IMPROVEMENTS IN VALVES to be as follows:-
Year: 1885

page_text: We JAMES CORT and SAMUEL STEVENSON both of Lower Bland Street, Great
Dover Street, in the County of Surrey, Engineers do hereby declare the nature of
our said invention for "IMPROVEMENTS IN VALVES to be as follows:-
"
This invention has for its object the construction of valves adapted for
application to gas and water mains, and for the interciption of fluids, in such a
manner as to prevent the liability of the case, or that part forming the seat of the
valve, springing when the valve is being attached to the main, and so ensure a
valve that otherwise might be leaky, being and remaining tight. In addition
to this the invention combines the advantages of economy in construction and
convenience in application, and for repairs..
The invention consists in making the valve in three principal parts. One of
these parts is the slide valve, and the other two form the case, or case and seat.
That which forms part of the case and seat is made cylindrical, its outer end being
formed into a socket, or has a flange on its end adapting it for attachment to the
main or pipe to which it is to be applied, and near the other end there is also a
flange, while the extreme inner end forms the seat of the valve. The other part of
the case is also made cylindrical at its outer end and is furnished with a socket or
flange, while the inner end of the case is formed into a chamber and is bolted to
that part of the case first described. Within the chamber thus constructed the valve
is caused to slide up and down in the usual manner by a screw, rack and pinion, or
other suitable contrivance, such screw, rack and pinion or other contrivance being
placed either within the chamber or an extension of it, or exterior to it. For the
purpose of keeping the valve close to its seat when closed, the valve is furnished
with several small inclined planes which on the valve being lowered impinge upon
the ends of screws adjusted so as to produce the requisite pressure, and as this
pressure is exerted in the direction of the length of the pipe no springing can
ensue. Neither can any springing arise from the bolting of the two parts of the
case together when arranged as described. The valve is also provided with one or
more lugs which on being raised prevent the valve from being abraded by the
surface of the case.
4

page_text: .
"
We JAMES CORT and SAMUEL STEVENSON both of Lower Bland Street, in the
County of Surrey, Engineers, do hereby declare the nature of our invention for
"IMPROVEMENTS IN VALVES," and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement,
reference being had to the accompanying drawing and to the letters and figures
marked thereon, that is to say:-
This invention has for its object the construction of valves adapted for
application to gas and water mains, and for the interception of fluids in such a
manner as to prevent the liability of the case, or that part forming the seat of the
valve, springing when the valve is being attached to the main, and so ensure a
valve that otherwise might be leaky, being and remaining tight. In addition
to this the invention combines the advantages of economy in construction and
convenience in application and for repairs.
In order that the invention may be easily understood a drawing is attached
hereto and represents the improved valve and case in vertical section.
The invention consists in making the valve in three principal parts. One of
these parts is the slide valve A, and the other two form the case B or case and
seat C. That which forms part of the case and seat is made cylindrical, its outer
end being formed into a socket, or has a flange D on its end adapting it for
attachment to the main or pipe to which it is to be applied, and near the other end
there is also a flange E while the extreme inner end F forms the seat of the valve.
The other part of the case B is also made cylindrical at its outer end, and is
furnished with a socket or fange G, while the inner end of the case is formed into
a chamber and is bolted to E, or that part of the case first described. Within the
chamber thus constructed the valve A is caused to slide up and down in the usual
manner by a screw, rack and pinion, or other suitable contrivance being placed
either within the chamber or an extension of it, or exterior to it. For the purpose
of keeping the valve close to its seat when closed the valve is furnished with several
small inclined planes I. I which on the valve being lowered impinge upon the ends
of screws J adjusted so as to produce the requisite pressure, and this pressure is
exerted in the direction of the length of the pipe no springing can ensue.
Neither
can any springing arise from the bolting of the two parts of the case together
when arranged as described. At times and under some circumstances it may be
found more convenient to fix the inclined planes I to the case of the valve and tap
the screws into the back of the valve itself. The valve is also provided with one
or more lugs H which on being raised prevent the valve from being abraded by
the surface of the case.

page_text: Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that what
we claim is,-
The construction of valves with cases formed and bolted together as described
and having inclined planes and adjusting screws as herein described and shown on
the drawings.