Improvements in Crank Arms of Looms for Weaving.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in Crank Arms of Looms for Weaving.
We JOHN HENRY BURY of Vulcan Iron Works, Moor End Oswaldtwistle, in
the County of Lancaster, Engineer, and JAMES BOOTH of 60 Roegreave Road
Oswaldtwistle aforesaid, Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in the crank arms of looms for weaving,
and the object is to construct crank arms which are more durable, effective, and
readily adjusted than heretofore, and consists in making the strap of the arms in one
piece, and the block in two pieces, each piece or block being forced apart by gib
pins, or keys, and an inclined cotter pin as ordinary, and by means of which the
whole depth of the blocks are in contact with, and form wearing surfaces for the
gib pins.
The
According to this our invention the strap of the crank arm is formed in one
piece, and in this strap, are formed and carried two blocks, one end of each block
having formed in it a half portion of the eyes, or holes at each end of the crank
arm, and through which the crank shaft, and pin works respectively.
other end of each of these blocks is cast with a projection on one side, so
that when in position they form a slot corresponding with the slots in the strap, in
which slot are received two gib pins, the outer ends of which, enclose or grip the
outer sides of the strap, and the inner surfaces bear against the faces of the
projections, cast on the blocks.
Between the two gib pins is placed a cotter pin having a longitudinal slot formed
in it, and through the two projections on the ends of the blocks are formed slots or
eyes, through which, and through the slot in the cotter pin, we pass a bolt, secured
by a nut.
When it is necessary to tighten up the arm by making the eyes or holes at each
end less, the nut is loosened on the bolt, and the cotter pin which is formed with
inclined faces as ordinary, is forced further between the gib pins, thus forcing the
blocks further apart, and their halves of the eyes or holes, nearer to the corre-
sponding halves, or holes fixed at each end of the strap; and thus the several
parts are tightened, or adjusted as much as necessary whereon the nut is then
screwed on the bolt, and the arm is ready for working.
ad of Nov 1901
BRIERLEY & HOWARD,
Penny Bank Chambers, Halifax, Agents for the Applicants.

page_text: Improvements in Crank Arms of Looms for Weaving.
We, JOHN HENRY BURY of Vulcan Iron Works, Moor End, Engineer, and
JAMES BOOTH, of 60 Roegrave Road, Manufacturer, both of Oswaldtwistle in the
County of Lancaster do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention relates to improvements in the manufacture of crank arms of
looms for weaving the object being to construct such crank arms as to be more
durable, effective, and readily adjusted than heretofore, the strap of the arm being
made in one piece, and the blocks in two pieces, each piece or block being forced
apart by gib pins, or keys, and an inclined cotter pin as ordinary, and by means of
which the whole depth of the blocks, are in contact with, and form wearing surfaces
for the gib pins.
When it is necessary to tighten up the arm by making the eyes, or holes at each
end less, it can be done readily by loosening a nut on a bolt, and the cotter pin,
which is formed with inclined faces as ordinary, is forced further between the gib
pius, thus forcing the blocks further apart, and their halves of the eyes or holes,
nearer to the corresponding halves, or holes fixed at each end of the strap; and
thus the several parts are tightened, or adjusted, as much as necessary, whereon
the nut is again screwed upon the bolt, and the arm is ready for working.
Such being the nature and object of our said invention the following is a complete
description of same, reference being made to the accompanying drawings forming
a part of this Specification in which:
Fig. 1 is a side elevation of one of the improved crank arins.
Fig. 2 is a plan view of Fig. 1.
The several figs. on Sheet 2 are details drawn separately in order to shew their
construction more clearly.
Crank arms constructed according to this our said invention consist of the strap 1
in which strap are received and carried the two blocks 2, 3 free to slide, (when
the cotter pin is removed) in the said strap 1.
"
One end of the smaller block 3 has a semicircular recess, 4 which forms a half
portion of the " 'eye' or hole through which the crank pin 6 is received and
works, and at one end of the larger block 2 we also form a semicircular recess 7
which holds, and presses against one half, or segment of a brass collar or bush 8
through which the crank shaft 9 of the loom works.
The inner ends of the blocks 2. 3 have projections 10. 10 formed or cast to them
and slots 11. 11 are formed in the strap 1. These slots 11. 11 receive the gib
pins 12. 12. the ends 13. 13 of which overlap, and grip the outer portions of the
strap 1, and thereby hold the several parts in position. Between the gib pins 12. 12
is placed a wedge shaped cotter pin 14 having a longitudinal slot 15 formed in
it. A nut and bolt 16 secure the cotter pin in position by the bolt passing through
the slot 15 and through the slots 11° 11° formed in the projections 10. 10.
The blocks 2. 3. are prevented from moving sideways, or laterally in the strap 1
by the projections 10. 10, being bolted together by the bolt 16
The improved crank arm is manipulated as follows:-When, say, it is necessary
to tighten up the arm by making the holes or eyes, 5. 20 less in diameter; the nut
is loosened on the bolt and the wedged shaped cotter pin 14 knocked or pushed
further down, and so forcing apart the gib pins 12. 12 and blocks 2. 3 and the
recesses, 4. 7 are thereby brought nearer to the corresponding recesses which go to
make up the complete hole or "eye"; the nut is then tightened on the bolt, and
the whole of the parts are fixed in position, and the arm is ready for working.
To make the holes, or "eyes" of larger diameters the wedge shaped cotter pin is

page_text: partly withdrawn, and the several parts moved in an opposite direction to that
above described.
Having now particularly described and ascertained the nature and object of
our said invention, and in what manner the same is to be employed, we declare that
what we claim is :-
(1.) The general construction, combination, and arrangement of parts constituting
our improved crank arm, as and for the purpose herein set forth and substantially
as illustrated by the annexed drawings.
(2.) The strap blocks 23 with projections 10. 10 gib pins 12. 12 wedge shaped
cotter pins 14 with longitudinal slot 15 and bolt 16 all in combination as and for
the purpose herein described and substantially as illustrated by the annexed
drawings.
Dated this 27th dov of Fehru 100K
JOHN HENRY BURY,
JAMES BOOTH,
By their Agents, Brierley & Howard,
Penny Bank Chambers, Halifax.