Improvements in the Manufacture of Wire, Strips, and the like by Electro-deposition.
Year: 1892

page_text: Date of Application, 4th July, 1892
Complete Specification Left, 4th May, 1893—Accepted. 10th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Wire, Strips, and the like by
Electro-deposition.
I, RICHARD DAVID SANDERS, of Hartfield House, Eastbourne, in the County
of Sussex, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in the manufacture of wire, strips, and the
like by electro-deposition upon a grooved, spiral, or helical surface, or mandrel,
somewhat similar to that described in the Specification of my former Patent
No. 7960 of 1891.
In depositing metal upon such surfaces as hitherto constructed a difficulty has
been experienced in confining the deposit to the metallic or depositing surfaces
or grooves and as a consequence the metal is deposited in irregular shapes
unsuitable for commercial purposes.
The object of my invention is to provide means whereby on a metallic surface
of the kind herein before described a wire or strip of practically uniform thickness
and form may be obtained.
In carrying out this part of my invention I place the insulating material so that
the metallic surface on which the deposit is made is not the full width of the bottom
of the groove whereby as the deposit grows the side clearance spaces will allow
the strips to broaden as the thickening proceeds.
In some cases I deposit the metal upon semi-circular or curved metallic surfaces
in which case I obtain a channel shaped strip which can subsequently be flattened,
or upon knife-edge-projections whereby I obtain practically a round deposit the
groove formed by the knife-edge being closed up during the subsequent drawing
process.
When it is necessary to burnish the metal during, or after deposition, I can
arrange the mandrel or matrix in such a manner that by revolving, or tilting it, a
weighted burnisher is caused to slide or roll over the deposited metal without any
independent mechanism.
Din uh I
.
ST1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Wire, Strips, and the like by
Electro-deposition.
I, RICHARD DAVID SANDERS, of Hartfield House, Eastbourne, in the County
of Sussex, 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 :-
My invention relates to improvements in the manufacture of wire, strips, and the
like by electro-deposition upon a grooved, spiral or helical surface, or mandrel,
somewhat similar to that described in the Specification of my former Patent
No. 7960 of 1891.
In depositing metal upon such surfaces as hitherto constructed a difficulty has
been experienced in confining the deposit to the metallic or depositing surfaces or
grooves and as a consequence the metal is deposited in irregular shapes unsuitable
for commercial nurnngee

page_text: The object of my invention is to provide means whereby a wire or strip of
practically uniform thickness and form may be obtained.
In carrying out this part of my invention I form the metallic surfaces on which
the deposit is made with clearance spaces so that as the deposition proceeds the
strips will broaden and thicken simultaneously.
Af
In some cases I deposit the metal upon semi-circular or curved metallic surfaces,
in which case I obtain a channel-shaped strip which can subsequently be flattened,
or upon knife-edge projections whereby I obtain practically a round deposit, the
groove formed by the knife-edge being closed up during the subsequent drawing
process.
When it is necessary to rub the metal during, or after deposition I can arrange
the mandrel or matrix in such a manner that by revolving, or tilting it, a rubber
is caused to slide or roll over the deposited metal without any independent
mechanism.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawings, the figures of which are hereinafter
described and in which similar letters of reference indicate similar parts.
Figures 1 and 2 shew an elevation and section of a grooved surface or matrix for
the manufacture of wire or strips, a, a being plates of metal the edges of which
present metallic surfaces upon which the wire or strip is to be deposited, and b, b, b
boards of wood or other insulating material which alternate with the plates a, a.
Between the plates a, a and boards b, b, bare placed layers c, c, c, c of insulating
material or stopping whereby the distance between the boards b, b, b is greater than
the width of the metallic depositing surfaces.
Figures 3 and 4 shew in plan and elevation a matrix somewhat similarly con-
structed to that shewn in Figures and 2 but adapted for making longer lengths of
wire or strips by connecting the two sets of side grooves at one end.
Figures 5, 6 and 7 shew in plan, elevation and section a matrix upon which the
metal is deposited spirally in great lengths. This form of matrix may be cylindrical
if preferred.
It will be seen that in all the matrices described the metallic surface upon which
the deposit takes place is not the full width of the bottom of the groove or
depositing surface whereby as the deposit grows, the side clearance spaces will
allow the strips to broaden as the thickening proceeds until the desired section or
pattern is finally obtained.
It will be readily understood that a great variety of sections may in this way be
deposited and Figures 8, 9, 10, 11, 12 and 13, and Figures 14 and 15 are sectional
views intended to shew how wires or strips of segmental, circular, semi-circular, and
channel-shaped sections may be obtained.
In the arrangement, shewn in Figure 8 d indicates a portion of a metal cylinder
upon the surface of which I cut or form a fine thread e and having filled up the
spaces between the threads with any suitable insulating material such as bitumen,
wax or the like I turn or cut the thread and insulator down to a smooth level
surface as clearly shewn. By this means a fine metallic line or surface a is exposed
without edges.
In the arrangement shewn in Figures 9 and 10 the depositing surfaces are knife-
edges in shape and formed either by being cut upon the surface of the metal
cylinder or otherwise.
It will be seen that the metal will be deposited in an approximately circular
form with a groove in it, which groove can be closed up by the subsequent process
of drawing.
Sometimes the metallic depositing surfaces are formed by introducing a thin
metal strip firmly cemented between the surface of a non-conducting mandrel h
and a strip of ebonite or hard india-rubber or other suitable material as in
Figure 11, or between two pieces of the same material as in Figure 12. The
deposit will, in the arrangement shewn in Figure 11, take place upon the edges a
of the strip fin an approximately quadrantal shape, and in the arrangement shewn

page_text: in Figure 12 in a semi-circular shape, both of which can easily be removed without
destroying the insulating surfaces and both of which are suitable for drawing
into wire.
In the manufacture of heavy strips I advantageously deposit them upon a cathode
constructed in the manner illustrated in Figure 13.
In Figures 14 and 15 I shew a depositing surface formed by coiling up a band
of metal like a watch-spring and filling in the spaces with any suitable cement.
When the flat sides are turned or cut off to a level surface the metal will be deposited
upon the exposed edges a of the said metal band.
It will be noticed that in all these forms the metallic surfaces upon which the
deposit takes place is not confined, but is so arranged that the deposited metal is
free to grow both vertically and horizontally until the required section' has finally
been obtained as fully explained with reference to Figures 1 to 7.
When it is required to rub the metal during deposition, I employ a matrix of the
form shewn in Figure 1 but with grooves upon one side only and I mount this
matrix in the depositing tank in such a manner that by any suitable tilting or
oscillating mechanism a roller or rubber is caused to travel over the surface of the
deposited metal. This will be understood by reference to Figure 16 in which j is
the matrix in the tank k, and the roller or rubber of sufficient weight to smooth
the surface of the deposited metal.
When the matrix is tilted or oscillated the roller or rubber will travel from end
to end.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :--
1. In the manufacture of wire, strips, or the like by electro-deposition, a matrix
or mandrel (whether grooved, spiral, or otherwise) having the metallic surface or
base upon which the metal is to be deposited and the insulated divisions arranged
in such a manner that the metal is at liberty to deposit itself both vertically and
horizontally until it has assumed the required shape or section, substantially as
described with reference to the accompanying drawings.
2. In the manufacture of wire, strips or the like a matrix adapted to be oscillated
in combination with a roller or rubber adapted to traverse the same during such
oscillation, substantiallly as described.
Dated the 4th day of May 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.