Countersink depth gauge

Geometrical instruments – Distance measuring – Single contact with a work engaging support

Patent

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Details

33542, 33572, G01B 328

Patent

active

057584338

ABSTRACT:
A depth gauge used to measure a countersink of a hole drilled into a surface that is not orthogonal to the hole. The depth gauge includes a displacement indicator and an alignment device. The displacement indicator includes a main body and a displaceable member. The alignment device includes an extension member coupled to the displaceable member of the displacement indicator. The extension member is sized to extend along a radial axis of the displaceable member and has a diameter that is approximately the diameter of the hole to ensure alignment between a centerline of the hole and a centerline of the displaceable member. The alignment device also includes a swivel assembly having a fixed portion coupled to the main body of the displacement indicator and a base in rotational engagement with the fixed portion to ensure that the displaceable member is properly displaced with respect to the surface.

REFERENCES:
patent: 1966618 (1934-07-01), Egorenkov
patent: 2401566 (1946-06-01), Horton
patent: 2758382 (1956-08-01), Hurd
patent: 2975524 (1961-03-01), Field
patent: 3114978 (1963-12-01), Porter
patent: 3116560 (1964-01-01), Matthews
patent: 3195237 (1965-07-01), Aldeborgh
patent: 4219936 (1980-09-01), Bridges
patent: 4630377 (1986-12-01), Schneider et al.
patent: 4905378 (1990-03-01), Culver et al.

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