US3567887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiphase electric circuit breaker with phases arranged radially about a common housing and operated by a common reciprocal cam
Assignee: Allis Chalmers Corp
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Filing: 1968-12-13
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Granted: 1971-03-02
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Expires: 1988-12-13
Abstract
Abstract A three phase circuit breaker comprises a supporting housing having three insulating columns mounted on three different sides thereof but in the same plane. Each column has a casing mounted at its end. A pair of series connected vacuum switches are mounted on opposite sides of each casing in axial alignment with each other and transverse to the aforesaid plane. Each vacuum switch has a contact which is axially movable by a cam plate in the associated casing. Each cam plate is moved by a push rod which extends from the associated casing, through the associated insulating column into the housing. All push rods are operated by a single cam in the housing.
Inventors
- 👤 John J Maloney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:04
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/022; H01H3/00; H01H3/32; H01H3/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
A circuit breaker comprising: a supporting housing; a plurality of hollow insulating columns radially arranged on said housing; at least one circuit-interrupting device supported on each column; each device comprising a pair of cooperating separable contacts at least one of which is movable along an axis of said device; a pair of terminals for each device located at opposite ends thereof on said axis; the axis of the plurality of devices being parallel to one another; an axially movable push rod extending through each column and into said housing for effecting movement of the movable contact of its associated device; and cam means in said housing for effecting axial movement of all push rods; and said cam means being movable along an axis which is transverse to the axis of movement of each push rod.
Claim 2
Dependent Claim
135 words
A circuit breaker comprising: a supporting housing; a plurality of hollow insulating columns radially arranged on said housing; at least one circuit-interrupting device supported on each column; each device comprising a pair of cooperating separable contacts at least one of which is movable along an axis of said device; a pair of terminals for each device located at opposite ends thereof on said axis; the axis of the plurality of devices being parallel to one another; an axially movable push rod extending through each column and into said housing for effecting movement of the movable contact of its associated device; and cam means in said housing for effecting axial movement of all push rods; and said cam means being movable along an axis which is transverse to the axis of movement of each push rod.
Claim 3
Dependent Claim
56 words
A circuit breaker according to claim 1 comprising at least a pair of axially aligned, series-connected interrupting devices supported on each column; wherein said pair of terminals are located at opposite ends of said pair of devices and wherein said cam means effects simultaneous operation of said movable contacts of all devices in said circuit breaker.
Claim 4
Dependent Claim
61 words
A circuit breaker according to claim 2 wherein three columns are provided, one for each circuit breaker pole and all of which lie in a common plane, wherein a casing is supported on each column and each casing supports a pair of devices, and wherein said cam means moves along an axis which is parallel to the axes of said devices.
Claim 5
Dependent Claim
23 words
A circuit breaker according to claim 3 wherein said cam means comprises a single member which engages a roller on each push rod.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |