IMPROVEMENTS IN CHEMICAL DEPOSIT CURRENT METERS USED IN CHARGING AND DISCHARGING PROVISIONAL SPECIFICATION
Year: 1883

page_text: LETTERS PATENT to Sir David Salomons of Broomhill Tunbridge Wells in
"
the County of Kent Baronet, for an Invention of IMPROVEMENTS IN
CHEMICAL DEPOSIT CURRENT METERS USED IN CHARGING AND DISCHARGING
PROVISIONAL SPECIFICATION left by the said Sir David Salomons at the
Office of the Commissioners of Patents on the 16th July 1883.
Sir DAVID SALOMONS of Broomhill Tunbridge Wells in the County of
Kent, Baronet, " IMPROVEMENTS IN CHEMICAL DEPOSIT CURRENT METERS USED
DISCHARGING ACCUMULATORS EMPLOYED FOR STORING
IN
CHARGING
ELECTRICITY"
AND
My invention relates to improvements in chemical deposit current meters used
in the process of charging and discharging accumulators employed for storing
electricity.
At present the method of employing a portion of the current whilst charging the
accumulators by a dynamo machine or otherwise produce a deposit of metallic
copper (or. zinc or other metal) which is redissolved by the current being reversed
on discharging the accumulators to serve as a meter is defective in as much as the
loss by conversion is not registered.
The loss between charge and discharge by the. conversion is not registered this
loss being fully ten per cent. These meters or instruments are used on a shunt
circuit.
According to my improvements I propose to remedy the aforesaid defects by
placing a "resistance" in the shunt current circuit of the meter when charging and
removing the resistance when discharging.
The method of inserting and removing this resistance is to be effected by a
"relay" (polarized or otherwise) or by any other suitable means so that a current

page_text: in one direction shall actuate mechanism to place the resistance in the shunt current
and the current being reversed the resistance shall be removed.
When the current is discharging the deposit goes on at a certain rate proportional
to the Ampere hours taken out, and it is required in charging that ten per cent
(more or less) more Ampere hours shall be put in than was taken out to make up
the loss by conversion.
Now by inserting a proper resistance (which is a "constant" in any definite
"installation") when charging from the dynamo machine or otherwise.
The deposit can be made to exceed in weight the quantity dissolved by
discharging the accumulators by any amount desired according to the value of the
resistance inserted.
The charging may either dissolve the deposit or form it and vice versa, By
resistance is meant electrical resistance.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Sir David Salomons in the Patent Office on the 16th January
1884.
Sir DAVID SALOMONS of Broomhill, Tunbridge Wells in the County of
Kent, Baronet "IMPROVEMENTS IN CHEMICAL DEPOSIT CURRENT METERS USED
CHARGING AND DISCHARGING ACCUMULATORS EMPLOYED FOR STORING
IN
ELECTRICITY
"3
My invention relates to improvements in chemical deposit current meters used
in the process of charging and discharging accumulators employed for storing
electricity
At present the method of employing a portion of the current whilst charging the
accumulators by a dynamo machine or otherwise produces a deposit of metallic
copper (or zinc or other nietal) which is redissolved by the current being reversed
on discharging the accumulators to serve as a meter is defective inasmuch as the
loss by conversion is not registered.
The loss between charge and discharge by the conversion is not registered this
loss being fully ten per cent. These meters or instruments are used on a shunt
circuit.
According to my improvements I propose to remedy the aforesaid defects by
placing a "resistance" in the shunt current circuit of the meter when charging and
removing the resistance when discharging.
"
The method of inserting and removing this resistance is to be effected' by a
relay" (polarized or otherwise) or by any other suitable means so that a current
in one direction shall actuate mechanism to place the resistance in the shunt current
and the current being reversed the resistance shall be removed.
When the current is discharging the deposit goes on at a certain rate proportional
to the Ampere hours taken out and it is required in charging that ten per cent
(more or less) more Ampere hours shall be put in than was taken out to make up
the loss by conversion.
Now by inserting a proper resistance (which is a "constant" in any definite
"installation") when charging from the dynamo machine or otherwise the deposit
can be made to exceed in weight the quantity dissolved by discharging the
accumulators by any amount desired according to the value of the resistance
inserted.
The charging may either dissolve the deposit or form it and vice versa.
By resistance is meant electrical resistance.
Having thus described the nature of my invention and the manner of performing
or carrying the same into practice what I claim is :-
The improved arrangement and application of chemical deposit current meters
used in charging and discharging accumulators by placing a "resistance" in the
shunt current circuit of the meter when charging an accumulator and removing the
resistance when discharging it substantially in the manner and for the purpose
hereinbefore fully described.
In witness whereof I the said Sir David Salomons have hereunto set my hand
and seal this Eleventh day of January One thousand eight hundred and eighty
four.
DAVID L SALOMONS (L.S.)