Year: 1887

page_text: Date of Application, 7th Apr., 1887
Complete Left, 7th Jan., 1888
Complete Accepted, 10th Feb., 1888
the nature of this invention to be as follows :—
This fluid meter has a cylindrical casing provided with conduits for the influx and
efflux of the fluid, it is divided into two equal parts by a partition which contains
connecting conduits. Each part contains a segment shaped working piece doing the
work of a piston which oscillated like a pendulum, the stroke being limited on both
sides by a stop.
The disposition of the apparatus is arranged in such a way that one of the working
pieces or pistons reciprocally and alternately operates as a slide valve for the other
to which purpose the channels or conduits in the casing and in the working pieces or
pistons are so distributed that one of them begins to move the very moment the other
has completely finished its stroke. This last part of the stroke or travel of a working
piece or piston does not only take place by means of the partial fluid pressure but
also by the aid of its own force of gravity. In consequence of this the other working
piece the centre of gravity of which has to rise, remains at rest until the first working
piece arrives at its stopping point. Both of the working pieces or pistons which are
subjected to the same fluid pressure the moment the conduits of one of them are
opened, would move without a determined limit of their stroke, if the force of gravity
of one of the working pieces did not cause its full stroke or descent, while the force of
gravity of the neighbouring working piece or piston exerted resistance.
The combination of the conduits can be arranged in any suitable way.
The strokes of the working pieces or pistons are registered in any suitable manner
as by means of a ratchet wheel and gear to a revolution counter indicating the number
of gallons which have passed through the meter.
Dated this 7th day of April 1887.

page_text: I, ALBERT SCHMID of Zurich, Switzerland, Mechanical Engineer, 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 :-
This fluid meter, shown by the accompanying drawings is composed of a cylindrical
casing A provided with conduits for the influx and efflux of the fluid, it is divided
into two equal parts by a partition B which contains connecting conduits. Each part
contains a segment shaped working piece C doing the work of a piston which oscillates
like a pendulum the stroke being limited on both sides by a stop D.
The disposition of the apparatus is arranged in such a way that one of the working
pieces or pistons C reciprocally and alternately operates as a slide valve for the other,
to which purpose the channels or conduits in the casing A and in the working pieces
or pistons Care so distributed that one of them begins to move the very moment the
other has completely finished its stroke. This last part of the stroke or travel of a
working-piece or piston does not only take place by means of the partial fluid-pressure
but also by the aid of its own force of gravity. In consequence of this the other
working piece, the centre of gravity of which has to rise, remains at rest until the
first working piece arrives at its stopping point. Both of the working pieces or
pistons which are subjected to the same fluid pressure the moment the conduits of one
of them are opened would move without a determined limit of their stroke, if the
force of gravity of one of the working-pieces did not cause its full stroke or descent
while the force of gravity of the neighbouring working piece or piston exerted
resistance.
The combination of the conduits can be arranged as shown by figures 1 to 4 or in
any suitable way. The direction which the fluid has to follow by the above
arrangement is shown by the arrows.
The strokes of the working picces or pistons are transmitted by means of a ratchet
wheel and gear E to a revolution counter F indicating the number of gallons which
has passed through the meter as shown by figure 5.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, declare that what I
claim is :-
1. In a fluid meter a cylindrical casing A divided into two equal parts by a
partition B. The cylindrical casing A contains in- and efflux-conduits with corre
sponding ports: In each of the spaces contained in the casing A moves an equal
segment shaped working piece or piston provided also with conduits and in and

page_text: outlet ports to which the partial pressure of the liquid and at the second part of their
travel conjointly with their own force of gravity, give to both an alternative pendulum
motion to the right and left of the vertical axis their stroke or amplitude being
limited on both sides by the stop piece D. The influx and efflux conduits and ports
in the walls of the casing A and the same in the working pieces or cylinders are
combined in such a way that each piston C for itself reciprocally and alternately
serves as distributing slide valve to the other without the aid of a separate distributing
mechanism.