Patent US3210647A successfully refreshed from Google Patents.
US3210647A
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Current regulating circuits employing light sensitive means and pulse width modulation control
Assignee: International Computers and Tabulators Ltd
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Filing: 1962-03-13
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Granted: 1965-10-05
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Expires: 1982-03-13
Abstract
No abstract record available.
Inventors
- 👤 Dyke John Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:31
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/04; H05B39/041; H05B39/042; G; G05; G05F; G05F1/00; G05F1/10; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A CURRENT REGULATING ARRANGEMENT INCLUDING A SOURCE OF UNIDIRECTIONAL ELECTRICAL CURRENT CONTAINING A RIPPLE FREQUENCY COMPONENT; A LIGHT SOURCE ENERGIZED BY SAID ELECTRICAL CURRENT TO PRODUCE A LIGHT OUTPUT HAVING A RIPPLE COMPONENT OF SIMILAR FREQUENCY; MEANS FOR EXAMINING THE LIGHT OUTPUT TO PRODUCE A RESULTANT ELECTRICAL SIGNAL REPRESENTATIVE OF THE INTENSITY OF SAID LIGHT OUTPUT INCLUDING SAID RIPPLE COMPONENT; A REFERENCE SIGNAL SOURCE; SIGNAL COMBINING MEANS RESPONSIVE TO SAID RESULTANT SIGNAL AND TO SAID REFERENCE SIGNAL TO PRODUCE A TRAIN OF WIDTHMODULATED CONTROL PULSES AT SAID RIPPLE FREQUENCY; SAID SIGNAL COMBINATING MEANS BEING EFFECTIVE TO MODIFY THE WIDTH OF SAID CONTROL PULSES IN DEPENDENCE UPON VARIATIONS IN THE MEANS INTENSITY OF SAID LIGHT OUTPUT; AND CURRENT CONTROL MEANS CONNECTED TO SIGNAL COMBINING MEANS, THE UNDIRECTIONAL CURRENT SOURCE AND TO THE LIGHT SOURCE, SAID CURRENT CONTROL MEANS HAVING AN IMPEDANCE SWITCHABLE BETWEEN A FIRST AND A SECOND VLAUE IN RESPONSE TO SAID CONTROL PULSES TO REGULATE THE MEANS CURRENT FLOWING IN THE LIGHT SOURCE IN ACCORDANCE WITH VARIATIONS IN SAID MEANS INTENSITY OF SAID LIGHT OUTPUT.
Claim 2
Dependent Claim
176 words
A CURRENT REGULATING ARRANGEMENT INCLUDING A SOURCE OF UNIDIRECTIONAL ELECTRICAL CURRENT CONTAINING A RIPPLE FREQUENCY COMPONENT; A LIGHT SOURCE ENERGIZED BY SAID ELECTRICAL CURRENT TO PRODUCE A LIGHT OUTPUT HAVING A RIPPLE COMPONENT OF SIMILAR FREQUENCY; MEANS FOR EXAMINING THE LIGHT OUTPUT TO PRODUCE A RESULTANT ELECTRICAL SIGNAL REPRESENTATIVE OF THE INTENSITY OF SAID LIGHT OUTPUT INCLUDING SAID RIPPLE COMPONENT; A REFERENCE SIGNAL SOURCE; SIGNAL COMBINING MEANS RESPONSIVE TO SAID RESULTANT SIGNAL AND TO SAID REFERENCE SIGNAL TO PRODUCE A TRAIN OF WIDTHMODULATED CONTROL PULSES AT SAID RIPPLE FREQUENCY; SAID SIGNAL COMBINATING MEANS BEING EFFECTIVE TO MODIFY THE WIDTH OF SAID CONTROL PULSES IN DEPENDENCE UPON VARIATIONS IN THE MEANS INTENSITY OF SAID LIGHT OUTPUT; AND CURRENT CONTROL MEANS CONNECTED TO SIGNAL COMBINING MEANS, THE UNDIRECTIONAL CURRENT SOURCE AND TO THE LIGHT SOURCE, SAID CURRENT CONTROL MEANS HAVING AN IMPEDANCE SWITCHABLE BETWEEN A FIRST AND A SECOND VLAUE IN RESPONSE TO SAID CONTROL PULSES TO REGULATE THE MEANS CURRENT FLOWING IN THE LIGHT SOURCE IN ACCORDANCE WITH VARIATIONS IN SAID MEANS INTENSITY OF SAID LIGHT OUTPUT.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |