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US 4,207,568 AGranted
Underwater communications system
AssigneeTechnology Development Corporation
InventorNorman C. MacLeod
Life of this patent
Estimating the term…
Abstract
An improved method and apparatus for underwater communication, the apparatus comprising two dipoles disposed in a common body of water, both dipoles including a pair of separated electrodes, a transmitter connected to one dipole, a receiver connected to the other dipole and a nonconducting hose or tube extending between one of the electrodes of a first dipole and one of the electrodes of the second dipole.
Claims17
An improved underwater communications system comprising:
- first antenna means including first and second electrodes spaced apart by a first distance, and for submersion in a body of water at a first location;
- a first transmission device connected to said first antenna means for causing an electric transmission field containing communication information to radiate outwardly from said first antenna means;
- a second antenna means separated from said first antenna means by a second distance and including third and fourth electrodes spaced apart by a third distance, said second antenna means being for submersion in said body of water at a second location remote from said first location but within the range of said transmission field;
- a first reception device connected to said second antenna means for receiving the communication information contained within said electric transmission field;
- and
- an elongated, electrically nonconducting tube means extending from said first location to said second location, said tube means being filled with an electrically conductive fluid and having a first end portion coupled to said second electrode, and a second end portion coupled to said fourth electrode such that the conductive fluid within said tube means provides a first conductive path between said second and fourth electrode and said body of water provide a second conduction path between said first and third electrodes.
3 more elements
An improved method for underwater transmission comprising the steps of,
- disposing first, a second, a third and a fourth electrode in a common body of water,
- extending an elongated, nonconducting tube means that is filled with a conducting fluid between said second electrode and fourth electrode,
- connecting said first and second electrodes to an electric field transmission device,
- connecting said third and fourth electrodes to an electric field reception device,
- whereby said tube means acts as a wave guide for directing an electric transmission field between said combined first and second electrodes and said combined third and fourth electrodes.
2 more elements
Dependencies are inferred from the claim text.