IMPROVEMENTS IN COMPOUNDS FOR DENTAL PLATES AND OTHER PURPOSES, BUCH AS JEWELLERY, ARTIFICIAL CORAL BUTTONS, ALSO BILLIARD BALLS, AND OTHER SIMILAR ARTICLES
Year: 1875

page_text: LETTERS PATENT to Linus Orton Thayer, of Montreal, Canada, and
of 1, Leadenhall Street, E.C., City of London, Doctor of Medicine,
for the Invention of "IMPROVEMENTS IN COMPOUNDS FOR DENTAL PLATES
AND OTHER PURPOSES, BUCH AS JEWELLERY, ARTIFICIAL CORAL BUTTONS, ALSO
BILLIARD BALLS, AND OTHER SIMILAR ARTICLES."-A communication from
abroad by Volney Smith, of Schenectady, New York, United States
of America.
COMPLETE SPECIFICATION filed by the said Linus Orton Thayer at
the Office of the Commissioners of Patents, with his Petition
and Declaration, on the 13th July 1875, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, LINus
ORTON THAYER, of Montreal, Canada, and of 1, Leadenhall Street, E.O.,
City of London, Doctor of Medicine, send greeting.
WHEREAS I am in possession of an Invention for “INFROVEMENTS
IN COMPOUNDS FOR DENTAL PLATES AND OTHER PURPOSES, SUCH AS JEWELLERY,

page_text: "
ARTIFICIAL CORAL BUTTONS, ALSO BILLIARD BALLS, AND OTHER SIMILAR ÅRTICLES,”
and have petitioned Her Majesty to grant unto me, my executors, ad-
ministrators, and assigns, Her Royal Letters Patent for the same, and
have made solemn Declaration that the same has been communicated
to me from abroad by Volney Smith, of Schenectady, New York, United
States of America.
NOW KNOW YE, that I, the said Linus Orton Thayer, of Montreal,
Canada, Doctor of Medicine, do hereby declare that the following
Complete Specification, under my hand and seal, fully describes and
ascertains the nature of the said Invention, and in what manner the
same is to be performed, in and by the following statement:-
This Invention consists in a compound made of gun cotton, prepared
gum shellac, gum camphor, and a compound for the body and coloring
matter, together with sulphuric ether and alcohol. The compound for
the body is made of oxide of zinc, Chinese vermillion, and oxide of tin
and gold. In preparing this body I take the above-named ingredients
in about the following proportion :-Eight parts oxide of zinc, one part
Chinese vermillion, one-fourth part oxide of tin and gold, the coloring
matter to be varied according to shade required. After these ingredients
have been thoroughly incorporated with each other I mix the compound
thus obtained with the remaining ingredients in about the following
proportion: Compound of the body, one part; shellac, one part;
camphor, two parts; alcohol, ten parts; ether, twenty parts; gun cotton,
seven parts for solvent. In mixing these ingredients together the ether,
alchol, camphor, and shellac form solvents for the gun cotton; and
⚫ after the ingredients have all been mixed together (which operation may
be facilitated by placing them in a machine which I have constructed
for this purpose), the mass is ready to be formed into plates or forms
of the required shape. For this purpose I cut up the mass into pieces
of the proper size, and and expose to the atmosphere for six or eight
days, then place them into a mould, and submit to a heat of from 212° to
820° Fahrenheit, while being submerged in water or a vegetable oil.
By using shellac the article takes a higher finish, and is prevented
from shrinkage or warpage, which is a great desideratum, for if the
plate shrinks it does not retain its position in the mouth. The shellac
dissolves readily in alcohol at the ordinary temperature, and the in-
gredients are all mixed cold. By submitting the plates to the action
•
.

page_text: of heated vegetable oil or water the volatile parts are driven off, and
the plate becomes tempered and properly hardened for the dentist's
use.
When the plate comes into the dentist's hands it is placed on a form
of plaster of Paris prepared for the occasion, the teeth-are properly
arranged thereon, and the form is again submitted to heat in vegetable
oil or water at a temperature of 212° to 320°, when the plate is ready
for use. By these means a plate is obtained which is free from odor or
taste, not liable to shrinkage, void of all ingredients which would
produce irritation or local or constitutional injury, strong and durable,
light, and equal in appearance to the natural gum.
I do not claim] mixing finely comminuted gum camphor with
pyroxiline pulp; neither do I claim mixing gums and resins with
collodin, or with a semi-fluid liquid produced by dissolving vegitable.
fibre in nitric or sulphuric acids, as, such are not new.
What I claim as new, and desire to secure by Letters Patent is,
A plate for dental and other purposes made of the ingredients
specified, and prepared substantially in the manner herein shewn and
described. .
:
:
I also claim the use of this compound in the arts, videlicit, for the
manufacture of jewellery, artificial coral buttons of every form and color,
also billiard balls, brush and knife handles, spectacle frames, hand glass
frames, and all other articles that may be moulded into any desired form.
LINUS ORTON THAYER, M.D.
(L.S.)