Patent US3769478A successfully refreshed from Google Patents.
US3769478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isolating circuit breaker and operating mechanism therefor
Assignee: PORTER CO H
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Filing: 1971-03-01
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Granted: 1973-10-30
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Expires: 1991-03-01
Abstract
Abstract A rotary disconnect switch includes separate main contacts and vacuum contacts mounted within the disconnect switch. A remote mechanical operator connected to a power device serves to close and open the disconnect, main and vacuum contacts in a particular ordered sequence. The operator also includes a latched spring driver to assure rapid closing of the contacts in sequence.
Inventors
- 👤 D Weston
- 👤 R Kupetis
- 👤 D Karathanos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:56
CPC Classifications
H; H01; H01H; H01H31/00; H01H31/14; H01H31/16; H01H31/18; H01H31/20; H01H3/00; H01H3/22; H01H3/30; H01H33/00; H01H33/02; H01H33/04; H01H33/12; H01H33/121; H01H33/125; H01H33/127
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
177 words
In a circuit breaker having a T-component with a terminal at each end of the horizontal portion thereof, said T-component being rotatable about its vertical axis to make and break a circuit thereacross between spaced stationary contacts, the combination of first switch means connected between said terminals, second switch means connected between said terminals in parallel with said first switch means, a shaft operatively connected to said first switch means and said second switch means for closing said switch means, cam means between said shaft and said first switch means for sequentially closing said first switch means after closure of said second switch means, and accelerator means connected to said shaft for rapidly closing said first and second switch means in sequence, said accelerator means comprising a second shaft spaced from said first shaft and parallel thereto, spring means for imparting instantaneous rotary motion to said second shaft, a toggle linkage operatively connected between said first and second shafts, and latch means for preventing release of said spring until after closure between said terminals and stationary contacts.
Claim 2
Dependent Claim
177 words
In a circuit breaker having a T-component with a terminal at each end of the horizontal portion thereof, said T-component being rotatable about its vertical axis to make and break a circuit thereacross between spaced stationary contacts, the combination of first switch means connected between said terminals, second switch means connected between said terminals in parallel with said first switch means, a shaft operatively connected to said first switch means and said second switch means for closing said switch means, cam means between said shaft and said first switch means for sequentially closing said first switch means after closure of said second switch means, and accelerator means connected to said shaft for rapidly closing said first and second switch means in sequence, said accelerator means comprising a second shaft spaced from said first shaft and parallel thereto, spring means for imparting instantaneous rotary motion to said second shaft, a toggle linkage operatively connected between said first and second shafts, and latch means for preventing release of said spring until after closure between said terminals and stationary contacts.
Claim 3
Dependent Claim
172 words
An operating mechanism for a pair of shafts, said shafts including an outer shaft mounted for rotation about its axis and an inner shaft rotatably mounted within said outer shaft, said mechanism comprising spring means associated with the inner shaft for rotating the shaft in one direction, power means for rotating the outer shaft in both directions, a first crank secured at the other end of the inner shaft and having an arm and a latching surface extending therefrom, a second crank secured above said first crank on said outer shaft and having latch means pivotally carried on the underside thereof, a lever pivotally mounted on said outer shaft, said lever having a first projection engageable with said latch means and a second projection engageable with the arm of the first crank, and means for urging said first crank through engagement with said lever, said means comprising releasable energy means operatively connected to said lever to rotate said lever, first crank and inner shaft in a direction opposite to said one direction.
Claim 4
Dependent Claim
172 words
An operating mechanism for a pair of shafts, said shafts including an outer shaft mounted for rotation about its axis and an inner shaft rotatably mounted within said outer shaft, said mechanism comprising spring means associated with the inner shaft for rotating the shaft in one direction, power means for rotating the outer shaft in both directions, a first crank secured at the other end of the inner shaft and having an arm and a latching surface extending therefrom, a second crank secured above said first crank on said outer shaft and having latch means pivotally carried on the underside thereof, a lever pivotally mounted on said outer shaft, said lever having a first projection engageable with said latch means and a second projection engageable with the arm of the first crank, and means for urging said first crank through engagement with said lever, said means comprising releasable energy means operatively connected to said lever to rotate said lever, first crank and inner shaft in a direction opposite to said one direction.
Claim 5
Dependent Claim
21 words
The operating mechanism according to claim 2 wherein said latch means engages said first projection to contain said releasable energy means.
Claim 6
Dependent Claim
82 words
The operating mechanism according to claim 2 wherein a second shaft is disposed parallel to and spaced from said inner and outer shafts, a toggle linkage is disposed between said second shaft and said outer shaft such that one end of said linkage is pivotally connected at the second projection of said lever and the other end of said linkage is secured to said second shaft, and said releasable energy means is operatively connected to the second shaft to rotate said shaft.
Claim 7
Dependent Claim
43 words
The operating mechanism according to claiM 2 wherein second latch means is provided adjacent said first crank and is engageable with said latching surface, said second latch means, when engaged, operative to restrain motion of the inner shaft in said one direction thereof.
Claim 8
Dependent Claim
81 words
The operating mechanism according to claim 5 wherein said second latch means comprises a first latch arm pivotally mounted along substantially a tangential line relative to the arc of travel of the latching surface of said bottom crank so as to be movable into and out of engagement of said latching surface, and a second latch arm pivotally mounted substantially radially with respect to said first crank and engageable with said first latch arm to retain the latter in latching position.
Claim 9
Dependent Claim
118 words
In an operating mechanism for controlling the rotation of an inner shaft around which is rotatably mounted an outer shaft, the combination of a first crank arm secured to the outer shaft and terminating in a first spring retaining head, a second shaft spaced from and parallel to said outer shaft, an arm pivotally mounted on said second shaft and having a spring retaining head on one end, compressible spring means connected between said spring mounting heads, a crank secured to said second shaft and having an abutment engageable with the other end of said arm throughout a portion of its arc of travel, and means between said second shaft and said inner shaft for transmitting motion therebetween.
Claim 10
Dependent Claim
118 words
In an operating mechanism for controlling the rotation of an inner shaft around which is rotatably mounted an outer shaft, the combination of a first crank arm secured to the outer shaft and terminating in a first spring retaining head, a second shaft spaced from and parallel to said outer shaft, an arm pivotally mounted on said second shaft and having a spring retaining head on one end, compressible spring means connected between said spring mounting heads, a crank secured to said second shaft and having an abutment engageable with the other end of said arm throughout a portion of its arc of travel, and means between said second shaft and said inner shaft for transmitting motion therebetween.
Claim 11
Dependent Claim
27 words
The operating mechanism according to claim 7 wherein rotation of the first crank arm and the arm to axially opposed positions causes compression of said spring means.
Claim 12
Dependent Claim
166 words
In a circuit breaker, a first and second pair of contacts, each pair having one contact movable into open and closed position, a shaft mounted for rotation adjacent the movable contacts of said first and second pair, a cam secured to said shaft and presenting a cam surface for urging the movable contact of said first pair into closed position, first latch means on said shaft for latching said first movable contact into closed position upon closure thereof by said cam surface, linkage means connected between said shaft and the movable contact of said second pair and operative upon rotation of said shaft in one direction to close said contacts, spring means for urging the movable contact of said first pair toward open position, spring means for urging the movable contact of said second pair toward open position to cause rotation of said shaft in the other direction, and second latch means associated with said shaft for restraining rotation of said shaft in said other direction.
Claim 13
Dependent Claim
166 words
In a circuit breaker, a first and second pair of contacts, each pair having one contact movable into open and closed position, a shaft mounted for rotation adjacent the movable contacts of said first and second pair, a cam secured to said shaft and presenting a cam surface for urging the movable contact of said first pair into closed position, first latch means on said shaft for latching said first movable contact into closed position upon closure thereof by said cam surface, linkage means connected between said shaft and the movable contact of said second pair and operative upon rotation of said shaft in one direction to close said contacts, spring means for urging the movable contact of said first pair toward open position, spring means for urging the movable contact of said second pair toward open position to cause rotation of said shaft in the other direction, and second latch means associated with said shaft for restraining rotation of said shaft in said other direction.
Claim 14
Dependent Claim
62 words
The circuit breaker of claim 9 wherein said cam and said first latch means have engageable abutments comprising opposed surfaces enabling conjoint movement, said opposing surfaces having space therebetween permitting a degree of lost motion between said cam and said first latch means, said cam being movable away from its contact before said opposed surfaces engage to disengage said first latch means.
Claim 15
Dependent Claim
41 words
The circuit breaker of claim 10 wherein said second latch means restrains motion of said shaft in a position where said cam means has moved away from its contact and the first latch means is in latching position on said contact.
Claim 16
Dependent Claim
138 words
A circuit breaker and control therefor comprising a pair of spaced terminals swingable between open and closed position on a first shaft, vacuum enclosed contacts connected between said terminals, main contacts connected between said terminals, spring means for opening said vacuum and main contacts, second shaft means rotatably mounted adjacent said vacuum and main contacts for closing first the main contacts and then the vacuum contacts in sequence against the force of said spring means upon rotation of said shaft means in one direction, means for latching said shaft means against rotation in the other direction upon closure of said main and vacuum contacts, and accelerator means connected to said second shaft for rapidly rotating said shaft in said one direction, said acceleRator means comprising spring means compressed in response to rotation of said terminals to closed position.
Claim 17
Dependent Claim
138 words
A circuit breaker and control therefor comprising a pair of spaced terminals swingable between open and closed position on a first shaft, vacuum enclosed contacts connected between said terminals, main contacts connected between said terminals, spring means for opening said vacuum and main contacts, second shaft means rotatably mounted adjacent said vacuum and main contacts for closing first the main contacts and then the vacuum contacts in sequence against the force of said spring means upon rotation of said shaft means in one direction, means for latching said shaft means against rotation in the other direction upon closure of said main and vacuum contacts, and accelerator means connected to said second shaft for rapidly rotating said shaft in said one direction, said acceleRator means comprising spring means compressed in response to rotation of said terminals to closed position.
Claim 18
Dependent Claim
63 words
The circuit breaker of claim 12 wherein said accelerator means further comprises a third shaft spaced from said first shaft and parallel thereto, means for mounting said spring means between said first and third shafts such that said spring means is compressible, and translation means for translating force from said spring to said second shaft means for rotation thereof in said one direction.
Claim 19
Dependent Claim
25 words
The circuit breaker of claim 13 wherein said translation means further comprised a toggle linkage connected between said second shaft means and said third shaft.
Claim 20
Dependent Claim
25 words
The circuit breaker of claim 14 wherein latch means is associated with said toggle linkage to prevent rotation of said shaft by said spring means.
Claim 21
Dependent Claim
107 words
The invention according to claim 12 wherein power means are connected to said first shaft for rotation thereof in both directions, said power means comprising a double-acting power cylinder having a piston, means for supplying hydraulic fluid pressure to said cylinder, valve means for controlling fluid supply to either side of said cylinder, a rack connected to said piston, a pinion engaged with said rack to be rotated thereby, a shaft extending from said pinion, a crank arm extending from said pinion shaft, a second crank arm secured to said first shaft, and a link pivotally connected at its free ends to respective first and second cranks.
References Cited (Backward Citations)
US3566055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |