Patent US3277438A successfully refreshed from Google Patents.
US3277438A
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Method and apparatus for programmed gain control of a seismic amplifier
Assignee: Texas Instruments Inc
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Filing: 1963-06-27
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Granted: 1966-10-04
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Expires: 1983-06-27
Abstract
No abstract record available.
Inventors
- 👤 Walter B Ford
- 👤 Gerald R Schlechte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:24
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0047; H03G3/00; H03G3/20; H03G3/30; H03G3/3005; H03G3/301
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A SYSTEM FOR RECEIVING AND AMPLIFYING A SEISMIC SIGNAL DERIVED FROM A SEISMIC DISTURBANCE, SAID SYSTEM INCLUDING A SEISMOMETER CONNECTED TO AN AMPLIFIER, THE METHOD OF CONTROLLING THE GAIN OF SAID AMPLIFIER WHICH COMPRISES THE STEPS OF (A) SAMPLING THE AMPLITUDE OF SAID SEISMIC SIGNAL UPON ITS INITIAL ARRIVAL AT SAID SEISMOMETER AND FOR A PREDETERMINED PERIOD THEREAFTER, (B) SETTING THE GAIN OF SAID AMPLIFIER PROPORTIONAL TO SAID AMPLITUDE AT THE END OF SAID PERIOD, AND (C) THEREAFTER VARYING SAID GAIN ACCORDING TO A PRESELECTED FUNCTIONS OF TIME.
Claim 2
Dependent Claim
89 words
IN A SYSTEM FOR RECEIVING AND AMPLIFYING A SEISMIC SIGNAL DERIVED FROM A SEISMIC DISTURBANCE, SAID SYSTEM INCLUDING A SEISMOMETER CONNECTED TO AN AMPLIFIER, THE METHOD OF CONTROLLING THE GAIN OF SAID AMPLIFIER WHICH COMPRISES THE STEPS OF (A) SAMPLING THE AMPLITUDE OF SAID SEISMIC SIGNAL UPON ITS INITIAL ARRIVAL AT SAID SEISMOMETER AND FOR A PREDETERMINED PERIOD THEREAFTER, (B) SETTING THE GAIN OF SAID AMPLIFIER PROPORTIONAL TO SAID AMPLITUDE AT THE END OF SAID PERIOD, AND (C) THEREAFTER VARYING SAID GAIN ACCORDING TO A PRESELECTED FUNCTIONS OF TIME.
References Cited (Backward Citations)
US2838742A
Cited
US2982919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |