Internal thread gage

Details Internal thread gage Internal thread gage

1990-07-10

1991-06-04

Haroian, Harry N.

Geometrical instruments

Gauge

Screw thread

G01B 348

Patent

active

050202308

ABSTRACT:
An internal thread gage has two gage fingers mounted perpendicular to a frame axis. Each gage finger has a semi-cylindrical surface cut with helical threads. The gage fingers will move together and expand apart to allow an internally threaded fastener to be inserted over them for measurement. One of the gage fingers will move perpendicular to the frame axis to assure that the threads on the gage fingers properly mesh with the internal threads of the fastener. The gage fingers have threads for forming functional diameter measurement, as well as a cone and vee for making pitch diameter measurement.

REFERENCES:
patent: 734784 (1903-07-01), Wells
patent: 2509886 (1950-05-01), Sachtleber
patent: 2578261 (1951-12-01), Orr
patent: 2706859 (1955-04-01), Johnson
patent: 2799090 (1957-07-01), Grzywna et al.
patent: 2822624 (1958-02-01), Klink
patent: 2842861 (1958-07-01), Johnson
The Johnson Gage Company, Internal Thread Gaging System, Bloomfield, Conn., 06002, 10 pages.
The Mtg. System of Internal & External Gaging, Aug. 6, 1938, 5100 Grumann Drive, Carson City, Nev., 89706 (702)883-1000.
PD System (Pitch Diameter Thread Measurement), Gagemaker Measuring Systems, 14 pages, P.O. Box 46452, Houston, Tex., 77234, (713)472-7360.

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