Device for use in measuring the thickness of surface layers and coatings
OwnerOve Saberginventor
Life of this patent
Estimating the term…
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.
Claims4
A device for use in measuring the thickness of surface layers and coatings, comprising a drill having at least one cutting edge, each said cutting edge forming an angle of 45.degree. with the axis of the drill;
- means for retaining said drill and for rotating same relative to drill guide means;
- drill guide means comprising a guide plate having a bore extending therethrough dimensioned to guidingly and rotatably receive said drill during the operation thereof;
- and reticle means for measuring the width of circular bands formed in the layer or drilled by said drill.
Dependencies are inferred from the claim text.