Niklaus Riggenbach (1817 - 1899) got the patent for
cog railway in 1863. The most popular railways with the Riggenbach's cog were Vitznau -
Rigi (1872), Arth - Rigi (1875), but also the cog railway by the side of Panama canal. The
electric locomotives help the ships keep moving. The railway 29 km long has rising 500
promile. Also Slovakian railway Štrba - Štrbské pleso, when finished in 1872, was
equipped with Riggenbach's cog. When the railway was newly built in 1970, the Abt's cog
Roman Abt (born 1850) - the student of Riggenbach -
created in 1882 the new constructiom of cog. The advantages were: greater power possible,
the smoother movement of the locomotives and they were cheaper.
The construction of the cog points was very important. They were
essential on the railways with full cog traction. On the railways with mixed
adhesive/cog traction the traffic is much easier with cog points.
To get onto cog use to be done in low speed (cca 5km/hod). It must be done
carefully. Cca 1.2 m on the beginning of the cog springs in order to get smoother
On the Abt's cog only one cog rod can be used in the short section. So the rail
crossing the cog rod need not to be intersected.
The red-signed cog rod is used by
the right cog wheel of the locomotive. Near by the crossing rail the left cog wheel uses
the green signed cog rod. The rail does not intercept the cog wheels, because it is cca 11
Attempt to reconstruct the cog-wheel roll-on to
cog see on this hyperlink!
(Click on the picture left to obtain it in original size)
The simple system above can be used only with secondary rails or by the light traffic.
When the points is built on the rail with heavy traffic or on great rising, the points
like on the picture right is used. Many of the parts are moving in complicated way, that
neither the cog rod nor the rails are intersected. The photos were made within station
Queralbs in Pyrenees. (Val de Núria railway
(Click on the picture right to obtain it in original size)
The Abt's points were used also on the railway Tanvald - Kořenov. The points in the
station Horní Polubný can be seen on the picture from the book of Petr Kroča:
Železniční návěsti/1. Historie a vývoj návěstí, kapitola Návěstní
předpisy v minulosti/Československo 1955. (Railway signals).
As I know, there were 3 Abt's points in Dolní Polubný. One of them is on the picture
of Mr. R. Friml  from 1988. It seems to be of the simpler type.
Manipulation with the extraordinary fast train
Korenov-Praha 26th june 1988, T426.003 and T466.3010
The photos of the original points in Dolni Polubny sent me
Mr. J.Hovorka, the photos were shot by Mr. J.Hovorka junior.
The points hardly seen in the book Železniční návěsti,
and on the photo by R.Friml is pretty shown here.
Photo: J.Hovorka junior
And the last points direction Korenov...
Photo J.Hovorka junior
The Abt's points were until 1996 on site. Then they were
removed, despite of declarating them technical artefact.