IMPROVEMENTS IN LOOMS FOR WEAVING AND IN APPARATUS CONNECTED THEREWITH."
Year: 1877

page_text: PROVISIONAL SPECIFICATION left by Thomas Hargreaves Brigg at the Office
of the Commissioners of Patents on the 15th November 1877.
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THOMAS HARGREAVES BRIGG, Machine Maker, of Vulcan Iron Works, Dudley
Hill, near Bradford, in the County of York. IMPROVEMENTS IN LOOMS FOR
WEAVING AND IN APPARATUS CONNECTED THEREWITH."
This Invention relates to employing an apparatus for delivering the warps at any
required tension, dispensing with ropes and weights, and facilitating the pulling
back.
Also in employing an apparatus for regulating the pressure of the piece beam
on the driving or taking up beam.
For the purpose of delivering the warps at any required tension and pulling
back, I fit on each end of the back of the loom frame, brackets which are secured
by bolts and nuts. On the bottom ends of these brackets I fix chairs made to
suit the circle of the hooped ends of the warp beam; these chairs are lined with
cloth or leather. On the tops of the beam hoops I fit caps having projecting lugs
formed on the tops and in the centre of the caps. Over these caps I fit levers,
whose fulcrums work in bosses made on the tops of the brackets. The levers are
made with openings fitting on the tops of the cap lugs. The levers project over the.
warp beam, the ends of which are hooked. Over these hooks are passed links or
rods having looped ends. The bottom ends of the links or loops are passed over
hooked ends of levers working on studs fitted in bosses cast on the bottom parts of
the brackets; the levers hang down.
One of the levers is made with a jaw in which works a short lever having a
handle. To the short lever is fitted a spiral spring, and to the spring is fitted a
rod, which passes through a boss formed on the end of the other hanging down
lever. The rod is cut with a screw, over which is screwed a thumbscrew to
regulate the tension of the hanging down levers, which are capable of being locked
and secure from the weaver's interference. On the stud of one of the levers is
fitted a grooved pulley, over which works a chain fixed at one end to the handle,
and the other end to a lever fitted on a stud fixed to the spur rail of the loom. On
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page_text: this spur rail is also fitted a bearer, through which passes a rod having a jaw, in
which is fitted a wood ball, which works under the warp beam and presses on the
warps.
The bearer is made with a slotted opening, in which works a stud fixed to the
rod of the wood ball bearer. On the stud is passed the lever fitted to the spur
rail.
As the warps wound on the warp beam are delivered, the wood ball rises, lifting
up the spur rail lever, lowering the handle, reducing the pressure on the spiral
spring, slowly taking off the pressure on the caps and chairs pressing on the hoops
of the warp beam.
For regulating the pressure on the piece beam, I fit on suitable fixings small
grooved pullies, over which works chains having hooked bearers, which are passed
under the piece beam shaft or journals. The other ends of the chains are fixed to
links, which are passed over the top of levers; these levers work on studs fitted in
brackets bolted to the loom frame ends. The links are fitted on the other end with
chains fixed to spiral springs fitted to the rail of the loom.
As the fabrics are wound on the piece beam, the chains are drawn down and the
levers slightly moved, pulling the spiral spring, which regulates and equalizes the
pressure on the piece beam. A lever is employed to remove the pressure when
pulling back to arrange the fabrics when required.