US2715831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sensing changes in the specific gravity of a liquid
Assignee: Napier Turbochargers Ltd
•
Filing: 1953-09-08
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Granted: 1955-08-23
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Expires: 1973-09-08
Abstract
No abstract record available.
Inventors
- 👤 Catford Adrian Leslie
- 👤 Dunford Thomas Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:35
CPC Classifications
F; F02; F02D; F02D1/00; F02D2700/00; F02D2700/02; F02D2700/0269; F02D2700/0282; F02D2700/0284; F02D2700/0294
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
APPARATUS FOR SENSING CHANGES IN THE SPECIFIC GRAVITY OF A LIQUID, COMPRISING A ROTARY IMPELLER ADAPTED TO RUN IN THE LIQUID, SAID IMPELLER THEREBY PRODUCING A PRESSURE DIFFERENTIAL PROPORTIONAL TO THE SPECIFIC GRAVITY OF THE LIQUID AND TO THE SQUARE OF THE SPEED OF ROTATION, MEANS FOR CONVERTING THIS PRESSURE DIFFERENTIAL INTO A FORCE, A ROTARY DEVICE ADAPTED TO PRODUCE A FORCE PROPORTIONAL TO THE SQUARE OF ITS SPEED OF ROTATION, MEANS FOR DRIVING SAID ROTARY DEVICE SYNCHRONOUSLY WITH SAID IMPELLER, A BALANCING DEVICE UPON WHICH SAID TWO FORCES ACT IN OPPOSITION, A MOVABLE PART ADAPTED TO MAINTAIN SAID BALANCING DEVICE IN EQUILIBRIUM, AND AN OUTPUT MEMBER ASSOCIATED WITH SAID MOVABLE PART.
Claim 2
Dependent Claim
112 words
APPARATUS FOR SENSING CHANGES IN THE SPECIFIC GRAVITY OF A LIQUID, COMPRISING A ROTARY IMPELLER ADAPTED TO RUN IN THE LIQUID, SAID IMPELLER THEREBY PRODUCING A PRESSURE DIFFERENTIAL PROPORTIONAL TO THE SPECIFIC GRAVITY OF THE LIQUID AND TO THE SQUARE OF THE SPEED OF ROTATION, MEANS FOR CONVERTING THIS PRESSURE DIFFERENTIAL INTO A FORCE, A ROTARY DEVICE ADAPTED TO PRODUCE A FORCE PROPORTIONAL TO THE SQUARE OF ITS SPEED OF ROTATION, MEANS FOR DRIVING SAID ROTARY DEVICE SYNCHRONOUSLY WITH SAID IMPELLER, A BALANCING DEVICE UPON WHICH SAID TWO FORCES ACT IN OPPOSITION, A MOVABLE PART ADAPTED TO MAINTAIN SAID BALANCING DEVICE IN EQUILIBRIUM, AND AN OUTPUT MEMBER ASSOCIATED WITH SAID MOVABLE PART.
References Cited (Backward Citations)
US2615328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |