US4274547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enclosed switchboard
Assignee: Toshiba Corp
•
Filing: 1979-11-28
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Granted: 1981-06-23
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Expires: 1999-11-28
Abstract
Abstract In an enclosed switchboard, each of side plates is provided, along both edges thereof, with vertically extending ribs having a U-shaped cross section protruding toward the confronting side plate. Connecting members for connecting the side plates are formed to fit in U-shaped cutaway portions provided at the upper and the lower ends of the ribs. A vertically extending opening is provided in the side plate to permit ventilation and wirings through the side plate.
Inventors
- 👤 Masatomo Takagi
- 👤 Tsuguo Noritake
- 👤 Mitsuo Ogaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:30
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/26; H02B1/30; H02B1/308; H02B1/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
In an enclosed switchboard having a pair of side plates disposed in parallel with and to confront each other and connecting members for connecting the side plates to each other to form a vertical box, the improvement wherein each side plate comprises a substantially flat sheet provided, along both edges thereof, with vertically extending ribs having U-shaped cross-section protruding toward the confronting side plate, the upper and the lower ends of each rib are provided with substantially U-shaped cutaway portions, both ends of each connecting member are formed to fit in the U-shaped cutaway portions, and each side plate is provided with a vertically extending opening and a bent portion protruding from an edge of said opening toward the confronting side plate.
Claim 2
Dependent Claim
122 words
In an enclosed switchboard having a pair of side plates disposed in parallel with and to confront each other and connecting members for connecting the side plates to each other to form a vertical box, the improvement wherein each side plate comprises a substantially flat sheet provided, along both edges thereof, with vertically extending ribs having U-shaped cross-section protruding toward the confronting side plate, the upper and the lower ends of each rib are provided with substantially U-shaped cutaway portions, both ends of each connecting member are formed to fit in the U-shaped cutaway portions, and each side plate is provided with a vertically extending opening and a bent portion protruding from an edge of said opening toward the confronting side plate.
Claim 3
Dependent Claim
22 words
An enclosed switchboard according to claim 1, wherein the opening extends substantially from the bottom to the top of each side plate.
Claim 4
Dependent Claim
24 words
An enclosed switchboard according to claim 1, wherein said opening and said pent portion are formed by blanking and bending out said flat sheet.
Claim 5
Dependent Claim
19 words
An enclosed switchboard according to claim 1, wherein said bent portion and said ribs are provided with fixing holes.
Claim 6
Dependent Claim
15 words
An enclosed switchboard according to claim 1, wherein said connecting member comprises a channel member.
Claim 7
Dependent Claim
22 words
An enclosed switchboard according to claim 5, wherein said connecting member is provided with a vertically extending lug secured to the rib.
Claim 8
Dependent Claim
38 words
An enclosed switchboard according to claim 1, wherein said vertically extending opening is provided in the center of each side wall, and said bent portion is provided along each of the both edges of said vertically extending opening.
References Cited (Backward Citations)
US2042848A
Cited
US2196399A
Cited
US2686704A
Cited
US2727800A
Cited
US3056639A
Cited
US3192306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-22 | 1984-12-22 | 1985-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-22 | 1988-12-22 | 1989-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-22 | 1992-12-22 | 1993-06-23 | $7700.00 | Window Closed / Lapsed |