IMPROVEMENTS IN AIR-PUMP AND OTHER VALVES
Year: 1885

page_text: I, WILLIAM BRUCE THOMPSON of the Tay Foundry, Dundee, in the County of
Forfar, North Britain, Engineer do hereby declare the nature of the said invention
for IMPROVEMENTS IN AIR-PUMP AND OTHER VALVES to be as follows:—
This Invention relates to Improvements in air-pump and other valves and to the
construction of such valves of metal, preferably sheet copper, in lieu of the ordinary
India-rubber or like material.
My improved valve is formed in one, two, three, four or more parts or segments
each of which is hinged at its edge or near the centre of the valve so as to be
capable of pivoting about its axis, a guard plate, as hitherto used in connection
with India-rubber valves, being provided to limit the range of motion of the valve
or the parts or segments of the valve.
My improvements in air-pump and other valves further consist in forming the
grating, upon which the valve acts, with its passages or openings slanting or
formed in an oblique direction to the face of the valve in lieu of at right angles
thereto, as hitherto, the said improvement being especially applicable when using
the ordinary India-rubber valve.

page_text: Improvements in Air-pump and other Valves.
I, WILLIAM BRUCE THOMPSON of the Tay Foundry, Dundee, in the County of
Forfar, North Britain, Engineer do hereby declare the nature of my invention
for IMPROVEMENTS IN AIR-PUMP AND OTHER 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 improvements in air-pump and other valves and to the
construction of such valves of metal, preferably sheet copper, in lieu of the ordinary
India-rubber or like material.
My improved valve is formed in one, two, three, four or more parts or segments
each of which is hinged at its edge or near the centre of the valve so as to be
capable of pivoting about its axis, a guard plate, as hitherto used in connection
with India-rubber valves, being provided to limit the range of motion of the valve
or the parts or segments of the valve.
My improvements in air-pump and other valves further consist in forming the
grating, upon which the valve acts, with its passages or openings slanting or
formed in an oblique direction to the face of the valve in lieu of at right angles
thereto, as hitherto, the said improvement being especially applicable when using
the ordinary India-rubber valve.
In order that my Invention may be properly understood and readily carried
into effect, I will now proceed to describe the drawings hereunto annexed.
Figure 1, is a longitudinal section of an air and circulating pump, the valves of
which are constructed according to my present Invention.
Figure 2, is a plan of the pump bucket of the same shewing, at the lower left-
hand corner thereof, the slanting passages therethrough, at the upper left-hand
corner a plan of a portion of the hinged metal valve, while at the right-hand side
thereof, a portion of the guard plate is represented in plan all as hereinafter more
particularly described.
:
The valves constructed according to my present invention, are formed of metal,
preferably sheet copper, and in one, two or more parts or segments. The valves
which are represented upon the annexed drawings are each constructed in two
parts or segments a, and b, and those valves fitted at the left-hand end as at
Figure 1, or upper part of the pump and to the bucket thereof are shewn in
section while that valve at the right-hand end as at Figure 1, or lower part thereof
is shewn in side elevation. Each of the parts or segments a, and b, of these valves
is pivoted at c, to one side of a hinge block.d, similar to that which is shewn more
particularly at Figure 2, and which is secured down upon the valve seat or
grating e, by a pin ƒ, (Figure 2) or the equivalent thereof and also by the guard
plate g, the underside of which is recessed or hollowed out to receive such hinge
blocks d. The guard plate g, and hinge blocks d, upon the pump bucket are
secured in position between the collar h, and the nut i, on the pump rod j, while
those corresponding parts which are secured upon the foot valve are held in
position by the screwed bolt k, or the equivalent thereof. The guard plates g, are

page_text: perforated with the holes l, so as to allow the pressure of the air or water to bear
upon the upper surfaces of the valves or parts or segments a, and b, thereof and
thereby close them at the proper time, that is to say, to close the pump bucket
valve in the up-stroke and the other two valves in the down stroke, and the said
guard plates g, are further constructed with the webs n, which serve to strengthen
them.
My improvements in air-pump and other valves as shewn upon the annexed
.drawings further consist in forming the seat or grating e, upon which the
segments a, and b, of the valve acts, with the passages or openings m, slanting or
formed in a direction oblique to the face of the valve or segments a, and b, of such
valves. This last mentioned improvement is especially applicable in cases wherein
the ordinary India-rubber valves are employed.
Having now particularly described and ascertained the nature of my Inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:
First. The valves constructed in one, two or more parts of metal preferably
sheet copper and hinged and otherwise arranged to take the place of the India-
rubber or equivalently flexible valves as used hitherto in air and other pumps all
substantially as and operating in the manner hereinbefore set forth with reference
to the annexed drawings.
Second. In air-pump and other such valves the seat or grating e, having the
passages or openings m, slanting or formed in a direction inclined at an angle from
the face or surface of such seat or grating all substantially as hereinbefore set forth
with reference to the annexed drawings.
•
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1000