Bore gauge

Details Bore gauge Bore gauge

1979-11-08

1981-03-03

Little, Willis

Geometrical instruments

Area integrators

Electrical

33164C, 33174Q, G01B 346, G01B 508

Patent

active

042532418

ABSTRACT:
A bore gauge for measuring the internal diameter of tubes comprises at least two concentrically and rotatably arranged members connected by a helically wound spring member. The spring member is capable of contacting the inside surface of the tube and causing relative rotation of the members thereby indicating the internal diameter of the tube.

REFERENCES:
patent: 2135912 (1938-11-01), Rae
patent: 2214633 (1940-09-01), Dillon
patent: 2311477 (1943-02-01), Semerak
patent: 2361336 (1944-10-01), Volis
patent: 2456497 (1948-12-01), Forsmark
patent: 2661541 (1953-12-01), Dulligan
patent: 2770045 (1956-11-01), Oliva
patent: 2830375 (1958-04-01), Zwayer
patent: 3316649 (1967-05-01), O'Connor
patent: 3646685 (1972-03-01), Goodenough
patent: 3721012 (1973-03-01), Muller
patent: 3772794 (1973-11-01), Hopler, Jr.
patent: 3959887 (1976-06-01), Seidel

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