Improved Governing and Regulating Valve for Steam Engines.
Year: 1898

page_text: Date of Application, 7th Nov., 1898-Accepted, 7th Jan., 1899
COMPLETE SPECIFICATION.
Improved Governing and Regulating Valve for Steam Engines.
I, WILHELMUS JOHANNES 'HENDRICUS FRESEN, of 23, Place de la Duchesse,
Brussels in the Kingdom of Belgium, 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:-
The object of the present invention has relation to the securing of the uniform
operation of steam engines by means of a regulating valve, which valve is charac-
terised essentially by the use of the alterations in the speed of the steam current
which occur during the working for the immediate actuation of a regulating
valve inserted in the steam pipe connecting the boiler with the steam inlet
valve, in contradistinction to the governor ball-regulators which effect the control
of such valves or of the main slide valve itself only through the resulting
alteration in speed of the machine by means of mechanical transmission. A
regulator of this kind actuated automatically directly by the steam current is
illustrated in the accompanying drawing by way of example in one modification.
Figure 1 shows a side view of the regulator cover.
Figure 2 a vertical section of the regulator.
Figure 3 a horizontal section above the regulating piston, and
Figure 4 a partial section at right angles to Figure 2.
The cover which according to the illustration is inserted vertically in the
steam pipe consists of two divisions B B of which the upper division B connects
by means of the tubular support A to the part of the steam pipe coming from
the boiler, and the lower division B connects by means of the part S to the
tube proceeding to the slide valves. Between the two divisions are placed two
annular discs P P closing tightly upon one another, of which the lower one
is fixed and provided at its centre with a sleeve or cylinder G upon which the
upper revoluble disc is guided. The surface of both discs is broken through by
a given number of radially placed openings, and these latter can be adjusted so
as to make larger or smaller openings by corresponding displacement of the
discs. The turning of the upper disc is effected by means of the piece s engaging
in the toothing e the axis thereof which bears on the outside the crank handle M
is rendered steam tight by the stuffing box b. The piston P works in the
cylinder C which is open at both ends. This piston stands normally at the upper
end of the cylinder and is so tightly inserted that the weight will not without
further force push the piston rod T as well as the valves S1 S2 connected with it
out of this normal position. The valves S1 S2 are devised to shut off more or
less the openings beneath them in the walls of the inner cover 12 which cover
forms a continuation of the connecting piece S. The piston rod T is guided
above and below in bearings C¹ C, and the same rests at the lower end upon a
little disc r covering the spring R, and can further be brought into contact with
the head of the bar regulated from the outside. Any condensed water can
he let off through the channel / closed by a screw plug. The device is operated
as follows:-

page_text: The steam inlets of the annular dises P1 P2 are arranged for the normal working
of the machine and as long as this continues unchanged no part of the regulator
alters its position.
If on the contrary the speed increases, then the steam passes out of S very
quickly and consequently Hows in more quickly through A consequently the
piston P receives a strong impulse in proportion to the speed of the steam where-
by the said piston is depressed in the cylinder C and the valves S1 S2 approach
the openings in the cover B2 and the escaping steam is thereby checked. Here-
upon occurs moreover through the sudden collecting of the steam in B¹ B2 a
certain resistance, which again impels the piston P with the valves S¹ S² upwards
until the equilibrium is fully restored. In the case of too sudden or too far
a sinking of the piston P the piston rod strikes upon the little disc r and the
same is again raised by the spring R which latter also prevents the valves from
sticking fast upon the sides of B. If, however, such a sticking fast should
occur in spite of the spring R the piston and the, valves can be again raised by
means of the outside bar t
"
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:-
Steam flow regulator for steam engines characterized by the connecting of
the regulating valves S1 S2 of the valve housing inserted in the steam tube with
the piston P placed in the open cylinder G secured to the said housing, which
piston stands under the pressure of the steam passing through, and adjusts itself
correspondingly to the speed of the passage of the steam and thereby influences
by means of the valves the amount of steam flowing through, whereby the bar T
connecting the piston with the valve discs encounters a spring stop R for the
purpose of preventing the complete shutting off of the steam.
T
AL
1000
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C.,
Patent Agents for the Applicant.