Improvements in Contact or Collector Bars for the Overhead Conductors of Electrical Railways and Tramways.
Year: 1895

page_text: Date of Application, 25th June, 1895
Complete Specification Left, 11th Mar., 1896-Accepted, 11th Apr., 1896
PROVISIONAL SPECIFICATION.
[Communicated from abroad by Messrs. SIEMENS & HALSKE, of Berlin, in the
German Empire, Electrical Engineers.]
Improvements in Contact or Collector Bars for the Overhead
Conductors of Electrical Railways and 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 the Specification to our Patent No. 4540 of 1894, we described a contact or
collector bar carried by the vehicles of electric railways and tramways for
collecting the current from overhead conductors which bar was constructed of
metal of a trough shape into which was fitted a solid bar of conducting metal
having on each side thereof porous material saturated with lubricant.
According to one of the present improvements, the bar is composed of two
troughs, preferably of aluminium, the one being narrower than the other so as to
fit within the same, leaving spaces on either side between the inner and outer
troughs, which spaces are filled in with a lubricant, while the inner trough is filled
with soft metal; or the inper trough may be filled with lubricant and the spaces
of the outer one with soft metal. The two troughs are secured together by
rivetting or otherwise.
According to another modification we employ only a single trough of aluminium
as in the former Patent, but instead of filling it with a metal bar and with porous
material, we fill it entirely either with a lubricant or with soft metal, the trough
itself forming the conductor.
Dated this 25th day of June 1895.
ABEL & IMRAY,
Agents for the Applicants.
Improvements in Contact or Collector Bars for the Overhead
Conductors of Electrical Railways and 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 the Specification to our Patent No. 4540 of 1894, we described a contact or
collector bar carried by the vehicles of electric railways and tramways for
collecting the current from overhead conductors which bar was constructed of
metal of a trough-shape into which was fitted a solid bar of conducting metal
having on each side thereof porous material saturated with lubricant.
According to one of the present improvements the bar is composed of two
troughs, preferably of aluminium, the one being narrower than the other so as te
Price 8d.1

page_text: fit within the same, leaving spaces on either side between the inner and outer
troughs, which spaces are filled in with a lubricant, while the inner trough is filled
with soft metal; or the inner trough may be filled with lubricant and the spaces
of the outer one with soft metal. The two troughs are secured together by
rivetting or otherwise.
According to another modification we employ only a single trough of aluminium
as in the former Patent, but instead of filling it with a metal bar and with porous
material, we fill it entirely either with a lubricant or with soft metal, the trough
itself forming the conductor.
Fig 1 of the accompanying drawing shews a side view and Fig. 2 an enlarged
cross section of a collector bar constructed as first above described.
ab are two troughs, preferably of aluminium, of which the smaller inner one b is
secured to the outer one a by means of rivets c.
The space of the inuer trough is filled with soft metal d, while the two spaces
of the outer trough are filled with a lubricante; or the reverse arrangement may
be used.
Figs. 3 and 4 shew respectively a side view and enlarged cross section of the
second described construction in which a single trough-shaped barf of aluminium,
is filled entirely with a lubricant g, or with soft metal, the trough itself being made
to form the conductor.
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 :-
1. A contact or collector bar for overhead conductors consisting of the combina-
tion of two troughs, of which the smaller one is fixed within the larger one so as to
leave a space on each side thereof, such spaces as also the space of the inner trough
being filled partly with soft metal and partly with a lubricant substantially as
described.
2. A contact collector bar for overhead conductors consisting of a single trough
of aluminium which is filled either with soft metal or with a lubricant, the bar
itself being made to serve as the conductor for the electric current, substantially as
described.
Dated this 11th day of March 1896.
ABEL & IMRAY,
Agents for the Applicants.