Improvements connected with the Crank Shaft Arms of Looms for Weaving.
Year: 1894

page_text: Date of Application, 3rd Sept., 1894
Complete Specification Left, 15th May, 1895-Accepted, 15th June, 1895
PROVISIONAL SPECIFICATION.
Improvements connected with the Crank Shaft Arms of Looms for
Weaving.
I, JOHN SEED, of 7, Mill Street, Farington, near Preston, in the County of
Lancaster, Mechanical Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention has for its object to provide an improved means of taking up
the slack in the bearings at each end of the crank shaft arm of a loom. Heretofore
this has usually been effected by means of double gib and taper cotter mechanism
which causes the two straps-enclosing the steps-to be drawn towards each other
and so to simultaneously tighten up each of the said end bearings. By my
invention the gib and cotter mechanism is dispensed with as also the side set screw
for fastening the cotter in position and separate patterns for right and left hand
crank shaft arms are no longer required. Moreover in my arrangement the end
bearings may be tightened separately or independently of each other.
In carrying out my invention I make the end bearings or steps of the usual
form and the block or body part of the crank shaft arm with parallel sides and
provide a strap-shorter than usual-for each of the two end bearings. Passing
through each of the said straps and a slotted hole in the block is a screw bolt
having on one end a screw nut. The interior of the block is made hollow and
encloses a helical wire spring stretched between the two bolts the tendency of the
spring being to pull or draw the bolts inwardly towards each other. If either
of the screw bolts be loosened the spring will pull the said bolt and its strap
inwardly and so tighten up the bearing the screw nut being then screwed up so as
to securely fasten the strap to the bluck.
Improvements connected with the Crank Shaft Arms of Looms for
Weaving.
1, JOHN SEED, of 7 Mill Street, Farington, near Preston, in the County of
Lancaster, Mechanical Engineer, 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 has for its object to provide an improved means of taking up the
slack in the bearings of the crank shaft arm of a loom. Heretofore this has
usually been effected by means of double gib and taper cotter mechanism which
causes the two straps-enclosing the steps-to be drawn towards each other and so
to simultaneously tighten up each of the said end bearings. By my invention the
gib and cotter mechanism is dispensed with as also the side set screw for fastening
L

page_text: the cotter in position and separate patterns for right and left hand crank shaft
arms are no longer required. Moreover in my arrangement the end bearings may
be tightened separately or independently of each other.
In order that the nature of my said invention may be better understood I append
a sheet of drawings in which
Fig. 1 is a plan view and
Fig. 2 a side view of a crank shaft arm embodying my improvements.
In carrying out my invention I make the end bearings or steps a a¹ of the usual
form and the block or body part of the crank shaft arm with parallel sides b b and
provide a strap c c-shorter than usual-for each of the two end bearings.
Passing through each of the said straps and a slotted hole d, indicated by broken
lines in the block is a screw bolt e having on one end a screw nut f. The interior
of the block is made hollow and encloses a helical wire spring g stretched between
the two bolts ee the tendency of the spring g being to pull or draw the bolts e e
inwardly towards each other. If either of the screw bolts be loosened the spring
will pull the said bolt and its strap inwardly and so tighten up the bearing the
screw nut being then screwed up so as to securely fasten the strap to the block.
If both screw bolts be loosened both the straps c c will be simultaneously drawn
together by the pull of the spring g on the said bolts and the slack (if any) in
the respective bearings will be thereby taken up whereupon the screw nuts ff are
again to be screwed up so as to again securely fasten the two straps c c to the
block.
c is the strap for the crank shaft end of the arın and c¹ the strap for the slay
pin and as will be well understood.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The improved crank shaft arm of a loom for weaving constructed substantially
as herein described and shewn in the drawings.
Dated this 15th day of May 1895.