Geometrical instruments – Gauge – Circular size
Patent
1995-03-08
1996-03-26
Will, Thomas B.
Geometrical instruments
Gauge
Circular size
33563, G01B 334
Patent
active
055010202
ABSTRACT:
A fastener and drill bit gauge is disclosed. The apparatus includes a gauge element having a first series of holes with different respective diameters formed therein and arranged in order of progressively increasing diameter. Each hole in the first series has a diameter that corresponds to the diameter of a hole formed by a respective drill bit. A second longitudinal series of holes with different respective diameters is formed through the gauge element and arranged substantially parallel to the first series in a like order of progressively increasing diameter. Each hole in the second series is transversely aligned with a corresponding hole in the first series and has a diameter that corresponds with the diameter of a respective fastening element. The respective fastening element is engageable with a drill bit hole having a diameter of the aligned hole in the first series. Drill bits and fastening elements are engaged with holes in the first and second series, respectively, to measure a selected size for one of a drill bit and a fastening element and determine a corresponding size for the other of the drill bit and the fastening element.
REFERENCES:
patent: 1246536 (1917-11-01), Bristol
patent: 1881651 (1932-10-01), Judge
patent: 2475450 (1949-07-01), Dvorak
patent: 2728145 (1955-12-01), Holladay
patent: 2896333 (1959-07-01), Kivela
patent: 3416650 (1968-12-01), Mortensen
patent: 3703234 (1972-11-01), Howard
Noonan William E.
Will Thomas B.
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