Device for use in measuring the thickness of surface layers and

Details Device for use in measuring the thickness of surface layers and Device for use in measuring the thickness of surface layers and

1979-04-24

1980-11-25

Swisher, S. Clement

Geometrical instruments

Area integrators

Electrical

73150R, G01B 502, G01B 1102

Patent

active

042350182

ABSTRACT:
A device for measuring the thickness of coatings comprises a rotatable drill, the cutting edge or edges of which are at a 45.degree. angle to the axis of the drill. The drill is manually operated by means of a finger disc and guided and steadied during its operation in a through-going bore in a guide plate resting with an anti-slide surface on the coated surface, the thickness of whose coating is to be determined. The conical cut made by the drill is observed in a microscope, and the width of the circular band is noted on an in-built micrometer scale. Owing to the cutting angle being 45.degree., the said width is equal to the thickness of the coating.

REFERENCES:
patent: 2936659 (1960-05-01), Berlin et al.
patent: 3320810 (1967-05-01), Stamulus
patent: 3340615 (1967-09-01), Tooke, Jr.

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