Year: 1897

page_text: I, JAMES MILNE, Milton House Works, Edinburgh, Engineer, do hereby declare
the nature of this invention to be as follows:-
The constructing of station gas governors in such a form that the various
working parts are rendered much more accessible for examination or repair than
is the ease with those presently in use.
My invention consists in forming a station gas governor with two regulating
cones or valves, both actuated by one bell placed in a tank above and midway
between the cones and supported by means of rods, wires, chains or bands pass-
ing over pulleys, or attached to levers suitably fitted above bell and sealed against
gas escape by an ordinary form of waterslide joint.
The interior of the bell or gasholder is connected with the gas at outlet of
governor by means of a small pipe, and thus actuated by any change of pressure.
The cones are both inverted when fitted in governor. The interior of the body
of governor is divided, so that the gas passing one cone is flowing upward, while
the gas passing the other cone is flowing downward. By this means any fluc-
tuation of pressure is compensated.
With a governor constructed in the manner above described, the bell or gas-
holder can be removed for examination or repair without shutting the gas off
the governor, as the chains or rods supporting the cones only require to be fixed
up to throw the governor out of action. A stopcock on pipe, connecting the outlet
pressure to bell shut and the gasholder, can be removed. The cones can be re-
moved and the valve seats exposed for examination in a few minutes without the
trouble of lifting the bell, by simply shutting off the gas from the governor and
removing the small plates which carry the waterslide joint above the cones.
Dated this Eighth day of October 1897.
I, JAMES MILNE, Engineer, Milton House Works, Edinburgh, do hereby declare
o 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 object of my invention is the construction of a station gas governor in such

page_text: a manner as to give increased facility for examination and repair of the working
parts.
(1) The interior of the body of the governor is divided by two cross walls into
three chambers, the middle one of which is subdivided into two by a longitudinal
wall. Each of the two end chambers is subdivided into two by a horizontal wall,
having an opening which forms a valve seat. The gas enters through a suitable
opening in the side of the body into one of the subdivisions of the centre chamber
and from thence passes into the upper subdivision of one end chamber and simul-
taneously into the lower subdivision of the other through openings in the cross
walls. The gas then passes through the valves into the lower end chamber and
upper end chamber respectively, and thence through suitable openings into the
other subdivision of the central chamber, and is conveyed thence by the
ordinary main pipes. The valves, which may be of any convenient type, are
arranged to close on being lowered and to open on being raised. They are sup-
ported by means of rods, wires, chains or bands passing over pulleys or attached
to levers, such rods, wires, chains or bands being carried from the valve to the
pulley or lever through an ordinary water-slide chamber, while their opposite
ends, after passing over the pulley or a separate rod, wire, chain or band con-
nected to the opposite end of the lever, are attached to the top of a bell placed
in a tank situated above the body of the governor. This bell, being connected.
with the gas at the outlet of the governor by a small pipe with a convenient
stopcock, is subjected to the various changes of outlet pressure and rises or falls
in accordance therewith, sealed by a quantity of water placed in the tank. The
ascent of the bell lowers the valves, and. its descent raises them, thus decreasing
or increasing the apertures through which the gas passes.
The effect of the arrangement of the valves above described in conjunction with
the manner of admitting the gas simultaneously to the lower subdivision of one
end chamber and the upper subdivision of the other is such that, whatever may
be the suddenness or extent of any fluctuations in the inlet pressure, the valves
are maintained in equilibrium, the gas tending equally to open the one and close
the other.
The water-slide chambers are fixed in each case on the top of the upper end
chamber, which consists of a plate or plates so fixed as to be easily detachable
by the undoing of a few bolts, when they can be removed along with the water-
slide chambers and the valves thus laid open for cleaning or repair, without the
necessity of removing the bell or tank, while, on the other hand, the bell and tank
may be removed, without shutting off the gas, by closing the stopcock leading to
the bell and fastening up the valves so as to throw the governor out of action.
(2) Alternatively I make the governor with the usual cone seat and cone, with
its apex downwards pendant from the lever or pulley and connected therewith,
from the ordinary water-slide chamber, by a rod, wire, chain or band. The tank
and bell, instead of being placed immediately over the cone as in the ordinary
form of governor, is placed to one side, and the bell is connected by means of a
rod, wire, chain or band to the opposite end of the lever or wheel to which the
cone is attached. Inside the bell, and fastened to the crown thereof, is a compen-
sating chamber open at the bottom, having its sides parallel to those of the bell
and its area equal to that of the opening in the valve seat. The gas is admitted
from the inlet side of the governor to the inside of this chamber by a tube rising
above the water-line, and a pipe is carried between the outer side of the bell and
the outlet side of the governor by which the outlet pressure is brought to bear
upon the under side of the bell. Each of these two pipes is fitted with a con-
veniently accessible stopcock.
The effect of the arrangement of the cone valve above described in conjunction
with the arrangement for admitting the gas simultaneously to the small chamber
of the bell and the under side of the cone is such, that whatever may be the
suddenness or extent of any fluctuation in the inlet pressure, the valve is main-

page_text: tained in equilibrium-the gas tending equally to raise the bell on one side and
thus depress the cone, and to raise it by its direct action.
The water-slide chamber is fixed on the top of the valve chamber, which top
consists of a plate or plates so fixed as to be easily detachable by the undoing of
a few bolts, when they can be removed along with the water-slide chamber and
the valve thus laid open for cleaning or repair, without the necessity of removing
the bell or tank, while, on the other hand, the bell and tank may be removed
without shutting off the gas by closing the stopcocks leading to the bell and
closing down the valve so as to throw the governor out of action.
In the drawing, Figures 1 and 2 show the arrangement of the governor as
in (1). A is the body of the governor, BB the two end chambers, CC the valve
seats; DD the rods, wires, chains or bands passing over pulleys or levers EE.
FF are the water-slide chambers attached to the top of the bell G. HH are the
tops of the valve chambers, which are easily removed by undoing a few bolts so
that the valves may be removed for cleaning or repair. II the pipe leading
from the outlet pressure to the bell, K the stopcock to shut gas off the bell.
Figure 3 shows the governor as in (2). A A is the body of the governor. C is
the valve seat. D the rod, wire, chain or band, E the lever or pulley; F is the
water-slide chamber; G the bell. H is the top of the valve chamber which can
be easily removed by the undoing of the bolts. I is the pipe leading from outlet
pressure to bell. is the pipe leading from inlet pressure to compensating
chamber inside the bell. KK the stopcocks for shutting off the gas. Ļ the com-
pensating chamber inside the bell.
Having now particularly described and ascertained the nature of my said
invention, and the manner in which the same is to be performed, I declare that
what I claim is :-
(1) In station gas governors the placing of the valve or valves outside the
radius of the bell tank; so that the valve chamber or chambers can be opened
from above without moving the bell tank; substantially as described in the fore-
going specification and illustrated in the accompanying drawings.
(2) My hereinabove described apparatus forming a station gas governor, all
substantially as and for the purposes hereinbefore set forth and illustrated in the
annexed drawings.