Patent US3249859A successfully refreshed from Google Patents.
US3249859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring the starting characteristics of gasfilled discharge lamps
Assignee: General Electric Co
•
Filing: 1961-09-25
•
Granted: 1966-05-03
•
Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 Dimitrios M Speros
- 👤 Peter R Buccilli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:01
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/24; G01R31/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
THE METHOD OF ELIMINATING DEFECTIVE LAMPS IN MANUFACTURE OF FLUORESCENT LAMPS OF THE KIND WHEREIN IGNITION PROCEEDS THROUGH THE STAGE OF A FORMATIVE TIME LAG TO AN INTERMEDIATE STAGE OF GENERALIZED EMISSION CORRESPONDING TO GLOW DISCHARGE AND THENCE TO A FINAL STAGE OF ARC DISCHARGE, WHICH COMPRISES APPLYING CATHODE HEATING CURRENT AT LEAST TO THE ELECTRODE SERVING AS CATHODE, CONNECTING THE LAMP ACROSS A CIRCUIT PROVIDING A PREDETERMINED RELATIVELY LOW OVERVOLTAGE SUFFICIENT TO IGNITE THE LAMP AND INCLUDING CURRENT LIMITING MEANS, MEASURING THE TIME LENGTH (PLATEAU A) CORRESPONDING TO THE FORMATIVE TIME LAG FOR BREAKDOWN, MEASURING THE VOLTAGE HEIGHT (PLATEAU B) CORRESPONDING TO THE PERIOD OF GENERALIZED EMISSION FROM THE CATHODE, AND REJECTING THE LAMP IF EITHER OF SAID MEASUREMENTS FALLS OUTSIDE OF THE PREDETER MINED LIMITS FOR LAMPS OF THE SAME TYPE.
Claim 2
Independent Claim
133 words
THE METHOD OF ELIMINATING DEFECTIVE LAMPS IN MANUFACTURE OF FLUORESCENT LAMPS OF THE KIND WHEREIN IGNITION PROCEEDS THROUGH THE STAGE OF A FORMATIVE TIME LAG TO AN INTERMEDIATE STAGE OF GENERALIZED EMISSION CORRESPONDING TO GLOW DISCHARGE AND THENCE TO A FINAL STAGE OF ARC DISCHARGE, WHICH COMPRISES APPLYING CATHODE HEATING CURRENT AT LEAST TO THE ELECTRODE SERVING AS CATHODE, CONNECTING THE LAMP ACROSS A CIRCUIT PROVIDING A PREDETERMINED RELATIVELY LOW OVERVOLTAGE SUFFICIENT TO IGNITE THE LAMP AND INCLUDING CURRENT LIMITING MEANS, MEASURING THE TIME LENGTH (PLATEAU A) CORRESPONDING TO THE FORMATIVE TIME LAG FOR BREAKDOWN, MEASURING THE VOLTAGE HEIGHT (PLATEAU B) CORRESPONDING TO THE PERIOD OF GENERALIZED EMISSION FROM THE CATHODE, AND REJECTING THE LAMP IF EITHER OF SAID MEASUREMENTS FALLS OUTSIDE OF THE PREDETER MINED LIMITS FOR LAMPS OF THE SAME TYPE.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |