Centralizing countersink gauge
AssigneeLockheed Corporation
InventorsRaymond F. Culver, Sudershan K. Khurana
Life of this patent
Estimating the term…
Abstract
Disclosed is a measuring device for determining both absolute and comparative depths of the countersunk portions of countersunk holes drilled in a workpiece, the measuring device being capable of centering itself within a hole being measured so that repetitive measurements can be made early and accurately; further the measuring device is capable of measuring the depth of a countersunk hole through a template.
Claims14
A measuring device for determining the dimensions of a tapered hole countersink depth of countersunk holes, each of said holes having a straight sidewall portion and a tapered portion, which comprises:
- a hollow body;
- a stem gauge attached to one end of said body so that the stem of said gauge extends into the interior of said body;
- a probe, one end of which comprises a measuring surface and the other end of which comprises a plunger contacting surface, mounted in said body whereby said plunger contacting surface is in constant contact with a plunger which projects through the stem of said gauge into said body;
- foot means having a central aperture for retaining said probe within said hollow body and for positioning said measuring surface for contact with a hole being measured;
- compression means for applying a constant load to said probe whereby the measuring surface projects through said central aperture of said foot means a pre-determined distance;
- and centralizing means for positioning said measuring surface in the center of the countersink.
Dependencies are inferred from the claim text.