US3772489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Racking safety disconnect switch for vacuum circuit breakers
Assignee: ABB Inc USA
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Filing: 1972-07-17
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Granted: 1973-11-13
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Expires: 1992-07-17
Abstract
Abstract A spring-actuated disconnect switch is connected in series with the contacts of a truck-mounted vacuum interrupter and the main disconnect contacts of the circuit breaker. The disconnect switch is carried on the truck and the disconnect switch contacts are open and remain open when the main disconnects are racked closed. Racking the breaker to the connected position charges a disconnect switch spring operating mechanism which can be remotely discharged to close the disconnect switch after the breaker is racked to a connected position.
Inventors
- 👤 G Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:54
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/666; H02; H02B; H02B11/00; H02B11/12; H02B11/127; H02B11/133; H01H2033/6667; H01H33/02; H01H33/022
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
200 words
In combination; a metallic cubicle, a truck-mounted vacuum interrupter movable by a racking mechanism within said metallic cubicle, and a safety disconnect switch; said metallic cubicle having a pair of fixed disconnect contacts therein; said truckmounted vacuum interrupter having a pair of movable disconnect contacts mounted thereon which are movable into and out of engagement with said fixed disconnect contacts as said truckmounted interrupter is racked between a connected and disconnected position within said cubicle; said truck-mounted vacuum interrupter having first and second vacuum interrupter terminals; said first interrupter terminal connected to one of said pair of movable disconnect contacts; said safety disconnect switch including a movable switch blade means movable independently of movement of said truck-mounted vacuum interrupter between an open position which disconnects said interrupter terminals from an external circuit and a closed position in which one end of said switch blade means is connected to the other of said pair of movable disconnect contacts, and the other end of said switch blade means is connected to said second interrupter terminal; and remotely operable operating means for operating said switch blade means to its said closed position when said truck-mounted vacuum interrupter is in its said connected position.
Claim 2
Dependent Claim
200 words
In combination; a metallic cubicle, a truck-mounted vacuum interrupter movable by a racking mechanism within said metallic cubicle, and a safety disconnect switch; said metallic cubicle having a pair of fixed disconnect contacts therein; said truckmounted vacuum interrupter having a pair of movable disconnect contacts mounted thereon which are movable into and out of engagement with said fixed disconnect contacts as said truckmounted interrupter is racked between a connected and disconnected position within said cubicle; said truck-mounted vacuum interrupter having first and second vacuum interrupter terminals; said first interrupter terminal connected to one of said pair of movable disconnect contacts; said safety disconnect switch including a movable switch blade means movable independently of movement of said truck-mounted vacuum interrupter between an open position which disconnects said interrupter terminals from an external circuit and a closed position in which one end of said switch blade means is connected to the other of said pair of movable disconnect contacts, and the other end of said switch blade means is connected to said second interrupter terminal; and remotely operable operating means for operating said switch blade means to its said closed position when said truck-mounted vacuum interrupter is in its said connected position.
Claim 3
Dependent Claim
90 words
The combination of claim 1 wherein said operating means includes a spring-charged mechanism and latch therefore; said spring-charged mechanism being connected to said truck-mounted vacuum interrupter and charged responsive to movment of said truck-mounted vacuum interrupter to said connected position and being latched in a charged condition by said latch; and a remotely operable latch defeating means for releasing said latch to discharge said spring-charged mechanism; said spring-charged mechanism connected to said switch blade means and moving said switch blade means to said closed position when said latch is released.
Claim 4
Dependent Claim
57 words
The combination of claim 2 which further includes an opening spring charged by the operation of said operating means when closing said switch blade means; said opening spring connected to said switch blade means and moving said switch blade means to its said open position when said truck-mounted circuit interrupter is moved to its said disconnected position.
Claim 5
Dependent Claim
71 words
The combination of claim 2 which further includes movable bracket means movably mounted on said truck-mounted vacuum interrupter and having one portion thEreof engageable by a portion of said cubicle and another portion thereof engaging said spring-charged mechanism, whereby movement of said truckmounted vacuum interrupter to its said connected position causes said movable bracket means to engage said cubicle and to move relative to said cubicle to charge said spring-charged mechanism.
Claim 6
Dependent Claim
57 words
The combination of claim 1 which further includes an opening spring charged by the operation of said operating means when closing said switch blade means; said opening spring connected to said switch blade means and moving said switch blade means to its said open position when said truck-mounted circuit interrupter is moved to its said disconnected position.
Claim 7
Dependent Claim
23 words
The combination of claim 1 wherein said switch blade means is pivotally mounted relative to said other of said pair of movable contacts.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |