US3334285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor speed control for supply system
Assignee: Individual
•
Filing: 1965-05-03
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Granted: 1967-08-01
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Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Blake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:35
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2066; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A SPEED CONTROL SYSTEM FOR A MOTOR HAVING AN ARMATURE COMPRISING VOLTAGE SUPPLY REGULATING MEANS FOR THE ARMATURE; INDEXING MEANS DISPLACEABLE IN ACCORDANCE WITH REQUIRED SPEED INCREASES AND DECREASES; MEANS RESPONSIVE TO THE POSITION OF THE INDEXING MEANS FOR DEVELOPING AN ELECTRICAL SPEED CONTROL SIGNAL; SAID RESPONSIVE MEANS COMPRISING MEANS FOR AMPLIFYING THE CONTROL SIGNAL AND ESTABLISHING A ZERO REFERENCE THEREFOR; MEANS FOR CONVERTING THE AMPLIFIED SIGNAL TO A DC SIGNAL; AN RC STORAGE CIRCUIT FOR THE CONVERTED SIGNAL; MEANS RESPONSIVE TO A PORTION OF THE APPLIED ARMATURE VOLTAGE TO PROVIDE A FEEDBACK SIGNAL; MEANS FOR COMPARING THE AMPLIFIED AND STORED CONTROL SIGNAL AND THE FEED-BACK SIGNAL TO DEVELOP A DIFFERENCE SIGNAL; AND MEANS FOR CONTROLLING THE VOLTAGE REGULATING MEANS BY SAID DIFFERENCE SIGNAL.
Claim 2
Dependent Claim
124 words
A SPEED CONTROL SYSTEM FOR A MOTOR HAVING AN ARMATURE COMPRISING VOLTAGE SUPPLY REGULATING MEANS FOR THE ARMATURE; INDEXING MEANS DISPLACEABLE IN ACCORDANCE WITH REQUIRED SPEED INCREASES AND DECREASES; MEANS RESPONSIVE TO THE POSITION OF THE INDEXING MEANS FOR DEVELOPING AN ELECTRICAL SPEED CONTROL SIGNAL; SAID RESPONSIVE MEANS COMPRISING MEANS FOR AMPLIFYING THE CONTROL SIGNAL AND ESTABLISHING A ZERO REFERENCE THEREFOR; MEANS FOR CONVERTING THE AMPLIFIED SIGNAL TO A DC SIGNAL; AN RC STORAGE CIRCUIT FOR THE CONVERTED SIGNAL; MEANS RESPONSIVE TO A PORTION OF THE APPLIED ARMATURE VOLTAGE TO PROVIDE A FEEDBACK SIGNAL; MEANS FOR COMPARING THE AMPLIFIED AND STORED CONTROL SIGNAL AND THE FEED-BACK SIGNAL TO DEVELOP A DIFFERENCE SIGNAL; AND MEANS FOR CONTROLLING THE VOLTAGE REGULATING MEANS BY SAID DIFFERENCE SIGNAL.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |