Year: 1889

page_text: [Communicated from abroad by JOSEPH G. WARD, of Irvington, New Jersey,
United States of America, Jeweller.]
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, 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:—
The object of my invention is to provide a process by means of which complete
metallic dental plates ready for the setting of teeth may be produced by electro-
deposition-steps for doing this are essentially as follows.
Casting a form from the mouth of the patient electro-depositing a substantially rigid
plate thereon, of one or more metals, as desired stripping the plate from the form or
mold, and then trimming and adjusting it to shape, as will be hereinafter more fully
set forth.
The invention is carried into effect by taking a plaster cast or impression of the
mouth or jaw, and from it getting the positive in wax or other material, in the usual
nanner, and after the same has become thoroughly dry, the surface is metallized or
made conductive, by applying bronze powder, plumbago, or black-lead, or any other
of the ordinary conducting agencies.
The positive is then submerged in an electrolytic bath, composed of any of the
metallic salts, or such as are commonly employed in obtaining metallic electro-
deposits, and the metal or metals, of which it is desired to make the plate, are then
deposited thereon, through the agency of voltaic electricity, the mold being allowed to
remain in the bath until the deposit has attained the requisite thickness; then if it be
desired to have the plate of increased thickness around the ridge, where the teeth are
to be set, the cast, with the plate adhering to it, may be removed from the bath, and
all the outer surface of the plate, excepting the portion to be thickened, may be
covered with a coating of wax, or other nonconducting substance, and then re-
submerged in the bath, and left there until the requisite thickness of plate around

page_text: the ridgo is secured, when it is taken from the bath, and after the plate has been
trimmed into proper shape, it may, if desired, be covered on the outer side with a
layer or partial layer of vulcanized rubber, or other suitable material, in the
usual way.
If it is desired to produce a dental plate of two or more metals, the cast is removed
from the bath, after one layer of metal is formed, and submorgod in another bath, of
the metallic salt desired, and so on, until the required number and thicknesses of
metal has been deposited.
In this manner a dental plate can be formed on the outside of precious metal, and
on the inner side, of a baser metal, as may be desired.
When removed from the bath, the plate is trimmed, and may, if desired, be coated
on the outer side with vulcanized rubber, or other suitable material, as before
described.
The deposit of silver may first be covered with a deposit of gold, platinum, or
other metal, not affected by the ingredients in the rubber, said deposit being of
sufficient thickness to prevent the ingredients of said layers from chemically acting on
the silver, and thus rendering the said layers soft and ineffective as a support for the
teeth.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, as communicated to me by my
foreign correspondent I declare that what I claim as now is :—
1. The process of producing a metal dental plate, which consists in first casting a
form from the mouth of the patient, and then electro-depositing, a substantially rigid
plate thereon, substantially as set forth.
2. The process of making dental plates, which consists in making a cast of the jaw,
of plaster or other appropriate material, in the usual manner, and after metalizing the
surface thereof, and allowing it to dry, depositing thereon two or more strata of
different metals, one upon the other, by electro deposition, substantially as and for the
purposes set forth.
8. The process of making dental plates, which consists in making a cast of the jaw,
of plaster or other appropriate material, in the usual manner, then, after metalizing
the surface, submerging the same, after it is dry, in an electrolytic bath, until there
is deposited thereon a plate of the desired thickness of the metal, or metals, then
removing the cast from the bath, and covering all the parts, except the ridges upon
which the teeth are to be set, with a coating of wax or other non-conducting
material, the re-submerging the cast in the bath until the desired thickness of metal
on said ridge is obtained, substantially as and for the purposes set forth.
Daind this 5th day of February 1880
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agonts for the Applicant.