IMPROVEMENTS IN LOOMS FOR WEAVING AND IN APPARATUS CONNECTED THEREWITH
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by Charles Brigg and Thomas Hargreaves
Brigg at the Office of the Commissioners of Patents on the 9th December
1879.
CHARLES BRIGG and THOMAS HARGREAVES BRIGG, of Bradford, in the County
of York, Machine Makers. "IMPROVEMENTS IN LOOMS FOR WEAVING AND IN
APPARATUS CONNECTED THEREWITH."
This Invention relates to further improvements in apparatus connected with
loons for weaving, for which Letters Patent were granted to us, dated the
Eighteenth day of March, One thousand eight hundred and seventy eight,
Number 1064, and our present improvements consist,-
-
Firstly. In further improvements in apparatus for delivering the warps with
equal tension from end to end without manual labour.
Secondly. In further improvements in apparatus for reducing the pressure on
the piece beam as the fabrics are woven and wound on the beam.
Thirdly. In apparatus for keeping an equal tousion on the warps when the healds
or heddles are open or closed, producing a good cover on the fabrics.
For the purpose of delivering the warps with equal tension and for pulling back,
we fit on each end and at the back of the loom brackets of similar construction to
those shewn and described in our former Patent, and also employ the compound
levers. On the spur rail of the loom we fit a bracket, in the top of which is fitted a
stud on which works the fulcrum of a lever having a long and a short arm; on the
end of the long arm is fitted a stud on which works a bearing plate which presses
on the warps, and which is kept in pressing position by means of a weight cast or
fitted on the end of the short arm. In the centre line of the fulcrum and connected
to the lever and at an angle is cast a short dropping arm in which is made a slot
hole, and in which is fixed a stud on which works a small pulley, and on the stud
on which works the lever is fitted another pulley; over these pullies is passed a
chain, and to the end of the chain passing over the top pulley is fitted a rod which
hooks in the short arın of the handle of the compound levers, and the other end of
the chain passing over the bottom pulley is also fitted with a rod which passes
through a boss made on the end of a hanging down lever; the end of this rod which
is passed through the boss is fitted with a spiral spring and thumb screw. As the
warps are wound off the beam by the weaving operations the bearing plate rises

page_text: bringing down the short arm having the pulley over which works the chain,
reducing the pressure and taking off the pressure on the warps as the weaving
operations take place.
Secondly. The improvements for reducing the pressure on the piece beam as the
fabrics are woven. We employ similar piece beam supports to those shewn and
described in our said former Patent, and instead of the levers with hooks we employ
T levers; one end of each of these levers is connected to the beam supports, the
other end to arms cast on bearers which are secured to the spur rail of the loom.
The piece beam supports are made with openings through which pass chains which
are connected to rods, and which rods are secured to a strong spiral spring; one of
the chains is secured to a stud fitted to one of the piece beam supports, the other
chain passes over a guide cast on the pressure handle, and the end is Lecured to a
rod having a screwed end; this rod passes through a boss cast on the handle, and
nuts are screwed on the rod to secure the chain in position. A rod having a hook
is fitted to one of the beam supports; the hook is passed on the handle when the
pressure is put on to keep the pressure on the pieco beam. We can by these means
regulate to any degree the pressure to suit any class of work.
Thirdly. The apparatus for keeping an equal tension on the warps when the
healds or heddles are open or closed and producing a good cover on the fabrics
is constructed with an oscillating rail fitted at the back of the loom. The rail is
made with round projecting ends which work in bearings which are secured to the
loom frames; on one of these rounded ends (but both ends may be fitted with an
apparatus) we fit a short lever having notches on the top, and the underside of the
lever is made with a lug in which a hole is made, and through which hooks the
end of a rod which is secured to the top of a spiral spring; the bottom of this
spring is also fitted with a rod which is secured over a hook cast on a bracket,
which is secured to the loom frame; the spiral spring helps to keep the oscillating
rail in working position. Over the short lever and on one of the notches is passed
and placed a loop formed on the end of a rod; the other end of the rod is also
made with a loop which is passed over and secured to a hook formed on the end of
a long lever; the other end of the lever is made with a boss and works on a stud
fitted in the top of a bracket which is secured to a rail of the loom frame; the top
of the lover is made with notches to keep in position a moveable weight. A stud
fitted in the top of the weight falls in any notch which the weight may be placed
to, and prevents the weight moving out of working position when the required
position of the weight is fixed, and the position of the weight depends on the
pressure required to be placed on the oscillating rail.