The complete speed indicating equipment consists primarily of a heavy-duty single-phase alternator and a rectifier moving coil instrument. Interposed in the circuit is a wheel dia. adjustment box, by which correction can be made for changes in tire dia. when the wheels are returned, and facilitates the transfer of the equipment to other motive power units having different wheel diameters. The speed indicating equipment is shown to be unaffected by the vibration met in traction conditions or by extraneous electrical influences. A range of locomotive speed indicators of robust construction, designed to withstand the conditions normally encountered in railway traction service, with a minimum of maintenance, has been developed by Smiths Industrial Instruments Limited.

  • Corporate Authors:

    Temple Press Limited

    161-166 Fleet Street
    Longon EC4,   England 
  • Publication Date: 1955-6-10

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Filing Info

  • Accession Number: 00039641
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 4 1994 12:00AM