Improvements in and connected with Electrolytic Meters.
Year: 1899

page_text: Date of Application, 22nd Nov., 1899
A
PROVISIONAL SPECIFICATION.
Improvements in and connected with Electrolytic Meters.
We, ARTHUR WRIGHT, of 26, Park Crescent, Brighton, in the County of
Sussex, Electrical Engineer, and THE MUTUAL ELECTRIC TRUST LIMITED, of
111, Gloucester Road, Brighton, in the County of Sussex, do hereby declare
the nature of this invention to be as follows:-
-
Our invention relates to electrolytic meters by means of which the draw-
backs arising from polarization or back electro-motive force are obviated and
the construction of accurate and reliable meters, through which only a fraction
of the total current need be passed, attained.
In carrying our invention into effect we place the electrolytic cell of the
meter in shunt to an ohmic resistance (which may be part of the main circuit)
and in this shunt circuit or bye-pass we place a battery or other extraneous
source of electro-motive force the object of which is to make up for the back
electro-motive force of the electrolytic cell.
Our invention is applicable not only to electrolytic meters of the ordinary
types but also for example to electrolytic meters of the osmotic type.
Improvements in and connected with Electrolyte mer
We, ARTHUR WRIGHT, of 26, Park Crescent, Brighton, in the County of
Sussex, Electrical Engineer, and THE MUTUAL ELECTRIC TRUST LIMITED, of
111, Gloucester Road, Brighton, in the County of Sussex, 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: —
Our invention relates to electrolytic meters by means of which the draw-
backs arising from polarization or back electro-motive force are obviated and
the construction of accurate and reliable meters, through which only a fraction
of the total current need be passed, attained.
In carrying our invention into effect we place the electrolytic cell of the
meter in shunt to an ohmic resistance (which inay he part of the main circuit)
and in this shunt circuit or bye-pass we place a battery or other extraneous

page_text: source of electro motive force the object of which is to make up for the back
electro-motive of the electrolytic cell.
This is diagrammatically illustrated in the drawing in which 1 and 2 are the
mains or leads in which the current passing is to be measured. 3, 3 are lamps
or other translators absorbing current. 4 is the ohmic resistance, 5 the electro-
lytic meter cell, and 6 the primary battery or other extraneous source of
electromotive force such for example as a thermo-electric pile (heated by suit-
able electric or other means) or a secondary battery. Here it will be seen that
the extraneous source of electro-motive force 6 is in shunt to the ohmic resis-
tance 4, that its current flows in the direction of arrow a and that it makes up
for or counterbalances the back electro-motive force (in direction of arrow b)
of the electrolytic meter cell. By this means we are enabled to use an electro-
lytic meter in a bye-pass or shunt circuit. Hitherto this has been impossible, as,
on account of the polarization in the electrolytic cell, a definite portion of the
current could not always be shunted, and consequently the whole of the current
to be measured had to be passed through the said electrolytic cell, with a conse-
quent loss of energy. The method of employing a thermo-electric couple instead
of a battery is obvious and does not require separate illustration.
It is obvious that the shunting resistance 4 might be placed in the lead 1
instead of lead 2.
Our invention is obviously applicable not only to electrolytic meters of the
more ordinary types but also, for example, to electrolytic meters of the osmotic
type.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that
what we claim is:-
1. The improvement connected with electrolytic meters which consists in the
method of overcoming the effects of back electro-motive force substantially as
set forth.
2. The means for overcoming the effects of back electro-motive force in
electrolytic meters substantially as set forth.
3. The combination of an electrolytic meter and an extraneous source of
electro-motive force in shunt to an ohmic resistance substantially as and for the
purpose set forth.
Dated this 21st day of August 1000