GB214346A - Improvements in and relating to means for limiting the pressure due to an explosion inside flameproof cases for electrical switchgear and apparatus and the like - Google Patents
Improvements in and relating to means for limiting the pressure due to an explosion inside flameproof cases for electrical switchgear and apparatus and the likeInfo
- Publication number
- GB214346A GB214346A GB216223A GB216223A GB214346A GB 214346 A GB214346 A GB 214346A GB 216223 A GB216223 A GB 216223A GB 216223 A GB216223 A GB 216223A GB 214346 A GB214346 A GB 214346A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flanges
- casing
- outlets
- cases
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
- H01H9/042—Explosion-proof cases
- H01H9/043—Explosion-proof cases with pressure-relief devices
Landscapes
- Casings For Electric Apparatus (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
214,346. Renzi, W. de. Jan. 24, 1923. Cases, covers, and lids.- Flame-proof metal casings for electrical apparatus used in mines &c. are arranged so that the explosive gases due to arcing within the case are allowed to escape through restricted spaces between adjacent broad machined flanges on the lid and casing, the gases being cooled below the ignition point before reaching the atmosphere, and excessive stresses within the casing being avoided. The switch casing g has broad flanges g<1> co-operating with similar flanges i<1> on the cover i, studs h projecting slightly above the surface of the flange g<1> to preserve a space j which serves as a gas outlet. Similar flanges c<1> on the cover c are spaced apart from flanges on the busbar chamber a by thin washers e threaded on the securing bolts d, so that gas outlets f are formed. Outlets m and s are preserved by washers r and m' between the switch casing and the bus-bar and cable outlets. To prevent ingress of dirt through the spaces so formed, they may be covered with strips t of asbestos &c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB216223A GB214346A (en) | 1923-01-24 | 1923-01-24 | Improvements in and relating to means for limiting the pressure due to an explosion inside flameproof cases for electrical switchgear and apparatus and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB216223A GB214346A (en) | 1923-01-24 | 1923-01-24 | Improvements in and relating to means for limiting the pressure due to an explosion inside flameproof cases for electrical switchgear and apparatus and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB214346A true GB214346A (en) | 1924-04-24 |
Family
ID=9734668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB216223A Expired GB214346A (en) | 1923-01-24 | 1923-01-24 | Improvements in and relating to means for limiting the pressure due to an explosion inside flameproof cases for electrical switchgear and apparatus and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB214346A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2522964A (en) * | 1945-10-03 | 1950-09-19 | Trumbull Electric Mfg Co | Hinged closure and fastener therefor |
-
1923
- 1923-01-24 GB GB216223A patent/GB214346A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2522964A (en) * | 1945-10-03 | 1950-09-19 | Trumbull Electric Mfg Co | Hinged closure and fastener therefor |
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