US3578102A
Expired / Lapsed
US
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Seismic generator
Assignee: Shell USA Inc
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Filing: 1968-11-25
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Granted: 1971-05-11
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Expires: 1988-11-25
Abstract
Abstract An inertial mass vibratory seismic signal generating system having tunable resonance over the generating frequency range.
Inventors
- 👤 Frederick W Ross
- 👤 Peter Van Horn Serrell
- 👤 Howard L Shatto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:31
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/143; G01V1/155; Y; Y10; Y10S; Y10S181/00; Y10S181/40; Y10S181/401
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
90 words
A resonant seismic signal generating system, said system comprising: coupling means adapted for coupling said system to the surface of an earth formation; a inertia mass reciprocably supported relative to said coupling means; adjustable elastic means including a cylindrical chamber operatively coupling said inertia mass to said coupling means; said inertia mass comprising a piston reciprocably mounted in said chamber; a hydraulic oscillator operatively coupled in parallel with said elastic means between said inertia mass and said coupling means to reciprocably move said inertia mass relative to said coupling means.
Claim 2
Dependent Claim
90 words
A resonant seismic signal generating system, said system comprising: coupling means adapted for coupling said system to the surface of an earth formation; a inertia mass reciprocably supported relative to said coupling means; adjustable elastic means including a cylindrical chamber operatively coupling said inertia mass to said coupling means; said inertia mass comprising a piston reciprocably mounted in said chamber; a hydraulic oscillator operatively coupled in parallel with said elastic means between said inertia mass and said coupling means to reciprocably move said inertia mass relative to said coupling means.
Claim 3
Dependent Claim
19 words
The system of claim 1 comprising means to adjust the center of stroke of said piston in said chamber.
Claim 4
Dependent Claim
62 words
The system of claim 1 wherein the means to adjust the center of stroke of said piston includes position responsive means responsive to the position of said piston within said cylinder and initiating a signal in response thereto; controller means responsive to said signal to control the relative amount of air in said cylindrical chamber to either side of said piston means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |