GB792802A - Interlocking mechanism for electric switches - Google Patents

Interlocking mechanism for electric switches

Info

Publication number
GB792802A
GB792802A GB20668/54A GB2066854A GB792802A GB 792802 A GB792802 A GB 792802A GB 20668/54 A GB20668/54 A GB 20668/54A GB 2066854 A GB2066854 A GB 2066854A GB 792802 A GB792802 A GB 792802A
Authority
GB
United Kingdom
Prior art keywords
switch
cover
plate
slot
tongues
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
GB20668/54A
Inventor
Sidney Roland Lowe
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.)
Midland Electric Manufacturing Co Ltd
Original Assignee
Midland Electric Manufacturing 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 Midland Electric Manufacturing Co Ltd filed Critical Midland Electric Manufacturing Co Ltd
Priority to GB20668/54A priority Critical patent/GB792802A/en
Publication of GB792802A publication Critical patent/GB792802A/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
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/22—Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts

Landscapes

  • Fuses (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

792,802. Switch covers. MIDLAND ELECTRIC MANUFACTURING CO., Ltd. Oct. 4, 1955 [July 15, 1954], No. 20668/54. Class 38 (5). A combined switch and fuse comprises an operating lever 7 projecting through a slot 8 in a removable cover 9 and a plate 13 movable with the lever and having tongues 13a which overlap the longitudinal edges of the slot to prevent the removal of the cover when the switch is " on. " In the " off " position the tongues 13a lie under a widened portion of the slot, thus allowing the cover to be removed. An indicator plate 5, formed of or covered with insulating material, may be slidably disposed above the plate 13 to move with the lever, the words " off," " on " being read through apertures in the cover 9 and a shield plate 10. Alternatively the indicator plate itself may be provided with the catch tongues 13a. A spring- loaded bolt 16 engages a movable part of the switch when the cover is off to prevent operation of the switch.
GB20668/54A 1954-07-15 1954-07-15 Interlocking mechanism for electric switches Expired GB792802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB20668/54A GB792802A (en) 1954-07-15 1954-07-15 Interlocking mechanism for electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20668/54A GB792802A (en) 1954-07-15 1954-07-15 Interlocking mechanism for electric switches

Publications (1)

Publication Number Publication Date
GB792802A true GB792802A (en) 1958-04-02

Family

ID=10149687

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20668/54A Expired GB792802A (en) 1954-07-15 1954-07-15 Interlocking mechanism for electric switches

Country Status (1)

Country Link
GB (1) GB792802A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358482A2 (en) * 1988-09-08 1990-03-14 Eaton Corporation Electrical switching device with cover interlock

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0358482A2 (en) * 1988-09-08 1990-03-14 Eaton Corporation Electrical switching device with cover interlock
EP0358482A3 (en) * 1988-09-08 1991-11-06 Eaton Corporation Electrical switching device with cover interlock
AU628364B2 (en) * 1988-09-08 1992-09-17 Westinghouse Electric Corporation Electrical switching device with cover interlock

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