IMPROVE- MENTS IN WATER METERS to be as follows:-
Year: 1884

page_text: I HENRY WILLIAM PEARSON of Small Street Bristol in the City & County of
Bristol Engineer, do hereby declare the nature of my invention for "IMPROVE-
MENTS IN WATER METERS to be as follows:-
"
This Invention has for its object improvements in water meters.
I construct a water meter with three cylinders inclined one to another at angles
of 120 degrees. Each cylinder contains a double piston from which a connecting
rod passes to a crank on a central axis.
The crank and connecting rods are contained in a closed chamber in constant
communication with the water inlet and from which the only outlet is by valves
in the pistons.
The valve in each case consists of a plug inserted into the double piston; the
connecting rod is attached to this plug which indeed forms the moving part of the
joint connecting the rod with the piston.
Ports are formed in the plug and in the walls of the cavity into which the plug
is received and these are so arranged that whilst the double piston travels inwards
or towards the central axis water is able to pass freely from the central cavity of
the meter to the space in the cylinder beyond the double piston. The water so
passing the double piston is delivered during the outward stroke; the position of
the plug being then such as to prevent water passing from the central cavity but
to allow the water in the cylinder to pass to the space between the two parts of the
double piston and this space is always in free communication with the outlet by a
passage through the side of the cylinder.
The axis transmits motion to a counter which indicates the quantity of water
passing through.
The arrangement above described constitutes a simple convenient and compact
positive water meter.
11001

page_text: I, HENRY WILLIAM PEARSON of Small Street, Bristol, in the City and County
of Bristol, Engineer do hereby declare the nature of my invention for "IMPROVE-
MENTS IN WATER METERS" and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement:―
This Invention has for its object improvements in water meters.
I construct a water meter with three cylinders inclined one to another at angles
of 120 degrees. Each cylinder contains a double piston from which a connecting
rod passes to a crank on a central axis.
The crank and connecting rods are contained in a closed chamber in constant
communication with the water inlet and from which the only outlet is by valves
in the pistons.
. The valve in each case consists of a plug inserted into the double piston; the
connecting rod is attached to this plug which indeed forms the moving part of the
joint connecting the rod with the piston.
Ports are formed in the plug and in the walls of the cavity into which the plug
is received and these are so arranged that whilst the double piston travels inwards
or towards the central axis water is able to pass freely from the central cavity of
the meter to the space in the cylinder beyond the double piston. The water so
passing the double piston is delivered during the outward stroke; the position of
the plug being then such as to prevent water passing from the central cavity but
to allow the water in the cylinder to pass to the space between the two parts of the
double piston and this space is always in free communication with the outlet by a
passage through the side of the cylinder.
The axis transmits motion to a counter which which indicates the quantity of
water passing through.
The arrangement above described constitutes a simple convenient and compact
positive water meter.
Figure 1 shews.a side elevation of the meter, Figure 2 a horizontal section of
the same and Figure 3 a section on the line A B Figure 2 and Figure 4 a section
on the line C D.
A is the outer casing-B are the three cylinders C D and E are the pistons
working therein-F is the crank spindle, G the connecting rods from the three
pistons working on to the crank of this spindle-H are the cylindrical valve plugs
which also forin the moving parts of the joints which connect the rods G with the
pistons I is the water inlet by which water is introduced into the central cavity
of the meter J are exhaust passages all opening into a chamber at the bottom of
the meter, K is the water outlet passing off from one of the passages J. The way
in which the valve plugs H are inserted into their places is shewn in Figure 4.
Each plug is received into a corresponding cavity formed within and across the
central portion of the piston.
In the walls of this cavity are ports or openings by which water may be allowed
to pass from the central cavity of the meter to the back end of the cylinder. In
one of the side walls of this cavity is also a port L leading to an annular recess M
formed around the circumference of the piston.
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=

page_text: This annular recess is always open to the exhaust passages J through the ports N
(see Figure 2)-0 are cup leathers carried one at the front and the other at the
back end of each piston.
The parts of the plugs H which are opposite to the ports L are cut away in the
manner shewn at Figure 2-P is a closed case at the top of the meter for containing
the counting mechanism. The spindle G passes up into this case and by a worm
on its upper end gives motion to the train of recording wheels.
The action of the meter is as follows:-
The water entering at A presses on the inner face of all the pistons. When the
parts are in the position shewn in the drawing the piston O is at the dead point of
its forward stroke the back end of the cylinder has been filled with water and the
rocking of the connecting rod is turning the valve of this piston into position to
open the port L and allow water to pass from the back end of the cylinder to the
exhaust. The inlet water pressing against the piston D is forcing this piston
towards the back end of its cylinder-its valve being as shown in a position to
allow water to pass from the back end of the cylinder to the exhaust through the
port L annular recess M port N exhaust passage J and exhaust outlet K.
The piston E is moving inwards but its valve is open in such a way that water
can pass freely from the central space of the meter to the back end of the cylinder
so that the piston is in equilibrium and the back end of the cylinder is being
charged with water ready to be discharged when the piston makes its next back
stroke.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. In water meters the employment of a cylindrical valve contained within
the interior of each piston and rocked by a connecting rod passing from it to a
crank spindle substantially as described to control the admission and escape of
water from each cylinder of the meter.
2. The combination of three cylinders each fitted with a piston containing a
cylindrical valve which is connected by a rod with a crank on a crank spindle
for controlling the passage of water to and from the cylinders substantially as
described.
3. The construction of water meters substantially in the manner herein before
described and illustrated in the drawing annexed.
4. The construction of the pistons with the cylindrical rocking valve contained
in them substantially in the manner herein before described and illustrated in the
drawing annexed.