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 like

Info

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
Application number
GB216223A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WILLIAM DE RENZI
Original Assignee
WILLIAM DE RENZI
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WILLIAM DE RENZI filed Critical WILLIAM DE RENZI
Priority to GB216223A priority Critical patent/GB214346A/en
Publication of GB214346A publication Critical patent/GB214346A/en
Expired legal-status Critical Current

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.
GB216223A 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 Expired GB214346A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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