Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1992-05-26
1993-10-12
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
43 171, G01S 1596
Patent
active
052532208
ABSTRACT:
An improved apparatus and method for finding fish both onshore and offshore, and under a diversity of marine conditions is provided. A specially configured rod and reel combination enables the electrical communication between a sensor float disposed at the remote open end of the rod and a display unit releasably attached to the reel portion disposed opposite of the reel. A transducer is disposed vertically within a foam matrix positioned in a sensor float. Electrical signals are generated within a display unit and then transmitted to the transducer. These signals are conventionally converted into corresponding ultrasonic signals which are directed downward into the environing water. The ultrasonic signals travel until deterred by either fish, an unknown obstacle, or the bottom of the body of water. These signals are then echoed back to the transducer and converted into corresponding electrical signals, for transmission through the conductor cable to the display unit. The sensor float contains a diode on its top for easy viewing under marine conditions. Replaceable wiper means comprising a flexible member of conical cross section which axially receives said conductor cable is also provided.
REFERENCES:
patent: 2680925 (1954-06-01), Grunwald et al.
patent: 2700787 (1955-02-01), Trapanese
patent: 2713228 (1955-07-01), Grunwald
patent: 3020666 (1962-02-01), Hull
patent: 3846930 (1974-11-01), Brown
patent: 4995009 (1991-02-01), Altmire et al.
patent: 5088223 (1992-02-01), Chu
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