Patent US3302138A successfully refreshed from Google Patents.
US3302138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage controlled crystal oscillator
Assignee: Individual
•
Filing: 1965-08-18
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Granted: 1967-01-31
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Expires: 1985-08-18
Abstract
No abstract record available.
Inventors
- 👤 Harry C Brown
- 👤 James V Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:11
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/36; H03B5/366; H03B5/368
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A VOLTAGE CONTROLLED CRYSTAL OSCILLATOR COMPRISING A PIEZOELECTRIC CRYSTAL; A VOLTAGE RESPONSIVE VARIABLE CAPACITANCE CONNECTED IN SERIES WITH THE CRYSTAL; A TERMINAL FOR RECEIVING A CONTROL VOLTAGE; A FIRST FIXED CAPACITANCE CONNECTED IN PARALLEL WITH THE CRYSTAL; A SECOND FIXED CAPACITANCE CONNECTED IN PARALLEL WITH THE VOLTAGE RESPONSIVE VARIABLE CAPACITANCE; A THIRD FIXED CAPACITANCE CONNECTED IN SERIES WITH THE VOLTAGE RESPONSIVE VARIABLE CAPACITANCE, SAID SECOND AND THIRD FIXED CAPACITANCES BEING OF EQUAL VALUE; AND MEANS CONNECTING THE TERMINAL WITH THE THIRD FIXED CAPACITANCE WHEREBY A CONTROL VOLTAGE APPLIED TO THE TERMINAL CAUSES THE VOLTAGE RESPONSIVE VARIABLE CAPACITANCE TO VARY AND THEREBY VARY THE FREQUENCY OF THE CRYSTAL THROUGHOUT ITS TUNING RANGE.
Claim 2
Dependent Claim
111 words
A VOLTAGE CONTROLLED CRYSTAL OSCILLATOR COMPRISING A PIEZOELECTRIC CRYSTAL; A VOLTAGE RESPONSIVE VARIABLE CAPACITANCE CONNECTED IN SERIES WITH THE CRYSTAL; A TERMINAL FOR RECEIVING A CONTROL VOLTAGE; A FIRST FIXED CAPACITANCE CONNECTED IN PARALLEL WITH THE CRYSTAL; A SECOND FIXED CAPACITANCE CONNECTED IN PARALLEL WITH THE VOLTAGE RESPONSIVE VARIABLE CAPACITANCE; A THIRD FIXED CAPACITANCE CONNECTED IN SERIES WITH THE VOLTAGE RESPONSIVE VARIABLE CAPACITANCE, SAID SECOND AND THIRD FIXED CAPACITANCES BEING OF EQUAL VALUE; AND MEANS CONNECTING THE TERMINAL WITH THE THIRD FIXED CAPACITANCE WHEREBY A CONTROL VOLTAGE APPLIED TO THE TERMINAL CAUSES THE VOLTAGE RESPONSIVE VARIABLE CAPACITANCE TO VARY AND THEREBY VARY THE FREQUENCY OF THE CRYSTAL THROUGHOUT ITS TUNING RANGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |