Patent US3137778A successfully refreshed from Google Patents.
US3137778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivotally mounted disconnect switch contacts
Assignee: General Electric Co
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Filing: 1962-04-16
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Granted: 1964-06-16
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Expires: 1982-04-16
Abstract
No abstract record available.
Inventors
- 👤 James R Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:00
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/42; H01H1/58; H01H1/5833; H01H2001/425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
225 words
IN AN ELECTRICAL SWITCH OF THE TYPE HAVING A PAIR OF RELATIVELY MOVABLE SELECTIVELY ENGAGEABLE AND DISENGAGEABLE CONTACTS, ONE OF SAID CONTACTS BEING A BLADE CONTACT AND THE OTHER BEING A DOUBLE FINGER CONTACT WHOSE FINGERS ENGAGE OPPOSITE SIDES OF SAID BLADE CONTACT AS SAID CONTACTS ARE MOVED INTO AND OUT OF ENGAGEMENT AND WHICH CONTACT FINGERS PINCH SAID BLADE CONTACT THEREBETWEEN WHEN SAID CONTACTS ARE IN ENGAGEMENT, SAID DOUBLE FINGER CONTACT HAVING A CENTRAL SUPPORTING MEMBER FOR ITS DOUBLE CONTACT FINGERS, SAID CENTRAL SUPPORTING MEMBER HAVING TWO PAIRS OF PROJECTIONS EXTENDING FROM OPPOSITE SIDES THEREOF AND SPACED LENGTHWISE OF SAID CONTACT FINGERS, THE PAIR OF PROJECTIONS FARTHEST FROM SAID BLADE CONTACT BEING ALIGNED IN A DIRECTION TRANSVERSE TO SAID CONTACT FINGERS AND HAVING HEMISPHERICALLY SHAPED ENDS, CIRCULAR HOLES THROUGH SAID CONTACT FINGERS OF A DIAMETER SLIGHTLY LESS THAN THE DIAMETER OF SAID HEMISPHERICALLY SHAPED ENDS, SAID HOLES BEING RESPECTIVELY SEATED ON SAID HEMISPHERICALLY SHAPED ENDS SO AS TO FORM A BALL AND SOCKET TYPE UNIVERSALLY PIVOTED ELECTROMECHANICAL CONNECTION BETWEEN SAID CONTACT FINGERS AND SAID CENTRAL SUPPORTING MEMBER, THE OTHER PAIR OF PROJECTIONS EXTENDING THROUGH A SECOND PAIR OF ALIGNED HOLES IN SAID CONTACT FINGERS, AND RESILIENT MEANS FOR BIASING SAID CONTACT FINGERS TOWARD EACH OTHER, SAID BALL AND SOCKET TYPE CONNECTION BEING THE PRINCIPAL ELECTRICAL CONNECTION BETWEEN SAID CONTACT FINGERS AND SAID CENTRAL MEMBER.
Claim 2
Dependent Claim
225 words
IN AN ELECTRICAL SWITCH OF THE TYPE HAVING A PAIR OF RELATIVELY MOVABLE SELECTIVELY ENGAGEABLE AND DISENGAGEABLE CONTACTS, ONE OF SAID CONTACTS BEING A BLADE CONTACT AND THE OTHER BEING A DOUBLE FINGER CONTACT WHOSE FINGERS ENGAGE OPPOSITE SIDES OF SAID BLADE CONTACT AS SAID CONTACTS ARE MOVED INTO AND OUT OF ENGAGEMENT AND WHICH CONTACT FINGERS PINCH SAID BLADE CONTACT THEREBETWEEN WHEN SAID CONTACTS ARE IN ENGAGEMENT, SAID DOUBLE FINGER CONTACT HAVING A CENTRAL SUPPORTING MEMBER FOR ITS DOUBLE CONTACT FINGERS, SAID CENTRAL SUPPORTING MEMBER HAVING TWO PAIRS OF PROJECTIONS EXTENDING FROM OPPOSITE SIDES THEREOF AND SPACED LENGTHWISE OF SAID CONTACT FINGERS, THE PAIR OF PROJECTIONS FARTHEST FROM SAID BLADE CONTACT BEING ALIGNED IN A DIRECTION TRANSVERSE TO SAID CONTACT FINGERS AND HAVING HEMISPHERICALLY SHAPED ENDS, CIRCULAR HOLES THROUGH SAID CONTACT FINGERS OF A DIAMETER SLIGHTLY LESS THAN THE DIAMETER OF SAID HEMISPHERICALLY SHAPED ENDS, SAID HOLES BEING RESPECTIVELY SEATED ON SAID HEMISPHERICALLY SHAPED ENDS SO AS TO FORM A BALL AND SOCKET TYPE UNIVERSALLY PIVOTED ELECTROMECHANICAL CONNECTION BETWEEN SAID CONTACT FINGERS AND SAID CENTRAL SUPPORTING MEMBER, THE OTHER PAIR OF PROJECTIONS EXTENDING THROUGH A SECOND PAIR OF ALIGNED HOLES IN SAID CONTACT FINGERS, AND RESILIENT MEANS FOR BIASING SAID CONTACT FINGERS TOWARD EACH OTHER, SAID BALL AND SOCKET TYPE CONNECTION BEING THE PRINCIPAL ELECTRICAL CONNECTION BETWEEN SAID CONTACT FINGERS AND SAID CENTRAL MEMBER.
References Cited (Backward Citations)
GB851729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |