Patent US3206980A successfully refreshed from Google Patents.
US3206980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state altimeter
Assignee: Kollsman Instrument Corp
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Filing: 1962-10-29
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Granted: 1965-09-21
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Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 William M Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:15
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0051; G01L9/0052; G01L9/0055
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
AN ALTIMETER FOR AIRCRAFT COMPRSING IN COMBINATION A PARTIALLY EVACUTED BELLOWS ADAPTED TO EXPAND AND CONTRACT IN RESPONSE TO CHANGES IN ATMOSPHERIC PRESSURE, AND A PIEZO-RESISTIVE FIBER CONSTRUCTED TO EFFECT A VARIATION IN ELECTRICAL RESISTANCE IN ACCORDANCE WITH THE MECHANICAL STRESSES INDUCED THEREIN; SAID BELLOWS INCLUDING A DIAPHRAGM END WALL DISTORTIVELY STRAINED RESPONSIVE TO SAID PRESSURE INDUCED CHANGES; SAID PIEZO-RESISTIVE FIBER MEANS DIRECTLY INDUCED TO SAID DIAPHRAGM TO PROVIDE A RESISTIVE RESPONSE ACCURATELY RELATED TO SAID PRESSURE INDUCED CHANGES; SAID PIEZORESISTIVE FIBER DIMENISONALLY RELATED TO SAID DIAPHRAGM TO PROVIDE A NEGLIGIBLE LOADING EFFECT ON THE PRESSURE RESPONSIVE DISTORTIVE STRAINING OF SAID DIAPHRAGM, WHEREBY THE STRESSES INDUCED IN SAID PIEZO-RESISTIVE FIBER ARE ACCURATELY RESPONSIVE TO CHANGES IN ATMOSPHERIC PRESSURE; CONDUCTOR MEANS CONNECTED TO SAID PIEZORESISTIVE FIBER TO PROVIDE A RESISTIVE OUTPUT SIGNAL RESPONSIVE TO THE STRESSES DEVELOPED THEREIN, FOR ACCURATELY INDICATING ALTITUDE.
Claim 2
Dependent Claim
141 words
AN ALTIMETER FOR AIRCRAFT COMPRSING IN COMBINATION A PARTIALLY EVACUTED BELLOWS ADAPTED TO EXPAND AND CONTRACT IN RESPONSE TO CHANGES IN ATMOSPHERIC PRESSURE, AND A PIEZO-RESISTIVE FIBER CONSTRUCTED TO EFFECT A VARIATION IN ELECTRICAL RESISTANCE IN ACCORDANCE WITH THE MECHANICAL STRESSES INDUCED THEREIN; SAID BELLOWS INCLUDING A DIAPHRAGM END WALL DISTORTIVELY STRAINED RESPONSIVE TO SAID PRESSURE INDUCED CHANGES; SAID PIEZO-RESISTIVE FIBER MEANS DIRECTLY INDUCED TO SAID DIAPHRAGM TO PROVIDE A RESISTIVE RESPONSE ACCURATELY RELATED TO SAID PRESSURE INDUCED CHANGES; SAID PIEZORESISTIVE FIBER DIMENISONALLY RELATED TO SAID DIAPHRAGM TO PROVIDE A NEGLIGIBLE LOADING EFFECT ON THE PRESSURE RESPONSIVE DISTORTIVE STRAINING OF SAID DIAPHRAGM, WHEREBY THE STRESSES INDUCED IN SAID PIEZO-RESISTIVE FIBER ARE ACCURATELY RESPONSIVE TO CHANGES IN ATMOSPHERIC PRESSURE; CONDUCTOR MEANS CONNECTED TO SAID PIEZORESISTIVE FIBER TO PROVIDE A RESISTIVE OUTPUT SIGNAL RESPONSIVE TO THE STRESSES DEVELOPED THEREIN, FOR ACCURATELY INDICATING ALTITUDE.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |