Patent US3411038A successfully refreshed from Google Patents.
US3411038A
Expired / Lapsed
US
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Vacuum-type circuit interrupter
Assignee: General Electric Co
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Filing: 1966-07-22
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Granted: 1968-11-12
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Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:41
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/02; H01H33/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A VACUUM-TYPE CIRCUIT INTERRUPTER FOR ALTERNATING CURRENT CIRCUITS COMPRISING: (A) A HIGHLY EVACUATED ENVELOPE HAVING A NORMAL PRESSURE OF 10-4 MM. OF MERCURY OR LESS, (B) A PAIR OF ELECTRODES WITHIN SAID ENVELOPE HAVING A SPACED-APART POSITION DEFINING A PRIMARY GAP THEREBETWEEN, (C) TRIGGERING MEANS INCLUDING A TRIGGER GAP WITHIN SAID ENVELOPE FOR INITIATING AN ARC-OVER OF SAID PRIMARY GAP IN RESPONSE TO SPARK-OVER OF SAID PRIMARY (D) MEANS FOR PRODUCING A SPARK-OVER OF SAID TRIGGER GAP WHEN THE VOLTAGE ACROSS SAID PRIMARY GAP REACHES A PREDETERMINED VALUE, COMPRISING: (I) A VOLTAGE DIVIDER CONNECTED ACROSS SAID PRIMARY GAP AND COMPRISING SERIES-CONNECTED CAPACITORS, (II) A TRIGGER CIRCUIT COMPRISING A BIDIRECTIONAL DIODE THYRISTOR HAVING A RESISTANCE THAT CHANGES FROM A VERY HIGH VALUE TO A VERY LOW VALUE WHEN THE VOLTAGE APPLIED THERETO REACHES A PREDETERMINED AVALANCHE VALUE, (III) MEANS FOR CONNECTING SAID TRIGGER CIRCUIT ACROSS ONE OF SAID CAPACITORS, WHEREBY A PREDETERMINED PERCENTAGE OF THE VOLTAGE APPEARING ACROSS SAID PRIMARY GAP IS APPLIED TO SAID TRIGGER CIRCUIT, (IV) AND MEANS FOR APPLYING A VOLTAGE PULSE TO SAID TRIGGER GAP IN RESPONSE TO SAID THYRISTOR SWITCHING TO ITS LOW RESISTANCE STATE.
Claim 2
Dependent Claim
189 words
A VACUUM-TYPE CIRCUIT INTERRUPTER FOR ALTERNATING CURRENT CIRCUITS COMPRISING: (A) A HIGHLY EVACUATED ENVELOPE HAVING A NORMAL PRESSURE OF 10-4 MM. OF MERCURY OR LESS, (B) A PAIR OF ELECTRODES WITHIN SAID ENVELOPE HAVING A SPACED-APART POSITION DEFINING A PRIMARY GAP THEREBETWEEN, (C) TRIGGERING MEANS INCLUDING A TRIGGER GAP WITHIN SAID ENVELOPE FOR INITIATING AN ARC-OVER OF SAID PRIMARY GAP IN RESPONSE TO SPARK-OVER OF SAID PRIMARY (D) MEANS FOR PRODUCING A SPARK-OVER OF SAID TRIGGER GAP WHEN THE VOLTAGE ACROSS SAID PRIMARY GAP REACHES A PREDETERMINED VALUE, COMPRISING: (I) A VOLTAGE DIVIDER CONNECTED ACROSS SAID PRIMARY GAP AND COMPRISING SERIES-CONNECTED CAPACITORS, (II) A TRIGGER CIRCUIT COMPRISING A BIDIRECTIONAL DIODE THYRISTOR HAVING A RESISTANCE THAT CHANGES FROM A VERY HIGH VALUE TO A VERY LOW VALUE WHEN THE VOLTAGE APPLIED THERETO REACHES A PREDETERMINED AVALANCHE VALUE, (III) MEANS FOR CONNECTING SAID TRIGGER CIRCUIT ACROSS ONE OF SAID CAPACITORS, WHEREBY A PREDETERMINED PERCENTAGE OF THE VOLTAGE APPEARING ACROSS SAID PRIMARY GAP IS APPLIED TO SAID TRIGGER CIRCUIT, (IV) AND MEANS FOR APPLYING A VOLTAGE PULSE TO SAID TRIGGER GAP IN RESPONSE TO SAID THYRISTOR SWITCHING TO ITS LOW RESISTANCE STATE.
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) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |