Improvements in Apparatus and Means for Vulcanizing Small Articles, more especially intended for Vulcanizing the Insulation at the Joints of Electric Conductors.
Year: 1894

page_text: Date of Application, 14th Apr., 1894
Complete Specification Left, 14th Feb., 1895-Accepted, 6th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in Apparatus and Means for Vulcanizing Small
Articles, more especially intended for Vulcanizing the Insulation
at the Joints of Electric Conductors.
I, HENRY EDMUNDS, of 39 Victoria Street, in the City of Westminster,
Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
When, electric conductors have been connected, or joined, together, the
insulation, with which the joint is covered, has, usually, to be vulcanized; and it is
the principal object of my invention to provide apparatus, and means, by which
the vulcanization can be readily, and efficiently, performed; but my invention may
also be applied to other cases where it is required to vulcanize small articles.
According to my invention I provide a divided block, or mould, which is fitted to
embrace, or be placed and secured around, the article, or part, to be vulcanized, and
which can be heated to a sufficient temperature to effect the vulcanization of the
vulcanizing composition employed. In order to prevent the too sudden application
of the heat of the said block, or mould, to the composition, the block, or mould,
may be made with recesses sufficiently larger than the articles, or parts, to which
it is to be applied, to receive a lining, or bushing, of brass, or other suitable
metal, or material, formed inside so as to enclose the article, or part, to be
vulcanized, and divided so that it can be placed, and secured, on the article, or
part, the aforesaid block, or mould, having in it a recess to receive the said lining,
or bushing. These linings, or bushings, can be made with various forms and sizes
of recesses to fit around articles, or parts, of various shapes and sizes; and they
can all be of the same size and shape, outside, so that they can all be used in the
same block, or mould. It is necessary to heat the block, or mould, to a temperature
such that, when it is applied to the article, or part, it will convey, to the
vulcanizable composition, the necessary heat to effect vulcanization, the heat, and
the time during which it is applied, being regulated in accordance with the
vulcanizable composition employed. The said block, or mould, may be heated in
any convenient way. In order that it may be heated to a known, and desired,
temperature, its heating may be effected by placing it in a molten bath of metal,
or alloy, which becomes molten at a known, and suitable, temperature. In order
that the application of heat may be regulated with exactitude, and be maintained
for a length of time in accordance with the particular vulcanizable composition
used, a metal, alloy, or material, may be used which will give out the necessary
heat for the necessary time required by the particular vulcanizable composition
employed. For this purpose the block, or mould, may be made as a casing to
contain an alloy, or material, which will in changing its condition, say from a
molten condition to that of a solid, transmit the necessary beat for vulcanizing the
compound. The alloy, or the like, can readily be selected so that it will take a
known temperature to render it molten, and a known time to give up its heat, and
become solid, so that, by this means, the degree of temperature, and the period of
application of such temperature, can readily be regulated in accordance with the
requirements in these respects to effect the vulcanization of the particular vulcaniz-
able compound employed. The devices described can be held in place, and be
compressed upon the vulcanizable composition, by any suitable means, such as

