IMPROVEMENTS IN VALVES
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said William Lloyd at the Office
of the Commissioners of Patents on the 18th September 1882.
WILLIAM LLOYD of Newport, in the County of Monmouth, Marine Engineer
"IMPROVEMENTS IN VALVES
"
This invention relates to the construction of an improved gun metal valve
specially applicable for marine engine air pumps but also applicable for other
purposes.
In carrying out my invention I make the valve hollow on the top side so that it
will fit against the existing guards, or guards as at present constructed the
underside of the valve is formed with an annular groove or the outer edge of the
valve is brought downwards so as to bear upon the seat or grating and being of
uniform thickness forms a curved line; the under side of the said valve has thus
two narrow ground faces bearing respectively on the outer and inner circumference
of the face of the seat or grating; the centre of the valve has a hole bored therein
of the size of the pump rod.
Valves of this construction are stronger and less expensive than the valves
hitherto employed, they are more durable; they can be easily fixed to existing
guards and seats or gratings; the hollow form of the underside of the valve gives
more room for the water to flow through the grating the said water acting as a
cushion for the valve, and the comparatively small amount of surface of the valve
which comes in contact with the seat or grating lessens the risk of the valve
coming in contact with any grit or sediment which may rest on the grating.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Lloyd in the Great Seal Patent Office on the 17th March
1883.
WILLIAM LLOYD, of Newport, in the County of Monmouth, Marine Engineer
"IMPROVEMENTS IN VALVES
"
This invention relates to the construction and use of an improved gun metal
valve specially applicable for marine engine air pumps but also applicable for other
purposes.
In carrying out my invention I make. the valve hollow on the top side so that it
will fit against the existing guards or guards as at present constructed the underside
of the valve is formed with an annular groove or the outer edge of the valve is brought.
downwards so as to bear upon the seat or grating and being of uniform thickness
formes a curved line; the underside of the said valve has thus two narrow ground
faces bearing respectively on the outer and inner circumference of the face of the
seat or grating the centre of the valve has a hole bored therein of the size of the
pump rod.
:
In order to enable my invention to be fully understood I will now proceed more
particularly to describe the invention by reference to the accompanying drawing
in which figure 1-2 shews sectional elevations of head valves constructed
according to my invention; figure 3, plan of same and figure 4, sectional
elevation of an air pump bucket and valve. Similar letters in all the figures
represent similar parts.
In figures 1-2, and 3, C, is the valve fitted in working position between the
guard B, seat D, and around the guard stud A. I make the valve C, of sufficient
diameter to allow the proper bearing of the valve over the opening of the seat, the
inside diameter of the outer face of the valve being equal to the size of the
opening of the grating the metal around the central hole forms the inner face of
the valve, the height of the valve is equal to the space between the seat and guard
less the allowance for the necessary beat.
In these figures the valve marked figure 1, is shewn raised and the valve marked
figure 2, is shewn down resting upon its seat D.
Figure 3, shews the valve C, C, figures 1, and 2, covering the openings of their
gratings the other two valves are removed shewing the gratings of their seats.
Figure 4, is a sectional elevation of an air pump bucket shewing the valve C,
constructed as herein before described and shewn in figures 1, and 2, except that it
is larger in diameter to cover the whole area of the bucket seat grating.
Valves of this construction are stronger and less expensive than the valves
hitherto employed; they are more durable; they can be easily fixed to existing
guards and seats or gratings; the hollow form of the underside of the valve gives
more room for the water to flow through the grating the said water acting as a
cushion for the valve and the comparatively small amount of surface of the valve
which comes in contact with the seat or grating lessens the risk of the valve
coming in contact with any grit or sediment which may rest on the grating. As
only the two narrow ground faces of the valve bear upon the seat an air tight'
seating is obtained and the curved line of section of the valve gives the valve
greater strength than plain ones.
Having now described and ascertained the nature of my invention and the
manner of performing the same I wish it to be understood that what I claim to be

page_text: novel and original and intend to be protected by the herein in-part recited
Letters Patent is :-
.
The construction and employment of the improved valves arranged and operating
substantially as and for the purposes herein before described and illustrated in the
5 accompanying drawing.
In Witness whereof I the said William Lloyd have hereto set my hand and
seal this sixteenth day of March in the year of our Lord one thousand eight
hundred and eighty three.
WILLIAM LLOYD (L.S.)