Fish repelling apparatus using a plurality of series connected pulse generators to produce an optimized electric field
US4750451A · kind A · utility
Inventor
Key dates
| Filing date | Feb 3, 1987 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | Feb 3, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K79/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An electric barrier for discouraging the passage of fishes through a natural or artificial waterway, or for repelling fishes from the vicinity of an underwater structure in a waterway. A submerged electrode array is provided for electrifying at least a portion of a waterway when energized by a plurality of electric pulse generators. The outputs of the pulse generators are connected in series and each is also connected to a separate electrode of the array so that when synchronously triggered, the outputs are in phase and additive in amplitude along the electrode array. In a preferred embodiment of the invention, each pulse generator is adjustable in output amplitude so that the electric field gradients along the electrode array can be adjusted to minimize the injury to fishes repelled by the barrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.