· Employed in Looms for Operating the Healds.
Year: 1886

page_text: · Employed in Looms for Operating the Healds.
I, JAMES HOLLINGWORTH, Managing Director of the firm of Hutchinson
Hollingworth and Company (Limited) of Dobcross Iron Works, Dobcross,
Yorkshire Machine Makers do hereby declare the nature of my invention for
"CERTAIN IMPROVEMENTS CONNECTED WITH DOBBIES OR JACQUARDS EMPLOYED
IN LOOMS FOR OPERATING THE HEALDS," 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 reference to that description of dobby or jacquard employed
in looms where vibrating wheels are employed for operating the healds.
In this description of loom the healds are operated up and down by means of
jack levers or bell crank levers, such levers being, actuated by means of certain
toothed discs called vibrating wheels, the said jack levers being attached to the
discs by means of connecting rods which have hitherto been placed on one side or
face of the discs, and attached thereto by washers and revits, the said discs being
first countersunk to receive the washers.
There is also connected to the said discs certain vibrating levers which are
attached to the discs on one side in the same manner as the connecting rods. In
practice I have found that in consequence of the connecting rods and vibrating
levers being attached to only one side of the discs, that there has necessarily been
a good deal of one sided strain both on the revits and discs, causing the said revits
to work loose and also prevented the free working of the discs.
The object of my present invention is to construct the connecting rods and the
vibrating levers, and attach them to the discs in such manner as to avoid any one
sided strain, and thus allow free and even working of the rotary discs.
.
In carrying out my invention I make the connecting rods with open ends some-
what like a fork, so that the discs can be placed between, but leave sufficient
working room as to allow for rotary motion of the discs, and the vibrating levers
I make after the manner of a sheaf having certain slots or open parts, so that the
discs can be placed between, and yet leave working room, one of such slots being
long enough to receive a steel or other metal piece for resting upon the ordinary
lifting bowls or pegs.

page_text: Such being the nature and object of my Invention, I will now proceed to describe
the same more fully, and for that purpose make reference to the accompanying
sheet of drawings illustrative thereof, wherein A is the usual bell crank lever
working upon the centre or fulcrum B, and C is.a connecting rod attached by revit b
to the toothed disc or vibrating wheel D, and C¹ is the vibrating lever also attached
to the vibrating wheel by revit a.
These parts C and C¹ I now make of thin metal blades or plates (proferably steel)
as shewn in plan Fig. 1 and Fig. 2 and the parts not required open as at c and
are filled up by suitably shaped pieces of steel or other metal, and when making
the vibrating lever it is placed under a punch or other instrument and pressed
thereby into the form shewn in the drawings, and afterwards revitted together as
seen at d the part at k being specially prepared to resist wear as it is acted upon.
by the rotary bowls or pegs m:
After the parts C and C¹ are made in the manner set forth and shewn, the
vibrating wheel D is placed between the open parts and secured thereto in such
manner, that the connecting bars C and vibrating levers C have hold of both sides
of each disc, consequently the backward and forward pull is equal on both sides,
making the parts more durable and easier to work, and yet taking up no more room
in width than the present one sided method of fastening.
The manner of connecting the rod C and vibrating lever C₁ to the disc is some-
what as follows; although it is not absolutely necessary to confine it to this
method I bore, a hole in the disc of a suitable size and insert therein a steel or
other metal collar e a little thicker than the disc; the forked end of the connecting
rod and the open part of the vibrating lever are then placed over the disc and made
secure by a revit. The end f of the connecting rod is also forked so as to receive
the part g of the bell crank lever A which hooks onto a projection h at each side of
the said lever.
This construction of rods and levers and method of fastening is not only much
better than the present method; but it is cheaper as there is no necessity to make
countersunk places in the discs for the reception of washers and if the collar e
wears away it can easily be removed, and another one substituted in addition to
which the tension on the discs is equally divided on both sides.
-
:
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is;
The construction of the connecting rods C with open ends, and the vibrating
lever Chaving slots or openings therein as shewn, so as to receive and be secured
to both sides of the dises or vibrating wheels D in manner substantially as herein
shewn and described.