Patent US3721920A successfully refreshed from Google Patents.
US3721920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-excited composite capacitance and interlocking inductance oscillator
Assignee: Individual
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Filing: 1971-06-01
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Granted: 1973-03-20
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Expires: 1991-06-01
Abstract
Abstract A self-excited, self-tuning and self-loading generator in which the load electrode is an inherent part of the capacity and inductance of the generator tank circuit. The generator is automatically, instantly and steplessly self-tuning with respect to wide variations in load characteristics. A maximum power input to the load is maintained by the generator and this is in proportion to changes in the loss factor of the load. A composite or interlocked inductance is used for the load electrode and the tank circuit. Series coupling condensers are used in the load circuit and leads from these coupling condensers are crossed and their terminals are connected to the composite inductance thus interlocking the composite inductance with the load circuit. This is why I term the composite inductance an interlocked inductance.
Inventors
- 👤 J Mann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:37
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/18; H03B5/1817; H03B5/1835
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
428 words
A self-excited oscillator comprising: a. a pair of base plates parallely arranged in spaced relation and adapted to be oppositely charged and having an integral stator plate at each end, each stator plate forming a part of a condenser; b. a first pair of adjustable condenser plates positioned adjacent to the pair of stator plates disposed at the same ends of said base plates and forming a first pair of series variable condensers with said stator plates; c. a work receiving pair of electrodes, the adjustable plate of one of said series variable condensers being electrically connected to one of said pair of electrodes and the adjustable plate of the other series variable condensers being electrically connected to the other electrode to place said pair of electrodes in series with the two series variable condensers; d. a third adjustable condenser plate positioned adjacent to the stator plates disposed at the other ends of said base plates and forming a second pair of variable series condensers, said third adjustable condenser plate being movable for controlling the frequency of said oscillator; e. a pair of three element vacuum tubes, one for each base plate, the anode of one tube being electrically connected to one of said base plates and the anode of the other tube being electrically connected to the other base plate; f. an interlocked inductance having an inner elongated grid line inductance with one end of said grid line being electrically connected to the grid of one of said vacuum tubes and the other end of said grid line being electrically connected to the grid of the other tube; g. said interlocked inductance also having an outer cylindrical inductance that is concentric to and insulated from said inner grid line; h. a first pair of crossed inductances, one of which extends from the stator plate of one of said first pair of said series variable condensers to the end of said outer cylindrical inductance and the other of which extends from the stator plate of the other one of said first pair of said series variable condensers to the opposite end of said outer cylindrical inductance; and i. a second pair of crossed inductances, one of which extends from the stator plate of one of said second pair of said variable series condensers to an end of the outer cylindrical inductance and the other of the second pair of crossed inductances extending from the stator plate of the other one of said second pair of said variable series condensers to the opposite end of said outer cylindrical inductance.
Claim 2
Dependent Claim
428 words
A self-excited oscillator comprising: a. a pair of base plates parallely arranged in spaced relation and adapted to be oppositely charged and having an integral stator plate at each end, each stator plate forming a part of a condenser; b. a first pair of adjustable condenser plates positioned adjacent to the pair of stator plates disposed at the same ends of said base plates and forming a first pair of series variable condensers with said stator plates; c. a work receiving pair of electrodes, the adjustable plate of one of said series variable condensers being electrically connected to one of said pair of electrodes and the adjustable plate of the other series variable condensers being electrically connected to the other electrode to place said pair of electrodes in series with the two series variable condensers; d. a third adjustable condenser plate positioned adjacent to the stator plates disposed at the other ends of said base plates and forming a second pair of variable series condensers, said third adjustable condenser plate being movable for controlling the frequency of said oscillator; e. a pair of three element vacuum tubes, one for each base plate, the anode of one tube being electrically connected to one of said base plates and the anode of the other tube being electrically connected to the other base plate; f. an interlocked inductance having an inner elongated grid line inductance with one end of said grid line being electrically connected to the grid of one of said vacuum tubes and the other end of said grid line being electrically connected to the grid of the other tube; g. said interlocked inductance also having an outer cylindrical inductance that is concentric to and insulated from said inner grid line; h. a first pair of crossed inductances, one of which extends from the stator plate of one of said first pair of said series variable condensers to the end of said outer cylindrical inductance and the other of which extends from the stator plate of the other one of said first pair of said series variable condensers to the opposite end of said outer cylindrical inductance; and i. a second pair of crossed inductances, one of which extends from the stator plate of one of said second pair of said variable series condensers to an end of the outer cylindrical inductance and the other of the second pair of crossed inductances extending from the stator plate of the other one of said second pair of said variable series condensers to the opposite end of said outer cylindrical inductance.
Claim 3
Dependent Claim
98 words
The combination as set forth in claim 1, and in which a. said first pair of crossed inductances that connect said first pair of series variable condensers with said outer cylinder of said interlocked inductance are in electrical parallel with said second pair of crossed inductances that connect said second pair of variable series condensers with said outer cylinder of said interlocked inductance; b. whereby these two pairs of crossed inductances and said interlocked inductance are all in the same electronic phase with respect to the current displacement at the mid-portion of said elongated grid line inductance length.
Claim 4
Dependent Claim
63 words
The combination as set forth in claim 2 and in which a. said first pair of series variable condensers and said work receiving pair of electrodes form a series capacitance that parallels the capacitance created between said pair of base plates; and b. the capacitance of said second pair of variable series condensers parallels the capacitance created between said pair of base plates.
References Cited (Backward Citations)
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Cited
US2261152A
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US2252941A
Cited
US2294797A
Cited
US3119971A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |