Depth controllers with controllable negative and uncontrollable

Details Depth controllers with controllable negative and uncontrollable Depth controllers with controllable negative and uncontrollable

1974-05-08

1976-06-01

Wilbur, Maynard R.

Communications: electrical

Selective

Having indication or alarm

114235B, G01V 100

Patent

active

039613038

ABSTRACT:
A depth controller whose streamlined body has only negative variable lift-producing means, such as a pair of vanes that can produce a controllable downward force. Embodied in the controller are also means providing an uncontrollable upward force. The vanes are preferably movable by translation or rotation in a single plane, inclined relative to the horizontal. Depth control means are operatively coupled to retract the vanes inward as the controller moves from the water surface down to a reference depth. The uncontrollable positive lift producing means return the controller to the desired depth should it fall below the reference depth. Each controller can be used to effectively maintain a seismic streamer cable section at or near the desired reference depth.

REFERENCES:
patent: 3380424 (1968-04-01), Bowker et al.
patent: 3680520 (1972-08-01), Smith
patent: 3839985 (1974-10-01), Modert

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