US3090929A
Expired / Lapsed
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Controller circuitry with pulse width modulator
Assignee: Westinghouse Electric Corp
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Filing: 1959-12-18
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Granted: 1963-05-21
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Expires: 1979-12-18
Abstract
No abstract record available.
Inventors
- 👤 Francis T Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:10
CPC Classifications
G; G05; G05B; G05B5/00; G05B5/01; H; H03; H03K; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
CONTROL CIRCUITRY COMPRISING A PULSE WIDTH MODULATOR INCLUDING INPUT MEANS AND HAVING AN OUTPUT OF FIXED FREQUENCY AND MINIMUM PULSE WIDTH, FEEDBACK AMPLIFYING MEANS FOR AMPLIFYING THE PULSED PORTION OF SAID OUTPUT, SAID AMPLIFYING MEANS HAVING RESPECTIVE INPUT AND OUTPUT CIRCUITS, A COUPLING CIRCUIT CONNECTING THE MODULATOR OUTPUT TO THE INPUT CIRCUIT OF THE AMPLIFYING MEANS FOR PASSING THE PULSED PORTION OF MODULATOR OUTPUT AND REJECT-
Claim 2
Dependent Claim
66 words
CONTROL CIRCUITRY COMPRISING A PULSE WIDTH MODULATOR INCLUDING INPUT MEANS AND HAVING AN OUTPUT OF FIXED FREQUENCY AND MINIMUM PULSE WIDTH, FEEDBACK AMPLIFYING MEANS FOR AMPLIFYING THE PULSED PORTION OF SAID OUTPUT, SAID AMPLIFYING MEANS HAVING RESPECTIVE INPUT AND OUTPUT CIRCUITS, A COUPLING CIRCUIT CONNECTING THE MODULATOR OUTPUT TO THE INPUT CIRCUIT OF THE AMPLIFYING MEANS FOR PASSING THE PULSED PORTION OF MODULATOR OUTPUT AND REJECT-
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |