On every railway system some method has to be employed for checking clearance between rolling stock and any fixed structure; on Southern Railway, structure profile gage has been developed which can be set up on special trolley on track about 1 min, and it draws, on reduced scale, outline or profile of any structure that is above or to one side of track.
Pantograph for railway structure profiles
Engineering
Engineering ; 160 , n 4152
1945
Article (Journal)
English
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