IMPROVEMENTS IN LOOMS
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said Arthur Priestman and James
Ackroyd at the Office of the Commissioners of Patents on the 20th March
1882.
ARTHUR PRIESTMAN and JAMES ACKROYD, both of Bradford, in the County of
York IMPROVEMENTS IN LOOMS
The object of our invention is to arrange the warp break apparatus in such a
manner that we are enabled to let the warp off the beam with more regularity
and consequently to weave fabrics more uniform than is the case when the beans
are breaked in the ordinary manner.
In carrying out our invention we place the break ropes round the ends of the
warp beams in the usual manner, but instead of securing the ropes at each end of
the warp beam direct to the weighted levers we secure them to a bar passing
right across. To this bar the weighted levers are attached by means which admit
of regulation. The bar is immediately below and in line with the warp beam,
between the latter and the weighted levers. The warp is passed in the ordinary
manner from the warp beam up and over the back rail of the loom. In our
improvement the warp is passed down and under the bar then up and over the
back rail of loom to the sley and healds.
By means of the intervention of this bar the warp is supplied to the loom with
greater regularity thus improving the weaving of the piece.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Arthur Priestman and James Ackroyd in the Great Seal Patent
Office on the 20th September 1882.
ARTHUR PRIESTMAN and JAMES ACKROYD both of Bradford, in the County of
York IMPROVEMENTS IN LOOMS
The object of our invention is to arrange the warp break apparatus in such a
manner, that we are enabled to let the warp off the beam with more regularity,
and consequently to weave fabrics more uniform than is the case when the warp
beams are breaked in the ordinary manner.
:
The invention consists in placing a bearing bar across the loom immediately
above or below and parallel with the axis of the beam upon which the warp is
placed the break ropes being secured to the bearing bar instead of to the ordinary
levers, pass round the warp beam in the usual manner, and the warp from the
beam in lieu of passing direct over the back rail of the loom, takes first a downward
course, passes around the underside of the bearing bar, then over the back rail of
the loom to the sley and healds.
In order that our invention may be better understood, we will proceed to
describe the same by reference to the accompanying drawings, in which Figure 1
represents à back elevation of such portions of a loom as are required to make
clear our invention, which is shewn fitted thereto. Figure 2 is a cross section
shewing the direction taken by the warp after leaving the warp beam. Figure 3
is an enlarged plan view of one end of the bearing bar, and Figure 4 is a cross
section through the same.
The warp beam A is mounted in the loom ends in the usual manner, and the
break ropes: B: pass round the beam ends as usual, but instead of being attached to
the weighted levers in the ordinary way, they are attached to the links C, or to
hooks, as the case may be which are secured near each end of the bearing bar D:
the other ends of the break ropes B are secured to studs, or to the barrels E,
mounted on studs secured to the loom ends.
The bearing bar D extends the width of the loom, and is connected to the
weighted levers F by the links C.
The warp from the beam instead of passing direct over the back rail G, is
conducted down and underneath the bearing bar D, then up to the back rail G,
and forward to the healds in the usual manner.
By the application of the bearing bar D; the breaked warp beam will not allow
any of the warp to escape therefrom; except when the bar is raised: this is effected
as follows: When the tension on the warp is sufficient to raise the bearing bar D,
and the levers and weights F connected therewith, the ropes B are slackened,
thereby reducing the friction between the ropes and the warp beam ends, allowing
the beam to: "let off" the warp which as soon as released, reduces the tension
on the warp, and allows the bearing bar and weights to resume their normal
position.
When the bearing bar D is placed above the warp beam, (sec Figure 5) the
warp from the beam is first conducted over a roller R supported by brackets
attached to the loom ends, the, warp after leaving the roller passes. under the
bearing bar D, over back rail G, and forward to the healds. The bearing bar D
when placed above the warp beam, is connected by rods S to another bar D¹
extending across the loom below the warp beam: to the bar D¹ the weighted levers
and break ropes are attached in the manner as before described; thus when the
bearing bar D is raised by the tension of the warp, the bar D₁ is raised also,
thereby slackening the break ropes, and allowing the warp beam to "let off"
the warp.

page_text: By the raising of the bearing bar in the manner described, the break ropes do
not bind the beam so fast as is the case when the ropes are secured to the weighted
levers;
the instant unusual tension is put upon the warp either uniformly or at
either end of the beam, the bar is raised, reducing the tension on the ropes or rope
thereby releasing the warp beam.
Having thus described our invention, and the manner of carrying the same into
effect, we wish it to be understood that what we consider to be novel, and desire
to secure as our invention is :-
The introduction of a bearing bar under which the warp is passed substantially
in the manner and for the purpose as herein before described.
In Witness whereof; I the said Arthur Priestman for and on behalf of myself
and the said James Ackroyd have hereunto set my hand and seal this
18th day of September in the year of our Lord, one thousand eight
hundred and eighty-two
ARTHUR PRIESTMAN. (L.S.)