US2721285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectroscopic lamp
Assignee: Westinghouse Electric Corp
•
Filing: 1953-05-27
•
Granted: 1955-10-18
•
Expires: 1973-05-27
Abstract
No abstract record available.
Inventors
- 👤 Norman C Beese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:42
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/24; G; G01; G01J; G01J3/00; G01J3/02; G01J3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A LIGHT GAS DISCHARGE LAMP COMPRISING A VITREOUS SEALED OUTER ENVELOPE SURROUNDING A FUZED QUARTZ SEALED DOUBLE-ENDED INNER ENVELOPE, SAID ENVELOPES HAVING INNER AND OUTER SURFACES AND LEAD-IN CONDUCTORS SEALED THERETHROUGH, ELECTRODES POSITIONED WITHIN SAID INNER ENVELOPE AND SUBSTANTIALLY AT OPPOSITE ENDS THEREOF AND SUPPORTED THEREAT BY SAID LEAD-IN CONDUCTORS, AN OPERATING CHARGE OF LIGHT GAS CONTAINED WITHIN SAID INNER ENVELOPE, SAID LEAD-IN CONDUCTORS AND SAID ELECTRODES BEING ADAPTED TO HAVE APPLIED THERETO AN ENERGIZING POTENTIAL FOR INONIZING AND CONVERTING A PORTION OF SAID OPERATING CHARGE INTO A STEADY-STATE LIGHT GAS ARC DISCHARGE BETWEEN SAID ELECTRODES, SAID OPERATING CHARGE HAVING AN AVERAGE STEADYSTATE OPERATING PRESSURE DURING SAID STEADY-STATE LIGHT GAS ARC DISCHARGE, A SEALING-RESERVOIR VOLUME BOUNDED BY SAID OUTER ENVELOPE INNER SURFACE AND SAID INNER ENVELOPE OUTER SURFACE, A LIGHT GAS SEALING-RESERVOIR CHARGE CONTAINED WITHIN SAID SEALING-RESERVOIR VOLUME AND OF SUCH MAGNITUDE THAT ITS AVERAGE PRESSURE DURING SAID STEADYSTATE LIGHT GAS ARC DISCHARGE APPROXIMATES SAID AVERAGE STEADY-STATE OPERATING PRESSURE OF SAID OPERATING CHARGE, AND A STARTING CHARGE CONTAINED WITHIN SAID SEALING-RESERVOIR VOLUME FOR MAINTAINING SAID LIGHT GAS ARC DISCHARGE WITHIN SAID INNER ENVELOPE.
Claim 2
Dependent Claim
183 words
A LIGHT GAS DISCHARGE LAMP COMPRISING A VITREOUS SEALED OUTER ENVELOPE SURROUNDING A FUZED QUARTZ SEALED DOUBLE-ENDED INNER ENVELOPE, SAID ENVELOPES HAVING INNER AND OUTER SURFACES AND LEAD-IN CONDUCTORS SEALED THERETHROUGH, ELECTRODES POSITIONED WITHIN SAID INNER ENVELOPE AND SUBSTANTIALLY AT OPPOSITE ENDS THEREOF AND SUPPORTED THEREAT BY SAID LEAD-IN CONDUCTORS, AN OPERATING CHARGE OF LIGHT GAS CONTAINED WITHIN SAID INNER ENVELOPE, SAID LEAD-IN CONDUCTORS AND SAID ELECTRODES BEING ADAPTED TO HAVE APPLIED THERETO AN ENERGIZING POTENTIAL FOR INONIZING AND CONVERTING A PORTION OF SAID OPERATING CHARGE INTO A STEADY-STATE LIGHT GAS ARC DISCHARGE BETWEEN SAID ELECTRODES, SAID OPERATING CHARGE HAVING AN AVERAGE STEADYSTATE OPERATING PRESSURE DURING SAID STEADY-STATE LIGHT GAS ARC DISCHARGE, A SEALING-RESERVOIR VOLUME BOUNDED BY SAID OUTER ENVELOPE INNER SURFACE AND SAID INNER ENVELOPE OUTER SURFACE, A LIGHT GAS SEALING-RESERVOIR CHARGE CONTAINED WITHIN SAID SEALING-RESERVOIR VOLUME AND OF SUCH MAGNITUDE THAT ITS AVERAGE PRESSURE DURING SAID STEADYSTATE LIGHT GAS ARC DISCHARGE APPROXIMATES SAID AVERAGE STEADY-STATE OPERATING PRESSURE OF SAID OPERATING CHARGE, AND A STARTING CHARGE CONTAINED WITHIN SAID SEALING-RESERVOIR VOLUME FOR MAINTAINING SAID LIGHT GAS ARC DISCHARGE WITHIN SAID INNER ENVELOPE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |