US3073151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscometer
Assignee: GREAT LAKES CARBON Corp
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Filing: 1961-06-15
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Granted: 1963-01-15
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Expires: 1981-06-15
Abstract
No abstract record available.
Inventors
- 👤 James D Fann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:50
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
AN APPARATUS USEFUL FOR MEASURING THE VISCOSITY CHARACTERISTICS OF A FLUID COMPRISING IN COMBINATION A SUBSTANTIALLY NON-MAGNETIC CONTAINER FOR THE FLUID; ELECTROMAGNETIC WINDINGS SURROUNDING UPPER AND LOWER PORTIONS OF A CAVITY IN SAID CONTAINER FOR ESTABLISHING MAGNETIC FIELDS IN SAID PORTIONS OF SAID CONTAINER; A MOVABLE BOB HAVING AN APPRECIABLE VISCOUS DRAG AND BEING RESPONSIVE TO SAID FIELDS POSITIONED WITHIN SAID CAVITY AND FREELY MOVABLE IN THE FLUID; MEANS FOR INTERMITTENTLY AND REGULARLY ELECTRICALLY ENERGIZING EACH OF SAID WINDINGS WHEREBY SAID ELECTROMAGNETICALLY RESPONSIVE MOVABLE BOB IS CAUSED TO MOVE INTO THE RESULTANT MAGNETIC FIELDS; A SURFACE AT THE TOP OF THE CAVITY OF SAID CONTAINER WHICH GENERATES AND TRANSMITS SOUND WAVES WHEN STRUCK BY SAID BOB; MEANS FOR CONVERTING SAID SOUND WAVES INTO ELECTRICAL SIGNALS; MEANS FOR AMPLIFYING SAID ELECTRICAL SIGNALS; MEANS FOR DIFFERENTIATING AND PASSING SAID AMPLIFIED SIGNALS WHILE ATTENUATING SIGNALS OF OTHER FREQUENCIES; MEANS FOR TRIGGERING AND SHAPING SAID DIFFERENTIATED, AMPLIFIED SIGNALS; RELAY DRIVER MEANS RESPONSIVE TO SAID SHAPED SIGNALS AND CAPABLE OF OPENING A TIMING RELAY SHORTLY AFTER RECEIVING SAID SIGNALS; INTEGRATOR MEANS RESPONSIVE TO SAID TIMING RELAY HAVING CAPACITATIVE MEANS FOR BUILDING UP A CHARGE, WHICH CHARGE IS PROPORTIONAL TO THE TIME SAID RELAY IS CLOSED, SAID IN-
Claim 2
Independent Claim
202 words
AN APPARATUS USEFUL FOR MEASURING THE VISCOSITY CHARACTERISTICS OF A FLUID COMPRISING IN COMBINATION A SUBSTANTIALLY NON-MAGNETIC CONTAINER FOR THE FLUID; ELECTROMAGNETIC WINDINGS SURROUNDING UPPER AND LOWER PORTIONS OF A CAVITY IN SAID CONTAINER FOR ESTABLISHING MAGNETIC FIELDS IN SAID PORTIONS OF SAID CONTAINER; A MOVABLE BOB HAVING AN APPRECIABLE VISCOUS DRAG AND BEING RESPONSIVE TO SAID FIELDS POSITIONED WITHIN SAID CAVITY AND FREELY MOVABLE IN THE FLUID; MEANS FOR INTERMITTENTLY AND REGULARLY ELECTRICALLY ENERGIZING EACH OF SAID WINDINGS WHEREBY SAID ELECTROMAGNETICALLY RESPONSIVE MOVABLE BOB IS CAUSED TO MOVE INTO THE RESULTANT MAGNETIC FIELDS; A SURFACE AT THE TOP OF THE CAVITY OF SAID CONTAINER WHICH GENERATES AND TRANSMITS SOUND WAVES WHEN STRUCK BY SAID BOB; MEANS FOR CONVERTING SAID SOUND WAVES INTO ELECTRICAL SIGNALS; MEANS FOR AMPLIFYING SAID ELECTRICAL SIGNALS; MEANS FOR DIFFERENTIATING AND PASSING SAID AMPLIFIED SIGNALS WHILE ATTENUATING SIGNALS OF OTHER FREQUENCIES; MEANS FOR TRIGGERING AND SHAPING SAID DIFFERENTIATED, AMPLIFIED SIGNALS; RELAY DRIVER MEANS RESPONSIVE TO SAID SHAPED SIGNALS AND CAPABLE OF OPENING A TIMING RELAY SHORTLY AFTER RECEIVING SAID SIGNALS; INTEGRATOR MEANS RESPONSIVE TO SAID TIMING RELAY HAVING CAPACITATIVE MEANS FOR BUILDING UP A CHARGE, WHICH CHARGE IS PROPORTIONAL TO THE TIME SAID RELAY IS CLOSED, SAID IN-
References Cited (Backward Citations)
US2320218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |