Improvements in or relating to the Electro Deposition of Metals
Year: 1890

page_text: Date of Application, 15th Oct., 1890
Complete Specification Left, 15th July, 1891-Accepted, 15th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Electro Deposition of Metals:
A communication from LOUIS ALBERT JOSEPH JORAY, of 2, Boulevard de
Strasbourg, Paris, in the Republic of France, Mechanical Engineer.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex
M.I.M.E., do hereby declare the nature of this invention to be as follows:-
The main object of this invention is to render bright and lustrous electro-chemical
deposits while they are being formed on articles of metal, generally of a small
size. It consists in submitting the articles under treatment to friction obtained
either by the mutual contact of the pieces themselves which it is desired to polish
and which are set in motion for the purpose; or by placing such pieces in contact
with other bodies specially provided therefor and immersed in the electrolytic
bath.
The invention when applied in practice may be carried out by placing articles of
metal which it is desired to plate into the electrolytic bath in which terminate the
anode and cathode of the source of electricity employed; in further placing
therein other metal bodies if necessary; and then imparting to the bath containing
all such pieces one or more of a variety of movements, either simultaneous or con-
secutive, rectilinear, rotary or otherwise so that the said metal pieces are kept
either in constant or intermittent motion and caused to come into frictional contact
either with other pieces under treatment or with the accessory bodies provided for
the purpose, the final result being a bright, lustrous and adhesive deposit.
The reservoir to be employed for the galvanic bath is cast in one piece with its
cover plate which is attached to the end of a shaft resting in bearings in a special
frame
:
This frame is made to oscillate on its bearings in the main frame. This main
supporting frame preferably consists of a wooden structure though it may be
constructed of any other suitable material.
In addition to the support afforded to the cylindrical reservoir by the bearings
two rollers are provided in the frame for its back portion to rest and move upon.
This reservoir containing the chemical bath is to receive the articles it is desired
to provide with a metallic deposit or coating, and also small metallic pieces intended
to act as polishing agents when the articles to be provided with such coating aro
engraved embossed, or otherwise decorated. The anode and the cathode pass through
the centre of the shaft. The cathode which terminates practically at the centro
of the cylindrical reservoir is preferably formed of four conductors branching off
from the main piece.
The anode is a cylindrical conductor applied to the inner wall of the reservoir.
An insulator is interposed between the anode and cathode' but nearer to the anode
though leaving a small space between it and such anode.
Within the anode there may be applied a spiral or helix the object of which is
to displace the liquid as a consequence of the movements imparted to the
reservoir.
Suitable switches or commutators may be employed.
The reservoir is closed by a cover which is bolted to its flange. This cover
carries the valve provided for the escape of the gases forming during the electrolytic
process.
When it is desired to fill the reservoir with liquid and place therein the articles
to be treated, it is raised vertically by tilting its frame so that the shaft is turned
downwardly.
During the operation, the reservoir being restored to its original position receives

page_text: a slow rotary motion and also a horizontal reciprocating motion. For this purpose
a driving shaft is arranged in the upper portion of the main frame and provided
with fast pulley and loose pulleys. Upon the central portion of this shaft is
mounted a worm whereby in conjunction with a worm wheel arranged on an
intermediate shaft motion is conveyed to the reservoir.
The shaft carries two gear wheels of unequal diameter and these wheels
respectively engage with corresponding wheels loosely mounted upon an inner shaft
provided with friction.clutches. By this arrangement motion of various speeds
may be imparted to the shaft as required and according as either set of the gear
wheels are effectively in operation at the time.
Another toothed wheel secured to the shaft gears with a pinion mounted on the
shaft of the reservoir.
The horizontal reciprocating motion takes place simultaneously with the before
mentioned rotary motion. It is produced by an eccentric mounted on the main
shaft whose rod engages with the arm of a rocking bell-crank lever, the arm of
this lever is a forked end arm between the cheeks of a sleeve secured to the shaft so
that its oscillations are converted into alternate rectilinear movements in which
the bath participates. The extent of such rectilinear displacement may be varied
by altering the point of contact of the eccentric rod with the lever arm.
These mechanical effects simultaneously with the electrolytic action result in the
formation on the surfaces of the articles under treatment of extremely adhesive
metal deposits having a highly polished and bright appearance.
The above described mechanism is given as an illustration to show how this
invention may be carried into effect, and not as the only means by which the desired
end may be attained.
D
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DORA
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W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to the Electro Deposition of Metals.
A communication from LouIS ALBERT JOSEPH JORAY, of 2, Bd. de Strasbourg,
Paris, in the Republic of France, Mechanical Engineer.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., do hereby declare the nature of this invention and in what manner tho
same is to be performed, to be particularly described and ascertained in and by
the following statement:---
The main object of this invention is to render bright and lustrous electro-chemical
deposits, while they are being formed on articles of metal, generally of a small size.
It consists in submitting the articles under treatment to friction obtained either by
the mutual contact of the pieces themselves which it is desired to polish and which
are set in motion for the purpose; or by placing such pieces in contact with other
bodies specially provided therefor and immersed in the electrolytic bath.
The invention when applied in practice may be carried out by placing articles
of metal which it is desired to plate into the electrolytic bath in which terminate the
anode and cathode of the source of electricity employed; in further placing therein
other metal bodies, if necessary; and then imparting to the bath containing all
such pieces one or more of a variety of movements, either simultaneous or con-
secutive, rectilinear, rotary or otherwise, so that the said metal pieces are kept
either in constant or intermittent motion and caused to come into frictional contact
either with other pieces under treatment or with the accessory bodies provided for
the purpose; the final result being a bright, lustrous and adhesive deposit.
In the accompanying drawings apparatus is shown whereby the novel industrial
result herein indicated may be best obtained.

page_text: Fig. 1. is a side elevation, Fig. 2 a sectional end elevation and Fig. 3 a plan of
the apparatus.
Fig. 4 is a longitudinal section of the reservoir adapted to contain the bathi
and
.
Fig. 5 is a cross section thereof.
The reservoir to be employed for the galvanic bath is cast is one piece with its
cover plate a which is attached to the end of a shaft b resting in bearings 63 in a
special frame c.
This frame e is provided with journals or trunnions e adapted to oscillato in
bearings dd supported on the main frame c. This main supporting framo preferably
consists of a wooden structure though it may be constructed of any other suitable
material.
In addition to the support afforded to the cylindrical reservoir a by the
bearings two rollers are provided in the frame c for its back portion to
rest and move upon.
This reservoir a containing the chemical bath is to receive the articles it is
desired to provide with a metallic deposit or coating, and also small metallic pieces
intended to act as polishing agents when the articles to be provided with such
coating are engraved embossed, or otherwise decorated. The anode 2 and tho
cathoden pass through the centre of the shaft b. The cathode which terminates
practically at the centre of theo cylindrical reservoir is preferably formed of four
conductors n' n² n³n branching off from the main piece.
The anode p is a cylindrical conductor applied to.the inner wall of the reservoir.
An insulator is interposed between the anode and cathode, but nearer to the anodo,
though leaving a small space between it and such anode.
Within the anode there may be applied a spiral or helix J the object of which
is to displace the liquid as a consequence of the movements imparted to the
reservoir a.
Suitable switches or commutators CC may be employed. :
The reservoir is closed by a cover a which is bolted to its flange. This cover
carries the valves provided for the escape of the gases forming during the electro-
lytic process.
When it is desired to fill the reservoir with liquid and place therein the articles
to be treated it is raised vertically by tilting its frame e so that the shaft bis turned
downwardly.
During the operation the reservoir a being restored to its original position in
which it is represented in the accompanying drawings receives a slow rotary motion
and also a horizontal reciprocating motion. For this purpose a driving shaft o is.
arranged in the upper portion of the main frame and provided with fast and loose
pulleys o o. Upon the central portion of this shaft is mounted a worm v whereby
in conjunction with a worm wheel farranged on an intermediate shaft g motion is
conveyed to the reservoir.
The shaft carries two gear wheels hk of unequal diameter and the wheels fhk
respectively engage with corresponding wheels f¹¹ loosely mounted upon an
inner shaft provided with clutches fh. By this arrangement motion of
various speeds may be imparted to the shaft as required and according as either
set of the gear-wheels for kare effectively in operation at the time.
Another toothed wheel m secured to the shaft l gears with a pinion q mounted on
the shaft of the reservoir a.
The horizontal reciprocating motion takes place simultaneously with the before
mentioned rotary motion. It is produced by an eccentric 7 mounted on the main
shaft o and whose rod engages with the arm of a rocking bell-crank levert t
the arm of which is forked at its end and engages between the flanges of a
sleeve secured to the shaft b so that its oscillations are converted into alternate
rectilinear movements in which the bath a participates. The extent of such
rectilinear displacement may be varied by altering the point of contact of the
eccentric rod with the lever arm t.

page_text: These mechanical effects simultaneously with the electrolytic action result in the
formation on the surfaces of the articles under treatment of extremely adhesive
metal deposits having a highly polished and bright appearance.
The above described mechanism is given as an illustration to show how this
invention may be carried into effect and not as the only means by which the desired
end may be attained.
Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondent, and in what manner the
same is to be performed, I declare that what I claim is:-
1. The method herein described of obtaining bright and adhesive electro chemical
deposits upon articles of metal mainly consisting in submitting the said articles to
friction at the same time as they undergo the electro-chemical or electrolytic action.
2. In the electro deposition of metal upon metallic articles the employment of
apparatus for imparting rotary and reciprocating motion to the vessel containing
the bath and the articles to be covered with a deposit while these articles are
undergoing electrolytic action substantially as described.
3. Apparatus such as described in which the bath is adapted to rotate with the
required speed while it is being reciprocated horizontally this bath being mounted
upon a pivotted support enabling it to be turned to a vertical position to gain access
to the interior of the bath or the vessel containing it substantially as described and
illustrated in the accompanying drawings.
4. In apparatus such as described the arrangement of a cathode provided with
four or other number of rods and an anode applied against the inner wall of the
vessel or reservoir and an insulator arranged concentrically with and at a greater
or less distance from the anode substantially as described and illustrated in the
accompanying drawings.
5. In apparatus such as described the application to the anode of a spiral for the
purpose of displacing the electrolytic liquid during the complex movements of
the bath substantially as described and illustrated in the accompanying drawings.
6. The combination and arrangement of parts constituting the complete apparatus
for agitating articles while they are subjected to electro-deposition substantially as
described and illustrated in the accompanying drawings.
Dated this 15th day of July 1891
W. P. THOMPSON & BOULT,
Agents for the Applicant.