page_text: tongs, fitted to embrace the block, or mould, aforesaid. The arrangement
described constitutes a portable vulcanizing device which can be readily used in
situations where vulcanizing could not be effected, or but with difficulty effected,
according to other methods. Moreover the heat can be applied in a graduated
manner and injury to the insulation by the sudden application of heat, is thereby
prevented. If tongs be used to force the parts of the block, or niould, together
the handles of the tongs may be secured, so as to hold the tongs in position, by
means of a loop passed over them.
When the lining, or bushing, hereinbefore described is used it is placed cold
upon the article, or part, to be vulcanized, and the heated block, or mould, is
applied thereto. When the molten alloy, or the like, is used as the heating
medium, the lining or bushing, can be dispensed with, the interior of the block, or
mould itself, being shaped to fit closely around the article, or part, to be
vulcanized.
Dated this 14th day of April 1894.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
WMPLETE SPECIFICATION.
Improvements in Apparatus and Means for Vulcanizing Small
Articles, more especially intended for Vulcanizing the Insulation
at the Joints of Electric Conductors.
I, HENRY EDMUNDS, of 39 Victoria Street, in the City of Westminster,
Electrical Engineer, 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 :-
When electric conductors have been connected or joined together, the
insulation, with which the joint is covered, has, usually, to be vulcanized, and it is
the principal object of my invention, to provide apparatus, and means, by which
the vulcanization can be readily, and efficiently, performed, but my invention may
also be applied to other cases where it is required to vulcanize small articles.
According to my invention (which will explain with reference to the
accompanying drawings) Fig. 1 being a perspective view of the block A, and
Fig. 2 a longitudinal section and Fig. 3 a cross section of the lining B, I provide
a divided block or mould A, which is fitted to embrace, or be placed and
secured around, the article, or part, to be vulcanized, and which can be heated
to a sufficient temperature to effect the vulcanization of the vulcanizing com-
position employed. In order to prevent the too sudden application of the heat of
the said block, or mould, to the composition, the block, or mould, may be made
with recesses sufficiently larger than the articles, or parts, to which it is to be
applied, to receive a lining, or bushing B, of brass, or other suitable metal, or
material, formed inside so as to enclose the article, or part, to be vulcanized, and
divided so that it can be placed, and secured, on the article, or part, (for example
by the cramp C and screw D), the aforesaid block, or mould, A, having in it a
recess to receive the said lining, or bushing B. These linings, or bushings, can be
inade with various forms and sizes of recesses to fit around articles, or parts, of
various shapes and sizes, for instance, large or small cables, and straight, or
T, joints, and they can all be of the same size and shape, outside, so that they can
all be used in the same block, or mould. It is necessary to heat the block, or
mould, to a temperature such that, when it is applied to the article, or part, it will
convey, to the vulcanizable composi ion, the necessary heat to effect vulcanization,
the heat, and the time during which it is applied, being regulated in accordance

page_text: with the vulcanizable composition employed. The said block, or mould, A, may
be heated in any convenient way. In order that it may be heated to a known, and
desired, temperature, its heating may be effected by placing it in a molten bath of
metal, or alloy, which becomes molten at a known, and suitable, temperature. In
order that the application of heat may be regulated with exactitude, and be
maintained for a length of time in accordance with the particular vulcanizable
composition used, a metal, alloy, or material, may be used which will give out the
necessary heat for the necessary time required by the particular vulcanizable
composition employed. For this purpose the block, or mould, may be made as a
casing to contain an alloy, or material, which will in changing its condition, say
from a molten condition to that of a solid, transmit the necessary heat for
vulcanizing the compound. A suitable alloy for the purpose is composed of tin
2 parts and lead and cadmium each one part by weight. The alloy, or the like,
can readily be selected so that it will take a known temperature to render it
molten, and a known time to give up its heat, and become solid, so that, by this
means, the degree of temperature, and the period of application of such temperature,
can readily be regulated in accordance with the requirements in these respects to
effect the vulcanization of the particular vulcanizable compound employed. The
devices described can be held in place, and be compressed upon the vulcanizable
composition, by any suitable means, such as tongs fitted to embrace the block, or
mould aforesaid, or handles e applied to the divided block hinged at f. The
arrangement described constitutes a portable vulcanizing device which can be
readily used in situations where vulcanizing could not be effected, or but with
difficulty effected, according to other methods. Moreover the heat can be applied
in a graduated manner and injury to the insulation by the sudden application of
heat, is thereby prevented. If tongs be used to force the parts of the block, or
mould, together the handles of the tongs may be secured, so as to hold the tongs
in position, by means of a loop g passed over them.
When the lining, or bushing B, hereinbefore described is used it is placed cold
upon the article, or part, to be vulcanized, and the heated block, or mould A, is
applied thereto. When the molten alloy, or the like, is used as the heating
medium, the lining or bushing B, can be dispensed with, the interior of the block,
or mould itself, being shaped to fit closely around the article, or part, to be
vulcanized.
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 :-
For vulcanizing joints of electric conductors or other small articles a divided
block or mould which can be placed upon the article to be vulcanized with or
without the intervention of a lining or bushing the said block or mould being
heated to the requisite degree to properly effect the vulcanization during cooling
substantially as herein before described.
Dated this 14th day of February 1895
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.