Patent US2490342A successfully refreshed from Google Patents.
Patent US3174341A successfully refreshed from Google Patents.
US3174341A
Expired / Lapsed
US
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High-speed rotating apparatus
Assignee: Hitachi Ltd
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Filing: 1962-11-20
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Granted: 1965-03-23
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Expires: 1982-11-20
Abstract
No abstract record available.
Inventors
- 👤 Sudo Takuro
- 👤 Chiba Saburo
- 👤 Goto Yasuyuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:11
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0407; B04B5/0414; B04B15/00; B04B15/02; B04B15/06; G; G01; G01K; G01K13/00; G01K13/04; G01K13/08; G01K7/00; G01K7/16; G01K7/18; G01K7/20; G01K7/203; G01K7/34; G01K7/343
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
A HIGH-SPEED ROTATING APPARATUS COMPRISING A HIGHSPEED ROTATING BODY, A STATIONARY STRUCTURE, AND A THERMOMETRIC SYSTEM FOR CONTINUOUSLY MEASURING THE TEMPERATURE WITHIN THE SAID ROTATING BODY, THE SAID THERMOMETRIC SYSTEM CONSISTING OF A TRANSISTOR, R-. TYPE OSCILLATOR, WHICH IS POSITIONED AT THE CENTRAL PORTION OF SAID ROTATING BODY, AND IN WHICH AN R-L TYPE PASSIVE NETWORK COMPOSED OF AT LEAST THREE STAGES OF TEMPERATURE-SENSITIVE RESISTANCE ELEMENTS R AND INDUCTANCES L IS INSERTED IN THE OUTPUT SIDE AND THE INPUT SIDE OF A SINGLE AMPLIFIER CONSISTING OF ONE BAG-GROUNDED TYPE TRANSISTOR ELEMENT, A POSITIVE FEEDBACK IS ESTABLISHED FROM ONE ELEMENT OF THE SAID PASSIVE NETWORK TO THE EMITTER INPUT SIDE, AND THE IMPEDANCE RATIO OF EACH OF THE ELEMENTS OF THE SAID PASSIVE NETWORK IS SO SELECTED THAT THE REQUIRED AMPLIFICATION BECOMES LESS THAN UNITY, A RADIATION ELECTROMOTIVE FORCE DEVICE POSITIONED AT THE CENTRAL PORTIONS OF THE SAID ROTATING BODY, MEASURING MEANS PROVIDED OUTSIDE OF THE SAID ROTATING BODY, AND AN ELECTROSTATIC COUPLING DEVICE, CONSISTING OF A CONDUCTIVE ROTATING ELECTRODE PROVIDED ON THE SAID ROTATING BODY AND A CONDUCTIVE STATIONARY ELECTRODE PROVIDED ON THE SAID STATIONARY STRUCTURE AND DISPOSED TO FACE THE SAID ROTATING ELECTRODE, FOR LEADING OUT THE OUTPUT OF THE SAID OSCILLATOR TO THE SAID MEASURING MEANS.
Claim 2
Dependent Claim
208 words
A HIGH-SPEED ROTATING APPARATUS COMPRISING A HIGHSPEED ROTATING BODY, A STATIONARY STRUCTURE, AND A THERMOMETRIC SYSTEM FOR CONTINUOUSLY MEASURING THE TEMPERATURE WITHIN THE SAID ROTATING BODY, THE SAID THERMOMETRIC SYSTEM CONSISTING OF A TRANSISTOR, R-. TYPE OSCILLATOR, WHICH IS POSITIONED AT THE CENTRAL PORTION OF SAID ROTATING BODY, AND IN WHICH AN R-L TYPE PASSIVE NETWORK COMPOSED OF AT LEAST THREE STAGES OF TEMPERATURE-SENSITIVE RESISTANCE ELEMENTS R AND INDUCTANCES L IS INSERTED IN THE OUTPUT SIDE AND THE INPUT SIDE OF A SINGLE AMPLIFIER CONSISTING OF ONE BAG-GROUNDED TYPE TRANSISTOR ELEMENT, A POSITIVE FEEDBACK IS ESTABLISHED FROM ONE ELEMENT OF THE SAID PASSIVE NETWORK TO THE EMITTER INPUT SIDE, AND THE IMPEDANCE RATIO OF EACH OF THE ELEMENTS OF THE SAID PASSIVE NETWORK IS SO SELECTED THAT THE REQUIRED AMPLIFICATION BECOMES LESS THAN UNITY, A RADIATION ELECTROMOTIVE FORCE DEVICE POSITIONED AT THE CENTRAL PORTIONS OF THE SAID ROTATING BODY, MEASURING MEANS PROVIDED OUTSIDE OF THE SAID ROTATING BODY, AND AN ELECTROSTATIC COUPLING DEVICE, CONSISTING OF A CONDUCTIVE ROTATING ELECTRODE PROVIDED ON THE SAID ROTATING BODY AND A CONDUCTIVE STATIONARY ELECTRODE PROVIDED ON THE SAID STATIONARY STRUCTURE AND DISPOSED TO FACE THE SAID ROTATING ELECTRODE, FOR LEADING OUT THE OUTPUT OF THE SAID OSCILLATOR TO THE SAID MEASURING MEANS.
References Cited (Backward Citations)
US2370818A
Cited
US3029642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |