US1763805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for protecting vacuum tubes
Assignee: DRAHTLOSE TELEGRAPHIE MBH
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Filing: 1922-11-14
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Granted: 1930-06-17
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Expires: 1942-11-14
Abstract
Abstract 189,095. Ges. f³r Drahtlose Telegraphie. Nov. 14, 1921, [Convention date]. Vacuum tubes.-In a valve generator overheating of the anode is prevented by the provision of an auxiliary anode, by means of which the feed current circuit is interrupted or reduced when the temperature of the anode rises. The auxiliary anode 4 is connected through a battery 5 and a relay 6 with the anode 3, which, when overheated, emits electrons, which pass to the auxiliary anode 4, and the resulting current causes the relay to open the contacts 9 of the feed circuit 7, 8. The battery 5 may be replaced by a supply of rectified current.
Inventors
- 👤 Meissner Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:25
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/548
Claims Analysis
Total Claims: 0
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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) | 1933-06-16 | 1933-12-16 | 1934-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-16 | 1937-12-16 | 1938-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-16 | 1941-12-16 | 1942-06-17 | $7700.00 | Window Closed / Lapsed |