Calculator is adapted stopwatch calibrated for fast accurate measurement of speeds. Single assembled unit is rugged, self-contained, and relatively inexpensive to manufacture. Potential market includes automobile-speed enforcement, railroads, and field-test facilities.
Small portable speed calculator
1973-10-01
Miscellaneous
No indication
English
NTRS | 1976
|New train performance calculator -- Speed time-time, distance-time calculator
Engineering Index Backfile | 1953
|Engineering Index Backfile | 1938
|Engineering Index Backfile | 1938
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