Improvements in Treating or Preparing Gutta-percha and Rubber for Various Purposes.
Year: 1892

page_text: Date of Application, 5th Oct., 1892
Complete Specification Left, 14th June, 1893-Accepted, 23rd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Treating or Preparing Gutta-percha and Rubber
for Various Purposes.
I, ROBERT HUTCHISON, of Springvale Mills, Cowlairs, in the County of
Lanark, North Britain, Oil Manufacturer, do hereby declare the nature of this
invention to be as follows, that is to say
:-
My said invention has for its object to render gutta-percha or rubber less liable
to oxidation and consequent disintegration, to improve its elasticity, to diminish its
liability to become sticky or tacky, and to increase its tenacity. My improved
treatment whilst not diminishing the insulating property of gutta-percha or rubber
increases its durability when applied for electrical purposes.
My invention consists in combining with gutta-percha or rubber lanoline a
substance which can be separated from the greases recovered from manufactured
wools. The lanoline which may be combined with gutta-percha or rubber in various
proportions according to the condition as regards softness or otherwise desiderated
in the compound, is thoroughly incorporated therewith with the aid of moderate
heat, in apparatus of the kind used for malaxating or kneading rubber compounds.
Dated this Fourth day of October 1892.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION
Improvements in Treating or Preparing Gutta-percha and Rubber
for Various Purposes.
I, ROBERT HUTCHISON, of Springvale Mills, Cowlairs, in the County of
Lanark, North Britain, Oil Manufacturer 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, that is to say :-
My said invention has for its objects, to render gutta-percha or rubber less liable
to oxidation and consequent disintegration, to improve its elasticity, to diminish its
liability to become sticky or tacky, and to increase its tenacity. My improved
treatment, whilst not diminishing the insulating property of gutta-percha or rubber
increases its durability when applied for electrical purposes.
My invention consists in combining with gutta-percha or rubber or a mixture
thereof, a substance which is more or less purified wool cholesterine and which I term
"lanichol" but which was referred to in my relative Provisional Specification as
"lanoline." I find that "lanolin" (or lanoline) has, prior to the date of my
present application for a Patent, been given to a variety of known products
containing wool cholesterine combined, with more or less fatty acid, water and
impurities; and to distinguish from such products the substance which I prefer to
use in carrying out my present invention the name lanichol is given to it, this term
consisting of an abbreviation of the well known chemical term cholesterine together
with a prefix indicative of the source of the cholesterine of which it mainly
consists.
The lanichol, which is a substance separable by known means from the greases
recovered as a bye product in the manufacture of wools, may be combined with
gutta-percha or rubber or a mixture thereof in various proportions according to
the conditions us regards softness or otherwise desiderated in the compound. The
combination is effected by thoroughly incorporating the ingredients with the aid of
D

page_text: moderate heat, say a temperature of about 212 degrees Fahrenheit, in apparatus
of the kind used for malaxating or kneading rubber or rubber compounds.
As an example, it may be stated that a very excellent electrical insulating com-
pound is formed by combining 50 parts, by weight, of gutta-percha, 30 parts rubber,
and 20 parts lanichol. I do not however restrict myself to any particular proportions
of the ingredients.
For some purposes compounds formed with lanichol (from which fatty acids or
glycerides of the wool greases have been separated) may be vulcanised like ordinary
rubber, and may have also combined with it any suitable one or more of such
ingredients, preferably of an inert nature, as are usually combined with ordinary
rubber.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In treating or preparing gutta-percha and rubber for various purposes, the
combining of wool cholesterine therewith substantially as hereinbefore described.
Dated this Thirteenth day of June 1893.
EDMUND HUNT,
Applicant's Agent.