Patent US3235774A successfully refreshed from Google Patents.
US3235774A
Expired / Lapsed
US
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Metalclad switchgear in double-unit construction
Assignee: BBC Brown Boveri AG Germany
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Filing: 1962-06-28
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Granted: 1966-02-15
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Expires: 1982-06-28
Abstract
No abstract record available.
Inventors
- 👤 Eghertus A Frowein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:23
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/20; H02B1/22; H02B5/00; H02B5/06; H02B7/00; H02B7/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A METALCLAD SWITCHGEAR PLANT COMPRISING TWO THREEPHASE LONGITUDINALLY EXTENDING BUS BAR SYSTEMS, ARRANGED PARALLEL TO EACH OTHER, FIRST AND SECOND THREE-POLE SWITCHING UNITS, EACH POLE OF SAID FIRST AND SECOND UNITS COMPRISING A CIRCUIT BREAKER AND TWO ISOLATING SWITCHES FOR CONNECTING THE SAME TO CORRESPONDING PHASES ON SAID TWO BUS BAR SYSTEMS, SAID CIRCUIT BREAKERS BEING CONTAINED IN RELATIVELY WIDE CASINGS AND SAID ISOLATING SWITCHES BEING CONTAINED IN RELATIVELY NARROW CASINGS, THE RESPECTIVE POLES OF SAID FIRST AND SECOND SWITCHING UNITS BEING ARRANGED ALTERNATELY TO THE RIGHT AND LEFT TOWARD THE CENTER OF SAID TWO BUS BAR SYSTEMS SUCH THAT THE CASINGS FOR THE ISOLATING SWITCHES OF THE THREE POLES OF SAID FIRST SWITCHING UNITS ARE LOCATED IN OVERLAPPING RELATION WITH RESPECT TO SAID INTERPOSED BETWEEN THE CASINGS FOR THE ISOLATING SWITCHES OF THE THREE POLES OF SAID SECOND SWITCHING UNIT.
Claim 2
Dependent Claim
141 words
A METALCLAD SWITCHGEAR PLANT COMPRISING TWO THREEPHASE LONGITUDINALLY EXTENDING BUS BAR SYSTEMS, ARRANGED PARALLEL TO EACH OTHER, FIRST AND SECOND THREE-POLE SWITCHING UNITS, EACH POLE OF SAID FIRST AND SECOND UNITS COMPRISING A CIRCUIT BREAKER AND TWO ISOLATING SWITCHES FOR CONNECTING THE SAME TO CORRESPONDING PHASES ON SAID TWO BUS BAR SYSTEMS, SAID CIRCUIT BREAKERS BEING CONTAINED IN RELATIVELY WIDE CASINGS AND SAID ISOLATING SWITCHES BEING CONTAINED IN RELATIVELY NARROW CASINGS, THE RESPECTIVE POLES OF SAID FIRST AND SECOND SWITCHING UNITS BEING ARRANGED ALTERNATELY TO THE RIGHT AND LEFT TOWARD THE CENTER OF SAID TWO BUS BAR SYSTEMS SUCH THAT THE CASINGS FOR THE ISOLATING SWITCHES OF THE THREE POLES OF SAID FIRST SWITCHING UNITS ARE LOCATED IN OVERLAPPING RELATION WITH RESPECT TO SAID INTERPOSED BETWEEN THE CASINGS FOR THE ISOLATING SWITCHES OF THE THREE POLES OF SAID SECOND SWITCHING UNIT.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |