US4228539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency transmitter
Assignee: Valsala Oy
•
Filing: 1978-12-28
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Granted: 1980-10-14
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Expires: 1998-12-28
Abstract
Abstract The components of a transistor oscillator are mounted on an end cap rotatably mounted on the outer tube of a cavity resonator which stabilizes the oscillator. The intensity with which a high frequency is applied to the cavity resonator is adjustable by rotation of the end cap.
Inventors
- 👤 Reijo Hamalainen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/04; H03; H03B; H03B5/00; H03B5/18; H03B5/1805; H03B2201/00; H03B2201/01; H03B2201/011; H03B2201/014; H03B2201/015
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A high frequency transmitter comprising a cavity resonator having an outer tube having spaced opposite ends, a coaxial inner tube spaced from and surrounded by the outer tube and an end cap coaxially rotatably mounted on said outer tube at one end thereof; and a transistor oscillator stabilized by the cavity resonator and having components mounted on the end cap of said resonator whereby the intensity with which a high frequency is applied to said resonator is adjustable by rotation of said end cap.
Claim 2
Dependent Claim
84 words
A high frequency transmitter comprising a cavity resonator having an outer tube having spaced opposite ends, a coaxial inner tube spaced from and surrounded by the outer tube and an end cap coaxially rotatably mounted on said outer tube at one end thereof; and a transistor oscillator stabilized by the cavity resonator and having components mounted on the end cap of said resonator whereby the intensity with which a high frequency is applied to said resonator is adjustable by rotation of said end cap.
Claim 3
Dependent Claim
34 words
A high frequency transmitter as claimed in claim 1, wherein said end cap of said resonator has a peripheral edge abutting said outer tube of said resonator and fits tightly on said outer tube.
Claim 4
Dependent Claim
50 words
A high frequency transmitter as claimed in claim 1, wherein said inner tube of said resonator has an end adjacent said end cap which is asymmetrical relative to the axis of said outer tube thereby facilitating adjustability of the intensity with which a high frequency is applied to said resonator.
Claim 5
Dependent Claim
53 words
A high frequency transmitter as claimed in claim 1, wherein said oscillator includes a variable capacitor for adjusting the vibration frequency of said oscillator, said variable capacitor comprising an adjustable screw inserted in said inner tube of said resonator at an end of said inner tube in the area of said end cap.
Claim 6
Dependent Claim
29 words
A high frequency transmitter as claimed in claim 3, wherein the high frequency is applied principally via stray reactance between said end of said inner tube and said oscillator.
Claim 7
Dependent Claim
18 words
A high frequency transmitter as claimed in claim 3, wherein said end of said inner tube is chamfered.
Claim 8
Dependent Claim
21 words
A high frequency transmitter as claimed in claim 3, wherein said end of said inner tube has a bore formed therethrough.
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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |