Year: 1887

page_text: Date of Application, 3rd Nov., 1887
Complete Specification Left, 3rd Aug., 1888
Complete Specification Accepted, 28th Sept., 1888
1 WILHELMUS JOHANNES HENDRICUS FRESEN, of Oude Molstraat No. 2, The
Hague, in the Kingdom of the Netherlands, Merchant, do hereby declare the nature
of this invention to be as follows
This invention has reference to an improved construction of governor or regulator
in which supply of motive fluid (for example steam) to an engine is controlled or
regulated by a valve or valves controlled by a piston acted upon by the fluid pressure
when there is a disturbance of equilibrium consequent upon change in its velocity or
flow.
Within a cylinder chamber or passage through which the steam (in the case of a
steam engine governor, which 1 select as an example) flows to the engine is fixed a
small cylinder containing a compound piston, on a rod connected to a valve or valves
(preferring an arrangement of equilibrium valves) whereby the flow of steam is con-
trolled. One part of the piston is fixed to the rod another part is a ring or perforated disc
able to slide lengthwise of the rod, and between the two paris a spring is interposed.
Assuming the axis of the piston to be vertical the fixed part is the lower, in the
arrangement I will now describe. When pressure is applied in a downward direction
to the upper or moveable part of the piston that part is caused to approach the fixed
part being allowed to do so by compression of the spring between them.
Packing or bearing pieces (conveniently two) are so arranged in recesses in the piston
as to bear against the interior of the small cylinder which is formed with tapered
grooves to receive them. There are inclined faces on the said packing or bearing
pieces and on the moveable upper part of the piston and the arrangement is such as
to keep the piston steady. When the pressure against the upper part of the piston
exceeds that against its lower part, the pressure of the bearing pieces against the
interior of the small cylinder is reduced.
The details can be modified so long as bearing pieces be caused to press against the
interior of the small cylinder and means be provided for reducing such pressure when

page_text: the pressure of fluid above the piston is greater than that below it as for example
when there is a tendency to "racing" of the engine. The upper end of the piston
rod may work in a glass tube or glazed chamber to indicate the action of the apparatus.
Means such as sliding blocks are provided for regulating by their adjustment the flow
of the steam past the small cylinder.
A spring is provided to support the piston rod & tends to counteract its downward
movement also there is on the piston rod a collar, and a spindle with a projection
protrudes into the main cylinder passage or chamber the arrangement being such that
the piston rod can be held out of action when required. There is provision for with-
drawing water of condensation.
" 1
W. J. H. FRESEN.
W. Lloyd Wise;
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: I, WILHELMUS JOHANNES HENDRICUS FRESEN, of Oude Malstraat No. 2 The
Hague in the Kingdom of the Netherlands, Merchant, 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 has reference to an improved construction of governor or regulator
in which supply of motive fluid (for example steam) to an engine is controlled or
regulated by a valve or valves controlled by a piston acted upon by the fluid pressure
when there is a disturbance of equilibrium consequent upon change in its velocity
or flow.
Within a cylinder, chamber, or passage, through which the steam (in the case of
a steam engine governor which I select as an example) flows to the engine is fixed
a small cylinder containing a compound piston on a rod connected to a valve or
valves (preferring an arrangement of equilibrium valves) whereby the flow of steam
is controlled. One part of the piston is fixed to the rod another part is a ring or
perforated disc able to slide lengthwise of the rod and between the two parts a
spring is interposed. Assuming the axis of the piston to be vertical the fixed part
is the lower in the arrangement. I will now describe. When pressure is applied
in a downward direction to the upper or moveable part of the piston that part is
caused to approach the fixed part being allowed to do so by compression of the spring
between them. Packing or bearing pieces (conveniently two) are so arranged in
recesses in the piston as to hear against the interior of the small cylinder which is
formed with tapered grooves to receive them. There are inclined faces on the said
packing or bearing pieces and on the moveable upper part of the piston and the
arrangement is such as to keep the piston steady. When the pressure against
the upper part of the piston exceeds that against its lower part the pressure of the
bearing pieces against the interior of the small cylinder is reduced. The details can
be modified so long as bearing pieces he caused to press against the interior of the
smali cylinder and means be provided for reducing such pressure when the pressure
of fluid above the piston is greater than that below it as for example when there is a
tendency to "racing" of the engine. The upper end of the piston rod may work in
a glass tube or glazed chamber to indicate the action of the apparatus. Means such
as sliding blocks are provided for regulating by their adjustment the flow of the
Steam past the small cylinder.
A spring is provided to support the piston rod; it tends to counteract its downward
movement also there is on the piston rod a collar, and a spindle with a projection
protrudes into the main cylinder, passage, or chamber, the arrangement being such
that the piston rod can be held out of action when required. There is provision for
withdrawing water of condensation.
In the accompanying 4 Sheets of illustrative drawing, Figures 1 and 2 are vertical
central Sections, taken in planes at right angles to each other; and Figure 3 a

page_text: horizontal Section in the line A B, Figure 1, of a governor constructed according to
this Invention for use with a fluid pressure Engine. Figures 4 to 7 are detail views
hereinafter referred to. Figure 8 illustrates a modified construction of the upper
part of the governor. Figures 4 to 9 are drawn to a larger scale than Figures
1, 2 and 3.
Referring to Figures 1 to 7;-1 is a cylindrical Chamber provided with inlet and
outlet passages 2 and 3 respectively for conveying motive fluid to the valve chest
of a fluid pressure Engine. 4 is a web or rib fixed in the chamber 1 and formed
with a small cylinder 5. Within this cylinder is arranged a compound piston
comprising a lower part 6 fixed to a valve rod 7, an upper ring or perforated disc 8,
arranged to slide on the rod and an intermediate spring 9. The parts 7 and 8 of this
compound piston are illustrated in side elevation in Figures 4 and 5, and in plan or
top view in Figures 6 and 7. 8" is a stop fixed on the valve rod 7 to limit the
upward movement of the ring or dise 8, due to the action of the spring 9. 10, 10
are packing or bearing pieces (hereinafter called bearing pieces) that arranged to
enter recesses in opposite edges of the parts 6 and 8 of the piston and to hear
against the inner ends of tapered grooves 11, formed in the Cylinder 5; they are
provided with projecting portions 12, having inclined surfaces, (Figures 1, 5 and 6),
the lower of which act against correspondingly inclined surfaces formed on the
upper part 8 of the piston. Those hearing-pieces serve to hold the piston and valve
rod steady when the rate of flow of Steam is constant. When the pressure of motive
fluid against the ring or disc 8 exceeds that against the lower part 6, the force of
the spring 9 on the ring 8, and consequently on the brake blocks is partly counter-
balanced and the pressure of the brake blocks against the interior of the cylinder 5
thereby reduced. 13 13 are two disc valves secured upon the valvo rod 7 and so
arranged in relation to the corresponding valve seats 14 as to constitute a double
beat or equilibrium valve as shown for controlling the passage of motive fluid from
the chamber 1 through the outlet 3 to the engine. The valve rod 7 is formed near its
lower end with a collar 15 that rests upon the upper end of a spiral spring 16. This
spring serves to support the weight of the valve rod and attached valves compound
piston and stop, and tends to counteract the downward movement of the rod.
a spindle that passes through a stuffing box at 18 into the interior of the chamber I
where it is provided with an arm or projection 19 that is adapted to take against the
under surface of a collar 20 on the valve rod and hold the piston out of action when
required as for example when starting the engine. 21 is a handle for operating the
spindle 17. 22, 22, are sliding blocks suitably guided and arranged to be operated so
that they may be caused to move to or from the chamber 5 as required for the purpose
of regulating the flow of the steam past the Chamber 5 by varying the cross sectional
area of the passages through which such steam passes on its way to the steam chest
of the engine.
17 is
24 is a glass tube enclosing the upper end of the valve rod and contained within a
cap or cover 25 formed with slots 26 through which the position of the valve rod can
be seen and the position of the compound piston and valves determined. 27 is a
screw threaded rod that is screwed through the upper end of the cap or cover; it
serves to limit the upward movement of the valve rod. 28 is a
pipe screwed into
the lower end of the chamber 1 and provided with a cock 29 for withdrawing water
of condensation when necessary.
With the arrangement described when the rate of flow of steam through the
chamber I is normal the pressure above and below the compound piston will be practi-
cally equal and the bearing pieces 10 will hold it and the equilibrium valve in the
proper position for admitting of the necessary amount of steam passing to the steam
chest of the engine. When however the rate of flow rises above the normal as for
instance when the slide or equivalent valve of the engine first places the engine
cylinder in communication with the steam chest or when the load upon the engine is
reduced the pressure of steam upon the upper side of the compound piston will be
greater than that upon its lower side and the pressure of the bearing pieces upon the
interior of the cylinder will consequently be reduced as hereinbefore mentioned.

page_text: The piston will then descend partly closing the equilibrium valve and diminishing
the supply of steam. When the rate of flow of steam falls below the normal, due
to a greater resistance or load being thrown on the engine and causing the piston
thereof to move slower the distribution of pressure on the two sides of the piston
will be varied; the piston 6-8 will then rise and open the equilibrium valve to a
greater extent and admit a larger quantity of steam. The upper part of the Governor
may if desired be constructed with a chamber 30 to hold lubricant and an inlet
passage 31 as shown in Figure 8, cocks 32 and 33 being provided to admit of the
lubricant being passed into the chamber 1 whilst the Governor is in use.
Having now described and particularly 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
First In a Governor or regulator of the kind in which supply of motive fluid
to an engine is regulated by a valve or valves controlled by a piston acted upon by
the fluid pressure when there is a disturbance of equilibrium consequent upon change
in its velocity or flow, providing the said piston with bearing pieces arranged to press
against the interior of the cylinder in which the piston works and with means for
reducing such pressure when the pressure of fluid above the piston is greater than
that below it substantially as herein described for the purpose specified.
:-
Second A Governor or regulator of the kind herein before referred to provided
with means whereby the piston and attached parts can be held out of action when
required, substantially as hereinbefore described.
Third The improved governor or regulator for fluid pressure engines, constructed
arranged and operating substantially as hereinbefore described with reference to and
shown in the drawings annexed whether provided or not with means for admitting
lubricant thereto.
01 1
1100
W. LLOYD WISE,
Per F. J. Brougham.