Improvements in the Manufacture or Production of Lead Lined or Lead Coated Pipes and Tubes.
Year: 1898

page_text: Date of Application, 4th Nov., 1898.
Complete Specification Left, 2nd Aug., 1899-Accepted, 16th Sept., 1899
I
Improvements in the Manufacture or Production of Lead Lined or
Lead Coated Pipes and Tubes.
I, HENRY WALL DAVIS, of Hallein bei Salzburg, in the Austrian Empire,
Paper Manufacturer, do hereby declare the nature of this invention to be as
follows:-
1
This invention relates to the method of and means for coating and lining
metallic pipes and tubes with lead so as to enable them to resist the action of acids
and corrosive fluids.
According to my present invention, I prefer to employ copper as the material
of construction of the pipe or tube, but I do not limit myself to this metal.
I will first describe the method of procedure which I may employ in the case
of a copper tube to be lined with lead. A mandrel of the necessary length and
having the required diameter with just sufficient draft or taper to permit the
lined tube being drawn off, having been provided, I cover or coat it with lead.
The mandrel is then removed to an electrolytic bath, or to a succession of such
baths in which it is coated to the required thickness with copper. For example,
the first deposit may be made in a cyanide or alkaline bath, and when the lead is
completely covered, the deposit may be completed in a copper sulphate bath. The
lined tube may then be withdrawn from the mandrel.
If the pipe or tube is to be coated with lead, I may either deposit the copper
tube on a mandrel by electrolysis, or place thereon an already formed tube or
pipe of copper. This may then be placed in a suitable bath and the lead be
deposited thereon by electrolysis with consolidation, if necessary, by rubbing,
burnishing or pressure.
I do not limit myself to the methods of procedure hereinbefore described, as
they may be obviously varied without departing from my invention, the essential
feature of which is the electrodeposition of the one metal upon the other.
Dated this 2nd day of Navamber AD 1808
W. E. HEYS & SON,
Agents for the Applicant.
Improvements in the Manufacture or Production of Lead Lined or
Lead Coated Pipes and Tubes:
I, HENRY WALL DAVIS, of Hallein bei Salzburg, in the Austrian Empire,
Paper Manufacturer, do hereby declare the nature of this invention, and in what
[Price S

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement: ―
This invention relates to the method of and means for coating and lining
metallic pipes and tubes with lead so as to enable them to resist the action of acids
and of corrosive fluids.
According to my present invention, I may employ any suitable hard metal, and
in particular, copper, as the material of construction of the pipe or tube to be
lined or coated with lead.
I will first describe the method of procedure which I may employ in the case
of a copper tube or pipe to be lined with lead. A mandrel having the necessary
length and required diameter with just sufficient draft or taper to permit the
completed lined tube or pipe being drawn off, having been provided, I cover or
coat it with lead. This covering or coating of the mandrel with lead may be
accomplished by means of either of the well known processes which may be
adopted. For example, the lead may be cast upon the mandrel, or the mandrel
may be covered with lead sheet, the contiguous edges of which are burnt together
so as to form a homogeneous and complete coating. The coated mandrel is then
placed in an electrolytic vat or in a succession of such vats with suitable anodes
in which it is coated to the required thickness with copper. For example, the
first deposit of copper on the lead may be made in a cyanide or alkaline bath,
and when the lead has been completely covered, the deposit may be completed
in a copper sulphate bath. After removal from the bath, the lined tube may be
drawn off the mandrel.
If the pipe or tube is to be coated, instead of being lined with lead, I may
either deposit the copper tube on the mandrel by electrolysis, or place thereon an
already formed tube or pipe of copper. This may then be placed in a suitable
bath and the lead be deposited thereon by electrolysis. The well known process
already commonly employed in the formation by electrolysis of tubular articles,
and in which the article is continuously rotated during deposition, may be used
for the purposes of this invention, and this process may be accompanied by a
rubbing, pressing, or burnishing process.
I do not limit myself to the methods of procedure herein before described, as
they may be obviously varied without departing from my invention, the essential
feature of which is the electrodeposition of the one metal upon the other.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. In the manufacture of lead lined or lead coated tubes, depositing the external
metal upon the internal metal substantially as and by the means herein before
described.
2. As new articles of manufacture, lead lined or lead coated tubes produced
substantially as and by the means and for the purpose herein before described.
Dated this 31st day of August A.D. 1899.
W. E. HEYS & SON,
Agents for the Applicants.