IMPROVE- CANAMAWATION OR CRANK ARMS USED IN LOOMS FOR WEAVING. MENTS IN THE CONSTRUCTION OP CRANK ÅRMS USED IN LOOMS FOR WEAVING.
Year: 1875

page_text: LETTERS PATENT to James Booth and John Banks, both of Oswald-
twistle, in the County of Lancaster, for the Invention of “IMPROVE-
CANAMAWATION OR CRANK ARMS USED IN LOOMS FOR WEAVING.
MENTS IN THE CONSTRUCTION OP CRANK ÅRMS USED IN
LOOMS FOR WEAVING.

page_text: at or near the centre, brasses or bearing pieces being provided at each
end. The strap is made with slots at or near the centre through which
a cotter is driven, passing between the two blocks and forcing them out-
wards against the crank pin and stud.
One of the blocks or filling pieces is provided with a lug through
which is tapped a screw, the end of which bears against the side of the
. cotter, and prevents it from working loose.
Crank arms constructed according to our Invention will be found
much more durable and less liable to fracture than crank arms made in
the usual manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Booth and John Banks in the Great Seal
Patent Office on the 4th November 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
BOOTH and John Banks, both of Oswaldtwistle, in the County of Lan-
caster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of May, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said James Booth and John
Banks, Her special license that we, the said James Booth and John
Banks, our executors, administrators, and assigns, or such others as we,
the said James Booth and John Banks, 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 "IMPROVEMENTS IN THE CONSTRUCTION OF
CRANK ARMS USED IN LOOMS FOR WEAVING," upon the condition (amongst
others) that we, the said James Booth and John Banks, our executors
or administrators, by an instrument in writing under our, or one of our,
or their, or one of their hands and seals, should particularly describe and

page_text: 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 imme-
diately after the date of the said Letters Patent :-
:-
NOW KNOW YE, that I, the said John Banks (on behalf of myself
and the said James Booth), do hereby declare the nature of the said
Invention, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following state-
ment and accompanying Drawings.
This Invention relates to the construction of crank arms (used in
looms for weaving) for connecting and imparting the motion of the
crank to the lathe or slay.
Such being the nature and object of our said Invention we 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 we 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 expla
nation thereof :—
Fig. 1 in the annexed Drawing is a side elevation of a crank arm
constructed according to our Invention; Fig. 2 is a plan or horizontal
view of the same as seen from above; and Fig. 3 shows similar views of.
detached portions of the same.
The improved crank arm consists principally of an external endless
strap of metal a, a, enclosing two blocks or filling pieces b, b, and c, c,
which nearly meet at or near the centre brasses or bearing pieces d, d,
being provided at each end. The strap a, a, is made with slots e, e, at
or near the centre, and the filling picces b, c, are made with corre-
sponding notches (see Fig. 3) through which the cotter f, f, is driven;
passing between the two blocks b and c, and forcing them outwards
against the crank pin 9, 9, and the stud h, h, which connects the crank
arm to the slay sword.
One of the blocks or filling pieces c, c, is provided with a lug i, i,
through which is tapped a set screw k, k, the end of which bears
against the side of the cotter f, f, and prevents it from working
loose.

page_text: Crank arms constructed according to our Invention will be found
much more durable and less liable to fracture than crank arms made in
the usual manner.
Having now described the nature and object of our said Invention,
together with the manner in which the same is to be or may be per-
formed or carried into practical effect, we wish it to be understood
that we claim as our Invention, the construction of crank arms for
power looms, substantially as herein-before described and illustrated by
the Drawing annexed.
In witness whereof, I, the said John Banks (on behalf of myself
and the said James Booth) have hereunto set my hand and scal,
this Second day of November, in the year of our Lord One
thousand eight hundred and seventy-five.