Improvements in Insulating Compositions for Electrical Purposes.
Year: 1890

page_text: Date of Application, 17th July, 1890
Complete Specification Left, 16th Apr., 1891-Accepted, 16th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Insulating Compositions for Electrical Purposes.
1, ALFRED NAPIER FORD of 22 Gloucester Crescent, Regents Park in the
County of Middlesex, Gentleman, do hereby declare the nature of this invention
to be as follows :-
This invention has for its object to economise the use of gutta percha and such
like expensive materials in the manufacture of insulating compositions for electrical
purposes.
In carrying out the invention I effect the coating or saturating of certain fibrous
and, other substances with a drying oil-preferably linseed oil-which has been
previously partially oxidized by heating up to 350° Fah. more or less-for some
hours with litharge or other suitable oxidizing agent, and then drying such fibrous
substances so treated by air-heated or otherwise and when so dried recoating them
again and again, each time drying the one coat sufficiently to take another, until they
have increased in weight by means of such coating or saturation at least 50 per cent.
more or less, and after such matter so treated has become finally dry by the
oxidization of the oil I submit the same to the action of grinding or amalgamating
rolls preferably running at a high speed until a smooth and homogenous mass is
obtained, and having attained this consistency I add a suitable proportion say
25% of gutta percha or india rubber or compositions of the same and then
I subject to the action of crushing or amalgamating rolls or analogous means of
mixing until it is capable of being formed into a block or rolled out into thin
sheets.
The fibrous substances employ may be wood fibre when it is ready for use,
hemp, flax, jute, cotton, silk or other suitable fibre, as also worsted, or woollen or
other suitable animal fibre.
This material is designed to economise as stated the use of gutta percha or india
rubber or both of them in use for electrical purposes.
34
1..1.. 1000
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Insulating Compositions for Electrical Purposes.
I, ALFRED NAPIER FORD late of 22 Gloucester Crescent, but now of 22 Regents
Park Terrace, Regents Park in the County of Middlesex, Gentleman, 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 :-
This invention has for its object to economise the use of gutta percha and such
like expensive materials in the manufacture of insulating compositions for electrical
purposes.
In carrying out the invention 1 effect the coating or saturating of certain fibrous
and other substances with a drying oil-preferably linseed oil-which has been
previously partially oxidized by heating up to 350° Fahr.-more or less-for some
hours with litharge or other suitable oxidizing agent, and then drying such fibrous
substances so treated by air-heated or otherwise--and when so dried recoating
them again and again, each time drying the one previous coat sufficiently to take
another, until they have increased in weight by means of such coating or saturation

page_text: at least 50 to 200 per cent., more or less, and after such matter so treated has
become finally dry by the oxidization of the oil I submit the same to the action
of grinding or amalgamating rolls, preferably running at a high speed, until a
smooth and homogeneous mass is obtained, and having attained this consistency I
add a suitable proportion, say 25 per cent. of gutta percha, or india rubber, or
compositions of the same and then I subject to the action of crushing, or amalga-
mating rolls, or analogous means of mixing, until it is capable of being formed into
a block, or rolled out into thin sheets.
The fibrous substances I employ may be wood fibre when it is ready for use by
treatment such as described hemp, flax, jute, cotton, silk or other suitable fibre,
sponge, as also worsted, or woollen, or other suitable animal fibre. This material
is designed to economise as stated the use of gutta percha or india rubber or both
of them in use for electrical purposes.
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
The manufacture of insulating compositions for electrical purposes by the admix-
ture of gutta percha or india rubber or compounds thereof with the material
resulting from the aforesaid treatment of fibrous matters as hereinbefore described.
Dated the 16th day of April 1891.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.

page_text: Date of Application, 17th July, 1890
Complete Specification Left, 16th Apr., 1801-Accepted, 16th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Insulating Compositions for Electrical Purposes.
I, ALFRED NAPIER FORD of 22 Gloucester Crescent, Regents Park in the
County of Middlesex, Gentleman, do hereby declare the nature of this invention
to be as follows:-
This invention has for its object to economise the use of gutta percha and such
like expensive materials in the manufacture of insulating compositions for electrical
purposes.
In carrying out the invention I effect the coating or saturating of certain fibrous.
and other substances with a drying oil-preferably linseed oil-which has been
previously partially oxidized by heating up to 350° Fah. more or less-for some
hours with litharge or other suitable oxidizing agent, and then drying such fibrous
substances so treated by air-heated or otherwise and when so dried recoating them
again and again, each time drying the one coat sufficiently to take another, until they
have increased in weight by means of such coating or saturation at least 50 per cent.
more or less, and after such matter so treated has become finally dry by the
oxidization of the oil I submit the same to the action of grinding or amalgamating
rolls preferably running at a high speed until a smooth and homogenous mass is
obtained, and having attained this consistency I add a suitable proportion say
25% of gutta percha or india rubber or compositions of the same and then
I subject to the action of crushing or amalgamating rolls or analogous means of
mixing until it is capable of being formed into a block or rolled out into thin
sheets.
The fibrous substances I employ may be wood fibre when it is ready for use,
hemp, flax, jute, cotton, silk or other suitable fibre, as also worsted, or woollen or
other suitable animal fibre.
This material is designed to economise as stated the use of gutta percha or india
rubber or both of thein in use for electrical purposes.
:
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Insulating Compositions for Electrical Purposes.
I, ALFRED NAPIER FORD late of 22 Gloucester Crescent, but now of 22 Regents
Park Terrace, Regents Park in the County of Middlesex, Gentleman, 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 :-
This invention has for its object to economise the use of gutta percha and such
like expensive materials in the manufacture of insulating compositions for electrical
purposes.
In carrying out the invention I effect the coating or saturating of certain fibrous
and other substances with a drying oil-preferably linseed oil-which has been
previously partially oxidized by heating up to 350° Fahr.-more or less-for some
hours with litharge or other suitable oxidizing agent, and then drying such fibrous
substances so treated by air-beated or otherwise-and when so dried recoating
them again and again, each time drying the one previous coat sufficiently to take
another, until they have increased in weight by means of such coating or saturation

page_text: at least 50 to 200 per cent., more or less, and after such matter so treated has
become finally dry by the oxidization of the oil I submit the same to the action
of grinding or amalgamating rolls, preferably running at a high speed, until a
smooth and homogeneous mass is obtained, and having attained this consistency I
add a suitable proportion, say 25 per cent. of gutta percha, or india rubber, or
compositions of the same and then I subject to the action of crushing, or amalga-
mating rolls, or analogous means of mixing, until it is capable of being formed into
a block, or rolled out into thin sheets.
The fibrous substances I employ may be wood fibre when it is ready for use by
treatment such as described hemp, flax, jute, cotton, silk or other suitable fibre,
sponge, as also worsted, or woollen, or other suitable animal fibre. This material
is designed to economise as stated the use of gutta percha or india rubber or both
of them in use for electrical purposes.
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 :-
The manufacture of insulating compositions for electrical purposes by the admix-
ture of gutta percha or india rubber or compounds thereof with the material
resulting from the aforesaid treatment of fibrous matters as herein before' described.
Dated the 16th day of April 1891
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.