US3458723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Square wave generator
Assignee: HP Inc
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Filing: 1966-09-09
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Granted: 1969-07-29
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Expires: 1986-09-09
Abstract
No abstract record available.
Inventors
- 👤 Fred L Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
H; H03; H03K; H03K5/00; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/66; H03K17/665; H03K17/666; H03K17/667
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A SIGNAL GENERATOR HAVING AN OUTPUT AND COMPRISING: A PAIR OF UNIDIRECTIONAL VOLTAGE SUPPLIES OF OPPOSITE POLARITY; A SIGNAL-CONTROLLED REGULATOR SERIALLY CONNECTED TO EACH OF SAID SUPPLIES; FIRST SWITCHING MEANS CONNECTED TO EACH OF THE REGULATORS FOR SELECTIVELY CONNECTING A REGULATOR TO THE OUTPUT OF THE GENERATOR; A FIRST VOLTAGE DIVIDER AND AN AMPLIFIER FOR EACH OF SAID REGULATORS; MEANS INCLUDING THE FIRST VOLTAGE DIVIDER CONNECTED TO THE OUTPUT OF THE GENERATOR AND INCLUDING THE AMPLIFIER CONNECTED BETWEEN THE DIVIDER AND THE RESPECTIVE REGULATOR FOR APPLYING A CONTROL SIGNAL TO SUCH REGULATOR FOR MAINTAINING THE VOLTAGE AT THE OUTPUT OF THE GENERATOR SUBSTANTIALLY CONSTANT DURING THE TIME SAID FIRST SWITCHING MEANS CONNECTS SUCH REGULATOR TO THE OUTPUT OF THE GENERATOR; AND SECOND SWITCHING MEANS AND A SECOND VOLTAGE DIVIDER FOR EACH OF SAID REGULATORS, THE SECOND VOLTAGE DIVIDER AND SECOND SWITCHING MEANS BEING SERIALLY CONNECTED BETWEEN THE RESPECTIVE REGULATOR AND THE AMPLIFIER THEREFOR FOR CONTROLLING SUCH REGULATOR TO MAINTAIN ITS OUTPUT SUBSTANTIALLY CONSTANT DURING THE TIME THE OTHER REGULATOR IS CONNECTED TO THE OUPUT OF THE GENERATOR.
Claim 2
Dependent Claim
177 words
A SIGNAL GENERATOR HAVING AN OUTPUT AND COMPRISING: A PAIR OF UNIDIRECTIONAL VOLTAGE SUPPLIES OF OPPOSITE POLARITY; A SIGNAL-CONTROLLED REGULATOR SERIALLY CONNECTED TO EACH OF SAID SUPPLIES; FIRST SWITCHING MEANS CONNECTED TO EACH OF THE REGULATORS FOR SELECTIVELY CONNECTING A REGULATOR TO THE OUTPUT OF THE GENERATOR; A FIRST VOLTAGE DIVIDER AND AN AMPLIFIER FOR EACH OF SAID REGULATORS; MEANS INCLUDING THE FIRST VOLTAGE DIVIDER CONNECTED TO THE OUTPUT OF THE GENERATOR AND INCLUDING THE AMPLIFIER CONNECTED BETWEEN THE DIVIDER AND THE RESPECTIVE REGULATOR FOR APPLYING A CONTROL SIGNAL TO SUCH REGULATOR FOR MAINTAINING THE VOLTAGE AT THE OUTPUT OF THE GENERATOR SUBSTANTIALLY CONSTANT DURING THE TIME SAID FIRST SWITCHING MEANS CONNECTS SUCH REGULATOR TO THE OUTPUT OF THE GENERATOR; AND SECOND SWITCHING MEANS AND A SECOND VOLTAGE DIVIDER FOR EACH OF SAID REGULATORS, THE SECOND VOLTAGE DIVIDER AND SECOND SWITCHING MEANS BEING SERIALLY CONNECTED BETWEEN THE RESPECTIVE REGULATOR AND THE AMPLIFIER THEREFOR FOR CONTROLLING SUCH REGULATOR TO MAINTAIN ITS OUTPUT SUBSTANTIALLY CONSTANT DURING THE TIME THE OTHER REGULATOR IS CONNECTED TO THE OUPUT OF THE GENERATOR.
References Cited (Backward Citations)
US3359433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |