Improvements in Switch Apparatus for Railways.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in Switch Apparatus for Railways.
I, FRIEDRICH ZIEGLER of 23 Friedrich Wilhelms Platz, Erfurt in the Empire
of Germany, Railway Secretary, 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:-
This invention relates to an improvement in the arrangement of the points, and
is in fact a one sided double switch which is characterised by the second set of
points branching off from the curved rail of the first (simple) switch between the
tongue device and the frog point of the same, in such a way that both curved rails
turn off to the same side of the main track. Such a switch possesses numerous
advantages; one essential advantage is that in consequence of duplicating the angle
of branching off of the second track, the space taken up by railway sidings is much
reduced, and therefore the utilisable length of track is much larger.
The invention is shown on the accompanying drawings.
Figure 1 shows the arrangement of a one sided double switch on the principle of
this invention.
Figures 2 to 5 are various arrangements of such a one sided double switch for
various kinds of tracks.
Figure 6 shows the two sided double points hitherto employed, in order to
enable the difference between the old and new arrangement to be more clearly
understood.
The invention will be fully understood from the following-
In the ordinary two sided double points shown in Figure 6, a simple right and
left switch B' branches off from the straight main line A³, and a second switch C¹
branches from the same on the opposite side in such a way that the tongue device c
of the second switch track C¹ lies between the tongue device 6' of the first switch
track B', and the frog point a¹ of the latter.
In the one sided double switch forming this invention however the tongue device c
of the second track C lies between the first tongue device & of the first side track B
and the frog point a, and the second track C branches out of the curved first side
track B and both side tracks B and C turn off from the main track A which passes
straight on, on one and the same side.
Figures 2 to 5 show various developments of tracks based on the above invention,
and the switching off of side tracks BCDEFG, etcetera, from the main track A, these
figures further show the most preferable arrangement of tracks on the basis of this
invention. Owing to the second side track C being branched off from the curve of
the first side track B, the angle of branching 1 of the second track C which this
latter forms with the main track, is twice as great as the angle of branching 2 of
the first track B to the main track A, and from this a very advantageous arrange-
ment of tracks is obtained, and therefore a considerable saving of space in carrying
out the object of the invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is-
A one sided double switch, in which the second switch of the second side track C
branches off from the curved trock B of the preceding switch between the tongue

page_text: device band the frog point a in such a way that both curved side tracks B and C
turn off on the same side of the main track A.
Dated this 6th day of February 1893.
WM. P. THOMPSON & Con
Of 6, Lord Street, Liverpool, Agents for the Applicant.