The Invention of the Track Circuit: The history of Dr. William Robinson's invention of the track circuit, the fundamental unit which made possible our present automatic block signaling and interlocking systemsAmerican Railway Association
History
The Invention of the Track Circuit: The history of Dr. William Robinson's invention of the track circuit, the fundamental unit which made possible our present automatic block signaling and interlocking systems
In Germany, the track circuit for steam lines is not looked on with
much favor, as owing to the extensive employment of the Siemen's
controlled manual and the peculiar station masters' system of control,
called "Station Block," always used in that country (with, it must be
admitted, a very high record for safety,) the Germans think they would
not gain much by any great use of track circuit or automatic signals.
The writer has just had this view confirmed by a friend returned from
visiting the important works of the German Railway Signal Company at
Bruchsal, Baden. Automatic signaling is used on certain important
sections of the Berlin Elevated and Underground Road, installed before
the war by the Westinghouse Company, of London, with a.c. double rail
track circuits and this will be extended eventually to cover the
remaining sections still worked by the Siemen's controlled manual. Dr.
Kemmann, a member of the General Railway Direction, Berlin, published
last year a very interesting book describing his work with accounts
also of the London Underground and New York Subway installations,
showing that foreign systems are studied in Germany. But for steam
roads the writer believes from what he has studied of German methods
and ideas on the subject that the manual system will remain in use and
that the track circuit will not be much adopted.
The same remarks apply generally to Austria, Holland and Scandinavia,
though in the latter case English ideas are more in evidence and it is
probable that the track circuit, already in use to some extent, will
be developed as time goes on. In Austria automatic signaling was
certainly tried on a small scale on the Southern Railway, but with
what results the writer cannot say. In Switzerland the extended use of
iron ties is against the track circuit. In Belgium the Hall system was
at one time in use between Ghent and Wondelgem, but as the course of
the line was changed, these signals were removed. The section was
about 3-1/4 miles long. Automatic signals do not exist there now but
the track circuit is used at certain stations, notably throughout the
all-electric power installation at and close to Brussles Nord. The
writer does not believe it likely that automatic signaling will be
used on the steam roads in Belgium, at all events for some time yet.
With regard to Italy, Spain and Portugal, the writer does not possess
details, but believes it likely that the track circuit is only in use,
if at all, at a few important stations. The new Metropolitan line in
Madrid is equipped with an intermittent contact system, probably
copied from the Paris Metropolitan.
Public-domain text, read in full here on John Shaqi.
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