Patent US3197675A successfully refreshed from Google Patents.
US3197675A
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Method and apparatus for high-speed photography of gas flow phenomena
Assignee: Individual
•
Filing: 1961-01-30
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Granted: 1965-07-27
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Expires: 1981-01-30
Abstract
No abstract record available.
Inventors
- 👤 Fruengel Frank
- 👤 Thorwart Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:08
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/0006; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/537
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
154 words
IN APPARATUS FOR HIGH-SPEED PHOTOGRAPHY OF GAS FLOW PHENOMENA INCLUDING CHANNEL MEANS FOR DELIVERING A STREAM OF GAS ALONG A PREDETERMINED PATH AT A GAS STREAM VELOCITY OF BETWEEN 5 AND 3,000 METERS PER SECOND, IN COMBINATION, SPARK GAP MEANS POSITIONED ACROSS THE PATH OF THE GAS STREAM PRODUCED BY SAID CHANNEL MEANS FOR DIRECTING SPARK DISCHARGES ACROSS SAID STREAM OF GAS; PULSE INPUT MEANS FOR PROVIDING PULSE SEQUENCES OF A FREQUENCY BETWEEN 5,000 AND 300,000 PULSES PER SECOND AND VERY SHORT PULSE DURATION; AND PULSE PROVIDING MEANS COUPLING SAID PULSE INPUT MEANS TO SAID SPARK GAP MEANS FOR CAUSING BETWEEN 5,000 AND 300,000 VERY SHORT SPARK DISCHARGES PER SECOND WHILE SAID GAS STREAM IS MOVING AT SAID GAS STREAM VELOCITY OF BETWEEN 5 AND 3,000 METERS PER SECOND, THE ENERGY OF SAID SPARK DISCHARGES BEING SMALL ENOUGH TO CREATE MINIMUM GAS FLOW DISTURBANCE BUT SUFFICIENT TO PROVIDE LIGHT FOR PHOTOGRAPHING THE GAS STREAM
References Cited (Backward Citations)
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US2795738A
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US2933647A
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US3019371A
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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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |