GB718043A - Cases for electrical instruments or relays - Google Patents

Cases for electrical instruments or relays

Info

Publication number
GB718043A
GB718043A GB275552A GB275552A GB718043A GB 718043 A GB718043 A GB 718043A GB 275552 A GB275552 A GB 275552A GB 275552 A GB275552 A GB 275552A GB 718043 A GB718043 A GB 718043A
Authority
GB
United Kingdom
Prior art keywords
cradle
relay
switch
strips
cases
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
GB275552A
Inventor
Albert Russell Van C Warringto
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.)
English Electric Co Ltd
Original Assignee
English Electric Co 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB275552A priority Critical patent/GB718043A/en
Publication of GB718043A publication Critical patent/GB718043A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Relay Circuits (AREA)

Abstract

718,043. Switch cases. ENGLISH ELECTRIC CO., Ltd. Jan. 30 1953 [Feb 1, 1952], No. 2755/52. Class 38(5) [Also in Group XXXVI] A case for electrical apparatus, e.g. a protective relay, comprises an outer container formed of a U-shaped metal part 1 closed at the top and bottom by insulating blocks 2, 3, and having a flange 4 at its front to which a cover (not shown) is fixed. A cradle for supporting the relay comprises front and rear inverted U-shaped frames 13 connected near the top and bottom by strips 14, 15, which engage ribs 16, 17 formed on the blocks 2, 3 when the cradle is slid into the container. When the cradle is in position a series of contact strips 20 thereon engages a corresponding series of strips 9 on the block 3 to complete a number of circuits to the relay (see Group XXXVI). In order to automatically open the circuit controlled by the relay when the cradle is removed a switch 34 is mounted on the cradle and has an operating arm 35 engaged by a projection 36 on a member 37 slidable on screws 19 on the cradle and biased forwardly by a spring 38, whereby when the front cover is removed the spring moves the member 37 to permit the switch to open.
GB275552A 1952-02-01 1952-02-01 Cases for electrical instruments or relays Expired GB718043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB275552A GB718043A (en) 1952-02-01 1952-02-01 Cases for electrical instruments or relays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB275552A GB718043A (en) 1952-02-01 1952-02-01 Cases for electrical instruments or relays

Publications (1)

Publication Number Publication Date
GB718043A true GB718043A (en) 1954-11-10

Family

ID=9745287

Family Applications (1)

Application Number Title Priority Date Filing Date
GB275552A Expired GB718043A (en) 1952-02-01 1952-02-01 Cases for electrical instruments or relays

Country Status (1)

Country Link
GB (1) GB718043A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2062734A5 (en) * 1969-10-01 1971-06-25 Asea Ab

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2062734A5 (en) * 1969-10-01 1971-06-25 Asea Ab

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