US3404247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive protective means for vacuum type circuit interrupters
Assignee: General Electric Co
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Filing: 1966-03-08
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Granted: 1968-10-01
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Expires: 1986-03-08
Abstract
No abstract record available.
Inventors
- 👤 Glassanos Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:20
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/0005; H01H9/0038; H01F; H01F27/00; H01F27/40; H01F27/402; H01H33/00; H01H33/60; H01H33/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A VACUUM CIRCUIT INTERRUPTING APPARATUS COMPRISING, A VACUUM INTERRUPTING DEVICE HAVING AN EVACUATED ENVELOPE AND INCLUDING FIXED AND MOVABLE COOPERATING CONTACT MEMBERS EXTENDING THROUGH WALL PORTIONS OF SAID ENVELOPE IN SEALED RELATION THEREWITH, SAID FIXED CONTACT MEMBER INCLUDING A STEM PORTION FIXEDLY SEALED TO SAID ENVELOPE AND PROVIDED WITH AN INTERNAL PASSAGEWAY OPENING INTO THE INTERIOR OF SAID EVACUATED ENVELOPE, AN EXPANSIBLE CHAMBER FIXED TO SAID STEM OUTSIDE SAID ENVELOPE AND IN COMMUNICATION WITH SAID PASSAGEWAY, AN AMBIENT BODY OF FLUID IN WHICH SAID ENVELOPE IS AT LEAST PARTIALLY IMMERSED, ACTUATING MEANS FOR SAID MOVABLE CONTACT MEMBER OPERABLE BETWEEN CONTACT CLOSING AND OPENING POSITIONS, AND MEANS OPERABLE IN RESPONSE TO EXPANSION OF SAID CHAMBER UPON SIGNIFICANT INCREASE OF PRESSURE WITHIN SAID ENVELOPE TO DISABLE SAID ACTUATING MEANS AND SAID CONTACT CLOSING POSITION.
Claim 2
Dependent Claim
132 words
A VACUUM CIRCUIT INTERRUPTING APPARATUS COMPRISING, A VACUUM INTERRUPTING DEVICE HAVING AN EVACUATED ENVELOPE AND INCLUDING FIXED AND MOVABLE COOPERATING CONTACT MEMBERS EXTENDING THROUGH WALL PORTIONS OF SAID ENVELOPE IN SEALED RELATION THEREWITH, SAID FIXED CONTACT MEMBER INCLUDING A STEM PORTION FIXEDLY SEALED TO SAID ENVELOPE AND PROVIDED WITH AN INTERNAL PASSAGEWAY OPENING INTO THE INTERIOR OF SAID EVACUATED ENVELOPE, AN EXPANSIBLE CHAMBER FIXED TO SAID STEM OUTSIDE SAID ENVELOPE AND IN COMMUNICATION WITH SAID PASSAGEWAY, AN AMBIENT BODY OF FLUID IN WHICH SAID ENVELOPE IS AT LEAST PARTIALLY IMMERSED, ACTUATING MEANS FOR SAID MOVABLE CONTACT MEMBER OPERABLE BETWEEN CONTACT CLOSING AND OPENING POSITIONS, AND MEANS OPERABLE IN RESPONSE TO EXPANSION OF SAID CHAMBER UPON SIGNIFICANT INCREASE OF PRESSURE WITHIN SAID ENVELOPE TO DISABLE SAID ACTUATING MEANS AND SAID CONTACT CLOSING POSITION.
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) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |