GB676824A - Improvements relating to the prevention of sparking at the contacts breaking a direct current inductive electric circuit in mines and like places - Google Patents

Improvements relating to the prevention of sparking at the contacts breaking a direct current inductive electric circuit in mines and like places

Info

Publication number
GB676824A
GB676824A GB555650A GB555650A GB676824A GB 676824 A GB676824 A GB 676824A GB 555650 A GB555650 A GB 555650A GB 555650 A GB555650 A GB 555650A GB 676824 A GB676824 A GB 676824A
Authority
GB
United Kingdom
Prior art keywords
sparking
mines
prevention
places
direct current
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
GB555650A
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal 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 Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB555650A priority Critical patent/GB676824A/en
Publication of GB676824A publication Critical patent/GB676824A/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
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

676,824. Sparking preventing in switches. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd., and STEVENS, S. A. Jan. 30, 1951. [March 6, 1950]. No. 5556/50. Class 38 (v). In D.C. signalling or control apparatus for mines &c. sparking due to the breaking of an inductive circuit such as a relay 1 is prevented by connecting a rectifier 11 across the inductive circuit and rectifiers 10, 12, in the conductors leading to it. The circuit is normally 2, 10, 1, 12, 3. Should it be broken, the discharge current from the relay winding will be absorbed by the rectifier 11, which is arranged in the reverse direction to the other rectifiers. Accidental reversal of the polarity of the conductors 2, 3 will produce no ill effect.
GB555650A 1950-03-06 1950-03-06 Improvements relating to the prevention of sparking at the contacts breaking a direct current inductive electric circuit in mines and like places Expired GB676824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB555650A GB676824A (en) 1950-03-06 1950-03-06 Improvements relating to the prevention of sparking at the contacts breaking a direct current inductive electric circuit in mines and like places

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB555650A GB676824A (en) 1950-03-06 1950-03-06 Improvements relating to the prevention of sparking at the contacts breaking a direct current inductive electric circuit in mines and like places

Publications (1)

Publication Number Publication Date
GB676824A true GB676824A (en) 1952-08-06

Family

ID=9798348

Family Applications (1)

Application Number Title Priority Date Filing Date
GB555650A Expired GB676824A (en) 1950-03-06 1950-03-06 Improvements relating to the prevention of sparking at the contacts breaking a direct current inductive electric circuit in mines and like places

Country Status (1)

Country Link
GB (1) GB676824A (en)

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