Improvements in Looms for Weaving Wire Cloth for Paper Machines.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Looms for Weaving Wire Cloth for Paper
Machines.
We, JAMES BRODIE, of Great Eastern Road, in the County of the City of Glasgow,
North Britain, Engineer, and WILLIAM GIBB BROWN, of Carntyne, Shettleston,
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide an apparatus for reducing the manual
labour at present employed to work the lay of the paper machine wire cloth looms.
The apparatus consists of a cylinder with piston. The piston rod has a ball at one
end resting in a socket in the piston so that when the piston rises the rod is forced up
but the rod is free to be lifted without the piston. The upper end of the piston rod
is attached to the horizontal arm of a bell crank lever near to the pivoted angle of
the lever. The end of this horizontal arm is connected to a rod carrying a weight
which rests on a spiral spring when the piston is at the bottom of its stroke. The
end of the other arm of the bell crank lever is connected by a rod or link to the lay
of the loom. The piston may be actuated by steam, compressed air, or hydraulic
power. When the lay is standing the pressure is on the underside of the piston and
the piston is at the top of its stroke. The weight is lifted by means of its connec-
tion to the piston rod and held suspended above the spring. When the lay is to be
started the pressure under the piston is relieved by a three way cock or valves acted
on by a bell crank lever, treadle or otherwise. The piston support being thus
removed the weight falls on the spiral spring. The energy acquired in falling com-
presses the spiral spring more than the weight at rest would do. The spring in
turn re-acts and lifts the weight which, again falls slightly.
By this means the two blows required in the operation are obtained.
Improvements in Looms for Weaving Wire Cloth for Paper
Machines.
We, JAMES BRODIE, of Great Eastern Road, in the County of the City of Glasgow,
North Britain, Wire Weaver, and WILLIAM GIBB BROWN, of Carntyne, Shettleston,
North Britain, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:―
The chicot of this invention is to provide an apparatus for reducing the manual

page_text: labour at present employed to work the lay of the paper machine wire cioth
looms.
In order that our invention may be properly understood and readily carried into
effect we have hereunto appended three sheets of drawings of which,
Figure 1 is a side elevation of the apparatus wherein liquid at a low pressure is
used.
Figure 2 is a plan of the same.
"
Figure 3 is a general view of the apparatus as applied to a loom, the apparatus
being actuated by a fluid at a bigh pressure.
Figures 45 and 6 are side elevation plan and end view respectively of a valve or
cock used in connection with the apparatus as illustrated in Figure 3.
The invention consists of a cylinder A with piston B. The piston rod C has a ball
at one end resting in a socket in the piston B so that when the piston, B Brises the
rod C is forced up but the rod C is free to be lifted without the piston B. The upper
end of the piston rod C is attached to the horizontal arın d of a bell crank lever D
near to the pivoted angle of the lever. The end of this horizontal arm d is connected
to a vertical rod E carrying a weight F, which rests on a spiral spring Gwhen the
piston B is at the bottom of its stroke. The end of the other arm d¹ of the bell
crank lever D is connected by a rod or link to the lay of the loom. It is intended to
actuate the piston B by water at a low pressure, but steam, compressed air, or
hydraulic power may be used. The pressure is on the underside of the piston B and
the piston B is at the top of its stroke. In this position the lay is forced in the
direction of the heddles of the loom, which is its normal position. The weight is
lifted by means of its connection to the piston rod and held suspended above the
spring G.
When the lay is to be started the pressure under the piston B is relieved
by a three way cock or valves M connected to a crank, lever, treadle H or otherwise,
acted upon by the attendant. The piston support being thus removed the weight
falls on the spiral spring and this operation beats up the last thread of wire thrown
by the shuttle. The energy acquired in falling compresses the spiral spring & more
than the weight at rest would do. The spring G in turn re-acts and lifts the weight,
and causes the lay to rebound, which again falls slightly and this second fall finally
beats up the weft of the wire cloth.
By this means the two blows required in the operation are obtained.
The
Referring to Figure 3, the apparatus there shown consists of a pivoted arm D1
which is thrown forward by the piston or plunger B¹. The upper end of the said
pivoted arm D¹ is connected by means of a rod I to the lay J of the loom.
inotive power used for actuating the piston or plunger B¹ is a fluid, which. may be
elastic or non-elastic. In the present case I use water under pressure, which is forced
into the cylinder A¹ by means of a force pump led from an accumulator, not shown,
which is so arranged that a sufficient head or pressure has been imparted to it. The
water under pressure is let into the cylinder by the pipe K, passing through valve
plug M which is connected to cylinder with a portway in barrel of valve, and its
function is to thrust the piston or plunger B¹ in an outward direction. The outward
end of the piston or plunger B¹ impinges on the antifriction roller e with which the
lower end of the arm D is mounted. By means of a chain f passing over a pulley g
and the counter-weight working within a cylinder L the tendency of the arm
would be to fall towards the said cylinder L.
'
The valve casing A¹ has a hollow valve plug M¹ which has a conical termination m,
which rests in a corresponding conical recess formed by the valve casing. The other
end of the valve plug terminates outwardly with a stem or shank m¹ upon which is
mounted a wheel or quadrant N, but which is wanting in Figures 4, 5, and 6 and by
which the valve is controlled and acted upon. A chain and spring o connects the
wheel or quadrant N to a corresponding quadrant or pulley O, which is mounted upon a
square shaft or spindle Pupon which is fitted the treadle Q, as seen in Figure 3.
The outward thrust of the pivoted arm 11 throws the lay J towards the heddles of
the loom and the attendant requiring to beat up the thread of wire last thrown
places his foot upon the treadle Q, which causes the shaft or spindle P to turn and

page_text: with it the wheel or quadrant O. By the turning of the wheel or quadrant o motion
is communicated to the wheel N by chain n, the latter causing the valve plug M¹ to
turn within its casing, this operation has exposed a port or orifice p (shown in dotted
lines Figure 6) formed on its conical end, as previously referred to, and opens up a
communication to the water under pressure, which escapes through the hollow of the
valve plug and discharges itself by the pipe R and is conducted back to the accumu-
lator. The pressure thus being taken off the piston or plunger B¹, the arm D¹,
by virtue of the chain and weight f and h has brought the lay into operation
for beating up the last weft wire. The weight h, also the weight of lay, in falling
comes into contact with the spiral spring G¹, which it compresses, the spring now
re-acts on the weight and lifts it and the arm D¹, and lay J rebounds, the latter
again falls against the weft and completes the second operation of beating up the
weft.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
1. The method and means of automatically operating the lay of wire cloth
looms by the employment of a cylinder with a regulating valve and a fluid
pressure controlled piston, which communicates motion to a pivoted arm which
is connected to the said lay of the loom, the said arm being brought into opera-
tion in order to beat up the weft wires by counteracting weights and connecting gear
operating substantially in the manner herein before described and illustrated in the
accompanying sheets of drawings.
2. The general arrangement and combination of parts operating substantially in
the manner herein before described and illustrated in the accompanying sheets of
drawings.
1
1
T
1000
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicants' Patent Agents.