Device for measuring the angular orientation of horizontal bores

Details Device for measuring the angular orientation of horizontal bores Device for measuring the angular orientation of horizontal bores

1981-04-24

1982-12-07

Martin, Jr., William D.

Geometrical instruments

Miscellaneous

Light direction

33304, 33314, 33391, 33399, E21B 4702

Patent

active

043619614

ABSTRACT:
Two tubular elements are connected by a ball-and-socket joint and arrangements are provided for measuring angular displacement which occurs between the longitudinal center axes of the two elements.

REFERENCES:
patent: 1141396 (1915-06-01), Jubinville
patent: 1460279 (1923-06-01), Rosbach
patent: 2652628 (1953-09-01), Jensen et al.
patent: 2792637 (1957-05-01), Seigel et al.
patent: 2906179 (1959-09-01), Bower
patent: 3065633 (1962-11-01), Lubinski
patent: 3200505 (1965-08-01), Hedges
patent: 3571937 (1971-11-01), Sears
patent: 3789511 (1974-02-01), Groom et al.
patent: 4047306 (1977-09-01), Otte et al.

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