Improvements in Trolley Wire Hangers, for use in Overhead Lines of Electrical Railways or Tramways.
Year: 1897

page_text: Date of Application, 2nd Nov., 1897
Complete Specification Left, 11th Aug., 1893-Accepted, 1st Oct., 1898
Improvements in Trolley Wire Hangers, for use in Overhead Lines
of Electrical Railways or Tramways.
I, PHILIP DAWSON, of 39, Victoria Street, in the City of Westminster, Civil and
Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in the construction of trolley wire hangers
for overhead lines in electric railways or tramways and has for its object to provide
a hanger made in one piece for one, two, or more overhead line wires or conductors
which can be readily attached to span wires or bracket arms and in which the
wires or conductors are more easily inserted in or removed from their insulators
than hitherto..
I will describe my invention for use with two overhead line wires but it will be
understood that it is not limited thereto.
According to my invention I form the hanger of one casting comprising (for
example) two hollow cone-shaped side parts for receiving the insulated bolts con-
nected together by a central cross piece. The insulated bolts are preferably made
with cheese shaped heads their other ends being screw-threaded and of a diameter
less than the bolt proper so as to form a shoulder against which the ear holding the
trolley wire or conductor is firmly screwed. The bolts are inserted in the cones
which are recessed so as to allow their heads to go in flush with the upper edges of
the cones.
A cap or cover provided with lugs or projections is screwed over each
cone so as to enclose the bolt, the lugs on the cap being struck with a hammer against
the casting, which is also provided with lugs, after it has been properly screwed up
in position, so as to prevent re-coil.
For suspending the hanger from span wires I form lugs on each side of the
casting with holes or hooks through which the span wires are passed. When the
hanger is used with a bracket arm extending from a vertical standard provide pro-
jecting parts on the upper side of the cross piece of the casting between the cones
which are secured by a pin or bolt to depending lugs formed on a sleeve embracing
the bracket arm.
Dated this 2nd day of November 1897.
Improvements in Trolley Wire Hangers, for use in Overhead Lines
of Electrical Railways or Tramways.
I, PHILIP DAWSON, of 39, Victoria Street, in the City of Westminster, Civil and
Electrical Engineer, do hereby declare the nature of my invention and in what
. 011

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
My invention relates to improvements in the construction of trolley wire hangers
for overhead lines in electric railways, or tramways, and has for its object to provide
hangers made in one piece for an over-head line wire, or conductor, or for two or
more, over-head line wires or conductors, which hangers can be readily attached to
span-wires, or bracket arms, the wires or conductors being more easily placed in, or
removed from position than hitherto.
I will describe my invention by reference to the accompanying drawings in
which
Figure 1 shews partly in front elevation and partly in vertical section, one form
of my improved trolley-wire hanger for supporting two trolley-wires.
Figure 2 is an end elevation thereof and
Figure 3 is a front elevation of a slightly modified form of the hanger arranged
for supporting one trolley wire.
Like letters of reference indicate like parts in the several figures.
According to my invention I form each hanger of one casting comprising, as shewn
in the examples illustrated in the drawings, two hollow cones A (for receiving the
insulated bolts B) connected together by a central web or cross-piece A¹. The
insulated bolts B are preferably made with cheese-heads b their lower ends 6¹ being
(as shewn in Figure 1) screw-threaded and of a diameter less than that of the bolt
proper, so as to form a shoulder against which is screwed the ear C to which the
trolley wire, or conductor, D is sweated, or soldered, which may be done in the
ordinary manner. The bolts B are inserted in the cones A which are recessed to
receive the heads b, the outside of these recessed portions being screw-threaded to
receive a cap, or cover, E provided with lugs, or projections e and preferably lined
with an insulating disc e¹. When the caps, or covers, E are screwed into position
as shewn in the drawings, they serve to enclose the bolts B, and they may be
permanently retained in this position by the lugs e, being struck inwards so as to
cause them to be moved from the position shewn in dotted lines to that shewn in
full lines in Figure 2 to engage with the lugs a on the cones A. For suspending the
hanger from span-wires I form lugs A2 projecting outwards from the cones A and
provided with hooks or holes a¹ through which the span-wires are passed. When
the hanger is used with a bracket arm F extending from a vertical standard, or other
support, I provide lugs a² projecting upwards from the web, or cross piece, A¹ as
shewn in Figure 3 these lugs being secured by a pin, or bolt G to lugs h depending
from a split sleeve H, which can be clamped upon and insulated from the bracket
arm F in the ordinary manner.
The herein before described trolley wire hangers may be used for supporting any
desired number of trolley wires, for example, when used for supporting two such
wires, as shewn in Figure 1 one of the ears C is screwed on to each of the bolts B,
and when used for supporting only one trolley wire as shewn in Figure 3 the two
bolts B are screwed into, or otherwise connected to, a cross bar C¹, provided at its
centre with a single ear C. The last described arrangement is particularly applicable
for supporting trolley wires at curves of short radius as it is well adapted to resist the
strains to which the said wires are usually subjected at those parts. When the
bangers are required to support more than two trolley wires they may be provided
either with a number of cones A, and bolts B, corresponding to the number of the
wires to be supported, each wire being connected with one of the bolts B in the
manner shewn in Figure 1, or with cross bars C¹ connected as shewn in Figure 3 to
two bolts B and provided with a number of ears each for supporting one of the
wires.
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 :-
11

page_text: one or two or more trolley wires substantially as hereinbefore described with reference
to the accompanying drawings.
2. A trolley wire-hanger having two or more cones such as A and two, or more,
insulated bolts such as B substantially as herein before described with reference
to the accompanying drawings.
3. In a trolley-wire hanger the combination with a cone such as A and a cap, or
cover, such as E, of lugs, or projections such as a e substantially as, and for the
purpose, herein before described with reference to the accompanying drawings.
4. The combinations and arrangements of parts constituting the trolley-wire
O hangers substantially as herein before described and illustrated respectively in
Figures 1 and 2 and in Figure 3 of the accompanying drawings.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.