Sperry detector car, automotive unit designed to detect internal defects in rails; large \ill\w-voltage current generated in car which moves over track at 7 mi per hr; brushes of detecting unit making contact with rails thereby energizing section between brushes; defects cause variation in magnetic field set up in rail, which is amplified and recorded on sensitive instruments in car.
Les voitures detectrices Sperry
Les voitures detectrices Sperry
International Railway Assembly Meeting ; 1932
1932
4 pages
Conference paper
French
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