IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1878

page_text: LETTERS PATENT to George Francis Bradbury, of Crumpsall House, Crumpsall,
near Manchester, in the County of Lancaster, Gentleman, and Henry Lomax, of
Darwen, in the County aforesaid, Sewing Machine Maker, for the Invention
of " IMPROVEMENTS IN LOOMS FOR WEAVING."
Sealed the 6th May 1879, and dated the 9th November 1878.
PROVISIONAL SPECIFICATION left by the said George Francis Bradbury
and Henry Lomax at the Office of the Commissioners of Patents on the 9th
November 1878,
GEORGE FRANCIS BRADBURY, of Crumpsall House, Crumpsall, near Manchester,
in the County of Lancaster, Gentleman, and HENRY LOMAX, of Darwen, in the
County aforesaid, Sewing Machine Maker. "IMPROVEMENTS IN LOOMS FOR
WEAVING."
This Invention consists of an improved arrangement and combination of apparatus
for determining and regulating the tension of the warp when and during the "letting
off" the warp from the beam.
According to this our Invention we employ a balance lever the fulcrum of which
is (by preference) below the access of the warp beam. One end of the ordinary
beam rope is after passing round the neck of the beam attached to the lever referred
to, the other end of the rope to a stud or spring as usual. The fulcrum lever
extends to about the outer diameter of the flange of the beam and terminates in a
hook or projection.

page_text: The rope or chain from the ordinary weighting motion is passed over the lever at
or near its end when the beam is full, and bears on or against one prong of the
fork free to move on a stud or hinge piece. The other prong of the fork bears upon
and against the warp on the beam so that as the bean decreases in diameter the fork
gradually approaches or moves in the direction of the axis of the beam and permits
the light movement of the weight rope or chain along the lever, thus varying and
regulating the leverage power upon the beam rope, and so adjusting and regulating
the tension upon the warp to the varying diameter of warp upon the beam.
If desirable a separate weight and rope may be used in connecting with the lever
and fork motion described in lieu of the ordinary weights and rope or chain.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Francis Bradbury and Henry Lomax in the Great Seal
Patent Office on the 9th May 1879.
GEORGE FRANCIS BRADBURY, of Crumpsall House, Crumpsall, near Manchester,
in the County of Lancaster, Gentleman, and HENRY LOMAX, of Darwen, in the
County aforesaid, Sewing Machine Maker. "IMPROVEMENTS IN LOOMS FOR
WEAVING."
This Invention consists of an improved arrangement and combination of apparatus
for determining and regulating the tension of the warp when and during the "letting
off" the warp from the beam.
According to this, our Invention we employ a compound lever, the fulcrum of
which is (by preference) below the axis of the warp beam. One end of the ordinary
beam rope or chain is after passing round the neck of the beam attached to the
lever referred to; the other end of the rope is attached to a stud or spring as
usual.
The fulcrum or compound lever extends to about the outer diameter of the flange
of the beam, and terminates in a hook or projection.
The rope or chain from the ordinary weighting lever is passed or looped over the
compound lever at or near its end when the beam is full, and bears on or against
one prong of a fork free to move on a stud or hinge piece. The other prong of the
fork bears upon and against the warp on the beam, so that as the beam decreases in
diameter the fork gradually approaches or moves in the direction of the axis of the
beam and permits the like movement of the weight rope or chain along the lever,
thus varying and regulating the leverage power upon the beam rope, and so
adjusting and regulating the tension upon the warp to the varying diameter of
warp upon the beam.
If desirable a separate weight and rope may be used in connection with the
compound lever and fork motion described in lieu of the ordinary weight and rope
or chain.
Such being the nature and object of this our said Invention, we will now proceed
to describe the same in detail, and in order that the Invention may be fully under-
stood we have hereunto annexed a Sheet of Drawings illustrative thereof, in which
Fig. 1 is an end elevation of beam showing our improvements applied thereto;
Fig. 2, an elevation taken from the back of the loom.
DESCRIPTION OF THE DRAWINGS.
At 1, Fig. 1 is the compound lever. The fulcrum 2 is (by preference) below the
axis 3 of the warp beam 3a. One end of the rope or chain 4 after passing round
the neck of the beam 3a is attached to the lever 1; the other end of the rope 4 is
secured to a stud or spring 5 as usual.
The fulcrum or compound lever 1 extends to about the outer diameter of the
flange of the beam 3ª, and terminates in a hook or projection 6.
The rope or chain 11 is secured at one end by stud or hook 13" to the end frame;
at its other end is the weight 12.
13 is a pulley on which the rope rests. The said pulley is carried by a stud
attached to the prong 8 of the fork 9 (see Fig. 3.) The stud also carries the pulley 14
resting on the lever 1. The other prong or feeler 7 bears on the warp upon the
beam, the fork 9 being free to move on a stud of the hinge 10 of the jointed arm 15,
so that as the beam decreases in diameter the fork gradually approaches or moves
in direction of the axis of the beam and permits the like movement of the weight
rope or chain 11 along the lever 1, thus varying and regulating the leverage power
of the weight upon the beam or chain so adjusting and regulating the tension upon
the warp to the varying diameter of warp upon the beam,

page_text: At Fig. 4 the rope or chain 11 at one end is attached to the stud 13ª, its other
end to the ordinary weighting lever 16; 17 is a guide arm for preventing lateral
movement of the lever 16.
Having thus fully described the nature and object of this our said Invention,
together with the manner in which the same is to be or may be performed or carried
into practical effect, we would have it understood that what we claim as our
Invention is,―
The combination of the fork 9 and the lever 1, the fork having its finger 7 bearing
upon the warp in manner and for purpose described.
In witness whereof, I, the said George Francis Bradbury, for and on behalf of
myself and the said Henry Lomax, have hereunto set my hand and seal,
this Fifth day of May, in the year One thousand eight hundred and
seventy nine.
Witness,
WALTER BRIERLEY,
Patent Agent,
Halifax & Blackburn.
GEORGE FRANCIS BRADBURY. (L.S.)