Angle tangent micrometer

Details Angle tangent micrometer Angle tangent micrometer

1977-03-03

1978-01-17

Haroian, Harry N.

Geometrical instruments

Scriber

Curved line

33 97, B43L 700, B43L 1300

Patent

active

040683826

ABSTRACT:
The instrument comprises a protractor secured on a plate beneath a reciprocable micrometer shaft which projects from a cylindrical housing that is secured on the plate adjacent the protractor. An extension of the shaft overlies part of the protractor and is pivotally connected by an indicator pin to the bifurcated end of a rod, which slides intermediate its ends in a turntable that pivots on the plate coaxially of the locus of the radial lines formed on the face of the protractor to represent various angular positions. When the operating thimble of the micrometer is rotated to shift the micrometer shaft, a point on the lower end of the indicator pin registers with different angular designation on the protractor. At any instant, the decimal graduation on the micrometer housing with which the forward end of the thimble registers will correspond to the tangential value of the angle then registering with the pointed end of the pin.

REFERENCES:
patent: 1678019 (1928-07-01), Oates
patent: 2136958 (1938-11-01), Tyson
patent: 3085345 (1963-04-01), Pearson
patent: 3322340 (1967-05-01), Frantland

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