Thread anvils for inside micrometer

Details Thread anvils for inside micrometer Thread anvils for inside micrometer

1984-08-03

1985-10-22

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33199R, G01B 318, G01B 512

Patent

active

045479704

ABSTRACT:
A thread gauge which attaches to an inside micrometer to measure the thread pitch diameter of internally threaded parts. A pair of anvils have external threads which match in pitch with the threads of the part. Each anvil has a bore which receives a ball and a slot which receives a stem projecting from the ball. Mounting sleeves connect the stems with the opposite ends of the micrometer. Each anvil can rotate on its ball about the stem axis so that the micrometer can be adjusted to position the anvils against the threaded part. The anvils can also move linearly on the balls to properly align with the threads of the part.

REFERENCES:
patent: 1797122 (1931-03-01), Bohn
patent: 2249611 (1941-07-01), Johnson
patent: 2410571 (1946-11-01), Easton et al.
patent: 2556580 (1951-06-01), Fox et al.
patent: 2937452 (1960-05-01), Man
patent: 3111766 (1963-11-01), Bryant
patent: 4453316 (1984-06-01), Marveggio
Rowell, "Using a Ball-Pointed Mike for Internal Thread Measurement", American Machinist, Jul. 1931, p. 179.

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