Measuring and testing – Vibration – By mechanical waves
Patent
1993-09-03
1996-04-09
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73597, 33719, 33757, 33DIG2, 324206, G01N 2904
Patent
active
055050867
ABSTRACT:
A method of measuring a length of a conduit comprises the steps of: supplying air into a conduit to insert a filamentary body into the conduit by flow of the air; detecting arrival of a forward end of the filamentary body at an outlet of the conduit; and measuring the length of the conduit from the length of the filamentary body inserted into the conduit. An apparatus for measuring a length of a conduit, comprises an air supply device for supplying air into the conduit; a filamentary body including a wire and a plurality of elastic large-diameter members attached to the wire; and a device for detecting that a forward end of the filamentary body arrives at an outlet end of the conduit, where the length of the conduit is measured from the length of the filamentary body inserted into the conduit.
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Sano Hiroaki
Taguchi Kinji
Tanaka Shigeru
Tsujimura Takeshi
Yabuta Tetsuro
Kwok Helen C.
Nippon Telegraph & Telephone Corp.
Sumitomo Electric Industries Ltd.
Williams Hezron E.
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