Year: 1871

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LETTERS PATENT to,Richard Brown Evered, of No. 28, Drury Lane,
in the County of Middlesex, Brass Founder, for the Invention of

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In carrying out my Invention I employ a body with three ports or
openings in a flat face; they communicate respectively with the
measuring vessel, the inlet, and the delivery. Upon the body and
covering the face is fixed a disc of india-rubber, leather, or other
flexible material which is held in its place and made perfectly sound by
the flange of a metal cover fixed to the body by screws or otherwise.
In the metal cover the moving parts are contained, videlicet, a rotating
spindle with a circular plate or cam on its lower end, a portion of which
is so shaped as to form two inclined planes which act on metal plates
fixed to the india-rubber or flexible material immediately over the inlet
and outlet passages. In one position of the spindle and cam the plate
over the delivery port is pressed down, and the port is thus closed. At
this time the water is free to pass through the inlet port into the
measuring vessel, compressing the air therein to a pressure correspond-
ing to that at which the water is supplied. On turning the spindle it
in a similar manner closes the inlet port and opens the delivery port,
allowing the water to flow from the measuring vessel until empty, and
then no more can pass. The spindle is kept to its bearing by a metal
plate, nut, and guide." I sometimes use metal valves-in-the ports, and
"dispense with the flexible disc. In this case the spindle passes through
a stuffing box on the cover.
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The arrangement may be modified by causing the three passages
above mentioned, the inlet, the delivery, and the connection with the
measuring vessel to terminate within a conical shell in which a plug like
that of an ordinary cock is able to turn. The plug has a water-way
through it, by which either the inlet passage or the delivery passage
may be put in communication with the measuring vessel. The shell is
closed at its smaller end, and a pin in it entering a notch in the end of
the plug prevents the plug being so turned as to connect the inlet and
the delivery passages, or the pin may be in the end of the plug and a
T

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SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Richard Brown Evered in the Great. Seal. Patent
Office on the 30th May 1872.
H
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
BROWN EVERED, of No. 28, Drury Lane, in the County of Middlesex,
Brass Founder, send greeting..
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i
WHEREAS Her most Excellent Majesty Queen Victoria, by "Her
Letters Patent, bearing date the Thirtieth day of November, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and successors,"
give and grant unto me, the said Richard Brown Evered, Her special
licence that I, the said Richard Brown Evered, my executors, adminis
trators; and assigns, or such others as I, the said Richard Brown.
Evered, my-executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there
after during the term therein expressed, should and lawfully might make,
-use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN TAPS OR VALVES," upon the condition (amongst others)
that I, the said Richard Brown Evered, my executors or administrators,>>
by an instrument. in writing under my, or their, or one of their hands t
and seals, should particularly describe and ascertain the nature of the
said: Invention, and in what manner. the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
LA
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NOW KNOW YE, that I, the said Richard Brown Evered, do hereby,
declare the nature of the said Invention, and in what manner, the same
is to be performed, to be particularly described. and ascertained in and.
by the following statement thereof, that is to say:
This Invention has for its object improvements in taps or valves.
In order that water may be drawn in measured quantities, and so that)
when the tap or valve is opened (in place of the flow, being continuous)

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PL.
71
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only the quantity may be discharged which the instrument is adjusted
to deliver I arrange taps or valves in the following manner: -I employ
asbody with three ports or openings in a flat face, they communicate
respectively with the measuring vessel, the inlet and the delivery.
Upon the body and covering the face is fixed a disc of india-rubber,
leather, or other flexible material, which is held in its place and made
perfectly sound by the flange of a metal cover fixed to the body, by.
screws or otherwise. In the metal cover the moving parts are con-
tained, viz., a rotating spindle with a circular plate or cam on its lower
end, a portion of which is so shaped as to form two inclined planes
which act on metal plates fixed to; the india-rubber or flexible material
immediately over the inlet and outlet passages: In-one position of the
spindle and cam the plate over the delivery port is pressed, down, and
the port is thus closed; at this time, the water is, free to pass through
the inlet port into the measuring vessel compressing the air therein to a
pressure corresponding to that at which the water is supplied... On.
turning the spindle it in a similar manner closes the inlet port and opens
the delivery, port, allowing, the water to flow from the measuring vessel.
until empty, and then no more can pass. The spindle is kept to its
bearing by a metal plate, nut, and guide....
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41 ngiamant in
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In the annexed Drawings Figure ris an end view, partlyin.section,
of a tapior valve thus arranged; dis the body; it is shewn separately
in Figure 2, which is a side view, partly in section; alis the flat face in
which the three ports a, a, and at, are formed: The portalis in-com-
munication with the socket as which receives the inlet pipe; the port a 2
leads to the delivery spout a, and the port a opens into the socket-a;
into which the neck of a measuring air vessel is screwed; b is a piece of
vulcanized india-rubber or other flexible material which covers: the-
ports; over it the cap or cover c is placed, and-the tap screws which
secure the cap or cover also serve to clip the edges of the diaphragm b. a
Between the face and the cover and 62 are metal discs fixed upon the
-flexible-material-6, they are over the ports a² and a³, and are attached
by-screw-stems passing through the material 6 and receiving nuts on
the inner side. In the centre of the cap or cover c is a tapped hole, into
the hollow screw d is received; through it the spindle e passes.
On the lower end of this spindle the cam-plate f is formed or fixed; it
has two rises and upon it with hollows-between them; the rises on

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the cam plate when they are over the discs and hold them down
and so close the ports beneath. The rises f¹ and fare so placed that
however the spindle e be turned the cam at all times holds down one or
other of the discs b; b², so that when the outlet is open the inlet is
closed, and vice versa; the port a is always open, and the other.open
port, a² or a³ is in free communication with it, the water passing from
one to the other beneath the diaphragm b. Thus when the outlet is
closed the water passes into, the air vessel, compressing the air thercin,
and when the outlet is opened this measured quantity of water and no
ore, escapes.;
the hollow screw d serves to adjust the pressure of the
cam upon the discs 61 and 62, so that the ports may be perfectly closed;
the screw bears on a plate o interposed between it and the cam; the
plate is prevented turning by wings c³ on the interior of the cap or
more

page_text: and the spindle is surrounded by a packing to hold the plug in its seat.
At its other end the plug has a projection or, pin in its end entering a
Tecess-in-the solid bottom of the plug hole in the body.
Two-way cocks may be "nighted" or provided with stops at the inner
end of the plug in a similar manner, and this method of "nighting" is 5
more fully shewn in connection with a two-way cock at Figures 5 and 6.
Figure 5 is a side view of a two-way, cock, and Figure 6 is a vertical
section of the same; & is the body with its water passages and is the
plug with the water-way through it; ³ is the spindle of the plug; it
receives a handle by which the plug is turned; is a packing space 1
over the plug the cover rests on the packing and is held down to its
place by the cap; ³ is the "nighting” pin in the lower end of the
plug %; it enters as is shewn a recess in the solid end of the plug hole
in the body. The form of the recess may be such as is shewn in
Figure 7 or Figure 8, the length of the recess and the form of the pin 1
are such as to limit the motion of the plug to the extent .desired;
Figures 7 and 8 shew form's suitable for the tap or valve Figure 4.
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Figures 9, 10, and 11 shew a two-way tap or valve made in a similar
manner to that described in respect to Figures 1 and 2; Figure 9 is a
longitudinal section; and Figure 10 a side view of the body;a is the 2
body; its face a¹ has two ports in it, the inlet a² and the outlet a; 6' is
the flexible diaphragm with but one disc b¹ upon it, and this is over the
inlet port, and on one side of the disc c is the cap or cover; e the
spindle, and the cam upon the spindle, which however has but one rise
upon it. The spindle e passes through the top of the cap or cover c, and 2
has a handle fixed upon it; Figure 11 shews the parts b, c, e, and f
separately with a slight modification of the forms of some of the
parts.
"
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page_text: 3rd. The arrangement for drawing off measured quantities of water
substantially as described in respect to Figure 4.
"
4th: The method of "nighting" taps or cocks substantially as
described in respect to Figures 4, 5, 6, 7, and 8.
In witness whereof, I, the said Richard Brown Evered, have.here-
unto set my hand and seal, this Thirtieth day of May, in the year
of our Lord One thousand eight hundred and seventy-two.
R. B. EVERED. (L.S.)