Patent US3077781A successfully refreshed from Google Patents.
US3077781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring and balancing systems for high-speed machines
Assignee: AMF Inc
•
Filing: 1958-04-04
•
Granted: 1963-02-19
•
Expires: 1978-04-04
Abstract
No abstract record available.
Inventors
- 👤 Saul H Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:30
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/14; G01M1/16; G01M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A SYSTEM FOR DETERMINING THE AMPLITUDES AND ANGULAR POSITIONS OF UNBALANCE OF A ROTOR DRIVEN BY A PRIME MOVER WITH REFERENCE TO TWO SELECTED PLANES DISPOSED NORMAL TO THE AXIS OF ROTATION OF THE ROTOR AND THE SYSTEM INCLUDING VIBRATION PICKUPS AT EACH PLANE CONNECTED RESPECTIVELY WITH SEPARATE ELECTRICAL SIGNAL CHANNELS OF THE SYSTEM AND INCLUDING MEANS FOR CANCELLING IN THE CHANNEL ASSOCIATED WITH EACH PLANE THE EFFECT OF UNBALANCES IN THE OTHER PLANE, THE COMBINATION THEREWITH FOR DETERMINING SAID UNBALANCES WITH IMPROVED ACCURACY OF MEANS COMPRISING, SPEED CONTROL MEANS FOR MAINTAINING THE ROTATION OF THE PRIME MOVER AT A PRESELECTED RATE; AMPLIFIER MEANS COUPLED WITH TUNABLE BAND-PASS FILTER MEANS AND CONNECTED TO SELECTIVELY RECEIVE THE SIGNALS FROM ONE OF SAID CHANNELS, AND SAID FILTER MEANS INCLUDING TUNING MEANS ADJUSTABLE TO
Claim 2
Dependent Claim
132 words
IN A SYSTEM FOR DETERMINING THE AMPLITUDES AND ANGULAR POSITIONS OF UNBALANCE OF A ROTOR DRIVEN BY A PRIME MOVER WITH REFERENCE TO TWO SELECTED PLANES DISPOSED NORMAL TO THE AXIS OF ROTATION OF THE ROTOR AND THE SYSTEM INCLUDING VIBRATION PICKUPS AT EACH PLANE CONNECTED RESPECTIVELY WITH SEPARATE ELECTRICAL SIGNAL CHANNELS OF THE SYSTEM AND INCLUDING MEANS FOR CANCELLING IN THE CHANNEL ASSOCIATED WITH EACH PLANE THE EFFECT OF UNBALANCES IN THE OTHER PLANE, THE COMBINATION THEREWITH FOR DETERMINING SAID UNBALANCES WITH IMPROVED ACCURACY OF MEANS COMPRISING, SPEED CONTROL MEANS FOR MAINTAINING THE ROTATION OF THE PRIME MOVER AT A PRESELECTED RATE; AMPLIFIER MEANS COUPLED WITH TUNABLE BAND-PASS FILTER MEANS AND CONNECTED TO SELECTIVELY RECEIVE THE SIGNALS FROM ONE OF SAID CHANNELS, AND SAID FILTER MEANS INCLUDING TUNING MEANS ADJUSTABLE TO
References Cited (Backward Citations)
GB784768A
Cited
US2243457A
Cited
US2243379A
Cited
US2315578A
Cited
US2303424A
Cited
US2344753A
Cited
US2338293A
Cited
US2346975A
Cited
DE888464C
Cited
US2394411A
Cited
US2449563A
Cited
US2663184A
Cited
US2748603A
Cited
US2851885A
Cited
GB760678A
Cited
US2892152A
Cited
US2983148A
Cited
US2924977A
Cited
US2975640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |