Propeller pitch gauge

Details Propeller pitch gauge Propeller pitch gauge

1992-03-13

1992-10-06

Haroian, Harry N.

Geometrical instruments

Gauge

Pitchometer

G01B 730, G01B 534

Patent

active

051520710

ABSTRACT:
A pitch gauge for measuring the pitch of a propeller blade which comprises an engaging portion for insertion into a propeller hub, a scale provided on the engaging portion to measure the depth that the engaging portion is inserted into the propeller hub, and a contacting portion for contacting a blade on the propeller hub which prevents further insertion of the engaging portion when the contacting portion contacts the blade. By inserting the pitch gauge into the propeller hub at two different positions a predetermined rotational angle apart, two axial reference points can be obtained. From the axial reference points and the predetermined rotational distance, the pitch of a propeller blade can be computed.

REFERENCES:
patent: 284427 (1883-09-01), Hutton
patent: 1245340 (1917-11-01), Heath
patent: 2358987 (1944-09-01), MacKay
patent: 2749623 (1956-06-01), LaBarre, Jr. et al.
patent: 3380170 (1968-04-01), Read
patent: 4056888 (1977-11-01), Hughey
patent: 4642901 (1987-02-01), Webb

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