Improvements in or relating to Check-valves for Hydraulic Apparatus.
Year: 1890

page_text: Date of Application, 25th Mar., 1890
Complete Specification Left, 17th Dec., 1890-Accepted, 31st Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Check-valves for Hydraulic
Apparatus.
I, ADOLPHE BAER, of Zürich, in the Republic of Switzerland, Iron Merchant,
do hereby declare the nature of this invention to be as follows :—
The object of this invention is a check valve for hydraulic rams
or similar
apparatus, which is distinguished from those hitherto in general use in that it can
be easily and quickly regulated and also partially observed from the outside.
The valve and its seat are arranged in the usual position, so that the valve rests
on the valve seat situated on the cover of the admission pipe, and a short distance
below the entrance to the air chamber. The guide spindle of the valve passes
downwards and projects from the bottom of the inlet passage and is guided by a
fixed sleeve rising from the bottom of the said pipe. This sleeve can be strengthened
by webs, which, whilst allowing a free passage above it on both sides, are fixed to
the top of the pipe and there taper off. Below the bottom of the pipe, the guide
spindle is provided with a stop plate abutment which can be regulated as desired,
and determines the vertical stroke.
The regulating is performed by moving the stop plate-which may then be held in
position by a nut and lock nut. "The stop plate can be lined with a thin covering of
elastic material, and the valve is provided with a leather or indiarubber ring at the
joint so that the shock of the valve stroke is reduced.
Dated this 94th day of March 1890.
WM. P. THOMPSON & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Check-valves for Hydraulic
Apparatus.
I, ADOLPHE BAER, of Zürich, in the Republic of Switzerland, Iron 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 :—
The object of this invention is a check valve for hydraulic rams or similar
apparatus, which is distinguished from those hitherto in general use in that it can
be casily and quickly regulated and also partially observed from the outside.
On the accompanying drawings:-
Figure represents a vertical section through the air chamber and the inlet
passage of a hydraulic ram with elack valve fitted therein, and
Figure 2 a plan of Figure 1.
The valve and its seat are arranged in the usual position, so that, as shown in
the drawing, the valve a rests on the valve seat situated on the cover of the
admission pipe, and a short distance below the entrance to the air chamber. The
guide spindle c of the valve passes downwards and projects from the bottom of
the inlet passage and is guided by a fixed sleeve g rising from the bottom of the
said pipe. This sleeve can be strengthened by ribs g, which, whilst allowing a
free passage above it on both sides, are fixed to the top of the pipe and there taper
off. Below the bottom of the pipe, the guide spindle is provided with a stop plate
abutment h, which can be regulated as desired, and determines the vertical stroke.
The regulating is preferably performed by moving the stop plate h, which may
then be held in position by a nut and lock nut k. k¹. This stop plate can be lined

page_text: with a thin covering of elastic material I, and the valve a is provided with a leather
or indiarubber ring at the joint so that the shock of the valve stroke is reduced.
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
claim is :-
A clack valve for hydraulic rams or similar apparatus, in which the valve a and
spindle e are guided by a sleeve g, rising from the bottom of the inlet passage, the
said guide spindle e projecting to the outside of the apparatus in such a way that an
adjustable stop plate abutment, suitably arranged at or near the end of the valve
spindle, determines the stroke of the valve, substantially as described.
Dated this 16th day of December 1890.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.