US3689793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode arrangement for direct current fed gas discharge lamps
Assignee: Individual
•
Filing: 1970-10-20
•
Granted: 1972-09-05
•
Expires: 1990-10-20
Abstract
Abstract A d.c. gas discharge lamp in which the space at the electrodes communicates through one or more apertures sufficiently small in cross-section to prevent arcing but sufficiently large to permit diffusion of metallic vapor. A single channel or a diaphragm may be utilized in a hot or cold cathode tube.
Inventors
- 👤 Alfred Walz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:02
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
An electrode arrangement for a d. c. gas discharge lamp in which the spaces receiving the electrodes at the ends of the discharge path communicate by way of a capillary system preventing gas discharge while simultaneously permitting the diffusion of metallic vapor therethrough.
Claim 2
Dependent Claim
43 words
An electrode arrangement for a d. c. gas discharge lamp in which the spaces receiving the electrodes at the ends of the discharge path communicate by way of a capillary system preventing gas discharge while simultaneously permitting the diffusion of metallic vapor therethrough.
Claim 3
Dependent Claim
69 words
A gas discharge tube comprising: a a tight envelope containing a metallic vapor; a pair of electrodes disposed within said envelope; means for establishing a gaseous discharge along a first path between said electrodes within said envelope; and, diaphragm means for permitting the diffusion of said metallic vapor between said electrodes along a second path, said diaphragm means preventing the establishment of a gaseous discharge along said second path.
Claim 4
Dependent Claim
69 words
A gas discharge tube comprising: a a tight envelope containing a metallic vapor; a pair of electrodes disposed within said envelope; means for establishing a gaseous discharge along a first path between said electrodes within said envelope; and, diaphragm means for permitting the diffusion of said metallic vapor between said electrodes along a second path, said diaphragm means preventing the establishment of a gaseous discharge along said second path.
References Cited (Backward Citations)
US3117248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |