IMPROVEMENTS IN THE CONSTRUCTION OF CRANK ARMS USED IN LOOMS FOR WEAVING
Year: 1876

page_text: LETTERS PATENT to Denis Bury, of Oswaldtwistle, in the County of Lancaster,
"
for the Invention of IMPROVEMENTS IN THE CONSTRUCTION OF CRANK ARMS
USED IN LOOMS FOR WEAVING."
Sealed the 19th December 1876, and dated the 15th September 1876.
PROVISIONAL SPECIFICATION left by the said Denis Bury at the Office of
the Commissioners of Patents on the 15th September 1876.
DENIS BURY, of Oswaldtwistle, in the County of Lancaster.
THE CONSTRUCTION OF CRANK ARMS USED IN LOOMS FOR WEAVING."
"IMPROVEMENTS IN
This Invention relates to the construction of the crank arms used in looms for
weaving for connecting lathe or slay to the crank, the object of the Invention being
to combination great solidity and strength with simplicity of construction, and to
dispense with the use of the straps heretofore employed.
In constructing my improved crank arm I form a solid connecting rod with a
double head all in one piece. In each head there is a slot or transverse opening
semicircular at the top or outer end, so as to form half of the bearing for the crank
or pin, and square or rectangular at the bottom or inner end to receive a block.
This block is formed rectangular to fit in the slot and has a semicircular notch to
form the other half of the bearing for the crank or pin. The block is set up" to
the crank or pin when required by means of a cottar or key passing through a slot
or key groove at right angles to the axis of the crank or pin, and this cottar or key
is held in its place by means of a set screw tapped into the head of the crank arm
and pinching the side of the cottar or key.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Denis Bury in the Great Seal Patent Office on the 14th March
1877.
DENIS BURY, of Oswaldtwistle, in the County of Lancaster.
"IMPROVEMENTS IN
THE CONSTRUCTION OF CRANK ARMS USED IN LOOMS FOR WEAVING."

page_text: This Invention relates to the construction of the crank arms used in looms for
weaving for connecting the lathe or slay to the crank, the object of the Invention
being to combine great solidity and strength with simplicity of construction, and to
dispense with the use of the loose straps heretofore employed.
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 understood,
I 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 face view, and Fig. 2 an edge view of a crank
arm made according to my Invention, and finished ready to be attached to the loom;
Figs. 3, 4, and 5, are detached portions thereof.
Figs. 6 and 7 are face and edge views of a different pattern or slight modification
of the same.
In constructing my improved crank arm I form a solid connecting rod a, a, with
a double head cast all in one piece, as shown at Fig. 3. In each head there is a slot
or transverse opening b, bx, semicircular at the top or outer end so as to form half
of the bearing for the crank or pin, and square or rectangular at the bottom or
inner end to receive a block, the opening 6 being sufficiently large to pass over the
cranked part of the loom shaft. The blocks c, cx, are formed rectangular to fit in
the slots, and have each a semicircular notch d, dx, to form the other half of the
bearing for the crank or pin. The blocks are "set up" to the crank or pin when
required by means of cottars or keys e, e, passing through slots or key grooves at
right angles to the axis of the crank or pin, and these cottars or keys are held in
their place by means of set screws f, f, tapped into the head of the crank arm and
punching the side of the cottars or keys.
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 to be understood that I claim as my Invention the novel con-
struction of crank arms used in looms for weaving by casting the arm a, a, with
two slotted heads b, bx, all in one piece in combination with notched filling
blocks c, c, constructed and applied substantially as herein-before described and
illustrated by the Drawings annexed.
In witness whereof, I, the said Denis Bury, have hereunto set my hand and
seal, this Thirteenth day of March, in the year of our Lord One thousand
eight hundred and seventy-seven.
DENIS BURY. (L.S.)