Electrical transmission or interconnection systems – Wave form or wave shape determinative or pulse-producing...
Patent
1974-08-23
1977-07-26
Scott, James R.
Electrical transmission or interconnection systems
Wave form or wave shape determinative or pulse-producing...
H03K 300
Patent
active
040385604
ABSTRACT:
An apparatus for daylight shrimp fishing is disclosed. The apparatus includes a plurality of Otter trawls each having an electrode array and a pulse circuit. Each pulse circuit includes a capacitor which is discharged by a reversal of current to the capacitor which fires an SCR. A control unit located on the boat effects the discharging of the respective capacitors in a predetermined sequence to equalize the load on an alternating current generator. The electrode array has a plurality of electrodes which trail behind a bus extending between the trawl doors at a distance above the bottom. The electrodes are weighted to slide along the bottom and have an insulating material disposed above the conductor so that the electric current pulses are directed into the bottom rather than being dissipated upwardly into the water. The design of the bus and the electrode array is such as to insure uniform current density over the array.
REFERENCES:
patent: 2847569 (1958-08-01), Finklestein
patent: 3045148 (1962-07-01), McNulty et al.
patent: 3218484 (1965-11-01), Matusche
patent: 3483649 (1969-12-01), Klima et al.
patent: 3523211 (1970-08-01), Oishi et al.
Hawthorne M. Marion
Newman James L.
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