Improvements in or connected with the Manufacture or Production of Zinc Coated Wire and other Zinc Coated Metallic Articles...
Year: 1894

page_text: Date of Application, 17th Oct., 1894
Complete Specification Left; 17th July, 1895-Accepted, 17th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in or connected with the Manufacture or Production
of Zinc Coated Wire and other Zinc Coated Metallic Articles...
We, THE COWPER-COLES GALVANIZING SYNDICATE LIMITED of 39 Victoria
Street in the City of Westminster and SHERARD OSBOKN COWPER-COLES of
16 Adam Street, Manchester Square in the County of Middlesex, Engineer do
hereby declare the nature of this invention to be as follows:-
This invention has for its object to provide zinc coated metallic wires or other
zinc coated metal articles with rapidity and economy and of good appearance.
According to this invention we apply to the metal to be coated zine (including of
course in that term auy suitable zinc compound) by electro-deposition which we
effect rapidly by the use of a strong electric current. In the case of metal wires
or the like forms of metal in continuous lengths the deposition can be effected as
the wires or lengths of metal are passed through the electrolytic cell or cells.
Finely divided zinc may be maintained in suspension in the electrolyte to expedite
and improve the deposition. The product of this operation has a covering of
tough or granulated zinc having a matt or dead appearance and although the zinc
coating is sufficient to protect the metal it has not a sufficiently bright or smooth
appearance to render it commercially available. In order to give it a bright or
smooth appearance the wire or other article is, after it is removed or passes from
the zincking bath or baths passed through a bath or baths of a metal or alloy of
metals which has a lower melting point than zinc and afterwards through or
between rubbers of asbestos or other suitable material which will remove any
surplus of the said metal or combination of metals but will not remove the zinc
as the latter is not in a condition to be removed thereby. The product is a zine
coated article which has been rapidly produced and is of good appearance. Or in
place of employing a metal or alloy of metals as herein before last mentioned we
may after zincking treat the article in a bath which will form in the pores of the
coating oxide of zinc from part of the zinc, or we may treat the zinc coated article
in a bath of a solution of cadmium or metal electro positive to zinc, with or without
the application of an electric current so as to cause the metal to enter the pores of
the zinc and form a protective film therefor.
Or the zinc coated articles may be treated with a substance which will enter and
fill the pores of the zinc and give it a glazed or smooth appearance such for
instance as silicate of soda or liquid glass or vitreous compounds.
Dated the 17th day of October 1894.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, W.C., Agents.

page_text: Improvements in or connected with the Manufacture or Production
of Zinc Coated Wire and other Zinc Coated Metallic Articles.
We, THE COWPER-COLES GALVANIZING SYNDICATE LIMITED of 39 Victoria
Street, in the City of Westminster, and SHERARD OSBORN COWPER-COLES of
16 Adam Street Manchester Square, in the County of Middlesex 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:-
This invention has for its object to produce zinc coated metallic wires, or other
zinc coated metal articles,, with rapidity and, economy and of good appearance.
According to this invention we apply, to the metal to be coated, zinc (including of
course in that term any, suitable: zinc compound), by electro-deposition which we
effect rapidly by the use of a strong electric current.. A current, of 100 amperes
or upwards per square foot of cathode surface may be used. In the case of metal
wires, or the like forms of metal in continuous lengths, the deposition.can be.effected as
the wires, or lengths, of metal are passed through the electrolytic cell, or cells. Finely
divided zinc may be maintained in suspension in the electrolyte to expedite and
improve the deposition. The product of' this, operation has a covering of tough, or
granulated, zinc, having a matt, or dead, appearance and although the zinc coating
is sufficient to protect the metal it has not a sufficiently bright, or smooth,
appearance to render it commercially available. In order to give it a bright, or
smooth, appearance, the wire, or other article, is, after it is removed, or passes,
from the zincing Bath, or baths, passed, through a bath, or baths, of a metal, or
alloy of metals, which has,a lower melting point than lias zinc (good results .are
obtained with a bath of tin 50 parts lead 25 parts and cadmium 25 parts by weight
but we do not limit ourselves to these) and afterwards through, or between,
rubbers of asbestos, or other, suitable material, which will remove any surplus of
the said metal, or combination of metals, but will not remove the zinc, as, the
latter is not in a condition to be removed thereby. The product is a. zinc coated
article which has been rapidly produced and is of good appearance. Or in place
of employing a metal, or alloy of metals, as herein before list mentioned,, we may,
after zincing, treat the article in a bath which. will form, in, the pores of the
coating, oxide of zinc from part of the zinc, or we may treat the. zinc coated
article in a bath of a solution of cadmium, or metal electro-positive to zinc, with,
or without, the application of an electric current, so as to cause the metal to enter
the pores of the zinc and form a protective film therefor.
Or the zinc coated articles may be treated with a substance which will enter and
fill the pores of the zinc and give it a glazed; or, smooth, appearance, such,, for
instance, as silicate of soda or liquid glass, or vitreous compounds.
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. The manufacture of zinc coated, wire or other zinc coated metal articles, by
electrolytically depositing, as aforesaid, zinc, (or zinc compound) on the wire, or
article to be coated, and afterwards applying a metal, or alloy, which has a lower
melting point than has zinc and then passing the wire, or article, between rubbers
substantially as herein before described.
2. The manufacture of zinc coated wire, or other zinc coated metal articles by
electrolytically depositing, as aforesaid, zinc (or zinc compound) on the wire, or
article, to be coated, and then subjecting the coated wire, or article, to a process

page_text: which will form oxide of zinc in the pores of the coating, substantially as
hereinbefore described.
3. The manufacture of zinc coated wire, or other zinc coated metal articles, by
electrolytically depositing, as aforesaid, zinc (or zinc compound) on the wire, or
article, to be coated, and then applying a coating of cadmium, or metal electro-
positive to zinc, substantially as herein before described.
4. The manufacture of zinc coated wires, or other zinc coated metal articles, by
electrolytically depositing, as aforesaid, zinc (or zinc compound) on the wire, or
article, to be coated, and then applying silicate of soda, or liquid glass, or vitreous
matter, or equivalent matter; substantially as herein before described.
Dated this 17th day of July 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents for the Applicants.