Patent US3154753A successfully refreshed from Google Patents.
US3154753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal-stabilized oscillator of which the frequency can be modulated
Assignee: US Philips Corp
•
Filing: 1960-11-22
•
Granted: 1964-10-27
•
Expires: 1980-11-22
Abstract
No abstract record available.
Inventors
- 👤 Rusy Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:01
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/22; H03C3/222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A FREQUENCY MODULATED CRYSTAL STABILIZED OSCILLATOR COMPRISING NEGATIVE RESISTANCE MEANS, AND A FRQUENCY DETERMINING CIRCUIT, SAID FREQUENCY DETERMINING CIRCUIT COMPRISING FIRST AND SECOND PARALLEL RESONANT CIRCUITS, MEANS COUPLING SAID FIRST RESONANT CIRCUIT TO SAID NEGATIVE RESISTANCE MEANS, MEANS FOR COUPLING TOGETHER SAID FIRST AND SECOND PARALLEL RESONANT CIRCUITS WITH A COUPLING FACTOR NO GREATER THAN CRITICAL COUPLING, RESISTANCE DAMPING MEANS CONNECTED IN PARALLEL WITH SAID SECOND RESONANT CIRCUIT, A SERIES RESONANT CRYSTAL CONNECTED IN PARALLEL WITH SAID SECOND RESONANT CIRCUIT, AND MEANS FOR VARYING THE NATURAL FREQUENCY OF SAID FIRST PARALLEL RESONANT CIRCUIT.
Claim 2
Dependent Claim
93 words
A FREQUENCY MODULATED CRYSTAL STABILIZED OSCILLATOR COMPRISING NEGATIVE RESISTANCE MEANS, AND A FRQUENCY DETERMINING CIRCUIT, SAID FREQUENCY DETERMINING CIRCUIT COMPRISING FIRST AND SECOND PARALLEL RESONANT CIRCUITS, MEANS COUPLING SAID FIRST RESONANT CIRCUIT TO SAID NEGATIVE RESISTANCE MEANS, MEANS FOR COUPLING TOGETHER SAID FIRST AND SECOND PARALLEL RESONANT CIRCUITS WITH A COUPLING FACTOR NO GREATER THAN CRITICAL COUPLING, RESISTANCE DAMPING MEANS CONNECTED IN PARALLEL WITH SAID SECOND RESONANT CIRCUIT, A SERIES RESONANT CRYSTAL CONNECTED IN PARALLEL WITH SAID SECOND RESONANT CIRCUIT, AND MEANS FOR VARYING THE NATURAL FREQUENCY OF SAID FIRST PARALLEL RESONANT CIRCUIT.
References Cited (Backward Citations)
US2906969A
Cited
US2925561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |