Cathode-ray device with a replaceable cathode
Abstract
Abstract A CATHODE-RAY DEVICE HAS AN ELECTRON-GUN SYSTEM WITH A REPLACEABLE CATHODE. THE CATHODE IS HOUSED IN A SPACE IN THE BASE OF THE DEVICE. THE SPACE HAS A FORWARD OPENING INTO THE BODY OF THE DEVICE FOR THE PASSAGE OF ELECTRONS AND A REAR OPENING ALLOWING WITHDRAWAL OF THE CATHODE. A VACUUM LOCK IS PROVIDED BY RESPECTIVE CLOSURES AT THE FRONT AND REAR OPENINGS, THE OPERATING MECHANISMS FOR THE CLOSURES BEING INTERLOCKED TO PREVENT ONE CLOSURE BEING OPENED UNLESS THE OTHER IS SECURELY CLOSED. EACH CLOSURE HAS A PLATE ENGAGING A SEALING RING DISPOSED ABOUT THE ASSOCIATED OPENING, THE PLATE BEING MOVED LINEARLY AWAY FROM THE SEALING RING PRIOR TO BEING TURNED TO ALIGN AN APERTURE IN THE PLATE WITH THE ASSOCIATED OPENING. CLOSURE IS EFFECTED BY A REVERSE SEQUENCE.
Inventors
- 👤 Heinrich Hogg
Bibliographic Details
Claims Analysis
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |