Gun barrel internal diameter indicator

Details Gun barrel internal diameter indicator Gun barrel internal diameter indicator

1981-01-29

1982-09-14

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

33178R, 33162, G01B 512

Patent

active

043488129

ABSTRACT:
A gun barrel internal diameter indicator for checking a barrel bore includes an elongated, narrow holder defining a passage within which an elongated, flat bar is disposed. The bar includes a forward, inwardly tapered portion having lateral edges. A pair of blades are pivoted to the holder and include cam followers riding on the lateral edges of the tapered portion of the bar. Axial shifting of the bar spreads the blades apart. Suitable indicia on the bar provide a direct indication of the barrel internal diameter.

REFERENCES:
patent: 890590 (1908-06-01), Anderson
patent: 2047607 (1936-07-01), Zimmerman
patent: 2642672 (1953-06-01), Lewis et al.
patent: 2663942 (1953-12-01), Rudolph
patent: 2679690 (1954-06-01), Chorlton
patent: 2829440 (1958-08-01), Pedrick
patent: 3352021 (1967-11-01), Leach et al.
patent: 3589017 (1971-06-01), Kyle
Abstract of Ser. No. 155,317 entitled Circular Size Gauge for Tubular Objects, Applicant Gerald A. Gustafson.

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