Improvements in Fixing Electric Conducting Wires to the Insulators Supporting same.
Year: 1893

page_text: Date of Application, 13th Feb., 1893-Accepted, 15th Apr., 1893
COMPLETE SPECIFICATION.
Improvements in Fixing Electric Conducting Wires to the Insulators
Supporting same.
1, PAUL RUDOLF SCHOMBURG of 21 Alt-Moabit, Berlin, in the Empire of
Germany, Factory Owner, 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 relates to insulators (such as are now used on telegraph posts and
the like) for electrical conducting wires and consists in means for mounting and
fixing such wires to their insulators so that the stretched conductor can be fastened
to the insulator without binding wires and in such a simple and effectual manner
that same can be done even by unskilled labour.
In the accompanying drawing
-:
Fig. 1 is a front elevation of an insulator with the electric wire attached thereto
according to my present invention.
Fig. 2 is a side view of Fig. 1.
Fig. 3 is a detail view of the bolt which carries the fastening device and passes
through the head of the insulator-as hereinafter explained.
Figs. 4 and 5 are respectively a front and side elevation of a slightly modified
construction of the fastening device.
Figs. 6 and 7 illustrate (in corresponding views to Figs. 4 and 5) the same
arrangement applied to an insulator whose head is shaped to enable the line wire g
to be carried at an angle.
The insulator (which is otherwise constructed of the usual forms such as are
commonly used for telegraph posts) is formed directly under the head portion with
a transverse hole or passage serving for the reception of a pin cr bolt a provided at
its ends with round discs which are eccentric to the said bolt a and against
which the collars or shoulders c c¹ lie respectively and act as washers to the square
portions or heads d d'.
The suitably cut out ends of parts e e¹ forming the clip are mounted on said
eccentric discs 6 6 respectively said parts e el being connected at their upper ends
by a cross piece f.
The lower edge of the said cross piece f is shaped to correspond to the form of
the head of the insulator and is advantageously provided with a recess or groove to
securely hold the line wire g.
The fastening of the said line wire g to the insulator by means of the cross
piece f is effected by suitably rotating the bolt a with the eccentric discs 6 6₁ so as
to move the cross piece f together with the clip portions e e¹ in a vertical direction
as indicated in dotted lines in Fig. 2.
This rotation of the bolt a is effected by any suitable means for instance by a
suitable key or spanner to fit the square parts d and d¹.
On rotating in one direction the cross piece with the clips e e¹ is depressed and
the line g is gripped and secured thereby. But on rotating in the other direction
the cross piece is raised and the line g is released.
In the modification shown in Figs. 4 and 5 the clips e e¹ are in one piece and the
part f which acts as a pressing part is rivetted on to a projecting portion of
said clip.
The modification shown in Figs. 6 and 7 differs only by reason of the modified
form of the head of the insulator which is provided with a projection or raised
portion on one side of the slot that receives the line wire g. This particular
construction is employed to advantage especially in cases where the line after being
fastened to the insulator is to be carried at an angle with the insulator.

page_text: The hereinbefore described fastening device is made advantageously of a suitable
metal such as for example galvanized iron, etc.
For the cross piece for f¹ it is advisable to employ an alloy (such as for example
silicious bronze) which is not affected by the weather and the current passing along
the line g.
However the employment of particular metals etc. is not essential to the invention
and any suitable metal or materials may be employed in making the several parts.
The herein before described fastening device has over previous fastening devices
the very important advantage that a simple turn of the hand suffices to either
fasten the line wire or to unfasten it for any purpose.
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:-
:-
The hereinbefore described means for fastening and securing-without binding
wire electrical conducting wires to the insulators supporting them consisting of a
suitable pin or bolt which passes through the head of the insulator carrying
eccentrically arranged circular discs such as 661 thereon which operate in clip-like
parts or arms such as e el which latter carry a crosspiece such as so that by
rotating the said bolt and eccentrics thereon the crosspiece is thereby raised or
depressed for the purpose of releasing or fastening the electric wire to the insulator
substantially in the manner and for the purposes hereinbefore set forth.
Dated this 13th day of February 1893.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.