GB2019718A - Enclosures for electrical equipment - Google Patents

Enclosures for electrical equipment

Info

Publication number
GB2019718A
GB2019718A GB7845868A GB7845868A GB2019718A GB 2019718 A GB2019718 A GB 2019718A GB 7845868 A GB7845868 A GB 7845868A GB 7845868 A GB7845868 A GB 7845868A GB 2019718 A GB2019718 A GB 2019718A
Authority
GB
United Kingdom
Prior art keywords
flametrap
enclosure
electrical equipment
sealed
filter element
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.)
Granted
Application number
GB7845868A
Other versions
GB2019718B (en
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.)
Chalmers & Mitchell Ltd
Original Assignee
Chalmers & Mitchell Ltd
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 Chalmers & Mitchell Ltd filed Critical Chalmers & Mitchell Ltd
Priority to GB7845868A priority Critical patent/GB2019718B/en
Publication of GB2019718A publication Critical patent/GB2019718A/en
Application granted granted Critical
Publication of GB2019718B publication Critical patent/GB2019718B/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/12—Flameproof or explosion-proof arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

The invention provides for flameproof, weatherproof enclosures for electrical equipment for use in hazardous areas where inflammable gases or other substances are or may be present in quantities sufficient to produce explosive or ignitable mixtures during normal operation of the electrical equipment. The enclosure (1) which is of sufficient thickness and mechanical strength to withstand the internal ignition of explosive gases comprises a body member (2) sealed for weather tightness which is provided with a metallic flametrap (3) communicating with the interior of the enclosure and having a replaceable filter element (10) therein of metallic foil or mesh structure to provide for cooling and deionizlng products of combustion as they pass through the flametrap (3). The outer end of the flametrap is sealed by a bursting disc (9) of predetermined bursting strength which seals the flametrap against the weather. A translucent portion may be formed in the enclosure. The filter element (10) may be in the form of alternate planar and crimped strips of metallic foil in face-to-face relation and either folded, stacked or coiled and held together by an annular clamping member. <IMAGE>
GB7845868A 1977-12-09 1978-11-23 Enclosures for electrical equipment Expired GB2019718B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7845868A GB2019718B (en) 1977-12-09 1978-11-23 Enclosures for electrical equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB5130777 1977-12-09
GB7845868A GB2019718B (en) 1977-12-09 1978-11-23 Enclosures for electrical equipment

Publications (2)

Publication Number Publication Date
GB2019718A true GB2019718A (en) 1979-11-07
GB2019718B GB2019718B (en) 1982-08-04

Family

ID=26266834

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7845868A Expired GB2019718B (en) 1977-12-09 1978-11-23 Enclosures for electrical equipment

Country Status (1)

Country Link
GB (1) GB2019718B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135820A (en) * 1983-02-25 1984-09-05 Gte Prod Corp Electric lamp with high outer-envelope to inner-envelope wall-thickness ratio
WO2004108219A1 (en) * 2003-06-06 2004-12-16 Leinemann Gmbh & Co. Kg Permanently fireproof flame guard

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135820A (en) * 1983-02-25 1984-09-05 Gte Prod Corp Electric lamp with high outer-envelope to inner-envelope wall-thickness ratio
WO2004108219A1 (en) * 2003-06-06 2004-12-16 Leinemann Gmbh & Co. Kg Permanently fireproof flame guard
US7918664B2 (en) 2003-06-06 2011-04-05 Leinemann Gmbh & Co. Kg Permanently fireproof flame guard

Also Published As

Publication number Publication date
GB2019718B (en) 1982-08-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee