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Room	III:	Signalling	and	safety	equipment

















       In	 the	 early	 days	 of	 the	 railways,	 the	 traffic	 volume	 was	 low	 and	 the
       speed	was	slow.	Trains	were	driven	by	sight,	and	no	special	measures
       were	required	to	indicate	whether	a	stretch	of	track	was	free	and	could
       be	driven	along.	The	only	signals	were	the	red	flag	and	a	bell.	When	rail
       traffic	 increased,	 people	 needed	 the	 support	 of	 technology	 to	 ensure
       safety,	 the	 close	 succession	 of	 trains	 and
       punctuality.

       This	 required	 secured	 tracks.	 As	 well	 as	 the	 key
       board	and	the	central	lock,	the	cylinder	key	matrix
       was	also	used	for	this	purpose.

       The	central	exhibit	in	this	room	is	an	operational	command	signal	box
       and	an	interlocking	system	made	by	the	Südbahn	factory	SBW	500	of
       Siemens-Halske	 that	 dates	 from	 1890,	 with	 an	 advance	 and	 a	 main
       signal.

       This	enabled	the	operator	to	ensure	that	the	train	route	was	safe.


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