Dimension measuring device

Details Dimension measuring device Dimension measuring device

1991-03-01

1991-12-10

Will, Thomas B.

Geometrical instruments

Distance measuring

Opposed contacts

33502, 33784, 324716, 338 99, G01B 702, G01B 712

Patent

active

050706225

ABSTRACT:
To measure the gaps between fuel rods in a fuel assembly, a feeler gauge is provided with a pair of resilient arms having elongated electrical resistance strips carried by their confronting surfaces and extending from terminations adjacent the free ends of the arms through a contact point of electrical inter-engagement. The strip terminations are wired into a metering circuit including a current source and an ammeter. When the arm free ends are positioned in a rod gap, the position of the contact point relative to the strip terminations determines the magnitude of resistance included in the metering circuit, and the meter registers the gap dimension.

REFERENCES:
patent: 1683059 (1928-09-01), Van Deventer
patent: 2435254 (1948-02-01), Ramberg
patent: 2508419 (1950-05-01), Ramberg
patent: 3239938 (1966-03-01), Kaercher
patent: 3350940 (1967-11-01), Stone
patent: 3729829 (1973-05-01), Lange et al.
patent: 3958337 (1976-05-01), Anichini
patent: 4052901 (1977-10-01), Bjork
patent: 4237612 (1980-12-01), Christian et al.
patent: 4279079 (1981-07-01), Gamberini et al.
patent: 4294015 (1981-10-01), Drouin et al.
patent: 4928342 (1990-05-01), Donaldson

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