Description of speed recorder in which time interval during which vehicle traverses known distance between 2 "trips" is indicated by length of line on chart; recorder is portable and records continuously for 8 days, power being supplied by accumulator to synchronous motor which operates only when speed record is being made.
New speed recorder for vehicles
J Sci Instruments
Journal of Scientific Instruments ; 21 , n 7
1944
2 pages
Article (Journal)
Electronic Resource
English
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