Recorders – Writers – Receiver and marker movable
Patent
1976-02-09
1977-08-02
Hartary, Joseph W.
Recorders
Writers
Receiver and marker movable
318415, 318619, 346136, 346139D, G01D 1524
Patent
active
040391272
ABSTRACT:
An apparatus for plotting information, e.g., seismic data, onto a continuous sheet of a recording medium, e.g., photographic film. The film travels from a supply reel, over an advance roller, across a flat exposure surface, and onto a takeup roller. Torque motors apply equal but opposite torques to the supply reel and the takeup reel to maintain the film in tension to insure that the film will lie flat on the exposure surface during the plotting operation. A stepping motor rotates advance roller to move the film a precise amount across the exposure surface at desired times during the plotting operation. A camera, e.g., cathode ray tube, which receives data and projects it onto the film on the exposure surface, is mounted on a carriage which is swept back and forth across the exposure surface by means of a lead screw driven by a precision stepping motor. Control circuitry means is provided which not only drives the stepping motor and, hence, the carriage at a constant, defined speed during the plotting portion of a sweep but also provides for the proper acceleration and deceleration of the motor during each sweep of the carriage.
REFERENCES:
patent: 2976107 (1961-03-01), Klein et al.
patent: 3203636 (1965-08-01), Owen
patent: 3373329 (1968-03-01), Kaiser
patent: 3411058 (1968-11-01), Madsen et al.
patent: 3434158 (1969-03-01), Stauffer et al.
patent: 3465295 (1969-09-01), Witt et al.
patent: 3588911 (1971-06-01), Luke et al.
Huffhines Donald F.
Jones J. S.
Smith Clarence G.
Faulconer Drude
Hartary Joseph W.
Huggett C. A.
Mobil Oil Corporation
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