IMPROVEMENTS IN THE -A com- CONSTRUCTION OF WATER METERS AND MOTORS OR ENGINES
Year: 1871

page_text: LETTERS PATENT to David Hunter Brandon, Engineer, of 13, Rue
Gaillon, Paris, France, for the Invention of "IMPROVEMENTS IN THE
-A com-
CONSTRUCTION OF WATER METERS AND MOTORS OR ENGINES."
munication from Valentine Fogerty, residing at Boston, Massa-
chusetts, United States of America.
PROVISIONAL SPECIFICATION left by the said David Hunter Brandon
at the Office of the Commissioners of Patents, with his Petition,
on the 23rd December 1871.
I, DAVID HUNTER BRANDON, Engineer, of 18, Rue Gaillon, Paris,
5 France, do hereby declare the nature of the said Invention for “ IMPROVE-
MENTS IN THE CONSTRUCTION OF WATER METERS AND MOTORS OR ENGINES," to be
as follows:-
This Invention relates to an improved construction of water meters
and motors or engines, and to that class of such engines as employ a
O main cylinder and a reciprocating piston, with water ports or passages at

page_text: the respective ends of the cylinder, and mechanism by which the water
is made to alternately enter the opposite ends of the cylinder through
such ports and alternately exhaust or flow therefrom.
In this Invention the numerous parts employed in almost all if not
quite all of such meters are dispensed with, there being only an inlet
and outlet opening into two auxiliary cylinders, which auxiliary.
cylinders open into the two main cylinder ports, the inlet and outlet
opening into the auxiliary cylinders midway of their length, and there
being at the centre of each auxiliary cylinder a piston valve which
alternately closes entrance into or exit from the cylinder on each
side of it.
The Invention consists primarily in combining with a main cylinder
having an inlet and exhaust port at each of it, two auxiliary valve or
piston cylinders located directly over and parallel to the main cylinder;
one of the said auxiliary cylinders having opening into it the, inlet and
the other having opening from it the outlet, there being in the induction
cylinder at the opening thereinto a piston valve which by a reciprocating
movement closes first an entrance into one end of the cylinder, and opens
an entrance into the opposite end thereof, and next vice versa, opens an
entrance into the first end, and closes the entrance into the opposite
entrance, the piston in the eduction cylinder similarly closing the outlet
from one port of the cylinder and opening the outlet from the other port
thereof.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said David Hunter Brandon in the Great Seal Patent
Office on the 22nd June 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
HUNTER BRANDON, Engineer, of 13, Rue Gaillon, Paris, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of December, 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 David Hunter Brandon, Her special
licence that I, the said David Hunter Brandon, my executors, adminis-

page_text: The Invention consists primarily in combining with a main cylinder
having an inlet and exhaust port at each end of it two auxiliary valve
or piston cylinders located directly over and parallel to the main cylinder,
one of said auxiliary cylinders having opening into it the inlet and the
other having opening from it the outlet, there being in the induction
cylinder at the opening thereinto a piston valve, which by a reciprocating
movement closes first an entrance into one end of the cylinder, and
opens an entrance into the opposite end thereof, and next vice versa
opens an entrance into the first end, and closes the entrance into the
opposite end, the piston in the eduction cylinder similarly closing the
outlet from one part of the cylinder and opening the outlet from the
other part thereof.

page_text: passage.
But the water in the opposite inlet cylinder m has no outlet
(the pressure of the main piston keeping it charged), and when the
piston is reaching the end of its stroke the pressure upon the water in
chamber m is exerted upon the piston head c³, closing the induction end of
the cylinder l. The pressure of the inlet water upon the two piston heads
a², 62, is equal or nearly so, but the additional pressure upon the piston
heads c (which the piston head d³ does not have), starts the piston c³
from its seat, when the water will rush into the chamber m, the opposite
chambers 7, n, being full, reversing the pistons h, i, closing cylinder / to
entrance of water, and cylinder o to the escape of water. From the
chambers m, o, the induction water passes through the port q into the
main cylinder, driving the piston back to its first position, driving the
water upon the opposite side of the piston out through the chamber n
and reaching the end of its stroke, the water in the cylinder is pressed.
against the piston head a², starting it from its seat and again reversing the
pistons as before, the meter continuing thus automatically and inter-
mittently to receive water into and discharge it from the opposite ends of
the main cylinder.
The pivot eat each end of the eduction cylinder may extend down
into the main cylinder, as seen in dotted lines Fig. 2, in such position
that the piston will strike it and reverse or aid in reversing the valve
cylinder pistons. The entrance to the inlet or outlet may be partially
covered by a plate y to prevent lateral pressure upon the pistons.
The meter may be made with two valve seat tubes u instead of four.
The rocker beams s, t, may be hung a little out of centre to effect the
shifting or reversing of the pistons, or the valve seat tubes may be made
of deferential bores to vary the extent of pressure surface upon the
pistons to effect the change of the pistons. To make the main piston
solid and at the same time render it light it may be made as a shell or
tube filled with cork z, the cork ensuring lightness, and also answering
as an elastic bunter to lessen the concussions of the piston.
Movement is communicated from the main cylinder piston to the
register mechanism by means of a register pin f which is attached to
and held normally in position by a rubber spring 92, the pin being forced
outward slightly and positively by the contact of the piston b, and

page_text: retreating by the stress of the spring. To pack the pin and yet permit
its free movement, the pin is made with a nut piece h' which is screwed
down upon a screw ³, and fastens the spring at its centre between the
end of the nut and the end of the pin. Then at its outer edge the
spring is fastened by and between a nut 4³ and the head e, leaving
the spring and pin free to move, but packing them so that water cannot
exude by the pin or spring.
First. In combination with the main cylinder and its two induction
and eduction ports at its opposite ends the auxiliary and parallel
induction and eduction cylinders, each having a reciprocating piston in
line with the inlet or outlet of the cylinder, and each piston being
arranged to operate at each movement as a valve to close entrance into
one chamber of the induction or eduction cylinder, and open entrance to
th

page_text: Seventh. The register pin f* extending through the main cylinder
head when packed substantially as shewn and described.
In witness whereof, I, the said David Hunter Brandon, have
hereunto set my hand and seal, the Third day of June, in the year
of our Lord One thousand eight hundred and seventy-two.
Witness,
A. H. BRANDON.
D. H. BRANDON. (L.S.)
13, Rue Gaillon, Paris.