Telegraphy – Systems – Simplex-reversing periodic
Patent
1975-06-09
1976-08-10
Griffin, Robert L.
Telegraphy
Systems
Simplex-reversing periodic
178DIG1, 178DIG38, H04N 718
Patent
active
039743306
ABSTRACT:
A miniature submergible inspection device is provided for the visual inspection and survey of the strata of dry or water-filled bore holes providing data for video display or recording at the earth's surface and controllable therefrom. Adapted for reversing azimuth scan of the bore hole surface, the raster scan generates a display presented to the operator that does not rotate with the scanning of the surface and that is always upright.
REFERENCES:
patent: 2632801 (1953-03-01), Donaldson
patent: 2849530 (1958-08-01), Fleet
patent: 3761623 (1973-09-01), Hara
patent: 3780224 (1973-12-01), Levine
Askowith Burton J.
Ellis Merphis C.
Oberlies Robert H.
Peterson Frank A.
Prasad Parmanand
Coles Edward L.
Griffin Robert L.
Sperry Rand Corporation
Terry Howard P.
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