Aircraft engine propulsor blade pitch sensing

Details Aircraft engine propulsor blade pitch sensing Aircraft engine propulsor blade pitch sensing

1989-05-01

1990-08-14

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Actuation directly responsive to magnetic or electrical effect

416147, 416153, 416 89, B64C 1144

Patent

active

049483374

ABSTRACT:
Pitch of a blade (12) on an aircraft engine propulsor (14) is determined by employing a shaft (22) and a bevel gear (23) to alter relative circumferential distance between a first set of teeth (25) and a second set of teeth (26). Said teeth (25,26) creates fluctuations in a magnetic field generated by a magnetic poll piece (28a) wherein said fluctuations are converted to a signal (30) by a coil (28) located on a subsequent engine section (8). The time between pulses of the signal (30) is a function of said relative circumferential distance whereby the time between pulses is a function of the pitch of the blade (12).

REFERENCES:
patent: 3997131 (1976-12-01), Kling
patent: 4161658 (1979-07-01), Patrick
patent: 4556366 (1985-12-01), Sargisson et al.
patent: 4589611 (1986-05-01), Ramme et al.
patent: 4882936 (1989-11-01), Garshelis

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