Improvements in Safety-fuses for. Electric Currents.
Year: 1890

page_text: ⚫ Date of Application, 26th. Apr., 1890
Complete Specification Left, 24th Jan., 1891-Accepted, 28th Feb., 1891
i
PROVISIONAL SPECIFICATION.
Improvements in Safety-fuses for. Electric Currents.
I, OTTO TITUS BLÁTHY, Engineer, of 75, Hauptstrasse, at Budapest, Hungary,
do hereby declare the nature of this invention to be as follows:-
When safety-fuses used with high-tension electric currents give way, an, electric
are is formed between the contact pieces, which renders illusory the action of the
apparatus as a safety fuse, as no interruption of the circuit is effected, but also
damages the fittings of the fuse and involves great risk of fire. Means have been
suggested for effecting mechanical separation of the two contact pieces of the fuse
when it gives way, but these expedients are not quite reliable and occupy a
comparatively large space, rendering their application often very difficult, as for
instance in underground mains.
My invention relates to a safety fuse which without any mechanical refinements,
guards with certainty against the formation of an arc, is compact, simple, easily
made,and generally applicable.
I pass the fuse wire or strip through holes of one or more discs or plates of
insulating material, these holes being just large enough for the passage of the fuse-
wire or strip
They may be supported on the fuse itself, or preferably on the base or other part
of the safety appliance. Even with currents of very high tension, after the fuse
gives way, no arc is formed through the comparatively narrow holes of the insulating
plates, and, when they are sufficiently wide, no arc is formed around their edges.
The insulating pieces may, with advantage, be partitions of a shell or case,
enclosing the fuse, dividing the space around the fuse into two or more chambers
having lateral airholes.
Dated this 26th don of a nil 1200
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Safety-fuses for Electric Currents.
I, OTTO TITUS BLÁTHY, Engineer, of 75, Hauptstrasse, at Budapest, Hungary,
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 safety-fuses used with high-tension electric currents give way, an electric
arc is formed between the contact pieces, which renders illusory the action of the
apparatus as a safety fuse, as no interruption of the circuit is effected, and also
damages the fittings of the fuse and involves great risk of fire. Means have been
suggested for effecting mechanical separation of the two contact pieces of the fuse
when it gives way, but these expedients are not quite reliable and occupy a
comparatively large space, rendering their application often very difficult, as for
instance in underground mains.
any
My invention relates to a safety fuse which, without mechanical refinements,
guards with certainty against the formation of an arc, is compact, simple, easily
made and generally applicable, as I shall describe referring to the accompanying
drawings, shewing several modifications of my invention. I pass the fuse-wire or
strip A through holes O of one or more discs or plates of insulating material; (two
such plates are shewn in Fig. 1, one plate S in Fig. 3.) the holes O being just
large enough for the passage of the fuse-wire or strip A. The discs S may be

page_text: supported on the fuse A. itself, or preferably on the base, as shewn in Fig. 3 (where
the plate S is in one piece with the base) or on some other part of the safety-
appliance. Even with currents of very high tension, after the fuse gives way, no
arc is formed through the comparatively narrow holes of the insulating plates, and,
when they are sufficiently wide, no arc is formed around their edges.
The insulating pieces S may with advantage be partitions of a shell or case H
(as shewn in Figs. 2 and 4) the space around the fuse being thus divided into two
or more chambers which may have lateral airholes L Fig. 2.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. An electric safety-fuse, in which the fuse-wire or strip passes through holes in
one or more plates of insulating material, substantially as and for the purpose
set forth.
2. An electric safety-fuse in which the fuse wire or strip passes through holes in
plates and is enclosed in a shell or case of insulating material, substantially as
set forth.
1 1
1001
ABEL & IMRAY,
Agents for the Applicant.