US3845322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse generator
Assignee: Physics International Co
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Filing: 1972-07-03
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Granted: 1974-10-29
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Expires: 1992-07-03
Abstract
Abstract A Marx type electrical pulse generator is provided in which the individual capacitors which form the Marx stages are isolated by appropriately sized inductors. Beginning from zero current and voltage conditions, a source of direct current is connected to one end of the circuit and charges the inductors to the required energy levels in times of the order of milliseconds. A rapid acting switch connected to the other end of the circuit is caused to open when the inductors are charged, thus causing the energy stored in the inductors to be rapidly and nearly completely transferred to the Marx stage capacitors. Energy transfer time is of the order of hundreds of microseconds. The circuit extends capacitor life by minimizing capacitor electrification time. Additional inductances are provided to protect the source of direct current from transient currents and voltages normally produced by operation of the circuit.
Inventors
- 👤 H Aslin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:06
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/537
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
75 words
A pulse generator comprising a Marx generator network comprising a plurality of series and parallel connected inductances and capacitances having a power supply end and a switch end, a supply of voltage and current connected to said power supply end, means for initiating a cancellation traveling wave through said network beginning at said switch end and ending at said power supply end to charge said capacitors, and means for discharging said capacitors through a load.
Claim 2
Dependent Claim
75 words
A pulse generator comprising a Marx generator network comprising a plurality of series and parallel connected inductances and capacitances having a power supply end and a switch end, a supply of voltage and current connected to said power supply end, means for initiating a cancellation traveling wave through said network beginning at said switch end and ending at said power supply end to charge said capacitors, and means for discharging said capacitors through a load.
Claim 3
Dependent Claim
25 words
The pulse generator as claimed in claim 1 further comprising, means for preventing said cancellation traveling wave from reaching said supply of voltage and current.
Claim 4
Dependent Claim
79 words
The pulse generator as claimed in claim 2 wherein said means for preventing said cancellation traveling wave from reaching said supply of voltage and current comprises, a capacitor connected in parallel across said supply of voltage and current, a pair of inductances connected in series to said capacitor and said supply of voltage and current, and means for discharging said cancellation traveling wave current connected across said pair of inductances and said power supply end of said Marx generator.
Claim 5
Dependent Claim
70 words
The pulse generator as claimed in claim 1 wherein said means for discharging said capacitors through a load comprises, means for detecting when said cancellation traveling wave has reached said power supply end of said network, means connected to said means for detecting said cancellation traveling wave, for coNnecting and discharging said capacitors in series through said load when said cancellation wave reaches said power supply end of said network.
Claim 6
Dependent Claim
59 words
The pulse generator as claimed in claim 4 wherein said means for connecting and discharging said capacitors in series comprises, a plurality of spark gaps connecting said capacitors in series, a plurality of triggering electrodes associated with said gaps, and means for generating an electrical potential on said triggering electrodes for breaking down the electrical resistance of said gaps.
Claim 7
Dependent Claim
30 words
The pulse generator as claimed in claim 1 further comprising means for releasing the energy in said Marx generator network upon failure of said capacitors to discharge through said load.
Claim 8
Dependent Claim
49 words
The pulse generator as claimed in claim 6 wherein said means for releasing energy in said Marx generator comprises a resistor, a spark gap connected in series with said resistor, and said series connected resistor and spark gap connected across said power supply end of said Marx generator network.
Claim 9
Dependent Claim
55 words
The pulse generator as claimed in claim 7 further comprising means for detecting current flowing through said series connected resistor and spark gap, and means connected to said means for detecting current, for connecting and discharging said capacitors in series through said load upon detection of a current flowing through said resistor and spark gap.
Claim 10
Dependent Claim
39 words
The pulse generator as claimed in claim 8 wherein said means for connecting and discharging said capacitors in series comprises a plurality of spark gaps connecting said capacitors in series, and means for causing said spark gaps to conduct.
Claim 11
Dependent Claim
50 words
The pulse generator as claimed in claim 9 wherein said means for causing said spark gaps to conduct comprises a plurality of triggering electrodes associated with each of said spark gaps, and means for generating an electrical potential on said electrodes for breaking down the electrical resistance of said gaps.
Claim 12
Dependent Claim
153 words
A pulse generator comprising, a direct current power supply, means for rapidly interrupting the flow of electrical current, a first plurality of inductances connected in series having one end connected to one side of said direct current and voltage power supply, and its other end connected to one side of said means for rapidly interrupting an electrical current, a second plurality of inductances equal in number to said first plurality of inductances connected in series having one end connected to the other side of said direct current power supply and its other end connected to the other side of said means for interrupting an electrical current, a plurality of capacitors connected in parallel between said first and second plurality of inductances, each of said capacitors connecting corresponding inductances in said first plurality of inductances with said second plurality of inductances, and means for connecting and discharging said capacitors in series through a load.
Claim 13
Dependent Claim
153 words
A pulse generator comprising, a direct current power supply, means for rapidly interrupting the flow of electrical current, a first plurality of inductances connected in series having one end connected to one side of said direct current and voltage power supply, and its other end connected to one side of said means for rapidly interrupting an electrical current, a second plurality of inductances equal in number to said first plurality of inductances connected in series having one end connected to the other side of said direct current power supply and its other end connected to the other side of said means for interrupting an electrical current, a plurality of capacitors connected in parallel between said first and second plurality of inductances, each of said capacitors connecting corresponding inductances in said first plurality of inductances with said second plurality of inductances, and means for connecting and discharging said capacitors in series through a load.
Claim 14
Dependent Claim
27 words
The pulse generator as claimed in claim 11 further comprising means for limiting the flow of surge current back to said direct current and voltage power supply.
Claim 15
Dependent Claim
59 words
The pulse generator as claimed in claim 12 wherein said means for limiting the flow of surge current back to said direct current and voltage power supply comprises, an inductance connected between said direct current and voltage power supply and said first and second plurality of inductances, and a capacitor connected across said direct current and voltage power supply.
Claim 16
Dependent Claim
55 words
The pulse generator as claimed in claim 11 further comprising means for causing the energy of a traveling wave traversing down said plurality of inductances and capacitances toward said direct current and voltage power supply to be dissipated in the event said first and second plurality of inductances and plurality of capacitances fails to erect.
Claim 17
Dependent Claim
32 words
The pulse generator as claimed in claim 11 further comprising meAns connected across said means for interrupting an electrical current for causing said electrical discharge from said plurality of capacitors to peak.
Claim 18
Dependent Claim
56 words
A pulse generator comprising, a Marx generator network, a direct current power supply connected to one side of said Marx generator network, and means for interrupting an electrical current connecting the two legs of said Marx generator network at the side of said network opposite the side connected to said direct current and voltage power supply.
Claim 19
Dependent Claim
56 words
A pulse generator comprising, a Marx generator network, a direct current power supply connected to one side of said Marx generator network, and means for interrupting an electrical current connecting the two legs of said Marx generator network at the side of said network opposite the side connected to said direct current and voltage power supply.
Claim 20
Dependent Claim
29 words
The pulse generator as claimed in claim 16 further comprising means for limiting the flow of surge current back from said Marx generator to said direct current power supply.
Claim 21
Dependent Claim
45 words
The pulse generator as claimed in claim 17 wherein said means for limiting the flow of surge current back to said direct current power supply comprises an inductance connected between said power supply and said Marx generator, and a capacitor connected across said power supply.
Claim 22
Dependent Claim
44 words
The pulse generator as claimed in claim 18 further comprising, means for causing the energy of a traveling wave traversing down said Marx generator network toward said direct current power supply to be dissipated in the event said Marx generator network fails to erect.
Claim 23
Dependent Claim
57 words
The pulse generator as claimed in claim 19 wherein said means for causing the energy of said cancellation traveling wave to be dissipated comprises, a resistor, a spark gap connected in series with said resistance, said series connected resistance and spark gap connected across the side of said Marx generator that is connected to said power supply.
Claim 24
Dependent Claim
30 words
The pulse generator as claimed in claim 16 further comprising means connected across said load for causing said electrical discharge from said Marx generator to have a fast rise time.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |