US3603753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalclad switchgear using vacuum interrupter elements
Assignee: Westinghouse Electric Corp
•
Filing: 1968-02-28
•
Granted: 1971-09-07
•
Expires: 1988-02-28
Abstract
Abstract A circuit breaker for metalclad switchgear use is provided using vacuum-interrupter elements in substitution of the usually provided magnetic and insulating plate structures, customarily employed. A resilient mounting for the interrupter elements is provided, together with massive end contact blocks for heat dissipation generated within the vacuum-interrupter elements. A pivoted operating lever, connected to the massive contact block secured to the moving contact of the vacuum-interrupter, is operated by a resilient connection to the insulating operating rod of the circuit breaker. Because of the reduced dimensions, the cubicle dimensions may be drastically reduced, if desired.
Inventors
- 👤 Russell E Frink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:04
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/666; H01H1/00; H01H1/50; H01H2033/6667; H01H3/00; H01H3/60; H01H3/605; H01H33/02; H01H33/022
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
107 words
A truck-mounted multipole vacuum-type circuit interrupter including, in combination: a. a wheeled truck carrying a plurality of side-by-side vertically disposed vacuum-interrupter units; b. the upper and lower terminal ends of each vertically disposed vacuum-interrupter unit being electrically connected to upper and lower spaced horizontally disposed terminal bushings; the truck additionally carrying an operating mechanism for the simultaneous operation of all the vertically disposed vacuumtype interrupter units; and, a flexible mounting means being provided for each vacuum-type interrupter unit including at least one flexible conducting strap interposed between the terminal of one of the terminal bushing for each unit and one of the ends of said respective unit.
Claim 2
Dependent Claim
107 words
A truck-mounted multipole vacuum-type circuit interrupter including, in combination: a. a wheeled truck carrying a plurality of side-by-side vertically disposed vacuum-interrupter units; b. the upper and lower terminal ends of each vertically disposed vacuum-interrupter unit being electrically connected to upper and lower spaced horizontally disposed terminal bushings; the truck additionally carrying an operating mechanism for the simultaneous operation of all the vertically disposed vacuumtype interrupter units; and, a flexible mounting means being provided for each vacuum-type interrupter unit including at least one flexible conducting strap interposed between the terminal of one of the terminal bushing for each unit and one of the ends of said respective unit.
Claim 3
Dependent Claim
46 words
The truck-mounted multipole vacuum-type circuit interrupter of claim 1, including: a pivotally mounted operating lever connected to the movable vertically actuable contact of each vacuum-interrupter unit; and, an insulating operating rod mechanically connected between the free end of the respective operating lever and the operating mechanism.
Claim 4
Dependent Claim
57 words
The combination according to claim 1 wherein each vacuum-type circuit-interrupter element includes a pair of separable contacts separated within an evacuated enclosure, at least one contact rod supporting one of said contacts extending externally of the evacuated enclosure, and a heat sink comprising a relatively massive contact block secured to the external end of said contact rod.
Claim 5
Dependent Claim
17 words
The combination according to claim 3, wherein the contact block is split and adapted for clamping action.
Claim 6
Dependent Claim
41 words
The combination according to claim 1, wherein the flexible mounting means includes a plurality of laterally extending flexible conducting straps interposed between the terminals of the two terminal bushings of each interrupter unit and the ends of said respective interrupter unit.
Claim 7
Dependent Claim
55 words
At the combination according to claim 1, wherein each vacuum-type circuit interrupter element includes a pair of separable contacts separated within an evacuated enclosure, stationary and movable contact rods extending externally of the evacuated enclosure, and a pair of heat sinks comprising relatively massive contact blocks secured to the external ends of said contact rods.
Claim 8
Dependent Claim
55 words
The combination according to claim 1, wherein the upper end of each of the vacuum-type interrupter units includes as a part of said flexible mounting means a pair of laterally extending flexible conducting straps extending between the upper end of the respective unit and the terminal of the upper terminal bushing for said respective unit.
Claim 9
Dependent Claim
27 words
The combination according to claim 3, wherein the flexible mounting means for each unit includes a pair of straps disposed on opposite sides of said heat sink.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |