IMPROVEMENTS IN EXHAUSTING THE AIR, GASES, AND WATER FROM SUCTION- BOXES FOR PAPER-MAKING MACHINES
Year: 1883

page_text: LETTERS PATENT to Herbert John Allison, of the firm of Allison Brothers,
Patent Agents, of Southampton Buildings, London, for an Invention of
"IMPROVEMENTS IN EXHAUSTING THE AIR, GASES, AND WATER FROM SUCTION-
BOXES FOR PAPER-MAKING MACHINES " communicated to him from abroad by
Gilderoy Lord, of Watertown, New York, United States of America.
-
PROVISIONAL SPECIFICATION left by the said Herbert John Allison at
the Office of the Commissioners of Patents on the 20th October 1883.
HERBERT JOHN ALLISON, of the firm of Allison Brothers, Patent Agents, of
Southampton Buildings, London, "IMPROVEMENTS IN EXHAUSTING THE AIR,
GABES, AND WATER FROM SUCTION-BOXES FOR PAPER-MAKING MACHINES &
communication to me from abroad by Gilderoy Lord, of Watertown, New York,
United States of America.
"
My Invention relates to an improvement in exhausting the air, gases, and water
from suction-boxes of paper-making machines, to be used in connection with paper
and other machines where it is desired to exhaust the water from felts and pulpy
material; and it consists in the combination of one or more draft-tubes which are
connected with a reservoir of water, a connecting pipe or pipes, and a box having
a perforated cover or open top, over which the paper pulp or other material is
moved in a continuous sheet or mass, as will be more fully described hereinaftor.
The object of my invention is to form a more perfect exhaust or vacuum when
operating upon pulpy fluids containing a large amount of air or gases, so as to give
a much steadier and more reliable suction than can be obtained with siphons of
ordinary construction, or pumps as ordinarily used in connection with paper, felt,
or other pulp machines of any kind,
,
A reservoir or water-supply chamber of any suitable shape, size, or construction
which may be preferred, is connected to any suitable water-supply so as to always
maintain about the same elevation. Secured to or placed at one end of this
reservoir is a much shallower box or chamber, which is to be filled with water. or

page_text: any other fluid which will form a seal for the lower ends of the two draft-tubes.
In actual operation the lower ends of these tubes will be sealed in a stream of
running water. The shorter one of the two draft-tubes is connected to the
reservoir, near its top, by a pipe which extends a suitable distance downward into
the reservoir, and by a second pipe, at any suitable distance below the lower end of
the former, and which is provided with a stop-cock, valve, or other shut-off so
that the flow of water through it, can be controlled and regulated at will. The
longer of the two draft-tubes is connected with the shorter draft-tube, by means of
a pipe which extends from the top of the shorter tube, up near the top of the
longer tube. Also connected with the top of the longer tube, is a pipe which
extends any suitable distance down into the reservoir. Although only two draft-
tubes are herein mentioned, there may be a larger number, if so preferred. The
longer draft-tube should in no case extend from above the level of the water in the
reservoir, to a greater height than the fall from the surface of water in reservoir to
the surface of water in the shallow box or chamber. One or more tubes
used extending up about thirty feet, or near the limit of a perfect vacuum.
may be
Extending from the top of the longer draft-tube, is a pipe which has its other
end connected with the tube of a separating chamber, which can be placed in an
adjoining room, or at any desired distance from the reservoir, and at the same
level or at a higher or lower point than the draft-tube or tubes.
Leading from the side of the separating chamber, is a pipe which has its other
end connected with a box, which has a perforated cover, and over which the endless
wire cloth, or screen, or folt carrying a moist sheet of paper pulp is caused to pass,
as used on a Fourdrinier or other paper-making machine. From the bottom of the
separating chamber, extends a pipe which has its lower end immersed in water or
other sealing medium contained in a box. The term "separating" is applied to
the chamber mentioned, because in this chamber the water, air, and gas are
separated, the air and gas being drawn off through the pipe extending from the
top of the longer draft-tube and connected at its other end with the tube of the
separating chamber, into the tops of the draft-tubes, while the water and heavier
portions mixed therewith flow off through the pipe leading from the bottom of the
separating chamber, and the lower end of which is sealed by water in a box.
When desirable the separating chamber can be located on a level sufficiently
above the perforated box, and cause said chamber to discharge water out about the
same level with the box, through the pipe leading from the bottom of the chamber,
. which pipe with its sealing box is raised, care being taken to have the pipe of
same length as used to discharge on lower level. As the water which is drawn
from the paper or pulpy material often contains some of the material itself, or,
coloring matter, or chemicals of some kind, it is desirable to catch this water and
'save it, and it is therefore separated in the separating chamber.
The operation of my invention is as follows:-The lower ends of the two draft
tubes, are immersed in the water in the shallow box or chamber, so as to seal their
ends, and thus prevent air and gas working up the draft-tubes, and thus insuring
against risk of losing any part of the vacuum through that source. The gate or
stop-cock, in the second pipe mentioned as connecting the shorter draft-tube with
the reservoir, being opened; a flow of water is started through the shorter draft-
tube, and this water flowing through the latter, will carry with it enough of the
air and gas contained in this draft-tube; and start a flow of water through the first
pipe mentioned as connecting this draft-tube with the reservoir, into the top of the
shorter draft-tube. The flow of water from the latter pipe, will still further cause
the air and gas in the shorter draft-tube, to be entrained with the water, and thus
forced out of the tube, causing las near a perfect vacuum in the tube as possible.
This shorter draft-tube being connected by a pipe with the longer draft-tube, the
air and gas contained in the latter, are drawn out into the shorter draft-tube, until
a sufficient vacuum has been formed in the longer tube, to start a siphonic flow
through the pipe connected with the top of the longer tube and extending down
into the reservoir,-into the top of the longer draft-tube, the vacuum in the two

page_text: draft-tubes, caused by the downward flow of the water, will cause the gas and air
to be exhausted from the separating chamber, and the vacuum or partial vacuum
formed in this chamber, will be exerted through the pipe leading from the side of
the separating chamber to the perforated box, and the perforated cover of this box,
upon the sheet of wet paper pulp or other material which is being passed over the
top of the box.
Where it is desired to save the water for the purpose of using it over again, the
separating chamber will be used; but where it is not desirable to use the water
over again, this separating chamber will be entirely done, away with, and the
connecting pipe will then extend directly from the suction-box to the suction-tubes.
It will be seen that this separating chamber may or may not be used.
I

page_text: !
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Allison in the Patent Office on the 2nd April
1884.
"
HERBERT JOHN ALLISON, of the firm of Allison Brothers, Patent Agents, of
Southampton Buildings, London, "IMPROVEMENTS IN EXHAUSTING THE AIR,
GABES, AND WATER FROM SUCTION BOXES FOR PAPER-MAKING MACHINES" a
communication to me from abroad by Gilderoy Lord, of Watertown, New York,
United States of America.
My invention relates to an improvement in exhausting the air, gases, and water
from suction-boxes of paper-making machines, to be used in connection with paper
and other machines, where it is desired to exhaust the water from felts and pulpy
material; and it consists in the combination of one or more draft-tubes which are
connected with a reservoir of water, a connecting pipe or pipes, and a box having
a perforated cover or open top, over which the paper, pulp, or other material is
moved in a continuous sheet or mass, as will be more fully described hereinafter.
The object of my invention is to form a more perfect exhaust or vacuum when
operating upon pulpy fluids containing a large amount of air or gases, so as to give
a much steadier and more reliable suction than can be obtained with siphons of
ordinary construction, or pumps as ordinarily used in connection with paper, felt,
or other pulp machines of any kind.
DESCRIPTION OF DRAWINGS.
Figures 1 and 2 represent side elevations of my invention, taken from opposite
sides.
Figure 3 is an end view of the same.
Figure 4 is a plan view.
Figure 5 is a side elevation of my invention, showing the relative position of
the parts when in use.
C, represents a reservoir or water-supply chamber of any suitable shape, size, or
construction which may be preferred, and which is connected to any suitable
water-supply so as to always maintain about the same elevation. Secured to or
placed at one end of this reservoir C, is a much shallower box or chamber, G,
which is to be filled with water or any other fluid which will form a seal for the
lower ends of the two draft-tubes A, E. In actual operation the lower ends of
these pipes will be sealed in a stream of running water. The shorter one, A, of
the two draft-tubes is connected to the reservoir, near its top, by the pipe B, which
extends a suitable distance downward into the reservoir, and by a second pipe, H,
at any suitable distance below the lower end of the pipe B, and which pipe H, is
provided with a stop-cock, valve, or other shut-off, L, so that the flow of water
through the pipe H, can be controlled and regulated at will. The longer one, E, of
the two draft-tubes is connected with the draft-tube A, by means of the pipe T,
which extends from the top of the tube A, up near the top of the tube E. Also
connected with the top of the tube E, is the pipe F, which extends any suitable
distance down into the reservoir C. Although only two draft-pipes, A, E, are here
shown, there may be a larger number, if so preferred. The draft-tube E, should in
no case extend from above the level of the water in the reservoir C, to a greater
height than the fall from surface of water in reservoir C, to the surface of water
in G. One or more tubes may be used extending up about thirty feet, or near the
limit of a perfect vacuum,

