Patent US3283569A successfully refreshed from Google Patents.
US3283569A
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Method and apparatus for indicating performance characteristics of reciprocating piston machines
Assignee: Southern Gas Association
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Filing: 1964-12-21
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Granted: 1966-11-08
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 James D King
- 👤 Carl E Edlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:24
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/24; G01L3/245; G01L23/00; G01L23/08; G01L23/20; G01M; G01M15/00; G01M15/04; G01M15/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
APPARATUS FOR MEASURING THE INDICATED POWER OF A PISTON RECIPROCATING IN A CYLINDER, COMPRISING MEANS FOR PRODUCING A FIRST ELECTRICAL SIGNAL PROPORTIONAL TO THE PRODUCT OF THE FUNDAMENTAL OF THE PISTON MOTION AND THE SPEED OF THE PISTON AND A SECOND ELECTRICAL SIGNAL PROPORTIONAL TO THE PRODUCT OF THE SECOND HARMONIC OF THE PISTON MOTION AND THE SPEED OF THE PISTON; MEANS FOR SUMMING SAID FIRST AND SECOND SIGNALS TO PRODUCE A THIRD ELECTRICAL SIGNAL PROPORTIONAL TO THE FIRST DERIVATIVE OF THE INSTANTANEOUS VOLUME OF THE CYLINDER; MEANS FOR PRODUCING A FOURTH ELECTRICAL SIGNAL PROPORTIONAL TO THE INSTANTANEOUS PRESSURE IN THE CYLINDER; MEANS FOR MULTIPLYING THE THIRD SIGNAL BY THE FOURTH SIGNAL TO PRODUCE A FIFTH SIGNAL; AND MEANS FOR INTEGRATING THE FIFTH SIGNAL TO PRODUCE A SIXTH ELECTRICAL SIGNAL PROPORTIONAL TO THE INDICATED POWER OF THE PISTON.
Claim 2
Dependent Claim
138 words
APPARATUS FOR MEASURING THE INDICATED POWER OF A PISTON RECIPROCATING IN A CYLINDER, COMPRISING MEANS FOR PRODUCING A FIRST ELECTRICAL SIGNAL PROPORTIONAL TO THE PRODUCT OF THE FUNDAMENTAL OF THE PISTON MOTION AND THE SPEED OF THE PISTON AND A SECOND ELECTRICAL SIGNAL PROPORTIONAL TO THE PRODUCT OF THE SECOND HARMONIC OF THE PISTON MOTION AND THE SPEED OF THE PISTON; MEANS FOR SUMMING SAID FIRST AND SECOND SIGNALS TO PRODUCE A THIRD ELECTRICAL SIGNAL PROPORTIONAL TO THE FIRST DERIVATIVE OF THE INSTANTANEOUS VOLUME OF THE CYLINDER; MEANS FOR PRODUCING A FOURTH ELECTRICAL SIGNAL PROPORTIONAL TO THE INSTANTANEOUS PRESSURE IN THE CYLINDER; MEANS FOR MULTIPLYING THE THIRD SIGNAL BY THE FOURTH SIGNAL TO PRODUCE A FIFTH SIGNAL; AND MEANS FOR INTEGRATING THE FIFTH SIGNAL TO PRODUCE A SIXTH ELECTRICAL SIGNAL PROPORTIONAL TO THE INDICATED POWER OF THE PISTON.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |