IMPROVEMENTS IN THE PRODUCTION OF ENAMELLED AND METALLISED GLASS AND FICTILE WARE IN IMITATION OF ENAMELLED METAL WORK Communi
Year: 1882

page_text: LETTERS PATENT to Alexander Melville Clark of the firm of A. M and
W. Clark of 53 Chancery Lane in the County of Middlesex Fellow of the
Institute of Patent Agents for an Invention of IMPROVEMENTS IN THE
PRODUCTION OF ENAMELLED AND METALLISED GLASS AND FICTILE WARE IN
IMITATION OF ENAMELLED METAL WORK Communicated to him from abroad
by Johann Feix of Albrechtsdorf in the Empire of Austria
PROVISIONAL SPECIFICATION left by the said Alexander Melville Clark
at the Office of the Commissioners of Patents on the 22nd December 1882.
ALEXANDER MELVILLE CLARK of the firm of A. M and W. Clark of 53 Chancery
Lane in the County of Middlesex, Fellow of the Institute of Patent Agents,
"IMPROVEMENTS IN THE PRODUCTION OF ENAMELLED AND METALLISED GLASS, AND
FICTILE WARE, IN IMITATION OF ENAMELLED METAL WORK [Communicated to
him from abroad by Johann Feix of Albrechtsdorf in the Empire of Austria]
"
This Invention consists in the manufacture of a new product in imitation of
enamelled metal and consisting in the combination of a body or support of glass,
porcelain, ceramic or other fictile ware, with a metallic layer or film applied by
electro-deposition and an enamelled decoration
I am aware that it has before been proposed to apply the process of electro-
deposition to the decoration of glass and porcelain but only for the production of
designs in gold or silver. It has never been applied to ordinary enamelled articles
of which the enamel is attacked by the galvanic baths, and the product of this
Invention has never heretofore been obtained.
In carrying out this Invention I proceed as follows. I take, for example, a vase
or other article of glass and cover it with a layer either of platinum, nitrate of
silver, graphite, or other analogous substance which is a conductor of electricity.
1 then apply enamels according to a design in any suitable style, and fire them
Pain A

page_text: as in ordinary. The enamels should be hard enough to resist the action of acids
and of the galvanic baths. (It is unnecessary to here state the composition of the
enamels as they will vary with the nature and the color of the decoration to be
produced, and the means whereby sufficiently hard enamels may be obtained is
within the common knowledge of enamellers). The article thus coated and
enamelled is then suspended in an acid or cyanide bath wherein those portions not
covered by the enamel, and upon which the platinum or other previously applied
conductive layer is left exposed, receive, by electro-deposition, a thick coat of
metallic copper, zinc or silver without loosening the enamel. This having been
done the desired aspect may now be imparted to the article by polishing, silvering,
nickeling or otherwise thus producing objects of all kinds or shapes in perfect
imitation of enamelled metal work whether ancient or modern

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alexander Melville Clark in the Great Seal Patent Office on
the 16th June 1883.
ALEXANDER MELVILLE CLARK of the Firm of A, M, and W, Clark of 53 Chancery
Lane in the County of Middlesex Fellow of the Institute of Patent Agents
"IMPROVEMENTS IN THE PRODUCTION OF ENAMELLED AND METALLISED GLASS AND
FICTILE WARE IN IMITATION OF ENAMELLED METAL WORK. A communication to
me from abroad by Johann Feix of Albrechtsdorf in the Empire of Austria.
This Invention consists in the manufacture of a new product in imitation of
enamelled metal, to be named "Emaline," and consisting in the combination with a
body or support made of glass, porcelain, ceramic or other fictile ware, of an
enamelled design and of an electro-deposited layer of metal.
I am aware that it has before been proposed to apply the process of electro-
deposition to the ornamentation of glass and porcelain, but only for the production
of designs in gold or silvor. It has never been applied to ordinary enamelled
articles of which the enamel would be attacked by the galvanic baths, and the new
product of this Invention which imitates perfectly enamelled metal, has never
heretofore been obtained.
In carrying out this Invention I proceed as follows:-I take, for example, a vase
or other article of glass and cover it with a layer either of platinum, nitrate of
silver, graphite, or other analogous substanco which is a conductor of electricity.
I then apply enamels according to a given design in any suitable style (Greek,
Persian, Turkish, &c) and fire them as in ordinary. The enamels should be hard
enough to resist the action of acids and of the galvanic baths, but it is unnecessary
to here state the composition of the enamels as they will vary with the nature and
the color of the decoration to be produced, and the means whereby sufficiently hard
enamels may be obtained is within the common knowledge of enamellers. Tho
article thus coated and enamelled is then suspended in an neid or cyanide bath, and
upon the passage of a current from a battery or dynamo electric machine, those
portions of the surface not covered by the enamel, and at which the platinum or
other previously applied conductive layer is left exposed, receive by electro-
deposition a metallic deposit either of copper or zinc or silver which gradually
forms a thick layer without loosening the enamel from the surface. This having
been done, the desired aspect may now be imparted to the article by polishing,
silvering, gilding, nickoling or otherwise, thus producing objects of all kinds or
shapes in perfect imitation of enamelled metal work whether ancient or modern.
Having described the nature of the said Invention and the manner of performing
the same, I declare that what I claim as the Invention to be protected by the
hereinbefore in part recited Letters Patent is.
The new product termed "Emaline" herein described and the method of
manufacturing the same, said product consisting in the combination with a body
or support of glass, porcelain, ceramic, or other fictile ware, of designs in hard
enamel and of an electro-deposited layer of metal applied as specified.
In Witness whereof I the said Alexander Molville Clark have hereunto set
my hand and seal this sixteenth day of June A.D. 1883.