Year: 1896

page_text: We, JAMES CORBETT, of 510 Gairbraid Street, Maryhill, and VERNOR JOHN
BAIN, of 8 West Princes Street, both in the County of the City of Glasgow,
Engineers, do hereby declare the nature of our invention to be as follows:-
This invention has reference to improvements in the construction of valves for
high or low pressure pumps for air, water, or other fluids by which such valves
having a large working and guiding surface will work more truly within their seats
and the rocking motion and consequent wear and destruction of valve face will be
minimised, while a gradual opening and closing of valve will be effected as also a
cushioning action of the water within the valve.
In carrying into practice the improvements of this invention the valve seat for
each valve would be formed as a close bottomed cylinder resting by a flange formed
around its open end, on a flange formed around the interior face of the valve chest
by which it would be securely held in position, er to which it may be secured in
any ordinary manner. The bottom of the valve seat would be formed of a conical
or inwardly dished shape, and around and through the lower part of its annular
wall ports would be formed a short distance above its bottom, for the ingress of
the fluid. The valve working within this cylindrical seat would be a metal wing
valve having a ring or cylinder formed around the wings with ports for the egress
of the fluid formed between the wings at the upper part a little below the disc part
at top of wings which rests on the turned surface at top of the valve seat, and the
lower part of the wings would be shaped to correspond with the dished bottom of
The valves when working vertically may have any ordinary stop to
prevent them lifting too far or they may be kept in position by a spring interposed
between the top of one valve and the seat of the one above, cr the top of valve
chest, in which case a short stem or stud may be formed on the top of the valve
to hold the spring in position. When springs are used the valves will work in
any position vertical, horizontal, or angled.
The action of the valve is that when the fluid presses on the valve by the action
of the pump it finds its way to the inside of the valve hetween the cylinders of the
valve and the valve seat which do not fit absolutely fluid tight, by which means a
gradual opening of the valve is effected. On the reverse action of the pump all
the ports of the valve and valve seat are closed before the valve comes into contact
with its seat and a cushioning effect is thus produced by the water which is thus
imprisoned within the valve until it escapes gradually.
When the cushioning action is not desired, the same form of valve may be used
with an ordinary seating, but having same made deeper than usual so as to obtain
the benefit of the greater working surface and steadiness of action.
Dated this 2nd day of March 1896
W. R M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.

page_text: We, JAMES CORBETT, of 510 Gairbraid Street, Maryhill, and VERNOR JOHN
BAIN, of 8 West Princes Street, both in the County of the City of Glasgow,
Engineers, do hereby declare the nature of our invention, and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement in writing-
This invention has reference to improvements in the construction of valves, for
high or low pressure pumps, or in connection with same, for air, water, or other
fluids, or gases by which such valves having a large working and guiding surface
will work more truly within their seats and the rocking motion and consequent
wear and destruction of valve face will be minimised, while a gradual opening and
closing of valve will be effected as also a cushioning action of the water, air, or
other fluids or gases, within the valve.
And in order that our said invention may be properly understood we have
hereunto appended a sheet of explanatory drawings in which
Figure 1 is a vertical section of a double acting pump fitted with our improved
valves, Figure 2 is a plan of same partly in section, while
Figure 3 is a view of one of the valves to an enlarged scale and partly open to
show the arrangement of the ports.
Referring to these drawings:-A is the pump barrel, and B is one of the valve
chests fitted with the inlet and outlet valves C, and their seats c.
In carrying into practice the improvements of our invention, the valve sent c for each
valve C is formed as a close bottomed cylinder resting by a flange c' formed around
its open end, on a flange B', formed around the interior face of the valve chest B by
which it is securely held in position or to which it may be secured in any ordinary
manner. The bottom of the valve sent is formed of a conical or inwardly
dished shape whereby the fluid forced or drawn through its ports is distributed
with equal force upon the under part of the valve C to obviate any rocking motion
of same, and around and through the lower part of its annular wall inlet ports of
are formed a short distance above its bottom, for the ingress of the fluid. The
valve C working within this cylindrical seat c is a metal wing valve having a ring
or cylinder C¹ formed around the wings C2 with outlet ports C for the egress of
the fluid, formed between the wings C at the upper part and a little below the
diec part C at top of wings C which rests on the turned surface at top of the
valve seat and the lower part of the wings C are shaped to correspond with
the dished bottom of valve seat c. The valves when working vertically may
have any ordinary stop to prevent them lifting too far as indicated at D in Figure 1
they may be kept in position by a spring interposed between the top of one valve
and the seat of the one above, or the top of valve chest B and in this case instead
of being fitted as shown a short stem or stud may be formed on the top of the valve
to hold the spring in position. When springs are used the valves will work in any
position vertical, horizontal or angled.
The action of the valve is that when the fluid presses on the valve by the action
of the pump it finds its way to the inside of the valve between the cylinders of the
valve Cand its seat c which are not fitted absolutely fluid tight by which means a
gradual opening of the valve is effected. On the reverse action of the pump all the
ports of the valve and valve seat are closed before the valve comes into contact
with its sent and a cushioning effect is thus produced by the water, air, or
other fluids or gases which is imprisoned within the valve until it escapes
gradually.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
First. Valves constructed all substantially as herein described and illustrated
by the accompanying drawings.
Second. The construction of a metal wing valve, having a ring or cylinder
formed on the lower ends of the wings in combination with a cylindrical seat
formed with outlet and inlet ports respectively, all substantially as herein
described and illustrated by the accompanying drawings.
Third. The combination of a metal wing valve as described with a cylindrical
seat having a dished up or pyramidical close bottom and formed with outlet and
inlet ports respectively all substantially as and for the advantages herein described
and illustrated by Figure 1 of the accompanying drawings.
Fourth. The combination of valves and valve seats as described with ordinary
spiral or other equivalent springs for the purpose of enabling said valves to work
efficiently in any position all substantially as herein described and indicated in
Figure 1 of the accompanying drawings.
Dated 2nd day of December 1896
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.