Improvements Connected with or Applicable to Baths or Vessels Containing Liquids Used in Electro-plating or Dyeing, or the Electrolyte of Storage Batteries and the like.
Year: 1888

page_text: Date of Application, 19th June, 1888
Complete Specification Left, 19th Mar., 1889
Complete Specification Accepted, 11th May, 1889
Improvements Connected with or Applicable to Baths or Vessels
Containing Liquids Used in Electro-plating or Dyeing, or the
Electrolyte of Storage Batteries and the like.
We EDWARD HOPKINSON of Salford Iron Works Manchester Engineer and DAVID
APPLETON of 28 George Street Cheetham Hill Manchester Electro Plater do hereby
declare the nature of this Invention to be as follows:-
The object of our Invention is more particularly to provide means for obtaining a
uniform strength and density of liquor throughout baths or vessels containing dyeing
liquids or electrolytes for batteries or the like and to accomplish this we circulate the
liquor or electrolyte by means of a centrifugal or other circulating pump, the liquor
being drawn off from the upper portion of the baths or vessel and then forced up
through perforated pipes or passages arranged at the bottom or the sides (or both)
of the bath or vessel. By this means the liquor is constantly agitated and kept at one
uniform density throughout consequently when our Invention is used in connection
with electroplating baths or for copper refining the deposit is made in much less time
and is harder than is the case when our Invention is not used. With dye-becks or
cisterns our Invention overcomes the difficulty of uneven depth of colour due to the
dye liquor not being of the same density and quality throughout and when applied
to Electrical Accumulators or Storage Batteries the results obtained are better as
the action of the electrolyte on the plates is thus more uniform, the plates last longer
and work more satisfactorily.
In baths for Electro-plating purposes the strength of the liquor is still further
maintained by constructing the tank bath or vessel with double sides the inner one
being perforated and placing the necessary salts in the cavity between the two the
liquor is thus constantly dissolving fresh salts and consequently the strength of the
solution is maintained.
58.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C.,
Agents for the said Edward Hopkinson
and David Appleton.

page_text: Improvements Connected with or Applicable to Baths or Vessels
Containing Liquids Used in Electro-plating or Dyeing, or the
Electrolyte of Storage Batteries and the like.
We EDWARD HOPKINSON, of Salford Iron Works, Manchester, Engineer, and
DAVID APPLETON, of 28 George Street, Cheetham Hill, Manchester, Electro Plater,
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:
The object of our invention which we will describe with reference to the accom-
panying drawings is more particularly to provide means for obtaining a uniform
strength and density of liquor throughout baths or vessels containing dyeing liquids
or electrolytes for batteries or the like.
Figure 1 is a longitudinal section and Figure 2 a transverse section of a
vessel or bath suitable for use in dyeing or for the refinement of copper or for
similar purposes and Figures 3 and 4 are similar views of a vessel or bath suitable
for electro-plating purposes constructed according to our invention.
According to our invention the liquor or electrolyte is caused to circulate through
the liquid containing vessel or bath Ĉ by means of a centrifugal or other circulating
pump, A being the pipe leading from the delivery or outlet of the pump to the interior
of the vessel the said pipe entering the top of the vessel or bath and extending
to the bottom thereof as shown at b where the said pipe is fitted with several
perforated branch pipes a through which the liquid passes into the bath. B is the
suction pipe of the pump which pipe descends inside the bath to below the surface of
the liquor therein the said liquor being drawn off by the pump from the upper portion
of the bath or vessel through the pipe B and then forced by the pump through the
delivery pipe A and the perforations in the pipes a arranged at the bottom or at the
sides (or both) of the bath or vessel. By this means the liquor is constantly agitated
and kept at one uniform density throughout; consequently when our invention is used
in connection with electro plating baths or for copper refining the deposit is made in
much less time and is harder than is the case when our invention is not used.
When our invention is applied to dye-becks or vessels employed in dyeing, uneven
depth of colour, due to the dye liquor not being of the same density and quality
throughout, is overcome, and when applied to electrical accumulators or storage
batteries better results are obtained than heretofore as the action of the electrolyte
on the plates is more uniform and the plates last longer and work more satisfactorily.
For electroplating purposes the strength of the liquor may be still further
maintained by constructing the tank vessel or bath with double sides or double bottom
or with both double sides and bottom as shown in Figures 3 and 4 the inner sides b
and bottom c being perforated and arranged at a distance from the main or outer
sides and bottom of the bath or vessel C so as to provide a space or spaces d in which

page_text: the necessary electrolytic salts are placed. Into and through the space or spaces d and
through the bath the liquor is constantly circulated by means of the pump and the
pipes A, a and B as hereinbefore described, thereby adding fresh salts to the solution
and consequently maintaining the strength of the said solution.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In combination with baths or vessels used in the process of electro-plating
refining copper and other metals, and for like processes, a pump and circulating
pipes for circulating the liquid through the vessels substantially as and for the purpose
herein before described.
2. In dye-becks or vessels used in dyeing the use of a pump and circulating pipes
for circulating the dye liquor, substantially as and for the purpose herein before
described.
3. In accumulators or storage batteries, the use of a pump and circulating pipes,
for effecting a circulation of the electrolytic fluid, substantially as and for the purpose
hereinbefore described.
4. Baths or vessels employed in the process of electro-plating having double sides
or bottom or double sides and bottom-the inner sides and bottom being perforated
and arranged at a distance from the outer sides and bottom so as to provide a
space or spaces to contain electrolytic salts substantially as and for the purpose
herein before described with reference to Figures 3 and 4 of the accompanying
drawings.
5. The combination with the subject matter of the last preceding claiming clause
of a pump and circulating pipes for effecting a circulation of the liquid through the
vessel substantially as and for the purpose herein before described.
1000
J. H. JOHNSON & Co.,
Agents.