GB212537A - Improvements relating to electrical protective devices - Google Patents

Improvements relating to electrical protective devices

Info

Publication number
GB212537A
GB212537A GB4921/24A GB492124A GB212537A GB 212537 A GB212537 A GB 212537A GB 4921/24 A GB4921/24 A GB 4921/24A GB 492124 A GB492124 A GB 492124A GB 212537 A GB212537 A GB 212537A
Authority
GB
United Kingdom
Prior art keywords
contact
protective devices
pile
bracket
electrical
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
GB4921/24A
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical 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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Publication of GB212537A publication Critical patent/GB212537A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element

Landscapes

  • Thermally Actuated Switches (AREA)
  • Breakers (AREA)

Abstract

212,537. Metropolitan-Vickers Electrical Co., Ltd.. (Assignees of Hineline, H. D., and Mylius, W. G.). March 5, 1923, [Convention date]. Thermal switches. -A bimetallic thermally-operated switch for use in electric protective devices comprises a number of superposed elements having an electrical length at least twice their linear length. In one modification, each element is slotted and somewhat M-shaped as shown in Fig. 6 being insulated from the next element except at one end so that the current has a sinuous path across each element and also through the pile. As shown the current normally passes through the end 2 of the device, by the bracket 6 to the pile of the thermal elements 17 whence it emerges to proceed along the bracket 8 to the other end. On the occurrence of excessive heating the strip 17 bends to bring the movable contact 26 into contact with the contact 27 and so to the terminal 13 to allow tripping as shown diagrammatically in Fig. 6. The superposed strips may be in parallel.
GB4921/24A 1923-03-05 1924-02-26 Improvements relating to electrical protective devices Expired GB212537A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US212537XA 1923-03-05 1923-03-05

Publications (1)

Publication Number Publication Date
GB212537A true GB212537A (en) 1924-07-03

Family

ID=21803203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4921/24A Expired GB212537A (en) 1923-03-05 1924-02-26 Improvements relating to electrical protective devices

Country Status (1)

Country Link
GB (1) GB212537A (en)

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