US3221266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear sweep frequency generator
Assignee: HP Inc
•
Filing: 1964-03-03
•
Granted: 1965-11-30
•
Expires: 1984-03-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Stephen Vitkovits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:40
CPC Classifications
H; H03; H03B; H03B23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
SIGNALLING APPARATUS COMPRISING: A FIRST SOURCE OF SIGNAL HAVING A FREQUENCY RELATED TO A VOLTAGE APPLIED TO SAID SOURCE; A SOURCE OF SWEEP VOLTAGE CONTINUOUSLY COUPLED TO SAID FIRST SOURCE FOR VARYING THE FREQUENCY OF THE SIGNAL FROM SAID FIRST SOURCE; A SECOND SOURCE OF SIGNAL HAVING A PLURALITY OF EVENLYSPACED FREQUENCY COMPONENTS WITHIN ITS FREQUENCY SPECTRUM; MIXING MEANS COUPLED TO SAID FIRST AND SECOND SOURCES FOR MIXING SIGNALS FROM SAID SOURCES THEREBY TO PRODUCE RECURRING BEAT FREQUENCY SIGNALS; CORRECTING MEANS RESPONSIVE TO THE REPETITION RATE OF ONLY ONE OF SAID BEAT FREQUENCY SIGNALS FOR GENERATING A CORRECTION VOLTAGE SIGNAL; AND ADDITIONAL MEANS COUPLED TO SAID FIRST SOURCE AND TO SAID CORRECTING MEANS FOR MODIFYING SAID SWEEP VOLTAGE IN ACCORDANCE WITH SAID CORRECTION VOLTAGE, WHEREBY, THE RATE OF CHANGE OF FREQUENCY OF THE SIGNAL FROM SAID FIRST SOURCE IS MAINTAINED SUBSTANTIALLY CONSTANT WITH TIME.
Claim 2
Dependent Claim
144 words
SIGNALLING APPARATUS COMPRISING: A FIRST SOURCE OF SIGNAL HAVING A FREQUENCY RELATED TO A VOLTAGE APPLIED TO SAID SOURCE; A SOURCE OF SWEEP VOLTAGE CONTINUOUSLY COUPLED TO SAID FIRST SOURCE FOR VARYING THE FREQUENCY OF THE SIGNAL FROM SAID FIRST SOURCE; A SECOND SOURCE OF SIGNAL HAVING A PLURALITY OF EVENLYSPACED FREQUENCY COMPONENTS WITHIN ITS FREQUENCY SPECTRUM; MIXING MEANS COUPLED TO SAID FIRST AND SECOND SOURCES FOR MIXING SIGNALS FROM SAID SOURCES THEREBY TO PRODUCE RECURRING BEAT FREQUENCY SIGNALS; CORRECTING MEANS RESPONSIVE TO THE REPETITION RATE OF ONLY ONE OF SAID BEAT FREQUENCY SIGNALS FOR GENERATING A CORRECTION VOLTAGE SIGNAL; AND ADDITIONAL MEANS COUPLED TO SAID FIRST SOURCE AND TO SAID CORRECTING MEANS FOR MODIFYING SAID SWEEP VOLTAGE IN ACCORDANCE WITH SAID CORRECTION VOLTAGE, WHEREBY, THE RATE OF CHANGE OF FREQUENCY OF THE SIGNAL FROM SAID FIRST SOURCE IS MAINTAINED SUBSTANTIALLY CONSTANT WITH TIME.
References Cited (Backward Citations)
US3076151A
Cited
US3155919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |