Protractor with digital readout

Details Protractor with digital readout Protractor with digital readout

1974-08-19

1976-12-14

Aegerter, Richard E.

Geometrical instruments

Area integrators

Electrical

33 1PT, G01B 330, G01B 524

Patent

active

039966704

ABSTRACT:
A protractor having a sine bar connected to the shaft of an electronic encoder and supported to a carriage movable axially and horizontally, but retained in fixed relationship to a table supporting a propeller for measuring and inspecting the blade angles thereof is characterized by its improved accuracy and repeatability.

REFERENCES:
patent: 2000926 (1935-05-01), Cox
patent: 2359018 (1944-09-01), Balk
patent: 2369425 (1945-02-01), Becker
patent: 2397300 (1946-03-01), Tilton
patent: 2481062 (1949-09-01), Anderson
patent: 3195410 (1965-07-01), Colten et al.
patent: 3816930 (1974-06-01), Edenholm

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