Improved Means for Supporting Overhead Electrical Conductors Round Curves for Electric Railways or Tramways.
Year: 1891

page_text: Date of Application, 31st Oct., 1891
Complete Specification Left, 6th July, 1892-Accepted, 6th Aug., 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by Messrs. SIEMENS & HALSKE, of 94, Markgrafen-
strasse, Berlin, in the German Empire.]
Improved Means for Supporting Overhead Electrical Conductors
Round Curves for Electric Railways or Tramways.
We, SIEMENS BROTHERS & Co. LIMITED of 12 Queen Anne's Gate,.
Westminster in the County of Middlesex, Electrical Engineers, do hereby declare
the nature of this invention to be as follows :-
In electric railways or tramways that are supplied with the electric current from
an overhead conductor, the latter requires to be supported round the curves of the
line by a polygonal arrangement of lateral staying wires.
The longitudinal strains to which the conductor is subjected along the straight
lengths thereof, are partially converted at the curves into horizontal transverse
strains which are taken by the staying wires and which consequently tend to bring
the conductor and the stays into one and the same horizontal plane, so that a
sliding contact, in passing the points of attachment of the stays, would come in
contact with the latter.
According to the present invention this defect is obviated by providing on the
conductor at such curves, lengths of wire attached at each end to the latter, and
raised vertically away from the same between such attachments by means of
one or more vertical struts, which may be of insulating material, introduced between
the two, and the staying wires are then attached to one or more intermediate points
of the struts.
The staying wires are thus kept well above the conductor, so that the sliding
contact can pass along the underside of the latter without risk of coming in contact
with the former. The connection of the staying wire to the strut is such as
to allow the stay to assume any more or less inclined position relatively to the
vertical strut.
Dated this 31st day of October 1891
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improved Means for Supporting Overhead Electrical Conductors.
Round Curves for Electric Railways or Tramways.
We, SIEMENS BROTHERS & Co. LIMITED of 12 Queen Anne's Gate,
Westminster in the County of Middlesex, Electrical Engineers, 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:-
In electric railways or tramways that are supplied with the electric current from
an overhead conductor, the latter requires to be supported round the curves of the
line by a polygonal arrangement of lateral staying wires.
The longitudinal strains to which the conductor is subjected along the straight
lengths thereof are partially converted, at the curves, into horizontal transverse
strains which are taken by the staying wires and which consequently tend to bring
the conductor and the stay's into one and the same horizontal plane, so that a sliding
contact in passing the points of attachment of the stays would come in contact with
the stays or their fixings.

page_text: According to the present invention this defect is obviated as we shall describe
referring to the accompanying drawings. Fig. 1 is an elevation and Fig. 2 is a
plan shewing the overhead conductor stayed at a curve by stays affixed to it as
shewn in side view by Fig. 3 and in plan by Fig. 3^, also in modified form as
sbewn in side view and plan by Figs. 4 and 44. We provide on the conductor A
at such curves, lengths of wire S which are attached at each end to the conductor,
and are raised some distance above it between their points of attachment by means
of one or more vertical struts Z which may be of insulating material introduced
between the conductor and the upper wire. The staying wires Q are then attached
to an intermediate point of the strut, as shewn in Figs. 3 and 34, or to two points as
shewn in Figs. 4 and 44.
The staying wires Q are thus kept well above the conductor A so that the sliding
or rolling contact C can pass along the underside of the conductor without risk of
coming in contact with the stays or their attachments, whilst the staying wires may
assume a more or less inclined position.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :
In combination with overhead electrical conductors at curves, lengths of wire
supported above the conductor by struts to which the staying wires are attached,
substantially as and for the purpose set forth.
D 71° cit 1 T..l.. 190D
"
ABEL & IMRAY,
Agents for the Applicants.