Improvements in Valves for Pumps.
Year: 1891

page_text: Date of Application, 26th Mar., 1891
Complete Specification Left, 23rd Dec., 1891-Accepted, 12th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pumps.
I, ALOIS RIEDLER of 78 Friedrich Strasse, Berlin in the Empire of Germany,
Professor, do hereby declare the nature of this invention to be as follows :—
The object of the present invention is to provide an easy working valve for
pumps which will not be liable to breakage if inaccurately adjusted.
In applying the invention to a double-seated ring valve working on a central
spindle, the valve is made in two parts, with a spring between them, so that when
the valve is open and pressure is applied on the back thereof, the spring is first
of all compressed between the two parts, and afterwards the pressure being
continued assists to force the valve down upon its seat, as soon as the compression
of the spring is sufficient to overcome the counter resistance of the water passing
the valve. The spring further serves as a relief when the pressure of the valve
gear upon the back of the valve is continued longer than would be safe under
ordinary circumstances, and thereby prevents jamming or breakage.
The valve rises from its seat automatically as soon as the pressure of the valve
gear on the back thereof is removed. The gear consists of a tappet mounted on a
rock shaft extending across the valve chest, and operated in any suitable manner
in time with the strokes of the pump piston, so as to lift the tappet from or press it
onto the spring-supported back of the valve.
In valves thus arranged with a spring between the gear and the valve, the said
spring, when the gear is withdrawn at the beginning of one stroke of the piston,
does not exercise any pressure on the valve, but at the end of the piston stroke,
the return motion of the gear produces, according to the degree of resistance in the
valve, a compression of the spring, which, when sufficiently compressed to overcome
the resistance, transmits elastically the power of the gear to the valve, and closes
it. A certain degree of elasticity, however, still remains in the spring, to provide
against jar and breakage, should the pressure of the valve gear, owing to inaccurate
adjustment, be too long continued against the valve.
Dated this 26th day of March 1891.
NEWTON & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Valves for Pumps.
I ALOIS RIEDLER, of 78 Friedrich Strasse, Berlin, in the Empire of Germany,
Professor, 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 is to provide an easy working valve for
pumps, which will not be liable to breakage if inaccurately adjusted.
In applying the invention to a double-seated ring-valve working on a central
spindle, the valve is made in two parts, with a spring between them, so that when
the valve is open, and pressure is applied on the back thereof; the spring is first
of all compressed between the two parts, and afterwards, the pressure, being
continued, assists to force the valve down upon its seat, as soon as the compression
of the spring is sufficient to overcome the counter resistance of the water passing
the valve. The spring further serves as a relief when the pressure of the valve
TD 27

page_text: gear upon the back of the valve is continued longer than would be safe under
ordinary circumstances, and thereby prevents jamming or breakage.
The valve rises from its seat automatically as soon as the pressure of the valve
gear on the back thereof is removed. The gear consists of a tappet mounted on a
rock shaft extending across the valve chest, and operated in any suitable manner,
in time with the strokes of the pump piston, so as to lift the tappet from, or press
it onto the spring-supported back of the valve.
In valves thus arranged with a spring between the gear and the valve, the said
spring, when the gear is withdrawn at the beginning of one stroke of the piston,
does not exercise any pressure on the valve, but at the end of the piston stroke, the
return motion of the gear produces, according to the degree of resistance in the
valve, a compression of the spring, which, when sufficiently compressed to over-
come the resistance, transmits elastically the power of the gear to the valve, and
closes it. A certain degree of elasticity, however, still remains in the spring, to
provide against jar and breakage, should the pressure of the valve gear, owing to
inaccurate adjustment, be too long continued against the valve.
In the accompanying drawings,
Fig. 1 shews in vertical section, and
Fig. 2 in elevation, a force pump.
s is the suction valve, d the force valve, p the pump piston or plunger. The
valves are provided with a valve gear, shewn in Figs. 1 and 2 as applied to the
suction valve. The same arrangement can be adapted to the force or delivery
valve, as herein described for the suction valve. The valves shewn in the present
instance are double-seated ring valves, which work on a central spindle a.
the valve lies the tappet b, mounted on a cross shaft w, passing through the valve
chest, and operated by the rocking arm h, also mounted on the same shaft, but
outside the valve chest, to which arm the external gear is connected.
Over
On the rise of the tappet b, the valve s opens automatically, independent alike of
the valve gear and of the pressure spring f, whereas, on the descent of the tappet b,
the valve will be closed thereby. The spring fis interposed between the valve
and tappet, and while the gear does not move, the valve is free to expand, so that
it is either free from compression, or is limited by a collar n Fig. 4 which prevents
its flying off the spindle entirely.
In either case, the spring is inoperative as regards the opening and closing of the
valve.
So soon as the closing of the valve, through the external gear tappet b, takes
place (tappet b descending), the valves will not be directly closed by means of
the tappet b, but the spring of will first be compressed to an extent corresponding
to the resistance of the valve, and then the valve will be closed, partly by
the continued motion of the gear, and partly by the "spring power
"of the
spring f.
The external gear has also, for one of its duties, to develope the spring power
which co-operates in the closing of the valve.
The spring can either be mounted directly over the valve, if desired, or out-
side the valve chest, and between the driving gear and the transmitting lever h,
Fig. 2. Also, it can be adjusted beforehand to a determined amount of compression,
by, say, a nut m (Fig. 4), so that the spring will be compressed only when the
resistance of the valve overcomes that of the spring, whereupon the same action
takes place as heretofore described.
According to the arrangement above described, any desired driving gear for
actuating the valves may be used, as its only functions are to lift the tappet b, so
as to allow the valve s to open automatically, and before the next stroke of the
plunger to close the valve in concert wth the spring f, as above described.
In Fig. 2, the means shewn consist of an excentric disc c, which, through a
friction bowler, drives the rocking arm h, which, as before described, actuates the
valve.
In Figure 3, the form of the cam is shewn. This cam must be so timed to the

page_text: travel of the valve, that the "closing curve "ends sharp at b, and that the bowler,
after passing that point, remains stationary, while the concentric portion be of the
cam travels past it.
For the present pump gear, however, the portion ab of the cam may be formed
as shewn at a, d, b, and during the rotation from d to b, the compression of the spring
will take place.
The valve gear need not remain stationary at b, on the change of stroke of the
piston, i.e., when the particular valve closes; it may, rather, continue its course,
the bowler rolling over the portion bk of the cam. This continued motion will
have no influence on the already closed valve, it serving to only compress the
spring the more. The formation of the cam must therefore be such as to allow of
the easy and gradual expansion of the spring towards the middle of the piston's
stroke, and also of the gradual and easy travel of the gear.
es
Fig. shews another gear worked by a crank. The crank e drives, through a
rod 8, the bell crank lever h, b. At the middle of the piston's stroke (the crank
and the arm of the bell crank lever being at the respective points e¹ and b¹), the
spring is compressed, and on the return stroke of the piston (crank being at bell
crank arm at b, crank shaft at k), the valve is closed as described. The valve
being closed, the crank moves from e to e³ (and thence back again on the return
stroke). During this, the lever 6 moves to 62, and compresses the valve spring still
further. It is to be understood that this arrangement can be modified to any
extent, or any other employed, provided it frees the valve on the suction stroke,
and compresses the spring on the commencement of the closing of the valve.
Reciprocating rods can also be employed for the purpose, as in Fig. 6, which will
effect the compression of the spring at the time of closing the valve, as above
described.
The reciprocating rod 9 g, Fig. 6, is formed with a curved portion a, d, b, which,
as in the cam in Fig. 3, transmits the motion through a bowler to the lever h.
During the travel of the bowler up the slope a, d, b, the lever is raised,
b depressed, and the valve spring compressed.
The class of valve used is optional, as also is it, whether the pump be used to
pump water, gas, or air. Spiral or india rubber springs may also be used as the
operating springs.
For the spring action, might also be substituted compression of air and the
like.
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 :-
Piston valve gear for pumps, in which, between the valves (s or d) and the various
parts (6) of the gear, springs (f) are inserted, and in which the parts (6) of the
gear move in such a manner that the valves, uninfluenced by the springs (f) and
the parts (b) of the gear, only open through the differences of pressure in the
interior spaces of the pump, and are closed by these differences of pressure, under the
co-operation of the parts (b) of the gear and the springs f.
Dated this 23rd day of December 1891.
NEWTON & SON,
Agents for the Applicant.