IMPROVEMENTS IN LOCOMOTIVE CLACK BOXES, AND CHECK VALVES
Year: 1885

page_text: I CHARLES SPENCER MADAN of Mansfield Chambers St Ann's Square Manchester,
in the County of Lancaster, Engineer, do hereby declare the nature of my invention
for IMPROVEMENTS IN LOCOMOTIVE CLACK BOXES, AND CHECK VALVES, to be as
follows:-
My Invention relates to an improved combination and construction of clack
boxes, or check valves as follows:-The valve consists of a disc with a central
spindle projecting on either side. The body or casing is cylindrical having a
seating in the centre. The inlet end of the cylinder is suitably prepared to receive
a pipe. A bridge or cross bar is cast in the body on the inlet side of the seating,
having a hole in it which forms a guide for the spindle on the inlet side of the
valve. The other end of the body is prepared to receive a screwed cap having
a hole in it forming a guide for the spindle on the outlet side of the valve. In
this cap a second hole is drilled in connection with the first-mentioned hole in such
& manner and in order that the back pressure may come on the end of the guiding
spindle equally with the other parts of the valve. On the side of the body is cast
a branch suitably prepared for fixing the clack box or check valve to the boiler or
other apparatus on which it is to be used. This branch forms also the outlet from
the valve.
The screwed cap hereinbefore mentioned may be so made, if required, as to form
a free passage for the outlet of the water, and to receive a pipe. In this case the
body is cast without any side branch, and the apparatus becomes a straight-way
check valve.
In the case of the clack box first described, it may also be made in such a manner
that the side branch forms the inlet instead of the outlet, the cap in the outlet end
of the body being made so as to afford a free passage for the water, and the inlet
end of the body being cast solid.
.

page_text: I CHARLES SPENCER MADAN of Mansfield Chambers Saint Ann's Square
Manchester in the County of Lancaster Engineer do hereby declare the nature of
my invention for IMPROVEMENTS IN LOCOMOTIVE CLACK BOXES OR CHECK VALVES,
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 an improved combination and construction of clack boxes
or check valves.
In the drawings hereto attached the view A shews my invention arranged as an
angle clack box, and the view B as a straightway check valve.
I will first describe the arrangement shewn in the view, A.
The valve consists of a disc having a central spindle projecting on either side.
The body or casing is cylindrical and is provided with a seating corresponding with
the valve. A bridge or cross bar is cast in the body on the inlet side of the
seating, having a hole in it which forms a guide for the spindle on the inlet side of
the valve,
The inlet end of the body is suitably prepared to receive a pipe.
In the drawing a gland is shown but any convenient method of connection may
be employed.
The other end of the body is prepared to receive a screwed cap having a hole in
it forming a guide for the spindle on the outlet side of the valve. In this cap
a second hole is drilled in connection with the first mentioned hole in such a
manner, and in order that the back pressure may act on the end of the spindle
equally with the other parts of the valve.
On the side of the body is cast an outlet branch suitably prepared for fixing the
clack box to the boiler or other apparatus on which it is to be used.
As shewn in the view B the screwed cap berein before mentioned may be so
made if required as to form a free passage on the outlet side of the valve, and to
receive a pipe. A cross bar is cast in the cap, forming a guide for the spindle
on the outlet side of the valve.
The apparatus then forms a straightway check valve.
In the case of the clack box first described it may also be made in such a manner
that the side branch forms the inlet instead of the outlet, the inlet end then
becoming the outlet and being provided with a cap similar to that shewn in the
view B.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
+
1. In clack boxes or check valves the use of a valve with guiding spindles, in
combination with a body provided with a seating, cross bar guide, and screwed cap,
substantially as described, and illustrated by the drawing A.

page_text: 2. In clack boxes or check valves the use of a valve with guiding spindles, in
combination with a body provided with a seating, cross bar guide, and screwed cap,
substantially as described, and illustrated by the drawing B.
3. In clack boxes or check valves the use of a valve with guiding spindles, in
combination with a body provided with a seating, and two screwed caps, substan-
tially as herein before described.