Covered Metallic Tubes.
Year: 1885

page_text: Covered Metallic Tubes.
We, FREDERICK MADELEY, of Ox Hill Handsworth in the County of Stafford,
Merchant, and ALBERT OLDHAм, of 126 Heathfield Road, Handsworth, aforesaid,
Brassfounder, do hereby declare the nature of said invention for "IMPROVEMENTS
THE MANUFACTURE OF EXTERNALLY COATED OR COVERED METALLIC TUBES "
to be as follows:-
IN
In the ordinary method of manufacturing brass-cased tubes, a strip of iron of
the necessary dimensions is turned up by drawing through a die or draw plate into
a tube so that the edges of the strip meet together but are not actually joined.
A strip of thin sheet brass is treated in the same way and a layer of solder having
been laid along the edges of it; is passed through the flame of an ordinary brazing
hearth by which means the solder is fused and a joint is made by the edges becoming
soldered or brazed together; the brass tube is then drawn over the open jointed
iron tube so as to form a casing.
The excrescences of solder are then filed or floated off and the tube is re-drawn
through a die and finally finished and lacquered.
In manufacturing cased or coated tubes according to our invention we dispense
with the sheet of brass to be drawn on to the iron tube, and commence by taking
a strip of good quality iron or steel of the required dimensions which we turn up
into a tube by drawing through a die or draw-plate, then we pickle it and solder
the joint which is then floated or filed in a manner similar to that adopted with an
ordinary brazed iron tube.
During these processes we take especial care to preserve the surface of the metal
and we afterwards re-draw and polish the iron or steel tube so produced until we
obtain a smooth cylindrical surface suitable for the further processes herein-after
described; this we prefer to do by a machine supplied with scrubber blocks (either
made of emery or charged with powdered emery and oil) as described in the
specification of application for Letters Patent No 13950 dated 21 October 1884
made by one of us the said Frederick Madeley, and Edward Flint, but it may also
be done in cases where a sufficiently good surface has been preserved by simply
re-drawing through the die or draw-plate. In lieu of the above described brazed
tube a welded joint tube may be substituted.

page_text: Having thus obtained a smooth cylindrical tube of the necessary diameter, we
treat it by the aid of electricity and so make a cyanide deposit of copper or brass
upon it; a suitable base of tin or other metal which can be attached to iron by
deposition or fusion may be here substituted. We then place the tube in a sulphate
of copper bath for the purpose of increasing the thickness of the copper deposit and
finally we place it in a bath containing a brass solution which completes the process
of deposition of metal as a substitute for the ordinary casing of thin sheet brass
but we may in some instances dispense with the use of the sulphate bath where the
thickness of the deposited metal is not a matter of importance. If fusion of brass
is resorted to no electro deposit is necessary. The polishing is effected by drawing
through a die or draw-plate either before or after the final bath or by hand rubbing
with list and rotten stone or by an automatic machine containing revolving hobs
of those or similar materials and finally we finish our metal coated tube by
lacquering it in the ordinary manner.
This process is also applicable to the production of what are known in the trade
as twisted or ornamental tubes which have heretofore been usually (if not always)
made of solid metal.

page_text: 133
MAUVI Напу Contou
Covered Metallic Tubes.
We, FREDERICK MADELEY of Ox Hill, Handsworth in the County of Stafford,
Merchant, and ALBERT OLDHAM of 126 Heathfield Road, Handsworth, aforesaid,
Brassfounder do hereby declare the nature of said invention for "IMPROVEMENTS
IN THE MANUFACTURE OF EXTERNALLY COATED OR COVERED METALLIC TUBES
"
and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement:―
In the ordinary method of manufacturing brass-cased-tubes, a strip of iron of the
necessary dimensions is turned up by drawing through a die or draw-plate into a
tube so that the edges of the plate meet together but are not actually joined. A
strip of thin sheet brass is treated, in the same way, and a layer of solder having
been laid along the edges of it, is passed through the flame of an ordinary brazing
hearth by which means the solder is fused and a joint is made by the edges
becoming soldered or brazed together; the brass tube is then drawn over the open
jointed iron tube so as to form a casing.
The excrescences of solder are then filed or floated off, and the tube is redrawn
through a die and finally finished and lacquered.
In manufacturing cased or coated tubes according to our invention we dispense
with the sheet of brass to be drawn on to the iron tube, and commence by taking
a strip of steel of the required dimensions which we turn up into a tube by drawing
through a die or draw-plate, then we pickle it and solder the joint which is then
floated or filed in a manner similar to that adopted with an ordinary brazed
iron tube.
During these processes we take especial care to preserve the surface of the metal
and we afterwards redraw and polish the steel tube so produced until we obtain a
smooth cylindrical surface suitable for the further processes hereinafter described;
this we prefer to do by a machine supplied with scrubber blocks (either made of
emery or charged with powdered emery and oil) as described in the specification of
Letters Patent No 13950 dated 21 October 1884.
In lieu of the above described brazed tube, a welded or solid drawn tube may
be used.
Having thus obtained a smooth cylindrical tube of the necessary diameter we
treat it by the aid of electricity and so make a cyanide deposit of copper or brass
upon it externally, access of the liquid in the bath to the interior of the tube being
prevented. A suitable base of tin or other metal may be here substituted. We
then place the tube in a sulphate of copper bath for the purpose of increasing the
thickness of the copper deposit and finally we place it in a bath containing a brass
solution which completes the process of deposition of metal as a substitute for
the ordinary casing of thin sheet brass, but we may in some instances dispense with
the use of the sulphate bath where the thickness of the deposited metal is not a
matter of importance. The polishing is effected by hand rubbing with list and
rotten stone or by an automatic machine containing revolving bobs of those or

page_text: similar materials and finally we finish our metal coated tube by lacquering it in the
ordinary manner.
This process is also applicable to the production of what are known in the trade
as twisted or ornamental tubes which have heretofore been usually (if not always)
made of solid metal.
Having now particularly described and ascertained the nature of said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. The hereindescribed method or process of making metallic cased or coated
tubes, consisting in first covering a steel tube that has been treated to obtain au
even surface, with a layer of metal which will not give rise to injurious action in a
brass or copper plating bath, the said layer being applied by electrical deposition
from a cyanide or alkaline solution, and then applying by electrical deposition a
final covering of brass with or without an intermediate layer of copper substantially
as described.
2. As a new article of manufacture an electrolytically brass coated steel tube,
with an intermediate layer of metal between the steel and the brass, the said
intermediate layer being applied by deposition from a cyanide or alkaline solution
Bubstantially as described.