Communications: electrical – Selective – Having electron beam device
Patent
1975-04-25
1977-03-01
Moskowitz, Nelson
Communications: electrical
Selective
Having electron beam device
340224, 340408, 346 3, G01V 122, H04B 714
Patent
active
040104427
ABSTRACT:
Seismometer group recorders amplify and make reproducible recordings of one or more seismometers employed in geophysical prospecting. There is no recording of the various groups at the controller instrument truck, as is common in the prior art. The operator needs assurance prior to collecting data through such recorders that the selectively activated group recorders (always considerably less than the total number placed in the field) are ready for the recording. This disclosure describes means for accomplishing such a status display which identifies those group recorders which have been turned on by the radio transmission system or equivalent, verifying that as to each recorder there is available recording medium, proper switching on of the power source, etc.
REFERENCES:
patent: 3161731 (1964-12-01), Seeley
patent: 3508260 (1970-04-01), Stein
patent: 3517316 (1970-06-01), Anderson et al.
patent: 3806864 (1974-04-01), Broding et al.
patent: 3852740 (1974-12-01), Haymes
patent: 3881166 (1975-04-01), Fort et al.
patent: 3886494 (1975-05-01), Kostelnicek et al.
patent: 3946357 (1976-03-01), Weinstein et al.
Moskowitz Nelson
Pottorf Newell
Standard Oil Company
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