IMPROVE- MENTS IN GOVERNING OR REGULATING THE SPEED OF STEAM AND OTHER MOTIVE POWER ENGINES AND IN THE APPARATUS EMPLOYED FOR THIS PURPOSE
Year: 1885

page_text: ади vener motive rower engines, and m the Apparatus
Employed for this Purpose.
3
I JAMES GRAFTON JONES of 37 Stoke Newington Road in the County of
Middlesex Engineer do hereby declare the nature of my invention for "IMPROVE-
"
MENTS IN GOVERNING OR REGULATING THE SPEED OF STEAM AND OTHER MOTIVE
POWER ENGINES AND IN THE APPARATUS EMPLOYED FOR THIS PURPOSE
to be as
follows:-
.
This Invention relates to improvements in apparatus for governing or regulating
the speed of steam or other motive power engines of the character described in
the specification of Letters Patent granted to me dated 16th September 1880
N° 3769 in which advantage is taken of the varying velocity of the steam (or
other motive power fluid) in its passage through the steam pipe to the throttle or
other equivalent regulating valve and engine by means of apparatus arranged in
the steam pipe or passage such apparatus acting to open or close the throttle valve
or other regulating valve in accordance with the speed at which the engine is
required to run.
.
In practice these governors are found to act successfully when applied for
governing marine engines having equilibrium valves but when applied to stationary
engines when the throttle or other valve is just closing the pressure of the steam
on each side of the pendulum disc being nearly the same the sudden reaction of
the spring acts so quickly as to cause the engine to race to a limited extent.
Now in order to overcome the sudden reaction of the spring I employ an
equilibrium piston valve arranged in the valve box so as to act in combination
with the pendulum or suspended disc or plate.
For this purpose the stem of the piston valve passes through glands which serve
as guides in which it moves to and fro. The valves on the stem act as pistons
to open or close the steam passages which admit or cut off the steam to the engine.
The stem of the piston valve is advantageously formed hollow at each end the
pressure of the steam acting on a larger area at one end to close the valves a coiled
spring (capable of adjustment by means of a screw) being arranged to act in the
hollow at the opposite end so as to be slightly in excess of the equilibrium in order
to keep one arm of a lever which acts on the piston valve against the suspended

page_text: lever which carries a disc or surface upon which the velocity of the steam acts to
regulate the admission of steam to the engine.
Should the pressure of the steam decrease in the boiler the tension of the spring
remaining the same causes the valves to open automatically.
The piston valve is actuated by means of a cranked lever mounted within the
valve box or chamber. One arm of this lever is acted upon by the suspended
pendulum lever the forked end of the other arm embracing the stem of the piston
equilibrium valve to move it to and fro to open or close the valves.
Steam is admitted from the steam inlet chamber to each end of the stem of the
piston valve in any convenient manner. i.
The position of the pendulum lever is adjusted by means of a set screw.
In supplying governors of this character for different pressures of steam it has
been found necessary to enlarge the surface of the disc or plate carried by the
pendulum lever on which the steam impinges for low pressure and to decrease the
surface for high pressure which has caused difficulty and delay. In order to
facilitate the adjustment of the annular space around the disc or plate to suit the
pressure an adjustable slide curved on its upper surface and adjusted by a screw is
arranged so as to increase or diminish the area around the disc or plate for the
admission of steam and thereby diminish or increase the pressure of the steam
upon the disc or plate as required.
.
One end of the axis of the pendulum lever is supported in a recess in the box.or
chamber the other end of the axis passing out of the box to carry a pointer to
indicate upon a graduated scale the position of the piston valves.

page_text: ;
The piston valve is actuated by means of the cranked lever d mounted within
the valve box or chamber fupon the ends of the screw pins dx dx to form an axis
thereto. One arm & of this lever d is acted upon by the suspended pendulum
lever o the fork end of the other arm d¹ embracing the stem of the piston equili-
brium valve a to move it to and fro to open or close the valves.
Steam is admitted from the steam inlet f¹ and chamber fto each end of the stem
of the piston valve a in any, convenient manner.
The position of the pendulum lever e is adjusted by means of a set screw e*.
In supplying governors of this character for different pressures of steam it has
been found necessary to enlarge the surface of the disc or plate e¹ carried by the
pendulum lever e on which the steam impinges for low pressure and to decrease the
surface for high pressure which has caused difficulty and delay. In order to
facilitate the adjustment of the annular space around the disc or plate e¹ to suit the
various pressures an adjustable slide 9 curved on its upper surface and capable of
adjustment by means of the screw g¹ is arranged so as to increase or diminish the
area around the disc or plate c¹ for the admission of steam and thereby diminish or
increase the pressure of the steam upon the disc or plate c¹, as required.
One end of the axis e of the pendulum lever e is supported in a recess f₁ in the
box or chamber f the other end of the axis e², passing out of the box f to carry
a pointer to indicate upon a graduated scale h¹ the position of the piston
valves a³ a².
i is a pipe or passage to conduct steam pressure to the upper end of the steam of
the piston valve a¹ a screw i¹ (or it may be a cock) being inserted in the passage
to increase or diminish the size of the passage so as to regulate the reaction of the
spring c, as may be required and to retard the too quick opening of the valves.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1st The improved method of governing or regulating the speed of steam or other
motive power engines by means of the vibrating arm e e¹ acting by means of
the lever dd upon the equilibrium valve a a¹ a³ to open and close the steam
passages bb substantially in the manner and for the purpose herein before described
and represented in the drawings hereto annexed.
2nd I claim the improved form arrangement and application of the hollow
equilibrium valve pistons a a¹ a² arranged to act substantially in the manner and
for the purpose herein before described and represented in the drawings annexed.
3rd I claim the arrangement and application of the adjustable slide g so arranged
as to increase or diminish the area around the disc or plate e¹ for the admission of
steam and thereby diminish or increase the pressure of the steam upon the disc or
plate e¹ as may be required substantially in the manner hereinbefore described and
represented.in the drawings hereto annexed.
4th I claim the improved general arrangement combination and construction of
apparatus for governing and regulating the speed of steam and other motive power
engines by means of a vibrating arm combined with a hollow equilibrium piston
valve acting substantially in the manner and for the purpose herein before described
and represented in the drawings hereto annexed:
1000