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Interval recorder


Indust Equip News 11(7): 50
Interval recorder
A new recording mechanism employs a motor-driven 2-in. strip chart of electrically-sensitive paper to carry 8 traces: Six of these traces show the start and stop of recurring intervals of activity such as the speed of traveling objects, switch and relay operation, electrically or mechanically controlled processes or events that involve time intervals ranging from 1/60 sec. to 12 mins. The two outer traces are simultaneously a steady succession of impulses, and make a trace aligned oppositely along each edge of the paper. The dots that make up these 2 traces can be employed as the reference points, in connection with a straight edge, to establish the beginning and the end of the intermittent recurring traces made by the other 6 records. Source: Metron Instrument Co., 430 Lincoln St., Denver, Colo.

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Accession: 024888354



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