US3249888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beat frequency signal generator
Assignee: Wandel and Golterman GmbH and Co
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Filing: 1964-04-30
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Granted: 1966-05-03
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Expires: 1984-04-30
Abstract
No abstract record available.
Inventors
- 👤 Hoffmann Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:09
CPC Classifications
H; H03; H03B; H03B21/00; H03B21/01; H03B21/02; H03B21/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN A SIGNAL GENERATOR COMPRISING A FIRST GENERATOR, SAID FIRST GENERATOR SUPPLYING A CONSTANT FREQUENCY, A SECOND GENERATOR, SAID SECOND GENERATOR BEING TUNABLE IN A WIDE FREQUENCY RANGE, FIRST MIXING MEANS, AND FIRST MIXING MEANS FORMING A DIFFERENCE FREQUENCY FROM THE FREQUENCY OF THE FIRST GENERATOR AND THE FREQUENCY OF THE SECOND GENERATOR MEANS, THE COMBINATION COMPRISING A PLURALITY OF MIXING MEANS, THE COMBINATION COMPRISING A PLURALITY OF FREQUENCY DIVIDERS WHEREIN THE FREQUENCY OF THE FIRST GENERATOR AND THE FREQUENCY OF THE SECOND GENERATOR ARE DIVIDED, SECOND MIXING MEANS BEING CONNECTED TO SAID FREQUENCY DIVIDERS, AND SECOND LOW-PASS FILTERS BEING CONNECTED TO SAID SECOND MIXING MEANS, SAID SECOND MIXING MEANS FORMING A DIFFERENCE FREQUENCIES OF SAID DIVIDED FREQUENCIES AND APPLYING SAID DIFFERENCE FREQUENCIES TO SAID SECOND LOWPASS FILTERS, WHEREBY ONE OF SAID DIFFERENCE FREQUENCIES IS EMPLOYED AS SIGNAL FREQUENCY.
Claim 2
Dependent Claim
139 words
IN A SIGNAL GENERATOR COMPRISING A FIRST GENERATOR, SAID FIRST GENERATOR SUPPLYING A CONSTANT FREQUENCY, A SECOND GENERATOR, SAID SECOND GENERATOR BEING TUNABLE IN A WIDE FREQUENCY RANGE, FIRST MIXING MEANS, AND FIRST MIXING MEANS FORMING A DIFFERENCE FREQUENCY FROM THE FREQUENCY OF THE FIRST GENERATOR AND THE FREQUENCY OF THE SECOND GENERATOR MEANS, THE COMBINATION COMPRISING A PLURALITY OF MIXING MEANS, THE COMBINATION COMPRISING A PLURALITY OF FREQUENCY DIVIDERS WHEREIN THE FREQUENCY OF THE FIRST GENERATOR AND THE FREQUENCY OF THE SECOND GENERATOR ARE DIVIDED, SECOND MIXING MEANS BEING CONNECTED TO SAID FREQUENCY DIVIDERS, AND SECOND LOW-PASS FILTERS BEING CONNECTED TO SAID SECOND MIXING MEANS, SAID SECOND MIXING MEANS FORMING A DIFFERENCE FREQUENCIES OF SAID DIVIDED FREQUENCIES AND APPLYING SAID DIFFERENCE FREQUENCIES TO SAID SECOND LOWPASS FILTERS, WHEREBY ONE OF SAID DIFFERENCE FREQUENCIES IS EMPLOYED AS SIGNAL FREQUENCY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |