US3728585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switchboard assembly with bus bar heat pipe means
Assignee: General Electric Co
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Filing: 1972-06-12
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Granted: 1973-04-17
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Expires: 1992-06-12
Abstract
Abstract An electric switchboard assembly, including a main enclosure and a number of vertically extending main power supply busbars and electrical control devices having line terminals connected to the busbars. Heat dissipating means is provided operating on the ''''heat pipe'''' principle to dissipate heat generated in the electrical control devices and/or in the connections of such devices. The heat dissipating means operates by transporting the heat to a different location in the switchboard from that in which it is created and dissipating it to suitable heat receiving means such as a circulating heat receiving medium such as air. The vertically extending power supply busbars each comprise a pair of spaced tubular busbar members. The electrical control devices are connected to a first one of the pair of busbars, and the other one of the pair of busbars is provided with heat dissipating means, such as fins. The pair of busbars are spaced apart and are interconnected by tubular members adjacent the top and bottom ends to form a closed loop. This closed loop is evacuated and provided with a liquid and wicking means so that it acts as a heat pipe whereby heat which is transmitted to the first one of the members of the pair of busbars from the electrical control devices or by the flow of current therethrough is carried to the other member of the pair and dissipated to the circulating air around the fins.
Inventors
- 👤 W Olashaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:50
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/56; F; F28; F28D; F28D15/00; F28D15/02; F28D15/0266; H02G; H02G5/00; H02G5/10; H01; H01H; H01H9/00; H01H9/52; H01H2009/523; H02B1/20; H02B1/21
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
231 words
An electric power switchboard assembly comprising: a. a supporting frame; b. a plurality of vertically extending power bus bars supported on said frame; c. terminal means carried by each of said bus bars for connecting an incoming power conductor thereto; d. each of said vertically extending bus bars including first and second longitudinally extending tubular portions; e. said first of said longitudinally extending tubular portions including connecting means for electrically connecting at least one electric power takeoff device thereto; f. a first passageway interconnecting said first and second tubular portions of each of said bus bars adjacent the upper ends thereof and a second passageway interconnecting said first and second tubular portions of each of said bus bars adjacent the lower ends thereof to form a closed loop passage within said bus bar, and g. an evaporable liquid medium contained in said closed loop passage, whereby heat generated in said power take-off devices, in said connecting means, and in said bus bar causes evaporation of said liquid medium in said first tubular portion with absorption of heat and creation of a vapor therein which expands and passes into said second tubular portion through said first passageway where it condenses and gives up heat and collects in liquid form at the lower portion of said second tubular portion and returns as a liquid through said second passageway to said first tubular portion.
Claim 2
Dependent Claim
231 words
An electric power switchboard assembly comprising: a. a supporting frame; b. a plurality of vertically extending power bus bars supported on said frame; c. terminal means carried by each of said bus bars for connecting an incoming power conductor thereto; d. each of said vertically extending bus bars including first and second longitudinally extending tubular portions; e. said first of said longitudinally extending tubular portions including connecting means for electrically connecting at least one electric power takeoff device thereto; f. a first passageway interconnecting said first and second tubular portions of each of said bus bars adjacent the upper ends thereof and a second passageway interconnecting said first and second tubular portions of each of said bus bars adjacent the lower ends thereof to form a closed loop passage within said bus bar, and g. an evaporable liquid medium contained in said closed loop passage, whereby heat generated in said power take-off devices, in said connecting means, and in said bus bar causes evaporation of said liquid medium in said first tubular portion with absorption of heat and creation of a vapor therein which expands and passes into said second tubular portion through said first passageway where it condenses and gives up heat and collects in liquid form at the lower portion of said second tubular portion and returns as a liquid through said second passageway to said first tubular portion.
Claim 3
Dependent Claim
34 words
An electric power switchboard assembly as set forth in claim 1 wherein said second longitudinally extending tubular portion of each of said bus bars includes heat-dissipating fins thereon for Facilitating dissipation of heat therefrom.
Claim 4
Dependent Claim
79 words
An electric power switchboard assembly as set forth in claim 1 wherein said supporting frame comprises a generally box-like enclosure having front and back, top and bottom, and opposed side walls, said bus bars extending between said top and bottom walls parallel to said front and back walls, and said supporting frame including venting openings for facilitating the flow of air vertically in said switchboard assembly adjacent at least said second longitudinally extending tubular portions of said bus bars.
Claim 5
Dependent Claim
30 words
An electric power switchboard assembly as set forth in claim 1 wherein each of said bus bars includes a longitudinally extending web portion interconnecting said first and second tubular portions.
Claim 6
Dependent Claim
39 words
An electric power switchboard assembly as set forth in claim 1 wherein said first longitudinally extending tubular portion of each of said bus bars includes a longitudinally extending rib for receiving clamp-type electric connecting means in plug-in engagement therewith.
Claim 7
Dependent Claim
128 words
An electric power switchboard assembly as set forth in claim 1 wherein said assembly also includes a second group of bus bars, each of said second group of bus bars comprising spaced front and back vertically extending short tubular sections, said front tubular sections including means for connection to power control devices and said back tubular sections including means for connection to outgoing load conductors, said front and back tubular sections being interconnected at the upper and lower portions thereof by conductive tubular connecting means to form a closed loop having an evaporable liquid therein whereby heat is absorbed from said front section by said liquid as it is transformed from liquid to vapor form and is given up to said back section as said liquid is recondensed.
Claim 8
Dependent Claim
35 words
An electric power switchboard assembly as set forth in claim 1 wherein said vertically extending bus bars are each formed of a single continuous pipe-like member having the configuration of a generally rectangular loop shape.
References Cited (Backward Citations)
US3354261A
Cited
US3662137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |