AN IMPROVED. LIQUID OR GAS METER
Year: 1868

page_text: LETTERS PATENT to Edme Augustin Chameroy, of Paris, Rue
Faubourg St. Martin, No. 162, Manufacturer, for the Invention
of "AN IMPROVED. LIQUID OR GAS METER."
PROVISIONAL SPECIFICATION left by the said Edme Augustin
Chameroy at the Office of the Commissioners of Patents, with his
Petition, on the 21st May 1868:
I, EDME AUGUSTIN CHAMEROY, of Paris, Rue Faubourg St. Martin,
No. 162, Manufacturer, do hereby declare the nature of the said Inven-
tion for "AN IMPROVED LIQUID OR GAS METER," to be as follows:-
My Invention. has reference to an improved construction of meter
wherein the variable flow of liquids or gases is measured by a variable.
motion imparted to a counter by a clockwork mechanism. For this
purpose I construct a tapering or conical tube or chamber, the lower:
end of which is in connection with the supply pipe for the fluid or.
gas, while the upper end is in connection with an outlet pipe.
Near-
the lower end of the chamber is situated a disc or valve fitting on a

page_text: very narrow seat formed in the chamber, to which valve is attached a
guide rod, to the upper end of which is connected a wire thread passing
up through a stuffing box on the closed top of the chamber and over
guide rollers into the casing of the counting apparatus. Here the wire
is attached to a framework acting as a counterweight to the valve, and
which carries a spindle having at its upper end a toothed pinion in
gear with the wheels of a counter. This spindle also carries a small
roller or disc fixed thereto, which is kept in frictional contact with the
face of a disc receiving continuous rotary motion from any suitable
clockwork mechanism. The valve in the conical chamber in being
raised to a greater or less extent from its seat in proportion to the
pressure or quantity of the fluid or gas passing through the chamber
causes the frame constituting the balance weight and with it the spindle
to descend in a corresponding manner, whereby the roller of the spindle
by being brought in contact with a part of the revolving disc at a
greater or less distance from the centre thereof causes the spindle to
rotate with a corresponding greater or less speed, so that motion is
thereby imparted to the counter in exact relation to the position of the
valve, and consequently to the quantity of fluid or gas passing in.
The roller of the spindle is arranged in such a position that when no
fluid or gas is passing through the meter and the valve is consequently
closed, it is situated exactly at the centre of the revolving disc, and
thus no motion whatever is then imparted to the counter.
This apparatus is equally applicable as a high pressure and a low
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edme Augustin Chameroy in the Great Seal
Patent Office on the 20th November 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDME
AUGUSTIN CHAMEROY, of Paris, Rue Faubourg St. Martin, No. 162,
Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-first day of May, in the year
of our Lord One thousand eight hundred and sixty-eight, in the thirty-
first year of Her reign, did, for Herself, Her heirs and successors,

page_text: give and grant unto me, the said Edme Augustin Chameroy, Her
special licence that I, the said Edme Augustin Chameroy, my
executors, administrators, and assigns, or such others as I, the said
Edme Augustin Chameroy, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time
and at all times thereafter 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 "AN IMPROVED LIQUID OR GAS METER,"
upon the condition (amongst others) that I, the said Edme Augustin
Chameroy, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should par-
ticularly 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.
NOW KNOW YE that I, the said Edme Augustin Chameroy, 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, reference being had to the
accompanying Sheet of Drawings, and to the figures and letters marked
thercon, that is to say :-
This improved meter for liquids or gases is based on a new application
of the law of the flow of fluids. Its construction does not include any
mechanical parts such as pistons, cocks, turbines, or reaction wheels, or
any contrivance for measuring directly the liquids or gases. This meter
is specially applicable for indicating the quantity of gas, water, or other
fluids passing through main conduits for supplying towns and other
localities, or through branch conduits to supply private consumers, or
again, to measure the quantity of water flowing through canals either
for navigation or irrigation.
The action of this apparatus is based upon the possibility of estimating
a volume of fluid flowing under constant pressure through an orifice of
variable area by registering with accuracy by the aid of a variable motion
produced by the constant oscillations of a pendulum or other source of
motion the consecutive variations of the inlet orifice.
In order that the construction of this apparatus may be readily under-
stood I will at once proceed to describe the arrangement thereof as

page_text: shown on the accompanying Drawing, in which Figure 1
sectional front elevation of the apparatus, and Figure 2
sectional side view of the clockwork mechanism and counter.
letters of reference indicate similar parts in each of the Figures.
shows a
shows a
Similar
A is the inlet pipe for the water or other fluid; B is the casing of the
meter; C is a valve resting on a slight projection in the casing; D is a
spindle for guiding the valve in its motion, and which passes through
two guides E, F; G is a conical or tapering part of the casing in which
the valve C rises and falls in order to afford a greater or smaller area of
inlet orifice; H is the outlet orifice; I is a metal wire or cord for
transmitting the motion of the valve to the registering mechanism;
K are guide pulleys for the same; L is the spindle by which the
counterweight O, O, is suspended from the wire I. This spindle carries
the long toothed pinion M. N is a toothed wheel to which the rotary
motion of the spindle L is imparted by the pinion M; N1, N2, N³, N',
are other wheels and pinions for transferring such motion to the counter;
O is the balance weight to the valve C, consisting of two side rods O, O;
P is a small disc or roller carried by the spindle L, and kept in
frictional contact with the large disc R; S is a barrel spring for
transmitting to the disc R an uniform rotary motion produced by the
pendulum T, which spring consequently imparts motion to the wheels N
of the counting mechanism.
The operation of the apparatus, supposing it applied to the branch
service pipe of a private consumer, is as follows:-The inlet pipe A
being connected to the supply pipe any water entering the apparatus in
order to escape through the outlet opening H must act upon the valve C,
and through this on the counter. So long as no water is passing through,
the valve C will remain on its seat as indicated in the Drawing, in
which position it will be seen that it will cause the spindle L to be so
suspended that the disc P is situated at the centre of the rotating
disc R, in which position consequently no rotary motion will be
imparted by the latter to the former, and therefore also no rotary motion
will be imparted to the spindle L, and through it to the counter. As
soon, however, as water is drawn off through the outlet H, thus
diminishing the pressure on the top of the valve C, the water in the
supply pipe A will force the valve upwards until an annular inlet orifice
is formed between the edges of the valve and the sides of the casing G,
in exact proportion to the quantity of water passing through to supply

page_text: the place of that drawn off through H. Arrived at such point the valve
will remain stationary, as its weight, less that of the counterweight O, O,
will then be exactly balanced by the excess of pressure of the water
passing up through the inlet pipe over and above the pressure of the
column of water above the valve. This upward motion of the valve C
will have caused the spindle L, and with it the disc P, to descend, thus
bringing the latter in contact with a point of the disc R, the distance
of which from its centre will be in proportion to the rise of the valve.
The rise of the valve being always in exact proportion to the area of
the annular orifice formed by such rise, and the rotary speed of any
point of the disc R being always in exact proportion to its distance
from the centre, it follows that the rotary motion imparted by the diso R
to the disc P, and through this to the spindle L and pinion M will
always be in proportion to the inlet orifice, and consequently also to the
volume of water passing through the meter in a given time. The motion
of the spindle L being imparted as above described to the wheels N of the
counter, this latter will be made to indicate correctly the quantity of
water passing through. When the quantity of water drawn off diminishes,
the valve C will sink to a corresponding extent, and a corresponding
slower motion will be imparted to the counter by the disc R, and when
no more water is drawn off the valve will close, and the disc P being
thus again raised to the centre of the disc R no motion will be imparted
to the counter. The only alteration required in the apparatus for
measuring large or small quantities is in the size of the valve C, and
of the conical casing G, the other part of the mechanism being
the same in every case. It is important to observe that this apparatus
has the great advantage of requiring only a very small supply of
water to put it in action. It may with equal advantage be employed
for high-pressure service, as no matter how great and sudden the
variations in pressure may be, the before-described action of the valve C
will always take place with the same exactitude, and will always be in
proportion to the fluid or gas passing through.
Having thus described the nature of my Invention, and in what
manner the same is to be performed, what I claim under the herein-
before in part recited Letters Patent is,-
First. Constructing apparatus for measuring the flow of fluids or gases
wherein the rise and fall of a valve, according to a greater or less flow of
fluid passing through is caused to produce a correspondingly varying

page_text: area of inlet orifice, and at the same time causes motion to be imparted
to registering mechanism in exact proportion to such different areas, and
consequently also to the quantity of fluid or gas passing through,
substantially as herein-before described.
Second. I claim the general arrangement of apparatus for measuring
the flow of fluids or gases herein-before described with reference to the
accompanying Drawing.
In witness whereof, I, the said Edme Augustin Chameroy, have
hereunto set my hand and seal, this Fifth day of November,
in the year of our Lord One thousand eight hundred and sixty-
eight.
Witness,
CH. ARMENGAUD,
Civil Engineer,
E. A. CHAMEROY. (L.S.)
Boulevard de Strasbourg, 23,
Paris.