US3258693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load current indicator including a transformer coupled suppressed glow discharge device
Assignee: —
•
Filing: —
•
Granted: 1966-06-28
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:21
CPC Classifications
G; G01; G01R; G01R21/00; G01R21/007; G01R21/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A CURRENT INDICATOR COMPRISING, (1) A TRANSFORMER HAVING A PRIMARY WINDING AND A SECONDARY WINDING, (2) A GLOW DISCHARGE DEVICE HAVING A PREDETERMINED IGNITION THRESHOLD VOLTAGE AND HAVING ONE ELECTRODE CONNECTED TO ONE END OF SAID SECONDARY WINDING, (3) AN ALTERNATING CURRENT POWER SOURCE CONNECTED TO ANOTHER ELECTRODE OF SAID GLOW DISCHARGE DEVICE AND THE OTHER END OF SAID SECONDARY WINDING FOR PROVIDING SUFFICIENT EXCITATION VOLTAGE TO EXCEED SAID THRESHOLD, AND (4) A LOAD CONNECTED ACROSS SAID POWER SOURCE AND NORMALLY ENERGIZED THEREBY, (5) SAID LOAD BEING CONNECTED IN SERIES WITH SAID PRIMARY WINDING OF SAID TRANSFORMER, (6) SAID TRANSFORMER HAVING A TURNS RATIO BETWEEN SAID PRIMARY AND SECONDARY WINDINGS TOPROVIDE AN OPPOSITION VOLTAGE WITH RESPECT TO SAID EXCITATION VOLTAGE TO PREVENT IGNITION OF SAID GOLW DISCHARGE DEVICE WHEN SAID LOAD HAS A NORMAL CURRENT FLOWING THERETHROUGH AND TO PERMIT IGNITION WHEN SAID LOAD HAS AN ABNORMAL CURRENT FLOWING THERETHROUGH.
Claim 2
Dependent Claim
150 words
A CURRENT INDICATOR COMPRISING, (1) A TRANSFORMER HAVING A PRIMARY WINDING AND A SECONDARY WINDING, (2) A GLOW DISCHARGE DEVICE HAVING A PREDETERMINED IGNITION THRESHOLD VOLTAGE AND HAVING ONE ELECTRODE CONNECTED TO ONE END OF SAID SECONDARY WINDING, (3) AN ALTERNATING CURRENT POWER SOURCE CONNECTED TO ANOTHER ELECTRODE OF SAID GLOW DISCHARGE DEVICE AND THE OTHER END OF SAID SECONDARY WINDING FOR PROVIDING SUFFICIENT EXCITATION VOLTAGE TO EXCEED SAID THRESHOLD, AND (4) A LOAD CONNECTED ACROSS SAID POWER SOURCE AND NORMALLY ENERGIZED THEREBY, (5) SAID LOAD BEING CONNECTED IN SERIES WITH SAID PRIMARY WINDING OF SAID TRANSFORMER, (6) SAID TRANSFORMER HAVING A TURNS RATIO BETWEEN SAID PRIMARY AND SECONDARY WINDINGS TOPROVIDE AN OPPOSITION VOLTAGE WITH RESPECT TO SAID EXCITATION VOLTAGE TO PREVENT IGNITION OF SAID GOLW DISCHARGE DEVICE WHEN SAID LOAD HAS A NORMAL CURRENT FLOWING THERETHROUGH AND TO PERMIT IGNITION WHEN SAID LOAD HAS AN ABNORMAL CURRENT FLOWING THERETHROUGH.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |