IMPROVEMENTS IN THE MANUFACTURE OF GOLD AND SILVER THREAD AND OTHER OBJECTS OR ARTICLES FROM ANIMAL MEMBRANES
Year: 1882

page_text: LETTERS PATENT to Frank Wirth, of the firm of Wirth and Company,
Patent Solicitors at Frankfort on the Main, in the Empire of Germany, for an
invention of "IMPROVEMENTS IN THE MANUFACTURE OF GOLD AND SILVER
THREAD AND OTHER OBJECTS OR ARTICLES FROM ANIMAL MEMBRANES,"
A communication from Carl Otto Harz Doctor of Philosophy and Wilhelm
von Miller, Doctor of Philosophy, persons resident at Munich in the Empire of
Germany.
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office of
the Commissioners of Patents on the 15th May 1882.
FRANK WIRTH, of the firm of Wirth and Company Patent Solicitors, at
Frankfort on the Main in the Empire of Germany, "IMPROVEMENTS IN THE
MANUFACTURE OF GOLD AND SILVER THREAD AND OTHER OBJECTS OR ARTICLES
FROM ANIMAL MEMBRANES [A communication from Carl Otto Harz Doctor of
Philosophy and Wilhelm von Miller, Doctor of Philosophy, persons resident at
Munich in the Empire of Germany.]
دو
The process for the production of the antique gold threads by means of which
brocades were worked before the 15th Century, has, as is well known, been lost
for a considerable period.
This Invention comprises a process, by means of which gold threads of equal
beauty and durability, within certain limits, to those of the said brocades of
ancient times, can be produced.
The process is as follows:-The pleura, the peritoneum, the pericardium, the
intestine skins, the amnion and allantoid skins, the swimming bladders of fishes,
and urinary bladders, skins and other divers membranes of the vertebrates, when
fresh, or when in a dry state, after moistening with the usual or weak alkaline
water, with or without the use of adhesive matter such as gum, are covered with
gold leaf, or gold dust, or with other metallic leaf or dust or coated by means of
electricity.
The membranes thus covered with metal, are rolled or not, and cut into small
strips which on account of their toughness can either be immediately employed in
weaving processes, or else spun into threads with a core or inner thread.
These metallized membranes may be cut into leaves or other shapes or when not
cut may be used for other artistic or other industrial purposes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frank Wirth in the Great Seal Patent Office on the 15th November
1882.
FRANK WIRTH, of the firm of Wirth and Company, Patent Solicitors, at
Frankfort-on-the-Main, in the Empire of Germany, "IMPROVEMENTS IN THE
MANUFACTURE OF GOLD AND SILVER THREAD AND OTHER OBJECTS OR ARTICLES
FROM ANIMAL MEMBRANES," A communication from Carl Otto Harz, Doctor of
Philosophy and Wilhelm von Miller, Doctor of Philosophy, persons resident at
Munich, in the Empire of Germany,
The process for the production of the antique gold thread by means of which
brocades were worked before the fifteenth century, has been lost sight of for some
centuries much to the loss of those engaged in this artistic branch of manufacture,
who, since that time, have vainly endeavoured to reproduce the brocade of those
times, in equal beauty and durability, Remarks have been made, in works by
Dr. F. Bock and others, upon the extraordinary importance of the matter, and
also upon the revolution in the manufacture of brocades, and of gold embroidery
in general, which would follow the recovery of the process of producing the said
antique gold threads.
This invention comprises a process, by means of which gold threads of equal
beauty and durability, within certain limits, to those of the said brocades of ancient
times, can be produced.
The process is as follows, that is to say-The Pleura, the Peritoneum, the
pericardium, the intestine skins, the Amnion and allautöid skins, the swimming
bladders of fishes, and urinary bladders, skins, and other divers membranes of the
vertebrates, when fresh, or when in a dry state, after moistening with the usual
weak alkaline water, with or without the use of adhesive matter such as gum, are
covered with gold leaf or gold dust, or with other metallic leaf or dust. The
membranes can, if desired, be covered with a layer of some good conducting
substance, and be coated with any metal by means of electricity.
The membranes, thus covered with metal, are rolled or not, and cut into small
strips which, on account of their toughness, can either be immediately employed
in weaving processes, or else spun into threads with a core or inner thread.
These metallized membranes are cut into leaves or other shapes or they are used
without being cut for other artistic or industrial purposes.
Having thus fully described the said invention and the manner of performing the
same I wish it understood that I Clain
First. The process for the manufacture of threads and other articles to be used
for artistic or other purposes, which process consists in covering animal membranes
with gold, silver, or other metal, in leaf or powder, or by means of electricity, the
said membranes being then cut into threads, leaves, or other articles or used without
being cut, as above set forth.
Second. The leaves, strips, or threads above described, which consist of animal
membranes covered with metal.
Third. The manufacture of artistic or other objects or articles by means of the
products named in the first and second claiming clauses.
In witness whereof I the said Frank Wirth have hereunto set my hand and
seal this Eleventh day of November in the year of our Lord One thousand
eight hundred and eighty two
FRANK WIRTH (L.S.)