereof, for the
purpose of dispensing with the tappet chain, and working the drop boxes from
pattern cards only.
In witness whereof, I, the said James Cowburn, have hereunto set my hand
and seal, this Twelfth day of December, in the year of our Lord One
thousand eight hundred and seventy-seven.
JAMES COWBURN. (LS.)