Improvements in Governing Steam Engines, Explosion Motors, and the like.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Governing Steam Engines, Explosion Motors, and
the like.
I, FREDERICK RICHARD SIMMS, of Amberley House, 12, Norfolk Street, Strand, in
the County of London, Engineer, do hereby declare the nature of this invention to be
as follows:-
This invention relates to novel means for governing steam engines, explosion
motors and the like.
According to my invention instead of employing a centrifugal device actuated by
the crank-shaft of the engine or motor I provide a fan so mounted on a spindle
driven from the engine or motor that it revolves with the said spindle but is at the
same time free to move axially on the same. The boss of the fan is grooved and one
end of a lever, which controls the admission of steam, vapour or air to the engine or
motor or the exhaust of the said engine or motor, engages in the said groove. The
lever is provided with a spring the tension of which may be adjustable and which
exactly counterbalances the tendency of the fan to move axially on the spindle when
the latter is revolving at normal velocity.
With this arrangement it will be obvious that, when the velocity of the spindle
rises above or falls below the normal, the fan moves axially on the spindle thus
regulating the supply of steam, vapour or air to the engine or motor or the exhaust
of the same through the medium of the lever.
1005
Improvements in Governing Steam Engines, Explosion motors, and
the like.
I, FREDERICK RICHARD SIMMS, of Amberley House, 12, Norfolk Street, Strand, in the
County of London, 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 :-
This invention relates to novel means for governing steam engines, explosion

page_text: fro:n the engine or motor that it revolves with the said spindle but is at the same
time free to move axially on the same. The boss of the fan is grooved and one end
of a lever, which controls the admission of steam, vapour or air to the engine or
motor or the exhaust of the said engine or motor, engages in the said groove.
The lever is provided with a spring the tension of which may be adjustable and
which exactly counterbalances the tendency of the fan to move axially on the spindle
when the latter is revolving at normal velocity.
To enable my invention to be fully understood I will describe it by reference to the
accompanying drawing, in which :-
Figure 1 is a side elevation of an explosion motor having my governing fan applied
thereto the said fan controlling the exhaust; and,
Figure 2 is a similar view but shewing the fan arranged to control the admission
of the motive fluid.
A is the cylinder of the engine. a is my fan and b is the spindle upon which the
said fan is keyed in such a manner that it can move axially thereon, the said spindle
being mounted in the end of the cylinder A. The fan a is driven by a pulley c
mounted upon the spindle b the said pulley being rotated preferably from the crank
shaft of the motor by means of the cord or belt d.
e is the boss of the fan a, the said boss being provided with a groove e¹ in which
engages the forked end f' of a lever f.
In the arrangement shewn in Figure 1 the said lever f is pivoted at g to a bracket h
upon the cylinder A; the other end f2 of the said lever f being connected by means
of a rod i to a lever j which controls the exhaust from the engine. The said end f
of the lever f is [movable upon the rod i and is held against an adjustable nut k
upon the screw-threaded end of the said rod i by a spring abutting at its other end
against a stop m fixed upon the said rod, the spring being used to lessen the jar on
the spindle and lever.
n is the spring connecting the lever f to the cylinder A; by means of the nut o
the pressure exerted by the said spring m can be so adjusted that it exactly
counterbalances the tendency of the fan a to move axially upon the spindle b when
the said spindle is rotating at normal velocity.
.
In the arrangement illustrated in Figure 2 the lever f instead of controlling the
exhaust from the engine or motor controls the admission of the motive fluid thereto.
For this purpose the end f2 of the lever is keyed to a spindle p which controls the
admission valve for the motive fluid which enters in the direction of the arrow.
With this arrangement it will be obvious that, when the velocity of the spindle b
rises above or falls below the normal, the fan a moves axially on the spindle thus
regulating the supply of steam, vapour or air to the engine or motor or the exhaust
of the same through the medium of the lever.
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
1. In steam and explosion engines or motors the employment of a fan driven
by the engine or motor for governing the speed of the latter, substantially as
herein before described.
2. In steam and explosion engines or motors the employment of a fan mounted
so that it can move axially upon a spindle driven by the motor, and connected by
suitable means with the admission or exhaust valve of the motor in such a manner
that its axial movement controls the said valve, substantially as herein before
described.
3. In steam and explosion engines or motors the employment of a fan mounted
so as to move axially upon a spindle rotated by the said motor, and connected,
through the medium of suitable levers or rods, with the exhaust or admission valve
of the engine and of means whereby the tendency of the fan to move axially upon
the spindle when rotating at normal velocity is counterbalanced, substantially as
hereinbefore described.

page_text: 4. The combination and arrangement of parts formning the improved governing
mechanism for steam and explosion engines or motors, hereinbefore described and
illustrated respectively in Figures 1 and 2 of the accompanying drawing.
Dated this 15th day of December 1897.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.