Patent US2232271A successfully refreshed from Google Patents.
Patent US3237113A successfully refreshed from Google Patents.
US3237113A
Expired / Lapsed
US
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Periodic signal apparatus
Assignee: US Philips Corp
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Filing: 1959-03-09
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Granted: 1966-02-22
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Expires: 1979-03-09
Abstract
No abstract record available.
Inventors
- 👤 Klein Gerrit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:14
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/08; H03B5/10; G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/161; G06G7/20; G06G7/22; H03K; H03K4/00; H03K4/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
APPARATUS FOR PRODUCING A PERIODIC SIGNAL HAVING A GIVEN FREQUENCY AND A PREDETERMINED WAVEFORM, SAID APPARATUS COMPRISING A FIRST SOURCE OF SUBSTANTIAL SINUSOIDAL SIGNAL HAVING A PREDETERMINED FREQUENCY GREATER THAN SAID GIVEN FREQUENCY, A SECOND SOURCE OF ALTERNATING SIGNAL HAVING SAID GIVEN FREQUENCY, DIFFERENTIAL AMPLIFIER MEANS COMPRISING FIRST AND SECOND INPUT MEANS COUPLED TO SAID FIRST AND SECOND SOURCES, RESPECTIVELY, SAID DIFFERENTIAL AMPLIFIER MEANS FURTHER COMPRISING MEANS FOR COMPARING SAID FIRST AND SECOND SIGNALS, SAID COMPARING MEANS COMPRISING MEANS FOR PRODUCING A PULSEFORM SIGNAL AT INSTANTS WHEN THE AMPLITUDE OF ONE OF SAID SIGNALS EXCEEDS THE AMPLITUDE OF THE OTHER OF SAID SIGNALS, AND MEANS COUPLED TO SAID COMPARING MEANS FOR INTEGRATING SAID PULSEFROM SIGNAL, AND OUTPUT MEANS COUPLED TO SAID INTEGRATING MEANS FOR PROVIDING SAID PERIODIC SIGNAL.
Claim 2
Dependent Claim
128 words
APPARATUS FOR PRODUCING A PERIODIC SIGNAL HAVING A GIVEN FREQUENCY AND A PREDETERMINED WAVEFORM, SAID APPARATUS COMPRISING A FIRST SOURCE OF SUBSTANTIAL SINUSOIDAL SIGNAL HAVING A PREDETERMINED FREQUENCY GREATER THAN SAID GIVEN FREQUENCY, A SECOND SOURCE OF ALTERNATING SIGNAL HAVING SAID GIVEN FREQUENCY, DIFFERENTIAL AMPLIFIER MEANS COMPRISING FIRST AND SECOND INPUT MEANS COUPLED TO SAID FIRST AND SECOND SOURCES, RESPECTIVELY, SAID DIFFERENTIAL AMPLIFIER MEANS FURTHER COMPRISING MEANS FOR COMPARING SAID FIRST AND SECOND SIGNALS, SAID COMPARING MEANS COMPRISING MEANS FOR PRODUCING A PULSEFORM SIGNAL AT INSTANTS WHEN THE AMPLITUDE OF ONE OF SAID SIGNALS EXCEEDS THE AMPLITUDE OF THE OTHER OF SAID SIGNALS, AND MEANS COUPLED TO SAID COMPARING MEANS FOR INTEGRATING SAID PULSEFROM SIGNAL, AND OUTPUT MEANS COUPLED TO SAID INTEGRATING MEANS FOR PROVIDING SAID PERIODIC SIGNAL.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |