TY  - JOUR
PY  - 1955//
TI  - Indication of train speeds by rectified current
JO  - Railway gazette
SP  - 650
EP  - 650
VL  - 102
IS  - 
N2  - 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.<p /> 
LA  - 
SN  - 
UR  - http://dx.doi.org/
ID  - ref1
ER  -