Improvements in Insulators for Carrying Electric Line Wires.
Year: 1899

page_text: Date of Application, 14th Mar., 1899-Accepted, 13th May, 1899
COMPLETE SPECIFICATION.
Improvements in Insulators for Carrying Electric Line Wires.
I, GUSTAV HELLSTRUNG, of 185, Furstenwall, Dusseldorf, in the Province of
the Rhine, Kingdom of Prussia, German Empire, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement ;—
My invention relates to improvements in insulators or insulating bodies, and
refers more particularly to such as are used for supporting the conducting wires
of telephone, telegraph and electric light circuits.
The insulator, according to my invention, consists of iwo sections, one of which
is more or less hollow, and adapted to be connected to the screw of the spike or
bolt by which the same may be attached to a wall or other surface, the upper or
outer portion of which said section is provided with a neck or nosing which may
have a male screw thread formed thereon, and in the said nosing is formed, trans-
versaily, a straight, irregular, zigzag or otherwise undulatory passage through
which the said line wire is passed, the latter being eventually gripped and held,
in position by the means of a, preferably, internally threaded cap forming the
said second section, and adapted to be secured upon the said nosing of the
first section.
Referring to the accompanying diawings Figs. 1 2 and 3 are central, vertical
sections through an insulator or insulating body, illustrating some of the many
ways in which the principle of my invention may be carried into effect. Fig. 4
being a section of the cap illustrating an alternative arrangement for its fixation.
In carrying my invention into effect I mould or otherwise construct of any
insulating material suitable for the purpose, an insulator in which the body
section is preferably formed internally as shewn, and adapted to engage with
the screw threaded end of the spike or bolt B for attaching it to where required,
the upper or outer end of A bring reduced in diameter to form a shoulder (',
and a neck or nosing 1. in the latter of which is formed, transversally, a passage,
through which is passed the line wire E, and adapted to engage with and, fit
upon the said neck or nosing 1) I provide a cap or closing-section 1, the inner
and outer lower edges of which are curved so as not to present a sharp surface
likely to rupture the wire E, the said cap being preferably provided with an
internal or female screw thread, adapted to engage with a like male thread
formed upon the neck or nosing D.
Referring to Fig. 1. In this example the passage for the wire E is preferably
straight, and provided with a dip at a point G, while the cap F has a central
spike or tongue H, which passes through an aperture made in the nosing D,
so that when the said cap is screwed upon D, the said spike or tongue H impinges
upon the line wire E and forces this down into the cavity G, thus securing the
said line-wire against possible movement in a longitudinal direction.
A slight modification is shewn in Fig. 2. in which the passage for the wire E
takes an undulatory or rise-and-fall course through the nosing D, the said wire
being retained against longitudinal displacement by reason of its being clamped
hetween the cap F, and the shoulder C, when is screwed home.

page_text: A further modification of the direction of the passage for the wire E through 1)
is shewn in Fig. 3, the said wire being retained in position by the screwing home
as in Fig. 2.
of
I may find it convenient to dispense with the screw threads upon D and F,
and form the surfaces of these perfectly plane, in which case I may provide in
the cap F, one or a pair of bayonet-sockets, such as J (Fig. 4,) with which may
be caused to engage one or both portions of the wire E, extending from the end
or ends of the passage in 1 through which it passes, so that a part turn imparted
to 1) would cause the said wire to be clamped by being forced up into the end or
ends of the said slot or slots.
It is obvious that the wire passage through the nosing 1) may be designed in
a variety of ways to attain the same ends, and I wish it understood that those
shown are given merely as examples and not by any means as exhaustive, and
I may arrange the said wire passage in any manner desired without departing from
the principle involved.
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:
(1) The insulator or insulating body for supporting electric line wires, and con-
sisting of two different parts or sections, one of which is connected with a screw
or bolt for attachment to where required, and provided with a transverse passage
for the said line wire, the second part or section being in the form of a cap,
adapted to be screwed or otherwise fixed upon the first section, whereby the said
line wire is clamped firmly by, and between the said sections, substantially as
herein described and shewn.
(2) The insulator or insulating device for carrying an electric line wire, con-
sisting of a body A, connected to a screw or bolt B, and having a neck or nosing D,
in which is formed a transverse pussage for the line wire E, provided with a
dip at a point G, the said portion 1) having an external thread, and provided with
an internally threaded cap F, adapted to screw upon the said neck or nosing the
said cap having an internal spike or tongue H, adapted to pass through a passage
in D and impinge upon the wire E and force it into the dip G, when the said
cap is screwed home, substantially as and for the purposes herein described and
shewn by Fig. 1 of the accompanying drawings.
(3) The insulator or insulating device for carrying an electric line wire, con-
sisting of the body A, with screw or bolt B, and having a shoulder C, and an
externally threaded neck or nosing 1), with straight, irregular, zigzag, or undulatory
transverse passage through the said portion D for carrying the line wire E, with
internally threaded cap F adapted to screw upon the portion D, and clamp the
wire E between itself and the shoulder C, substantially as herein set forth and
shewn by Figs. 3 and 4 of the appended drawings.
(4) The insulator or insulating body characterized by the preceding claims,
with the alternative of a plane surface upon the inner and outer faces of the
cap F and neck 1) respectively the former having formed therein one or a pair
of bayonet slots such as J K, for engaging the wire E, substantially as herein
described and shewn with special reference to Fig. 4.
1000
GEO. THOS. HYDE,
1, Broad Street, Buildings, Liverpool Street, London, E.C.,
Agent for the Applicant.
CUR HALT SHU
000 TO