04986498 is referenced by 17 patents and cites 4 patents.

A device for determining the condition of railway switches or railway crossings by monitoring the end position of tongue rails (2), said device having a sensor (18) within the area of the theoretical frog point (17) of a frog (8), said sensor giving on occasion of a mechanical collision with the wheel flange or with the running surface of the wheel a signal indicating premature wear within the area of the frog.

Title
Device for determining the condition of railway switches or railway crossings
Application Number
7/356303
Publication Number
4986498
Application Date
May 24, 1989
Publication Date
January 22, 1991
Inventor
Erich Sattler
Weisskirchen
AT
Heribert Quantschnigg
Weisskirchen
AT
Wolfgang Nayer
Zeltweg
AT
Franz Rotter
Zeltweg
AT
Agent
Cushman Darby & Cushman
Assignee
Voest Alpine Maschinenbau Gesellschaft m b H
AT
IPC
B61L 23/04
E01B 7/20
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