Patent US3340951A successfully refreshed from Google Patents.
US3340951A
Expired / Lapsed
US
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Speed control system
Assignee: General Electric Co
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Filing: 1964-04-24
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Granted: 1967-09-12
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Expires: 1984-04-24
Abstract
No abstract record available.
Inventors
- 👤 Vitt Hillert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:10
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/20; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A SYSTEM FOR CONTROLLING THE SPEED OF AN ELEMENT, THE COMBINATION COMPRISING: MEANS FOR VARYING THE SPEED OF SAID ELEMENT; MEANS FOR DEVELOPING ELECTRICAL SPEED INDICATING PULSES HAVING A WIDTH INVERSELY RELATED TO THE ACTUAL SPEED OF SAID ELEMENT; MEANS RESPONSIVE TO THE APPLICATION OF A SPEED INDICATING PULSE FOR PRODUCING A SPEED REFERENCE PULSE STARTING COINCIDENT WITH SAID SPEED INDICATING PULSE AND HAVING A FIXED WIDTH REPRESENTING A DESIRED SPEED; MEANS FOR COMPARING THE WIDTHS OF SAID SPEED INDICATING AND SPEED REFERENCE PULSE INCLUDING FIRST MEANS TO PROVED A FIRST ERROR PULSE INDICATIVE OF AN ACTUAL SPEED GREATER THAN SAID DESIRED SPEED AND SECOND MEANS TO PROVIDE A SECOND ERROR PULSE INDICATIVE OF AN ACTUAL SPEED LESS THAN SAID DESIRED SPEED; MEANS RESPONSIVE TO SAID ERROR PULSES FOR PRODUCING A CONTROL SIGNAL; AND MEANS APPLYING SAID CONTROL SIGNAL TO SAID MEANS FOR VARYING THE SPEED OF SAID ELEMENT.
Claim 2
Dependent Claim
150 words
IN A SYSTEM FOR CONTROLLING THE SPEED OF AN ELEMENT, THE COMBINATION COMPRISING: MEANS FOR VARYING THE SPEED OF SAID ELEMENT; MEANS FOR DEVELOPING ELECTRICAL SPEED INDICATING PULSES HAVING A WIDTH INVERSELY RELATED TO THE ACTUAL SPEED OF SAID ELEMENT; MEANS RESPONSIVE TO THE APPLICATION OF A SPEED INDICATING PULSE FOR PRODUCING A SPEED REFERENCE PULSE STARTING COINCIDENT WITH SAID SPEED INDICATING PULSE AND HAVING A FIXED WIDTH REPRESENTING A DESIRED SPEED; MEANS FOR COMPARING THE WIDTHS OF SAID SPEED INDICATING AND SPEED REFERENCE PULSE INCLUDING FIRST MEANS TO PROVED A FIRST ERROR PULSE INDICATIVE OF AN ACTUAL SPEED GREATER THAN SAID DESIRED SPEED AND SECOND MEANS TO PROVIDE A SECOND ERROR PULSE INDICATIVE OF AN ACTUAL SPEED LESS THAN SAID DESIRED SPEED; MEANS RESPONSIVE TO SAID ERROR PULSES FOR PRODUCING A CONTROL SIGNAL; AND MEANS APPLYING SAID CONTROL SIGNAL TO SAID MEANS FOR VARYING THE SPEED OF SAID ELEMENT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |