Improvements in and relating to Liquid Meters.
Year: 1894

page_text: Date of Application, 13th June, 1894
Complete Specification Left, 13th Mar., 1895-Accepted, 13th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to Liquid Meters.
I, JOSEPH JOHN TYLOR, of 2 Newgate Street, in the City of London, Associate
Member of the Institution of Civil Engineers, do hereby declare the nature of this
invention to be as follows:-
It is well known that in rotary or inferential meters water or other liquid passes
through without being registered when the velocity of the liquid is not sufficient
to set the fan or other measuring instrument in motion; but in certain arrange-
ments of such meters special means are provided for mensuring the quantity of
liquid that would, under the above mentioned circumstances, pass through the
meter without registration. The said arrangements consist in combining with the
main rotary or inferential meter a secondary meter placed in a bye-pass and
capable of measuring small flows that would not be measured by the larger main
meter.
My present invention relates to improvements in connection with the aforesaid
arrangement of combined main and secondary meters, and consists of certain
means or devices for putting the main or secondary meter into or out of action
according as the velocity of the flow of water or other liquid varies.
.
:
For this purpose I arrange in the main inlet to the meters a valve box having
two outlets, one leading to the main meter, and the other to the bye-pass in which
the secondary meter is placed, the outlet from the secondary meter leading to the:
outlet of the main meter in the usual way. The aforesaid valve box provided.
with a valve or valves so arranged that when the outlet from the valve box leading.
to the main meter is closed by the valve, or by one of the valves, the outlet from
the valve box leading to the bye-pass and secondary meter is open and vice versa.
According to one arrangement I provide the aforesaid valve box with a spherical
valve adapted to roll to and fro in the box the cross section of which approximates
more or less to the shape and size of the spherical valve which is adapted to close
either of the aforesaid outlets from the valve box according to circumstances. It
will now be understood that when the velocity of the passing liquid is sufficient to
cause the main meter to operate and to register, the spherical valve is forced away
from its seat at the outlet leading to the main meter, and against the seat at the
outlet leading to the secondary meter, so that all the liquid passes through the main
meter; but when the velocity of the passing liquid is not sufficient to cause the
main meter to operate and to register, the spherical valve closes, either by
the action of gravity or of a spring, the outlet to the main meter, and opens
the outlet to the secondary meter so that all the liquid then passes through the
latter. When the velocity increases again sufficiently the spherical valve again
closes the outlet to the secondary and opens that to the main valve, and so on,
opening or closing the outlet to the main or to the secondary valve according to
the velocity of flow of the liquid passing.
Instead of a spherical valve I may employ any other suitable arrangement of
valve having two faces, one adapted to close the outlet to the main meter and the.
other to close the outlet to the secondary meter, but so arranged that only one
outlet can be closed at a time and that the velocity of the liquid passing

page_text: determines which shall be open at any given time. For example a double-hinged
clack valve may be employed so arranged that when in one position one of its
valves closes the outlet leading from the valve box to the main meter, the other
valve being withdrawn from the outlet leading from the valve box to the secondary
meter; but when turned into the other position by the passing liquid the outlet to
the main meter is opened and that to the secondary closed.
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Improvements in and relating to Liquid Meters.
I, JOSEPH JOHN TYLOR, of 2 Newgate Street, in the City of London, Associate
Member of the Institution of Civil Engineers, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
It is well known that in rotary or inferential meters, water or other liquid
passes through without being registered when the velocity of the liquid is not
sufficient to set the fan or other measuring instrument in motion, but in certain
arrangements of such meters special means are provided for measuring the quantity
of liquid that would, under the above mentioned circumstances, pass through the
meter without registration. The said arrangements consist in combining with
the main rotary or inferential meter a secondary meter placed in a bye-pass, and
capable of measuring small flows that would not be measured by the larger main
meter.
My present invention relates to improvements in connection with the aforesaid
arrangement of combined main and secondary meters, and cousists of certain means
or devices for putting the main or secondary meter into or out of action according
as the velocity of the flow of water or other liquid varies.
And in order that the said invention may be fully understood I will now proceed
to describe the same with the aid of the accompanying sheet of drawings in which
Figure 1 is a plan showing a main meter combined with a secondary meter
placed in a bye-pass and having one form of my improvements applied thereto;
Figure 2 a sectional elevation taken on the line X-X of Figure 1, but to a
larger scale, of my improved device as shown applied in Figure 1, and Figures 3
and 4 are sectional elevations of modifications of the arrangement shown in
Figure 2.
In Figure 1, A represents the main meter, B the inlet pipe, and C the outlet
pipe. Dis the secondary meter placed in the bye-pass pipe E, and F is my
improved device for putting the main or secondary meter automatically into or out
of action according as the velocity of the flow of water or other liquid varies.
I arrange in the main inlet B to the meters a valve box F having two outlets,
one leading to the main meter A, and the other to the bye-pass E in which the
secondary meter D is placed, the outlet from the secondary meter leading to the
outlet C of the main meter in the usual way. The aforesaid valve box F is
provided with a valve or valves so arranged that when the outlet from the valve
box leading to the main meter is closed by. the valve, or by.one of the valves, the
outlet from the valve box leading to the bye-pass and secondary meter open,
and vice versa.
According to the arrangement shown in section in Figure 2 and in plan in
Figure 1, the valve box F is provided with a spherical valve G adapted to roll to
and fro in the box, the cross section of which approximates more or less to the

page_text: shape and size of the spherical valve G which is adapted to close either the outlet H
leading to the main meter or the outlet I leading to the secondary meter, according
to circumstances.
It will now be understood that when the velocity of the liquid entering the valve
box Fat B is sufficient to cause the main meter to operate and to register, the
spherical valve G is forced away by the pressure of the liquid from its seat at the
outlet H leading to the main meter, and against the seat at the outlet I leading to
the secondary meter, so that all the liquid passes through the main meter; but when
the velocity of the liquid entering at B is not sufficient to cause the main meter to
operate and to register, the pressure of the liquid is not sufficient to press the
spherical valve G against the outlet I and consequently it falls back and closes
the outlet H to the main meter, thus opening the outlet I to the secondary meter
so that all the liquid then passes through the latter. When the velocity of the
liquid increases again sufficiently, the spherical valve G again closes the outlet I
leading to the secondary meter, and opens the outlet H leading to the main meter,
and so on opening or closing the outlet to the main or to the secondary meter
according to the velocity of flow of the liquid passing.
The spherical valve G may be arranged to fall back from the outlet I to
the outlet H by the action of gravity, and for this purpose the valve
box F may be placed in an inclined position as shown, or it may be forced
back by a spring. The valve G may be prevented from rolling down beyond
its seat at the outlet H by a suitable stop such as J for example in Figure 2, care
being taken however to leave passages such as K for the passage, between the stop
and the valve, of the liquid flowing to the outlet I. The spherical valve G may
be hollow or solid and composed of india-rubber, vulcanite, metal, or other suitable
or convenient material, loaded or not according to circumstances.
Instead of a spherical valve I sometimes employ the arrangement shown in
Figure 3 in which a double clack valve is employed, one face of which, marked G¹,
is adapted to close the outlet H leading to the main meter, and the other,
marked G, to close the outlet I leading to the secondary meter. This double
clack valve is hinged at L, and when the velocity of the liquid entering at B is
sufficient to cause the main meter to operate and to register, the said valve is
turned on its hinge L by the pressure of the liquid so that the face G' closes the
outlet I, and the face G₁ is raised from and opens the outlet H, the liquid then
passing to the main meter; but when the velocity of the liquid entering at B is not
sufficient to cause the main meter to operate and to register, the pressure of the
liquid is not sufficient to press the face G' against the outlet I and the double
clack valve turns back on its hinge into the position shown in Figure 3 with the
face G closing the outlet H, and the face G' withdrawn from the outlet I so as to
allow the liquid to pass to the secondary meter.
Figure 4 shows a further modification in which a pistou M fitting loosely in the
valve box F is provided with a valve face G³ adapted to close the outlet H, and
with a valve G adapted to close the outlet I. In this case when the velocity of
the liquid entering at B is sufficient to cause the main meter to operate and to
register, the pressure of the liquid raises the piston M, closing the outlet I and
opening the outlet H which allows the liquid to pass to the main meter.
When
the velocity of the liquid is not sufficient to operate the main meter the piston M
descends, closing. the outlet H and opening the outlet I; the liquid then passes
between the piston and the side of the valve box to the outlet I and thence to the
secondary meter.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In connection with a main meter combined with a secondary meter in a bye-pass,
the use in the main inlet to the meters of a valve box having two outlets, one
leading to the main meter and the other to the secondary meter, and a valve or

page_text: valves adapted to open and close the said outlets according as the velocity of the
liquid varies, substantially as described and for the purpose specified.
Dated this 13th day of March 1895.
J. J. TYLOR,
Per W. H. Beck,
115, Cannon Street, London, Agent.