IMPROVEMENTS IN THE TREATMENT OF ARTICLES COMPOSED OF GUTTA-PERCHA FOR SURGICAL DENTAL AND OTHER LIKE PURPOSES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I EDWIN DODD of 2 Gothic Villa West Green, Tottenham in the County of
Middlesex Surgical Instrument Maker, do hereby declare the nature of my said
invention for "IMPROVEMENTS IN THE TREATMENT OF ARTICLES COMPOSED OF
GUTTA-PERCHA FOR SURGICAL DENTAL AND OTHER LIKE PURPOSES," to be as
follows:-
My Invention relates to the treatment of gutta-percha to adapt it for use for
surgical instruments such for example as pessaries, catheters bougies and the like
where the qualities of non-liability to fracture, flexibility, resistance to beat and
lightness are essentially necessary; but it is also applicable to dental and other
purposes where similar qualities are required.
In carrying out my Invention, having first made the articles of gutta-percha of
the quality ordinarily used for dental purposes I next apply to the said articles
French chalk in a fine state of division and then dip or steep the articles so treated
in a mixture composed of Bi-sulphide of carbon and Chloride of sulphur in the
proportion of say about 7 lbs, of the former to about 10 ounces of the latter, although
these proportions may be somewhat varied in practise. I then remove the articles
from the bath and again apply or rub French chalk into their surface by the aid of
a piece of wash leather or in any other convenient manner, when the articles under
treatment will be found to be tempered and to have acquired a smooth glossy
surface.

page_text: I EDWIN DODD of 2 Gothic Villas, West Green Tottenham in the County
of Middlesex Surgical Instrument Maker do hereby declare the nature of my
invention for IMPROVEMENTS IN THE TREATMENT OF ARTICLES COMPOSED OF
GUTTA PERCHA FOR SURGICAL DENTAL AND OTHER LIKE PURPOSES and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
My Invention relates to the treatment of Gutta Percha to adapt it for use for
Surgical Instruments, such for example as Pessaries, Catheters, bougies and the like
where the qualities of non-liability to fracture, flexibility, resistance to heat and
lightness are essentially necessary, but it is also applicable to Dental and other
purposes, where similar qualities are required.
In carrying out my Invention having first made the articles of Gutta Percha of
the quality ordinarily used for dental purposes, I next apply to the said articles
French Chalk in a fine state of division and then dip or steep the articles so treated
in a mixture composed of Bi-sulphide of Carbon and Chloride of Sulphur in the
proportion of say about seven pounds of the former to about ten ounces of the
latter, although these proportions may be somewhat varied in practice. I then
remove the articles from the bath and again apply or rub French chalk into their
surface by the aid of a piece of wash leather or in any other convenient manner
when the articles under treatment will be found to be tempered. I then pass the
articles through Sulphuric Acid and immediately plunge them into a bath of cold
water to remove all traces of the acid from the said articles. The articles will then
have acquired a smooth glossy surface.
CLAIMS.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1. Gutta Percha Articles treated with a material, known as French Chalk.
2. Gutta Percha Articles dipped or steeped in a mixture of Bi-Sulphide of
Carbon and Chloride of Sulphur.
3. Gutta Percha Articles further treated with French Chalk.
4. Gutta Percha Articles treated with Sulphuric Acid.
Dated this twenty eighth day of April One thousand eight hundred and
eighty five,
Witness,
THOMAS BROOKES,
EDWIN DODD.
Clerk to E. Dodd.