Geometric pitch determining device

Details Geometric pitch determining device Geometric pitch determining device

1973-12-26

1978-01-10

Aegerter, Richard E.

Geometrical instruments

Indicator of direction of force traversing natural media

With angle or shape determination

33174C, G01B 356, G01C 928

Patent

active

040671160

ABSTRACT:
A hand operable device for conveniently determining geometric pitch of propellers. The device includes a level indicating device and a support means therefor. The support means has pressure surfaces engaging protrusions disposed thereon in a plane oblique to the axis of the level indicating device. The configuration is such that the axis of the level indicating device will lie in a horizontal plane only when the propeller pressure surface engaging protrusions are disposed upon a pressure surface of the propeller at a given distance from the axis of rotation thereof. Upon measurement of the distance from the axis of rotation of the propeller to the level indicating device, one may readily calculate the geometric pitch of the propeller by multiplying such distance by a constant characteristic value of the device.

REFERENCES:
patent: 1245340 (1917-11-01), Heath
patent: 1932103 (1933-10-01), Godfrey
patent: 2013850 (1935-09-01), Marishal
patent: 2214622 (1940-09-01), Lorenzen
patent: 2737726 (1956-03-01), Christiansen

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