Redesign of ultrasonic systems used at Sperry Rail Service's fleet of detector cars; ultrasonic channels in redesigned wheel search units are featured; induction system will reset itself at bolt hole without giving alarm, short distance after last echo is received from hole; however, if crack is present, signals from it will continue to register until preset alarm count is reached; if alarm system is set to detect cracks 1 in. or more long, two alarms would be received from 2 in. crack. (see also Ry Track and Structures v 62 n 5 May 1966 p 24-7)
Sperry improves its rail test cars
Ry Age
Railway Age ; 160 , n 18
1966
3 pages
Article (Journal)
English
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Sperry improves its rail test cars
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