Applications of measuring apparatus or devices for track-building purposes (apparatus on locomotives or cars to indicate or record bad track sections B61K9/00; measuring angles, linear dimensions, or irregularities in general G01B, G01C)

Child Classifications

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• E01B 35/02 for spacing, for cross levelling; for laying-out curves
• E01B 35/06 for measuring irregularities in longitudinal direction
• E01B 35/12 for measuring movement of the track or of the components thereof under rolling loads, e.g. depression of sleepers, increase of gauge