Improvements in the Method of and in Apparatus for Governing the Speed of Steam and other Fluid Pressure Engines.
Year: 1896

page_text: Date of Application, 2nd June, 1896
Complete Specification Left, 2nd Mar., 1897-Accepted, 8th May, 1897
Improvements in the Method of and in Apparatus for Governing the
Speed of Steam and other Fluid Pressure Engines.
1, JOHN WILLIAM MELLING, of 82 Swinley Road, Wigan in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in the method of and in apparatus for
governing the speed of steam and other fluid pressure engines and is particularly
applicable to marine engines.
In applying my invention to a marine or other engine fitted with two or more
cylinders I apply to the inlet passage of each cylinder a throttle valve in order to
control the inlet of the steam to each cylinder, these throttle valves being all
actuated simultaneously from the governor assisted preferably by an auxiliary
cylinder or cylinders, such as described in Letters Patent granted to me on
the 10th March 1891 and numbered 4219. Any increase of speed imparted to the
engine acting upon the governor causes it by suitable connections to open the steam
and water admission and emission valves, where the auxiliary cylinders are employed;
the movement of the cross head of the auxiliary cylinders moves and closes or
partially closes all the throttle valves simultaneously and therefore effectually checks
the tendency of the engine to race. If liquid under sufficient pressure be available
the steam or other fluid power auxiliary cylinders may be dispensed with and a single
cylinder be employed.
As a modification the governing mechanism may be arranged to control the
throttle, or cut off valve or valves, of the first cylinder or cylinders of the series in
the ordinary manner and only operate the throttle valves of the succeeding cylinders
when the speed of the engine is getting too high.
Dated this 1st day of June 1896.
H. B. BARLOW & GILLETT,
Agents for Applicant.
Improvements in the Method of and in Apparatus for Governing the
Speed of Steam and other Fluid Pressure Engines.
I, JOHN WILLIAM MELLING, of 82 Swinley Road, Wigan, in the County of
Lancaster, 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 :-
My invention relates to improvements in the method of and in apparatus for
governing the speed of steam and other fluid pressure engines and is particularly
applicable to marine engines.
In applying my invention to a marine or other engine fitted with two or more
cylinders, in one arrangement I apply to the inlet passage of each cylinder a throttle
valve in order to control the inlet of the steam to each cylinder, these throttle valves

page_text: being all actuated simultaneously from the governor assisted preferably by an
auxiliary cylinder or cylinders, such as described in Letters Patent granted to me
on the 10th March 1891 and numbered 4219. Any increase of speed imparted to
the engine acting upon the governor causes it by suitable connections to open the
steam and water adinission and emission valves of the auxiliary cylinders; the
movement of the cross head of the auxiliary cylinders moves and closes or partially
closes all the throttle valves simultaneously and therefore effectually checks the
tendency of the engine to race. If liquid under sufficient pressure be available the
steam or other fluid power auxiliary cylinders may be dispensed with and a single
cylinder be employed the governor in this case actuating the valves of the cylinder
aud the corresponding movement of the piston controls the position of all the
throttle valves.
As a modification the governing mechanism may be arranged to control a cut off
valve or valves, of the first cylinder or cylinders of the series in the ordinary
manner and only operate the throttle valves of the succeeding cylinders when the
speed of the engine is getting too high.
In the accompanying sheet of drawings-
Fig. 1 is a side elevation of a triple expansion marine or other engine to which
my improvements are applied and Fig. 2 is a plan of the same.
In the drawing, a designates the high pressure cylinder, the seonal and ethe
third steam cylinder supported on frames a b' c, d is the governor driven in any
convenient manner, not shown, from the engine, the governor rod is connected by
an elbow lever e and a rod f to an arm g pivoted to a rod h; pivoted to the arm g
is a rod i which controls the movement of the valves of the auxiliary cylinders;
and k of which the former is a steam and the latter a liquid cylinder; the operation
of these cylinders is described in the Specification to my aforesaid Patent No. 4219
of 1891. The rod & is connected to the cross head of the auxiliary cylinders
and to an elbow lever which is connected to a rod m made in several parts, to
which is connected levers n, o, p, secured to the spindles of throttle valves n', o, p,
for controlling the admission of steam to the cylinders a, b, c the throttle valves o¹, p,
and a valve ' to which the elbow lever is pivoted also serve to check the emission
of steam from all the cylinders and in this manner when the engine begins to race
and the governor balls By outward, the rod is drawn down by the lever e, and the
rod i actuates the valves of the cylinders j and k, and moves their piston rod and
the rod which moves the elbow lever I and the rod m whereby all the throttle
valves n', o, and 9' are moved simultaneously and the admission of stean is
checked to every cylinder at the same moment.
All the changes of speed of the engine are communicated to the governor aud
from it through the connections to the auxiliary cylinders ; and up to the rod m
which controls the movement of the throttle valves simultaneously.
In place of the auxiliary cylinders described a single cylinder if supplied with
liquid under sufficient pressure could be employed.
In cases where expansion valves are fitted to the first or high pressure cylinder,
or cylinders where more than one high pressure cylinder is employed, the expansion
valve or valves may be connected to and their position controlled by the rod mor
its equivalent, the throttle valves being coupled or connected to the rod m as before
described.
In place of controlling the admission and emission of steam to all the cylinders
simultaneously I might control some of the cylinders only.
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 :-
In a steam or other fluid pressure engine-
1. Controlling the admission and emission of steam or other fluid into each
cylinder simultaneously by means of a governor assisted by an auxiliary cylinder or
cylinders, or their equivalent substantially as described.

page_text: 2. In an engine fitted with more than two cylinders, controlling the admission
and emission of steam or other fluid into some or all of the cylinders simultaneously
by means of a governor assisted by an auxiliary cylinder or cylinders or their
equivalent substantially as described.
3. The general construction combination and arrangement of parts embodying my
improvements for governing the speed of steam and other fluid pressure engines
substantially as shown and described.
Dated this 1st day of March 1897.
H. B. BARLOW & GILLETT,
17 St. Ann's Square, Manchester, Agents for Applicant.