A Compound Preparation to be used as a Substitute for Gutta Percha and similar Products for Insulating and Waterproofing Purposes.
Year: 1891

page_text: Date of Application, 25th June, 1891
Complete Specification Left, 21st Apr., 1892-Accepted, 25th June, 1592
PROVISIONAL SPECIFICATION.
A Compound Preparation to be used as a Substitute for Gutta
Percha and similar Products for Insulating and Waterproofing
Purposes.
CHARLES NAPIER JACKSON of 64 Hanley Road Hornsey Rise Middlesex
Merchant do hereby declare the nature of this invention to be as follows:-
My invention consists in combining at suitable temperatures ordinary hard
paraffin wax having a melting point of from 100° to 180° Fahrenheit india rubber.
and bitumen, all hydrocarbons which when so combined constitute a substance
very tenacious, perfectly waterproof and a perfect insulating material. It is not
susceptible to atmospheric oxidation in the same way as gutta percha and india
rubber but is vulcanizable and much resembles gutta percha in its physical
characters and chemical properties. The following represents the method of
preparation:- take ten parts of paraffin wax and one part of bitumen and com-
bine them by digesting together in vulcanizer or similar convenient apparatus
at a temperature of 300 to 400 degrees Fahrenheit until the two substances are
intimately combined, the temperature is then allowed to fall to from 200 to 212
degrees Fahrenheit and having introduced into the mixture two parts of india
rubber this temperature is maintained till the whole forms an homogeneous uniform
combination. do not confine myself to exactly the above proportions or
temperatures as it is necessary to vary both in order to obtain products of varying
degrees of solidity for different purposes. I hereby declare the object of my
Patent to be the preparation of a compound substance to be used for insulating
and waterproofing purposes as a substitute for gutta percha and like substances.
Dated this Twenty-fifth day of June 1891.
CHAS. N. JACKSON,
Applicant.
COMPLETE SPECIFICATION.
A Compound Preparation to be used as a Substitute for Gutta
Percha and similar Products for Insulating and Waterproofing
Purposes.
CHARLES NAPIER JACKSON of 64 Hanley Road, Hornsey Rise London
Merchant 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:-
My invention consists in combining at suitable temperatures ordinary hard
paraffin wax having a melting point of from one hundred to one hundred and
eighty degrees Fahrenheit india rubber and bitumen or asphaltum all hydro-
carbons which when suitably combined constitute a substance very tenacious,
perfectly waterproof and a perfect insulating material. It is not susceptible to
atmospheric oxidation in the same way as gutta percha and india rubber but is
vulcanizable and much resembles gutta percha in its physical characters and
chemical properties.
The following represents the method I employ for the preparation of the afore-
said compound preparation viz. :-I take three parts of bitumen and combine with
one part of hard paraffin at a temperature of from three to four hundred degrees
Fahrenheit by placing in a vulcanizer or other convenient apparatus and keeping
them at the before named temperature for half an hour or until complete anal-
gamation of the two compounds has taken place. I then place four parts of the

page_text: resulting combination with one part of india rubber in a masticator or similarly
convenient apparatus and heat to a temperature not exceeding 220 degrees
Fahrenheit til sufficiently soft to manipulate, the mass is then kept at this
temperature and worked together by mastication or similar mechanical means till
the whole is thoroughly combined and uniform, it is then converted into rolls or
sheets whichever may be the most convenient for subsequent use.
I do not confine myself to the above proportions or temperatures as it is
necessary to vary both in order to obtain products of varying degrees of solidity
for different purposes.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be manipulated and prepared I
declare that what I claim is :-
The invention of an improved compound preparation composed of bitumen or
asphaltum, hard paraffin wax and india rubber hereinbefore set forth and described
to be used as a substitute for gutta percha, india rubber and the like substances
for insulating and water-proofing purposes.
Dated this 21st day of April 1892.
CHARLES NAPIER JACKSON.