An Improved Governor for Steam Engines.
Year: 1891

page_text: Date of Application, 22nd Oct., 1891
Complete Specification Left, 22nd July, 1892-Accepted, 27th Aug., 1892
PROVISIONAL SPECIFICATION.
An Improved Governor for Steam Engines.
I, WILHELMUS JOANNES HENDRICUS FRESEN, of La Haye, in the Kingdom
of Holland, do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved governor comprising a body or casing made
in two pieces fitted one upon the other, one of the said pieces being provided with
a steam inlet and the other with a steam outlet; a rod carrying a piston and valves,
the said piston working in a cylinder, and the valves adapted to close certain
openings in the steam outlet; two sliding blocks operated by hand wheels so as to
open and close a space which exists between the cylinder and the inside of the
casing and a stop which by means of a handle can be brought into the path of
disc on the piston rod so as to render it immovable.
For high pressure engines I find it advantageous to place a spring above the
upper end of the piston rod for giving the required resistance to the motion of the
piston according to the condensation to be obtained.
With this construction, the stop being removed from the piston rod, if only a
small passage for the steam be left by the blocks the steam will press upon the
piston and cause it to descend together with the valves which will close the openings
in the steam outlet. The pressure being now in the lower part of the governor will
while diminishing the condensation in the upper part of the apparatus, act upon the
valves thus allowing the steam to pass out of the governor.
The manner in which the governor is regulated will be easily understood from the
following remarks:-
Supposing the steam pass into the governor with a pressure sufficient to give
120 revolutions to the engine and the work to be done only requires 100 revolutions
it is only necessary by means of the hand wheels and their respective blocks to
close the passages between the cylinder and the casing until the engine rotates at
the said speed.
If, on the other hand it is required to increase the speed of the engine, the blocks
are moved in the opposite direction.
Dated the cond drw of Ontahón 1901
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION..
An Improved Governor for Steam Engines.
I WILHELMUS JOANNES HENDRICUS FRESEN, of La Haye, in the Kingdom
of Holland, 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 an improved governor comprising a body or casing made
iu two pieces fitted one upon the other, one of the said pieces being provided with
a steam inlet and the other with a steam outlet; a rod carrying a piston and valves,
the said piston working in a cylinder, and the valves adapted to close certain
openings in the steam outlet; two sliding blocks operated by hand wheels so as to
open and close a space which exists between the cylinder and the inside of the
casing; and a stop which by means of a handle can be brought into the path of a
disc on the piston rod so as to render it immovable.

page_text: My improved valve can be employed either for high or low pressure engines, the
arrangement being such that the engineer in charge can by the slight modification
hereinafter described in a few minutes alter the governor to act from low to high
pressure.
In order to enable the invention to be fully 'understood I will describe the same
by reference to the accompanying drawing, in which,
Figure 1 is a vertical section of the improved governor in which the steam inlet
and outlet are arranged at right angles to each other.
Figure 2 is a vertical section of another arrangement in which the steam inlet
and outlet are superposed.
Figure 3 is an elevation of the upper part of the improved governor.
Figure 4 is a plan partly in section of the improved governor taken on the
line A B of Figure 2 but in which the steam inlets and outlets are arranged in
opposite directions to each other.
Figure 5 is a sectional plan taken on the line C D of Figure 1.
The body or casing of the governor is constructed of two superposed parts E F
fixed one upon the other by bolts and nuts h. The upper part E is provided with
a steam inlet G and the lower part F with a steam outlet H; at the centre of the
part F is fixed a block I of bronze or other suitable metal, the interior of which is
of cylindrical shape, and in which works a piston J mounted upon a rod K which
also carries a stop L and valves M, N of the steam outlet.
On either side of the block I are formed openings or passages O, P which can be
completely closed by blocks Q, R operated by screwed rods by means of hand
wheels ST the blocks being of the same shape as the exterior of the block I.
The lower end of the rod K is provided with a washer a butting against a helical
spring which acts as a buffer for the rod K.
The upper end of the rod K is provided with a disc c, in cases where it is desired
to work at high pressure. This disc continually receives a pressure such that it
compresses to a greater or less extent the helical spring U whereby the required
resistance is offered to the motion of the piston according to the reduction in
pressure to be obtained.
The lever d fixed to a cranked stop e, is shewn in Figure 1 in which the governor
is in its working position, on the lever d being lowered the crank e is raised and by
means of the disc stop L renders the rod K immovable.
The cap V of the governor is surmounted by a lantern which allows of the
movement of the end of the rod K being inspected and is adapted internally to
receive the helical spring U above described. This lantern is hermetically closed
at its upper part by a screw-cap X.
At the base of the part F of the governor is arranged a nut ƒ which is hollowed
out to form a chamber to receive the helical spring b and to act as a guide for the
rod K. The lower part of the chamber is of a smaller diameter and leads to a
cock g for the discharge of the water of condensation. -
The operation of the governor is as follows:-
The cranked stop being lowered as shewn in Figure 1 the rod K is free to move.
If only a small passage is left for the steam, by operating the sliding blocks Q, R,
and steam is caused to enter through the inlet G. this steam being unable to pass
with sufficient quickness through the openings O, P will force down the piston J
which, together with the valves M N, will descend and close openings m, 'n in the
steam outlet.
The pressure being then exerted in the lower part F of the governor whilst
diminishing the pressure in the part E will act upon the valve N and also on the
valve M allowing the steam to escape through the outlet H.
To put the governor in operation the steam inlet is gradually opened.
Supposing the steam passes to the governor with a pressure sufficient to give,
for example, 120 revolutions to the engine and the work to be done only requires
100 revolutions it is only necessary by means of the hand wheels S. T. and their
respective blocks to close the openings O. P. until the machine only makes the

page_text: number of revolutions required. Should it be required to increase the speed of
the engine the blocks are moved in the opposite direction.
From the foregoing description of the governor and the method of regulating it,
t will be seen that the pressure beneath the piston is always in a direct ratio to the
resistance met by the steam in its passage to the engine, for this pressure is in
inverse ratio to the speed of the current of steam and this speed is also in inverse
ratio to the resistance.
It will thus be seen that the steam passages Q R will be opened and closed by
means of the blocks O. P. according to the number of revolutions required to be
made and when it is desired to make use of the governor for machines working at
high pressure the helical spring U above described should be employed whilst for
machines working at low pressure it can be dispensed with.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1). A steam engine governor characterized by
(1) A body or casing made in two superposed parts, one being provided with a
steam inlet and the other with a steam outlet.
(2) A piston rod and valves in combination with a cylinder and discharge
openings.
(3) The use of two movable blocks operated by two hand wheels in com-.
bination with the external lateral walls of the cylinder.
The combination of a stop piece with a stop disc and piston rod.
The employment with high pressure engines of a spiral spring above the
upper part of the piston rod in combination with the resistance to be obtained
with the piston.
(2). The combination of parts forming the improved governor for steam engines
hereinbefore described and illustrated in the accompanying drawing.
Dated the 22nd day of July 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.