Improvements in Mechanism for Operating Self-closing Lifting- valves.
Year: 1888

page_text: Date of Application, 1st Sept., 1888
Complete Specification Left, 29th May, 1889-Accepted, 13th July, 1889
PROVISIONAL SPECIFICATION.
Improvements in Mechanism for Operating Self-closing Lifting-
valves.
I, ERNST KÖRTING, of Celler Strasse 62 Hanover, kingdom of Prussia, Machine-
manufacturer, do hereby declare the nature of this invention to be as follows:-
My invention relates to the means for opening valves that close against their seat
by the pressure of a fluid, and it consists in the combination, with the valve and the
actuating part from which primarily the motion for opening the same is derived, of
a cam-surface, a counter-piece co-operating therewith and means for guiding the cam-
surface or the counter-piece or both, so that when the actuating part is moved, the
relative action of the cam-surface and the counter-piece will cause the valve to open.
By imparting to the cam-surface a suitable form, this mechanism allows of acting
upon the valve, at the time it is lifted from its seat, with a greater force than after
it has been raised sufficiently as that the pressure on both sides of the same is
equal.
The aforesaid cam-surface may consist in one side of a wedge connected to the
actuating part, and the counter-piece in a roller pivoted to the stem of the valve or
to a lever in connection therewitli; or the wedge is formed on both sides with cam-
surfaces and guided by a roller against which it bears with its back.
Another arrangement consists in the connection of the piece having the cam-
surface, and which may be a lever, to the valve-stem, and of the counter-piece,
which may again be a roller, to the actuating part, the counter-piece being guided
in a straight line or in a curve. If it is guided in a curve, for instance in a circle,
by means of a radius-rod, the cam-surface may be straight.
In a third arrangement the cam-surface is made a fixture and the counter-piece,
preferably always a roller carried by the actuating part, is connected by a link to the
valve-stem or to a lever combined therewith, so that when the counter-piece or roller
is moved from its normal position, it will, by sliding or rolling on the cam-surface,
exercise a pull upon the link and thus open the valve.
1
T
Anunt 1988
CARL PIEPER,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Mechanism for Operating Self-closing Lifting-
valves.
I, ERNST KÖRTING, of Hanover, kingdom of Prussia, Machine-manufacturer, 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 the means for opening lifting-valves that close against
their seat by the pressure of a fluid, and it consists in the combination, with the
valve and the actuating part from which the motion for opening the same is derived,
of a piece having a cam-surface, or a surface virtually operating as cam-surface, and
which piece I shall call the cam-piece, a counter-piece co-operating therewith, and
means for guiding the cam-piece and the counter-piece, or one of them, so that when
the actuating part. is moved, the relative motion of the cam-piece and the counter-
piece will cause the valve to open. By imparting to the cam-surface a suitable form,
or by suitably guiding the same or the counter-piece, this mechanism allows of acting

page_text: upon the valve, at the time it is lifted from its seat, with greater force than after it
has been raised sufficiently as that the pressure on both sides of the same is equal.
In the annexed drawing different arrangements of mechanism involving my
invention, are represented in combination with steam-traps.
According to fig. 1 the cam-piece consists in a wedge L, fixed by a rod B to the
pot A, constituting the float of the trap, and the counter-piece in a roller E, pivoted
to the lever F, which is connected to the water-eduction-valve I. The wedge bears
with its back against, and is guided by a roller D turning on a fixed pin. The
surface g of the wedge, or cam-surface, is made of such form that the portion thereof
being in contact with the roller E when the valve is closed, is less inclined to the
line of motion of the wedge than the remaining portion. At the beginning of its
motion the wedge will consequently operate to start the valve from its seat with
considerable power while subsequently the portion of the wedge having a surface of
greater incline, acts to open the valve quickly to the full extent of its lift. The cam-
surface may however also be made of uniform incline.
The float acts in the usual manner being caused to descend when a sufficient
quantity of water of condensation has accumulated in the apparatus to overflow
the edges of the float and fill it with water. The valve I being thereby opened as
herein before described the pressure of the steam drives out the water contained
in the float A which being thus relieved of its load rises and allows the valve to
close.
Figure 2 shows a mechanism which differs from the foregoing only in this respect
that the roller E is pivotted to the stem of the valve, and that both sides g and go of
the wedge form cam surfaces. The said stem is supported at its end by a suspension-
link and provided with a spring which assists in closing the valve.
In the arrangement represented by Figure 3 and which is an inversion of the one
shewn by Figure 1, the cam-piece consists in a lever L' pivotted at d and connected
to the valve by a link while the counter piece constituted by the roller E is pivottod
to the actuating part, i.c. to the rod B-the said rod being guided in a straight line
by the roller D and bar C. The cam-surface g is preferably formed in like manner
as described relatively to fig. 1; .e. so that the action of the mechanism on the
valve is at the outset more powerful than afterwards.
.
Fig. 4 shows a modification of the latter construction, in which the roller E is
guided by a radius-rod b, having its centre at a, while the bar B carrying the roller,
is jointed at its lower end to the float A. When the said float descends, the roller E,
moving in a circle, as shown by broken lines, will push the lever L' sideways with
the effect of opening the valve. It will readily be perceived that if, in this case, the
cam-surface which may be straight, is arranged to form nearly a right angle with
the rod b when the latter is in its uppermost position, this mechanism will also at
first act very powerfully on the valve and subsequently with increased speed and
reduced power.
In the mechanism constructed as shown by fig. 5, the cau-picce L² is a fixture,
and the counter-piece, consisting again in a roller E carried by the rod B, is connected
by the link b, the lever c and the link h¹ to the valve I.
C
When the roller E is moved downward, it will, by rolling on the surface g, operate
to shift the links and the lever into the position shown by broken lines, a pull being
thereby exercised on the valve; and, if the link is arranged to form in its normal
position nearly a right angle with the cam-surface g, the mechanism will operate on
the valve with like result as the foregoing dispositions. The link may, however, be
connected directly to the stem of the valve at f¹, provided this point be securely
guided in a straight line.
The mechanism represented by figs. 6 and 7 is substantially alike to that shown by
fig. 4; the difference consisting merely in the different relative arrangement of the
parts, as will be apparent from the drawing.
Although I prefer to use a roller as counter-piece, the same may be replaced by a
non-rotating part which slides on the cam-surface.

page_text: 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. The combination of the valve I, the actuating part B, the cam-piece or wedge L
connected to the part B, a counter-piece E connected to the valve I, and means for
guiding the pieces Land E, so that the cam-piece L on being moved, will operate on
the counter-piece E, substantially as described.
2. The combination of the valve 1, the actuating part B, the cam-piece L'
connected to the valve I, a counter-piece E connected to the part B, and means for
guiding the pieces L' and E, so that the counter-piece E on being moved, will
operate on the cam-piece I', substantially as described.
3. The combination of the valve I, the actuating part B, the fixed cain-piece L,
the counter-piece E carried by the part B and connected by a link & (with or without
intermediate parts) to the valve, so that when the piece E is moved along the
surface g of the piece L2, the link b will be inclined, substantially as specified.
Dated the Twenty-seventh day of May 1889.
CARL PIEPEK,
Agent for Applicant.