Patent US2650335A successfully refreshed from Google Patents.
Patent US3786334A successfully refreshed from Google Patents.
US3786334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic pulse compression radio-frequency generator apparatus
Assignee: Megapulse Inc
•
Filing: 1971-08-12
•
Granted: 1974-01-15
•
Expires: 1991-08-12
Abstract
Abstract Magnetic pulse compression radio-frequency generators involving preferably SCR-controlled sequential inverters connected with magnetic pulse compression circuits feeding a common output load.
Inventors
- 👤 P Johannessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:37
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/523
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
Magnetic pulse compression radio-frequency generator apparatus having, in combination, sequential inverter means having a plurality of energy storage and discharge circuits disposed at a plurality of locations, each such circuit being provided with a magnetic pulse compression circuit, means for connecting all of the plurality of magnetic pulse compression circuits to a common load, and means comprising gated trigger means connected in each energy storage and discharge circuit for controlling the impedance of the corresponding magnetic pulse compression circuit in order to generate sequential compressed pulses in the plurality of magnetic pulse compression circuits for application to the said common load, the storage circuits of said sequential inverter means each comprising cascaded first and second resonant charging circuits each provided with said gated trigger means for controlling the transfer of the charge stored therein, said trigger means of said second resonant charging circuit having DC power supply means for reverse biasing the last-mentioned trigger means to maintain the same non-conductive for a period of time after it has been rendered conductive.
Claim 2
Dependent Claim
171 words
Magnetic pulse compression radio-frequency generator apparatus having, in combination, sequential inverter means having a plurality of energy storage and discharge circuits disposed at a plurality of locations, each such circuit being provided with a magnetic pulse compression circuit, means for connecting all of the plurality of magnetic pulse compression circuits to a common load, and means comprising gated trigger means connected in each energy storage and discharge circuit for controlling the impedance of the corresponding magnetic pulse compression circuit in order to generate sequential compressed pulses in the plurality of magnetic pulse compression circuits for application to the said common load, the storage circuits of said sequential inverter means each comprising cascaded first and second resonant charging circuits each provided with said gated trigger means for controlling the transfer of the charge stored therein, said trigger means of said second resonant charging circuit having DC power supply means for reverse biasing the last-mentioned trigger means to maintain the same non-conductive for a period of time after it has been rendered conductive.
Claim 3
Dependent Claim
35 words
Apparatus as claimed in claim 1 and in which each of the second charging circuits is connected with a corresponding one of the magnetic pulse compression circuits comprising a saturable reactor, diode and output transformer.
Claim 4
Dependent Claim
119 words
Apparatus as claimed in claim 2 and in which means is provided for first triggering the trigger means of the said first resonant charging circuit of each energy storage circuit to effect charging energy storage therein for a period Tau 1, then triggering the trigger means of the said second charging circuit for further storage during a period Tau 2, means operable during the period Tau 2 for reducing the impedance of the magnetic pulse compression circuit to a low value, and means for therefor discharging the further stored energy from the second charging circuit through the low impedance magnetic pulse compression circuit to said common load in a period Tau 3 shorter than Tau 2 and Tau 1.
Claim 5
Dependent Claim
15 words
Apparatus as claimed in claim 3 and in which said trigger means comprises SCR devices.
Claim 6
Dependent Claim
73 words
Apparatus as claimed in claim 1 and in which the first resonant charging circuit comprises an inductance, a semiconductor controlled rectifier, and a capacitance in series across a source of energy, the second resonant charging circuit comprises a semiconductor controlled rectifier, an inductance, and a capacitance in series across the first-mentioned capacitance, and each of said magnetic pulse compression circuits comprises a saturable reactor in series with a rectifier across the second-mentioned capacitance.
Claim 7
Dependent Claim
63 words
Apparatus as claimed in claim 5 and in which said DC power supply means comprises means connected to said capacitances for charging said caPacitances to voltages which are of polarity opposite to the polarity of the voltage to which the first-mentioned capacitance is charged by said source and which are of relative magnitude to apply a reverse voltage to the last-mentioned trigger means.
Claim 8
Dependent Claim
74 words
Apparatus as claimed in claim 1 and in which each of said magnetic pulse compression circuits comprises a saturable reactor in series with a rectifier and said controlling means comprises means for reducing the series impedance of said reactor and said rectifier to a low value for discharging the stored energy through the pulse compression circuit to said load and for thereafter back-biasing said rectifier to isolate the pulse compression circuit from the load.
References Cited (Backward Citations)
US2869004A
Cited
US3193693A
Cited
US3211915A
Cited
US3323076A
Cited
US3290581A
Cited
GB1058839A
Cited
GB1136376A
Cited
US3422341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |