Improvements in Apparatus for Controlling and Regulating the Admission of Steam in Steam Engines.
Year: 1891

page_text: Date of Application, 9th Apr., 1891-Accepted, 9th May, 1891
COMPLETE SPECIFICATION.
Improvements in Apparatus for Controlling and Regulating the
Admission of Steam in Steam Engines.
A communication from abroad by GÉZA JALSOVICZKY, of Budapest, in the
Kingdom of Hungary, Professor.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster & 323 High Holborn, in the
County of Middlesex, Civil 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 adjustable double valve gear of steam engines enables variable quantities of
steam to be used and which are mostly regulated by the governor. Considerable
friction, however, results between the two valves, which the governor has to over-
come. The exactness of adjustment is thereby impaired and the governor cannot
work with the amount of sensitiveness necessary for the most economical con-
sumption of steam.
The governor-expansion valve forming the object of this invention is intended
to remove this disadvantage; it effects the distribution of the steam automatically
in place of the second valve and without offering an excessive resistance to the play
of the governor, and therefore without any friction worth mentioning.
Referring to the drawings:-
Figure shows a side view of the entire apparatus with valve box of steam
engine.
Figure 2 is a part section on the line of Figure 1, showing the cylindrical
valve hereinafter described with connections for working the same.
Figures 3, 4, 5 and 6 are views showing the manner in which the distribution of
the steam is regulated by the governor through the movement of the cylindrical
valve.
Figure 7 shows the attachment of the lever d², hereinafter referred to, to its
axle.
Figure 8 is a horizontal section on line ae of Figure 2.
Figure 9 is a horizontal section on line y y of Figure 2, showing the manner in
which the distribution of the steam takes place.
Similar letters of reference indicate similar parts throughout the Specification.
The distribution valve is indicated by t. On the valve box, the cast iron
cylinder is placed. They are connected together by the passage c. A metal
cylinder is inserted in the cylinder c. In this, the cylindrical valve or round
slide a moves, with, in this case, four rectangular three cornered openings a¹,
Figures 3-6, to which an equal number of openings in the cylinder b
correspond.
The cylindrical valve a is seated on the rod, which is placed in the holder e in
such a way that, although it revolves with it, it can move longitudinally therein.
This enables the provision of a slot in the rod and the corresponding spring on
the holder. Thus the valve a can be revolved by the holder e and also moved up
and down by the governor. For this latter purpose, the rod is connected with
the governor by means of the pin and the fork d, Figure 2. The fork is fastened
on the axis d which also carries the lever d², Figures 7 and 8. When this,
through the rod g, is actuated by the movement of the governor lever 1, the fork d
and with it the rod and the cylindrical valve a also receive a corresponding move-
ment. The fork lever d is secured on the axle d' by a clamp like device v. The

page_text: exact adjustment of the cylindrical valve a may be effected by loosening the
screw w.
The distribution takes place by the revolution of the cylindrical valve, steam
being admitted to the chamber of the valve t through the cylinder c attached to the
steam pipe, and the passage c', as soon as the openings a' of the cylindrical valve a
fit over the openings 6 of the inserted cylinder b. As in the example shown in
the drawing, there are four openings a and respectively, at each revolution of
the cylindrical valve the steam will be admitted four times, which corresponds to
two double strokes of the piston. Accordingly the engine must make two revolutions
during one revolution of the cylindrical valve a.
In order that this be effected accurately, the rod t¹, serving to actuate the dis-
tributing valvet as shown in Figure 1, is provided with the vertical rod m which
transmits, by means of the rod n, its movement to the crank k, see Figure 2.
The revolution of the crank is further transmitted by means of bevel wheels in
the cast iron case u to the governor and to the holder e in such a way that this
makes half as many revolutions as the crank. To overcome the dead points of the
crank, the crank axle is further preferably revolved by means of a belt pulleys, in
order to prevent any disturbances during its working by means of the rods mn.
The method and system of driving the governor do not affect the essence of the
invention, it can also be performed in any other suitable manner, for instance by
means of a chain and chain discs.
The arrangement shown in Figures 3 to 6 of the two cylinders a and b with the
openings a¹ and exhibit the manner in which the governor regulates the dis-
tribution through the movement of the cylindrical valve a.
Three positions of the motion of the same are taken being somewhat higher or
lower and which are distinguished respectively by 1, 2, and 3. In each position
views are given in Figures 3 to 6 which correspond to the movement of the valve u.
In position 1 of the valve, the pointed angles of the triangular openings come over
one another, and a shutting off is effected if the valve have been turned longi-
tudinally as is shown in position 5, where its course is designated by ¹. In
position 2, this shutting off is effected only after a longer course, and in position 3
the course is still longer.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
The improved apparatus for controlling and regulating the admission of steam in
steam engines, consisting of a distributing valve such as t and the cylindrical
valve a, the openings in which latter correspond with the openings of the cylinder b,
in combination with the governor gearing and the governor lever whereby the
valve is respectively revolved and also raised or lowered, the openings a and b
being made triangular and so placed against each other that the admission
way is longer or shorter according to the altitude of the cylindrical valve,
.all arranged substantially as hereinbefore described and shown.
Dated this 7th day of twil 1901
WM. P. THOMPSON & Co.,
Agents for the Applicant.