IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Charles Timothy Bradbury and
Richard Henry Harrison at the Office of the Commissioners of Patents on
the 23rd July 1881.
CHARLES TIMOTHY BRADBURY, of Buckton Grange, Buckton, in the County of
Chester, Cotton Manufacturer, and RICHARD HENRY HARRISON, of Dukinfield, in
the said County, Warehouseman. "IMPROVEMENTS IN LOOMS FOR WEAVING."
Our Invention relates to that part of the loom known as the letting off motion,
and consists in arrangements whereby we are enabled to give off an uniform and
regular quantity of warp from the warp roller for weaving. For this purpose we
use two cone pullies turning in bearings carried by the frame-work of the loom.
One of these cones we connect by gearing to the "sand roller," which "takes up" the
piece" after being woven; the other cone we connect by means of gearing to the
yarn beam or warp roller.
"1
In the circumferences of the cones we form slots parallel with their axes, such
slots being provided with jaws capable of sliding in the slots aforesaid, and at the
same time by means of projecting parts formed thereon of following the contour of
the surfaces of the cones. The outer ends of the before named jaws we form with
notches or grooves, so as to constitute flanges to receive an endless rope or band
passing around the before named cones to transmit motion from one to the other.
Upon the framework we mount a rod carrying a pulley which we cause to bear
against the endless cord or band by means of screws for the purpose of regulating
the tension thereof. The inner ends of the jaws aforesaid have projecting parts
formed therein, which pass between flauges formed upon screw nuts carried by and
taking into worms or screws, the ends of such screws passing through the axles of
the before named cones which are made tubular for the purpose. We prevent the
rotation of the before named nuts by passing rods through them, the ends of such
rods being carried in bushes mounted within the tubular bosses of the cones.
To prevent the aforesaid bushes being rotated we connect them by means of a bar.
Upon the ends of the before named screws we mount toothed pinions gearing into
a wheel, upon the boss of which is a pinion taking into the teeth of a rack capable
of sliding upon guides.

page_text: Into one end of the before named rack is tapped a worm or screw; upon the end
of this screw is a pinion gearing into a wheel carried by the framework before
named. Around and attached to the boss of the aforesaid wheel passes one end of
a chain, the other end being attached to a bar sliding in guides carried by the
framework of the loom. This slide is provided at its end with a roller which is
pressed against the circumference of the warp wound upon the warp beam or roller.
When the loom is in action, motion is communicated from the sand roller to one of
the cone pullies before named, which by means of the above named endless rope or
band transmits motion to the other cone, which by its connecting gearing rotates
the warp roller or beam so as to "let off" the warp or yarn. As such yarn is given
off the diameter of the warp is reduced, and the roller previously named being pressed
against the circumference of the warp upon the warp beam or roller will be allowed
to approach the axis of the said warp roller, thereby drawing forward the before
named chain and turning the boss of the wheel to which it is attached, thereby
acting upon the screw tapped into the toothed rack previously mentioned, causing
the screw to be turned in an outward direction, thereby causing the said screw to
arrive in contact with a vibrating lever actuated by any convenient part of the
loom. The aforesaid screw and rack will be bodily moved backwards by the before
named vibrating lever. Such bodily movement of the rack acting upon the wheel
into which it gears, upon the boss of which is mounted the wheel gearing into the
wheels previously described mounted upon the ends of the above named screws
will cause the above mentioned nuts to be traversed along their screws, thereby
causing the endless band or cord before named to be shifted to a different diameter
of the cones by the previously named jaws or guides, and thereby regulating the
amount of warp "let off" from the warp beam aforesaid.