Patent UST870005I4 successfully refreshed from Google Patents.
US4313072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light modulated switches and radio frequency emitters
Assignee: United States Department of Energy
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Filing: 1979-10-10
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Granted: 1982-01-26
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Expires: 1999-10-10
Abstract
Abstract The disclosure relates to a light modulated electron beam driven radiofrequency emitter. Pulses of light impinge on a photoemissive device which generates an electron beam having the pulse characteristics of the light. The electron beam is accelerated through a radiofrequency resonator which produces radiofrequency emission in accordance with the electron, hence, the light pulses.
Inventors
- 👤 Mahlon T. Wilson
- 👤 Paul J. Tallerico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:02
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/01; H01; H01J; H01J23/00; H01J23/02; H01J23/04; H01J25/00; H01J25/02; H01J25/04; H01J3/00; H01J3/02; H01J3/021; H01J2201/00; H01J2201/34; H01J2201/342
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
174 words
A light modulated electron beam driven radiofrequency emitter for power generation comprising: means for providing reduced atmospheric pressure of at least 10 -6 torr for a selected enclosed environment; a radiofrequency resonator having a selected resonant frequency and period disposed within said environment; means for providing discrete pulses of light of duration less than about 15% of said resonant period of said radiofrequency resonator at said resonant frequency or a harmonic thereof; photocathode means within said environment for receiving said light pulses and for generating a pulsed electron beam having a time structure essentially the same as said light pulses; electrode means for accelerating said pulsed electron beam toward said resonator to increase kinetic energy of electrons present in the pulses of said beam, said pulsed electron beam passing through said resonator and interacting therewith, thereby converting the electron kinetic energy to radiofrequency fields within said resonator; means for withdrawing radiofrequency power from said resonator by interacting coupling means with said radiofrequency fields; and means for transmitting said radiofrequency power out of said environment.
Claim 2
Dependent Claim
174 words
A light modulated electron beam driven radiofrequency emitter for power generation comprising: means for providing reduced atmospheric pressure of at least 10 -6 torr for a selected enclosed environment; a radiofrequency resonator having a selected resonant frequency and period disposed within said environment; means for providing discrete pulses of light of duration less than about 15% of said resonant period of said radiofrequency resonator at said resonant frequency or a harmonic thereof; photocathode means within said environment for receiving said light pulses and for generating a pulsed electron beam having a time structure essentially the same as said light pulses; electrode means for accelerating said pulsed electron beam toward said resonator to increase kinetic energy of electrons present in the pulses of said beam, said pulsed electron beam passing through said resonator and interacting therewith, thereby converting the electron kinetic energy to radiofrequency fields within said resonator; means for withdrawing radiofrequency power from said resonator by interacting coupling means with said radiofrequency fields; and means for transmitting said radiofrequency power out of said environment.
Claim 3
Dependent Claim
21 words
The invention of claim 1 further comprising means disposed within said environment for collecting electrons after their traverse of said resonator.
Claim 4
Dependent Claim
21 words
The invention of claim 2 further comprising means for preventing secondary electrons from returning to said resonator from said collecting means.
Claim 5
Dependent Claim
14 words
The invention of claim 1 wherein said light pulse providing means comprises a laser.
Claim 6
Dependent Claim
21 words
The invention of claim 4 wherein said light pulse providing means comprises means for modelocking said laser to form said pulses.
Claim 7
Dependent Claim
13 words
The invention of claim 5 wherein said modelocking means comprises an electrooptical modulator.
Claim 8
Dependent Claim
13 words
The invention of claim 5 wherein said modelocking means comprises an acoustooptical modulator.
Claim 9
Dependent Claim
14 words
The invention of claim 5 wherein said modelocking means comprises a passive dye cell.
Claim 10
Dependent Claim
28 words
The invention of claim 1 further comprising means for shifting the frequency of said light pulses disposed between said pulse providing means and said electron beam generating means.
Claim 11
Dependent Claim
36 words
The invention of claim 1 wherein said light pulse providing means is disposed externally of said enclosed environment and said environment providing means comprises means for allowing the passage of said light pulses into said environment.
Claim 12
Dependent Claim
16 words
The invention of claim 1 wherein said light pulse providing means is disposed within said environment.
References Cited (Backward Citations)
US3403257A
Cited
US3931595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |