REGULATING THE PRESSURE OF GAS, STEAM, WATER, OR OTHER FLUIDS
Year: 1855

page_text: LETTERS PATENT to Dundas Smith Porteous, of the Town of Paisley,, in
the County of Renfrew, Scotland, for the Invention of "REGULATING
33
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COMPLETE SPECIFICATION filed by the said Dundas Smith Porteous at
the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 20th December 1855, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DUNDAS
SMITH PORTEOUS, of the Town of Paisley, in the County of Renfrew, Scot-
land, do hereby declare that the nature of my Invention for "REGULATING THE
PRESSURE OF GAS, STEAM, WATER, OR OTHER FLUIDS," and in what manner the
same is to be performed, to be particularly described and ascertained in and.
by the following statement thereof, that is to say :-
My pressure regulator, as used for gas, with water joint for the regulating.
cover. Figure 1 is a sectional elevation; and Figure 2, a sectional plan..
A, A, is an oblong square box, of a size varied to suit the quantity of gas.

page_text: wanted to be regulated in a given time. The box is filled with water to the
plug B. Inside the said box is placed an inverted box C, C, which oscillates
on the centre D. This inner box or cover dips as far into the water which
is in the outer box as forms a water joint to resist the pressure of gas inside
the said inner box, and also to allow of the travel of the valve E. F is the
inlet pipe passing through the end of box A, A, to which it is made water-
tight. The end of this pipe, which terminates in said box, rises above the
surface of the water inside the inner box C, C. On the mouth of said pipe
is placed the valve E, opening inward, attached to which is the short link
connecting the valve with the top of the inner box or cover C, C, as
shewn in Figure I. G is the discharge pipe passing through the end of the
box A, A, to which it is also made water-tight. The internal end of said
pipe rises above the surface of the water inside the inner box or cover C, C.
When the gas is wanted of a pressure less than the weight of cover or
inner box, valve, and connecting link, a weight is placed on the pin H to
counterpoise the same to the pressure wanted; but when gas is wanted of a
greater pressure than the weight of cover or inner box, valve, and connecting
link, weights to the amount required are put on the pin I.
Figure 3 is a front sectional elevation, and Figure 4 a plan, of my pressure
regulator when applied to gas. It has a flexible cover instead of a cover with
a water joint, as before described. The other parts are the same as Figures 1
and 2. The cover is made of india-rubber or any flexible material capable
of withstanding the pressure and the action of gas; but india-rubber, or a
combination of india-rubber with other substances, known by the name of
vulcanized india-rubber, I prefer. The mode of applying it is by casting an
inside flange round the mouth of the box A, A, Figure 3, and between that
flange and the separate flange J, I fasten by the pins K, K, K, the cover
or sheet of india-rubber or combination of india-rubber so firmly together as
to prevent the escape of the gas. In putting on the cover or sheet of india-
rubber or other flexible material, I make it bag in the centre, so far as to
allow it to move the full travel of the valve E. L is a metal plate on top of
the flexible cover, and oscillates on the centre D, and is attached to the valve
E by the link and a small eye and nut, binding the said 'metal plate and
flexible cover together, so that when the pressure of gas inside the box A, A,
acts upon the under 'surface of the flexible 'cover, it lifts the said metal plate, 3
and with it the valve E. When the gas is wanted of a pressure less than the
weight of said flexible cover, metal plate, valve, connecting link, and mounting,
weights are put upon the counterpoise pin H to reduce the same to the amount
wanted; but when the pressure wanted is of greater amount than the said
..

page_text: cover, plate, and valve, with mountings, weights must be put on the pin I to
increase the pressure to the required amount. Figure 5 is a sectional eleva-
tion; Figure 6 is a sectional view; and Figure 8, a plan of the same.
My Invention, when used for regulating the pressure of steam, water, or
other fluids, has a regulating cover of india-rubber, or a combination of india-
rubber with other substances, known as vulcanized india-rubber, which I prefer.
A, A, is a cylindrical box, of a size varied to suit the quantity of steam or
fluid to be regulated in a given time. On top of said box is cast an internal
flange. I bolt between it and an annular ring S the india-rubber cover T, so
that it may, form a steam-tight joint., F is the inlet pipe passing through the
box A, A, having a compensation valve seat affixed to the inner end of it. The
compensation valve is formed by connecting the internal valve E with the
external valve M, so that when the pressure of steam or fluids in the pipe
acts on the under side of the valve E, it is neutralized by the pressure on
the upper side of the valve M, the areas of both valves being the same. The
stud N, which binds the two valves together, has a broad head, into which
is screwed the connecting piece that connects the compensation valve
with the lever P. The said lever oscillates on the pin Q, so that by pressing
down the lever P it opens the compensation valve and admits steam or fluids
into the box A, A, until the pressure of such steam or fluid is of sufficient
strength as (by pressing on the disc R) to lift it, and through the connecting
piece lifts the lever P and shuts the compensating valve to the given amount
wanted, which is regulated by the weight on the lever P. G is the discharge
pipe, which can be either affixed to the bottom or side of box A, A.
Figure 7 is a sectional elevation of the same regulator, only instead of an
india-rubber regulating cover I use a thin metallic regulating cover. All the
other parts are the sanie as above described for Figures 5, 6, and 8, and I use
the same letters as in Figures 5, 6, and 8.

page_text: india-rubber, or a flexible metallic regulating cover, for the regulation of the
pressure of steam, water, and other fluids.
The parts which I claim separately I consider new, or that they are so to
the best of my knowledge and information. The other parts which I use in
combination are things in common use, and are found in many combinations
of mechanical apparatus.
In witness whereof, I, the said. Dundas Smith Porteous, have hereunto set
my hand and seal, this Seventeenth day of December, in the year
of our Lord One thousand eight hundred and fifty-five.
Witness,
DUNDAS SMITH PORTEOUS. (L.S.)
ROBERT GARDNER, Lithographer,
of the City of Glasgow & County of Lanark,
Scotland.