Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1978-09-25
1980-02-19
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
310232, 310253, 339 5R, 339 6R, G01S 756
Patent
active
041897021
ABSTRACT:
An improved slip ring and brush assembly such as for carrying the return signal pulse to a glow discharge tube on a rotating disc sonar. The rotating disc is made of insulating material and has a cylindrical hub which is adapted to fit over a corresponding hub on a motor shaft. Annular slip rings made of conductive plastic are adapted to slip over the cylindrical hub and are indexed against relative rotation by means of cylindrical bulges or projections on opposite sides of the hub. These projections serve to carry the electrical connections, in the form of threaded screws and springs that are adapted to contact the slip rings, one set for one slip ring, and the other for the other slip ring. The slip rings are separated by thin insulating washers of larger diameter than the rings. The brushes are made of graphite fibers and have excellent flexibility, conductivity and long life.
REFERENCES:
patent: 3122719 (1964-02-01), Grieg
patent: 3191084 (1965-06-01), Ooka et al.
patent: 3382387 (1968-05-01), Marshall
patent: 3886386 (1975-05-01), Hillig
patent: 3891868 (1975-06-01), Joyce
patent: 4140832 (1979-02-01), Menegay
Farley Richard A.
Lowrance Electronics, Inc.
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