page_text: Extending from the top of the draft-tube E, is a pipe N, which has its other end
connected with the tube of the separating-chamber M, which can be placed in an
adjoining room, or at any desired distance from the reservoir, and of the same level
or at a higher or lower point than the draft-tube or tubes. This separating-
chamber is here shown as placed above the top of the reservoir merely as a matter
of convenience and not as a matter of necessity.
Leading from the side of the separating-chamber M, is a pipe P, which has its
other end connected with the box O, one only being shown, which has a perforated
cover, and over which the endless wire cloth, or screen, or felt carrying a moist
sheet of paper-pulp is caused to pass, as used in a Fourdrinier or other paper-making
machine. From the bottom of the separating-chamber M, extends a pipe R, which
has its lower end immersed in water or other sealing medium contained in the
box S. The term "separating" is applied to the chamber M, because in this
chamber the water, air, and gas are separated, the air and gas being drawn off
through the pipe N, into the tops of the draft-tubes A, E, while the water and
heavier portions mixed therewith flow off through the pipe R.
When desirable, separating-chamber M; can be located on a level sufficiently
above the perforated box O, and cause said chamber to discharge water out about
the same level with box, through pipe R, which, with box S, is raised, care being
taken to have pipe R, of same length as used to discharge on lower level. As the
water which is drawn from the paper or pulpy material often contains some of the
material itself, or coloring matter, or chemicals of some kind, it is desirable to catch
this water and save it, and it is therefore separated in the chamber M.
The operation of my invention is as follows:-The lower ends of the two draft-
tubes A, E, are immersed in the water in the box G, so as to seal their ends, and
thus prevent air and gas working up the draft-tubes, and thus insuring against
risk of losing any part of the vacuum through that source. The gate or stop-cock L,
in the pipe H, being opened, a flow of water is. started through the pipe A, and
this water flowing through the pipe A, will carry with it enough of the air and
gas coutained in the pipe A, and start a flow of water through the pipe B, into the
top of the tube A. The flow of water from this pipe B, will still further cause the
air and gas in the pipe A, to be entrained with the water, and thus forced out of
the pipe, causing as near a perfect vacuum in the pipe as possible. This pipe A,
being connected by the pipe T, with the second draft-tube E, the air and gas
contained in the pipe E, are drawn out into the pipe A, until a sufficient vacuum
has been formed in the pipe E, to start a siphonic flow through the pipe F, into the
top of the draft-tube E. The vacuum in the two pipes A, E, caused by tho
downward flow of the water, will cause the gas and air to be exhausted from the
separating-chamber M, and the vacuum or partial vacuum formed in this chamber M,
will be exerted through the pipe P, and the perforated cover of the box O, upon
the sheet of wet paper, pulp, or other material which is being passed over the top
of the box O.
Where it is desired to save the water for the purpose of using it over again, the
separating-chamber will be used; but where it is not desirable to use the water
over again, this separating-chamber will be entirely done away with, and the
connecting-pipe will then extend directly from the suction-box to the suction-tubes.
It will be seen that this separating-chamber may or may not be used.
I am aware that a pipe has been connected to the bottom of a suction-box, and
steam or water forced through the pipe; but this device is dependent entirely for
its action upon the amount of air which will be drawn in by the current. My
invention differs from this in connecting one end of a pipe with the suction-box,
and the other to a stand-pipe through which a great suction is caused by the fall
of a large body of water. In the one case only a slight and indirect suction is
caused, while in the latter a positive and direct suction is caused.
I am also aware that pipes provided with cocks have been connected with the
suction-box, so that when the cocks are opened the water will flow freely out. My
invention differs from this in connecting the reservoir with a stand-pipe by a short

page_text: pipe provided with a cock, whereby when the cock is opened the water flows into
the stand-pipe and starts the whole machine in operation. In neither of the
above-mentioned cases are stand-pipes employed, while the whole operation of my
invention depends on them.
Having thus described my invention, I claim :-
1. The combination of one or more draft-tubes, A, E, connected by a suitable
pipe or pipes with the reservoir of water, and a perforated or open box O, over
which a sheet of moist paper, pulp, or other material is made to pass, substantially
as shown.
2. The combination of one or more draft-tubes A, E, having their lower ends
submerged in a sealing medium, with suitable pipes by which they are connected
with the reservoir, and a separating-chamber M, which is connected with a
perforated or open box O, substantially as described.
3. The combination of one or more draft-tubes A, E, connected by suitable pipes
with the reservoir, the separating-chamber M, and pipes N, P, R, and a perforated
or open box O, substantially as set forth.
4. The combination of the separating-chamber, the pipe P, for connecting it with
a perforated or open box, and the pipe R, having its lower end immersed in a
sealing medium, whereby the air and water are withdrawn from the paper, pulp,
or other material by the vacuum created in the chamber, and caused to separate,
substantially as specified.
5. The combination of a reservoir, a draft-tube A, having the siphonic tube B,
connected with its upper end, and a tube H, provided with a gate or stop-cock
connecting the draft-tube with the reservoir C, whereby the flow of water can be
started through the tube B, substantially as shown and described.
6. The combination of the suction-box of a paper-machine, with a connecting-
tube, and one or more draft-tubes which are connected directly thereto, so that the
draft-tubes will exert a direct suction upon the box, substantially as shown and
described.
In witness whereof, I, the said Herbert John Allison have hereunto set my hand
and seal this Second day of April, in the year of Our Lord One thousand eight
hundred and eighty-four.