Overload protection control circuit for marine engines

Details Overload protection control circuit for marine engines Overload protection control circuit for marine engines

1978-08-24

1980-12-16

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Interrelated controls for impeller and drive means

Pitch adjustment and throttle regulation with condition...

416 43, B63H 310

Patent

active

042394546

ABSTRACT:
An overload protection control circuit for marine engines, in which a propeller pitch control signal, as initiated by the operator and transmitted to a servo-positioner for setting the propeller pitch, is modified by a speed control signal, also initiated by the operator, for setting the speed of the ship through a speed governor device, so that the pitch of the propeller is automatically maintained at a degree compatible with the ship speed. According to the invention, an overload limiting valve device is interposed in the protection control circuit and is preset to respond to a critical engine load condition to effect operation of the servo-positioner to a neutral position in which propeller pitch is reduced to a safe degree.

REFERENCES:
patent: 2878880 (1959-03-01), Gillespie
patent: 2923361 (1960-02-01), Best
patent: 2958381 (1960-11-01), Stevens et al.
patent: 3088523 (1963-05-01), Smalley et al.
patent: 3302724 (1967-02-01), Brooks et al.
patent: 3588272 (1971-06-01), Lindahl et al.
patent: 3724970 (1973-04-01), Kobelt
patent: 3826590 (1974-07-01), Kobelt
patent: 3915590 (1975-10-01), Bjorknas
patent: 4142829 (1979-03-01), Inoue et al.

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