US3251940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light valve apparatus
Assignee: General Electric Co
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Filing: 1964-01-13
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Granted: 1966-05-17
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Expires: 1984-01-13
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Roussin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:12
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/12; H01J31/00; H01J31/08; H01J31/10; H01J31/24; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
218 words
A LIGHT VALVE APPARATUS FOR POSITIONING BETWEEN A LIGHT SOURCE AND A SCREEN FOR THE PROJECTION OF AN IMAGE ON THE SCREEN, SAID APPARATUS COMPRISING: (A) AN EVACUATED ENVELOPE, (B) A LIGHT-MODULATING FLUID POSITIONED IN SAID ENVELOPE AND ARRANGED TO CONTROL THE PASSAGE OF LIGHT FROM THE SOURCE TO THE SCREEN, (C) CATHODE MEANS POSITIONED IN SAID ENVELOPE AND ARRANGED TO EMIT A BEAM OF ELECTRONS IMPINGENT UPON SAID LIGHT-MODULATING FLUID TO FORM A DIFFRACTION GRATING THEREON FOR SELECTIVELY CONTROLLING THE PASSAGE OF LIGHT FROM THE SOURCE TO THE SCREEN IN ACCORDANCE WITH THE IMAGE BEING PROJECTED, (D) ELECTROSTATIC FOCUSING AND DEFLECTING MEANS POSITIONED BETWEEN SAID CATHODE MEANS AND SAID LIGHTMODULATING FLUID IN THE PATH OF SAID ELECTRON BEAM, (E) SAID LAST-MENTIONED MEANS INCLUDING A PLURALITY OF ELECTRODE UNITS AXIALLY DISPOSED ALONG SAID ELECTRON BEAM, (F) EACH OF SAID ELECTRON UNITS BEING FORMED FROM MATERIAL EXHIBITING A HIGH PERMEABILITY, AND (G) ADJACENT ONES OF SAID ELECTRODE UNITS BEING ARRANGED IN SPACED OVERLAPPING RELATIONSHIP. 4 AN ELECTROSTATIC FOCUSING AND DEFLECTING SYSTEM FOR AN ELECTRON BEAM DEVICE, SAID SYSTEM COMPRISING: (A) A PLURALITY OF ELECTRODE UNITS AXIALLY DISPOSED ALONG THE ELECTRON BEAM, (B) EACH OF SAID ELECTRODE UNITS BEING FORMED FROM MATERIAL EXHIBITING A HIGH PERMEABILITY, AND (C) ADJACENT ONES OF SAID ELECTRODES UNITS BEING ARRANGED IN SPACED OVERLAPPING RELATIONSHIP.
Claim 2
Dependent Claim
218 words
A LIGHT VALVE APPARATUS FOR POSITIONING BETWEEN A LIGHT SOURCE AND A SCREEN FOR THE PROJECTION OF AN IMAGE ON THE SCREEN, SAID APPARATUS COMPRISING: (A) AN EVACUATED ENVELOPE, (B) A LIGHT-MODULATING FLUID POSITIONED IN SAID ENVELOPE AND ARRANGED TO CONTROL THE PASSAGE OF LIGHT FROM THE SOURCE TO THE SCREEN, (C) CATHODE MEANS POSITIONED IN SAID ENVELOPE AND ARRANGED TO EMIT A BEAM OF ELECTRONS IMPINGENT UPON SAID LIGHT-MODULATING FLUID TO FORM A DIFFRACTION GRATING THEREON FOR SELECTIVELY CONTROLLING THE PASSAGE OF LIGHT FROM THE SOURCE TO THE SCREEN IN ACCORDANCE WITH THE IMAGE BEING PROJECTED, (D) ELECTROSTATIC FOCUSING AND DEFLECTING MEANS POSITIONED BETWEEN SAID CATHODE MEANS AND SAID LIGHTMODULATING FLUID IN THE PATH OF SAID ELECTRON BEAM, (E) SAID LAST-MENTIONED MEANS INCLUDING A PLURALITY OF ELECTRODE UNITS AXIALLY DISPOSED ALONG SAID ELECTRON BEAM, (F) EACH OF SAID ELECTRON UNITS BEING FORMED FROM MATERIAL EXHIBITING A HIGH PERMEABILITY, AND (G) ADJACENT ONES OF SAID ELECTRODE UNITS BEING ARRANGED IN SPACED OVERLAPPING RELATIONSHIP. 4 AN ELECTROSTATIC FOCUSING AND DEFLECTING SYSTEM FOR AN ELECTRON BEAM DEVICE, SAID SYSTEM COMPRISING: (A) A PLURALITY OF ELECTRODE UNITS AXIALLY DISPOSED ALONG THE ELECTRON BEAM, (B) EACH OF SAID ELECTRODE UNITS BEING FORMED FROM MATERIAL EXHIBITING A HIGH PERMEABILITY, AND (C) ADJACENT ONES OF SAID ELECTRODES UNITS BEING ARRANGED IN SPACED OVERLAPPING RELATIONSHIP.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |