US3239802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic gain control system
Assignee: Western Geophysical Company of America
•
Filing: 1962-10-16
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Granted: 1966-03-08
•
Expires: 1982-10-16
Abstract
No abstract record available.
Inventors
- 👤 Sheffet David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:09
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/24; G01V1/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN COMBINATION, IN A GEOPHYSICAL RECORDING SYSTEM: AN AMPLIFIER; A PROGRAMMABLE GAIN CONTROL CIRCUIT HAVING AN INPUT, AND AN OUTPUT CONNECTED TO CONTROL THE GAIN OF SAID AMPLIFIER; A FUNCTION GENERATOR HAVING A CONTROL VOLTAGE OUTPUT WHICH IS AN ARBITRARY FUNCTION OF TIME; MEANS FOR APPLYING SAID OUTPUT OF SAID FUNCTION GENERATOR TO SAID INPUT OF SAID GAIN CONTROL CIRCUIT TO THEREBY VARY THE GAIN OF SAID AMPLIFIER; SAID AMPLIFIER HAVING A PREDETERMINED NONLINEAR ATTENUATION VERSUS CONTROL VOLTAGE CHARACTERISTIC; AND COMPENSATORY ADJUSTMENT MEANS INCLUDED IN SAID FUNCTION GENERATOR FOR PROVIDING A LINEAR DECIBEL ATTENUATION SCALE AT THE OUTPUT OF SAID AMPLIFIER WHICH ARE SEPARATELY ADJUSTABLE FOR EACH OF A SERIES OF SUCCESSIVE TIME INTERVALS.
Claim 2
Dependent Claim
114 words
IN COMBINATION, IN A GEOPHYSICAL RECORDING SYSTEM: AN AMPLIFIER; A PROGRAMMABLE GAIN CONTROL CIRCUIT HAVING AN INPUT, AND AN OUTPUT CONNECTED TO CONTROL THE GAIN OF SAID AMPLIFIER; A FUNCTION GENERATOR HAVING A CONTROL VOLTAGE OUTPUT WHICH IS AN ARBITRARY FUNCTION OF TIME; MEANS FOR APPLYING SAID OUTPUT OF SAID FUNCTION GENERATOR TO SAID INPUT OF SAID GAIN CONTROL CIRCUIT TO THEREBY VARY THE GAIN OF SAID AMPLIFIER; SAID AMPLIFIER HAVING A PREDETERMINED NONLINEAR ATTENUATION VERSUS CONTROL VOLTAGE CHARACTERISTIC; AND COMPENSATORY ADJUSTMENT MEANS INCLUDED IN SAID FUNCTION GENERATOR FOR PROVIDING A LINEAR DECIBEL ATTENUATION SCALE AT THE OUTPUT OF SAID AMPLIFIER WHICH ARE SEPARATELY ADJUSTABLE FOR EACH OF A SERIES OF SUCCESSIVE TIME INTERVALS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |