US4504885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch board
Assignee: Hitachi Ltd
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Filing: 1983-04-20
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Granted: 1985-03-12
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Expires: 2003-04-20
Abstract
Abstract A switch board with a casing thereof supported on right and left vertical supports includes a conduction chamber and an upper and lower electricity chambers with a partition wall therebetween. A drawer-type electric device is adapted to operate into and out of the electricity chambers, so that a secondary movable plug of the drawer-type electric device is connected and disconnected to a secondary control stationary plug in each of the electricity chambers. Control lines are connected between the secondary control stationary plug and the control terminal in the upper electricity chamber. Wiring ducts for containing the control lines include control ducts arranged along the ceiling of the casing from the control terminal, vertical ducts communicating with the right and left sides of the control duct, and horizontal ducts for connecting an end of the vertical ducts to the secondary control stationary plug of the upper electricity chamber and the other end thereof to the secondary control stationary plug of the lower electricity chamber.
Inventors
- 👤 Isao Yoshikawa
- 👤 Tooru Tanimizu
- 👤 Sinzi Sugitani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:43
CPC Classifications
H; H02; H02B; H02B11/00; H02B11/12; H02B11/167
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
194 words
A switch board comprising a switch box with a casing thereof mounted on vertical supports erected on right and left sides, a conduction chamber and at least a pair of upper and lower electricity chambers with a partition wall having primary circuit breaker sections, said partition wall being located between said electricity chambers and said conduction chamber in said switch box, drawer-type electric devices thrown into and out of said electricity chamber, secondary control stationary plugs within said switch box adapted to connect and disconnect with a secondary movable plug each of said drawer-type electric devices, control lines connecting said secondary control stationary plug and control terminals mounted on said switch box, and wiring ducts containing said control lines; wherein said wiring ducts include control ducts having a control terminal arranged adjacent to the upper electricity chamber, an opening communicating with said vertical supports, vertical ducts communicating with said opening and located in said vertical supports, horizontal ducts connecting an end of said vertical ducts to said secondary control stationary plug of said lower electricity chamber and the other end of said vertical ducts to said secondary stationary plug of said lower electricity chamber.
Claim 2
Dependent Claim
194 words
A switch board comprising a switch box with a casing thereof mounted on vertical supports erected on right and left sides, a conduction chamber and at least a pair of upper and lower electricity chambers with a partition wall having primary circuit breaker sections, said partition wall being located between said electricity chambers and said conduction chamber in said switch box, drawer-type electric devices thrown into and out of said electricity chamber, secondary control stationary plugs within said switch box adapted to connect and disconnect with a secondary movable plug each of said drawer-type electric devices, control lines connecting said secondary control stationary plug and control terminals mounted on said switch box, and wiring ducts containing said control lines; wherein said wiring ducts include control ducts having a control terminal arranged adjacent to the upper electricity chamber, an opening communicating with said vertical supports, vertical ducts communicating with said opening and located in said vertical supports, horizontal ducts connecting an end of said vertical ducts to said secondary control stationary plug of said lower electricity chamber and the other end of said vertical ducts to said secondary stationary plug of said lower electricity chamber.
Claim 3
Dependent Claim
24 words
A switch board according to claim 1, wherein said control ducts are mounted on the top of said casing making up said switch box.
Claim 4
Dependent Claim
51 words
A switch board according to claim 1 or 2, wherein the control lines for the upper electricity chamber are arranged on one side of the control duct divided by a dash board while the control lines for the lower electricity chamber are located on the other side of the control duct.
Claim 5
Dependent Claim
22 words
A switch board according to claim 1 or 2, wherein said control duct and said vertical ducts are provided with detachable covers.
Claim 6
Dependent Claim
24 words
A switch board according to claim 1 or 2, wherein a baffle board forms a detour of said control lines in said horizontal ducts.
Claim 7
Dependent Claim
29 words
A switch board according to claim 1 or 2, wherein a baffle board deteriorates the air flow in the opening of said control duct communicating with said vertical ducts.
Claim 8
Dependent Claim
21 words
A switch board according to claim 1 or 2, wherein a baffle board deteriorates the air flow in said vertical ducts.
Claim 9
Dependent Claim
18 words
A switch board according to claim 1, wherein said control terminal is arranged above the upper electricity chamber.
Claim 10
Dependent Claim
22 words
A switch board according to claim 3, wherein a baffle board forms a detour of said control lines in said horizontal ducts.
Claim 11
Dependent Claim
22 words
A switch board according to claim 4, wherein a baffle board forms a detour of said control lines in said horizontal ducts.
Claim 12
Dependent Claim
27 words
A switch board according to claim 3, wherein a baffle board deteriorates the air flow in the opening of said control duct communicating with said vertical ducts.
Claim 13
Dependent Claim
27 words
A switch board according to claim 4, wherein a baffle board deteriorates the air flow in the opening of said control duct communicating with said vertical ducts.
Claim 14
Dependent Claim
27 words
A switch board according to claim 5, wherein a baffle board deteriorates the air flow in the opening of said control duct communicating with said vertical ducts.
Claim 15
Dependent Claim
19 words
A switch board according to claim 3, wherein a baffle board deteriorates the air flow in said vertical ducts.
Claim 16
Dependent Claim
19 words
A switch board according to claim 4, wherein a baffle board deteriorates the air flow in said vertical ducts.
Claim 17
Dependent Claim
19 words
A switch board according to claim 5, wherein a baffle board deteriorates the air flow in said vertical ducts.
Claim 18
Dependent Claim
19 words
A switch board according to claim 6, wherein a baffle board deteriorates the air flow in said vertical ducts.
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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |