GB523674A - Improvements in or relating to means for preventing sparking in electric switches - Google Patents

Improvements in or relating to means for preventing sparking in electric switches

Info

Publication number
GB523674A
GB523674A GB97039A GB97039A GB523674A GB 523674 A GB523674 A GB 523674A GB 97039 A GB97039 A GB 97039A GB 97039 A GB97039 A GB 97039A GB 523674 A GB523674 A GB 523674A
Authority
GB
United Kingdom
Prior art keywords
contact
mercury
engagement
fixed
switch
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
GB97039A
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.)
ARON ELECTRICITY METER Ltd
Original Assignee
ARON ELECTRICITY METER 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 ARON ELECTRICITY METER Ltd filed Critical ARON ELECTRICITY METER Ltd
Priority to GB97039A priority Critical patent/GB523674A/en
Publication of GB523674A publication Critical patent/GB523674A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/16—Switches having at least one liquid contact operated by dipping soil contact into stationary contact liquid

Landscapes

  • Breakers (AREA)

Abstract

523,674. Arc rupturing in switches. AROV ELECTRICITY METER, Ltd., and RIORDAN, E. J. Jan. 11, 1939, No. 970. [Class 38 (v)] In a switch particularly for prepayment meters adapted to take a current of say 25 amperes or more, ciruit is first made and last broken at spark-taking metal contacts 19a, 22a of say tungsten which are arranged in parallel with the main switch which comprises a fixed contact 4 in permanent engagement with a body of mercury 5 and a movable contact 3 adapted to be lowered into the mercury until it eventually engages the contact 4. To open the switch, an operating shaft, not shown, causes the raising of a member 16 fixed to the contact 3 till this is clear of the mercury. The member 16 then engages the head of a screw 21 fixed to the contact 19a and raises this out of engagement with the contact 22a. The circuit to the contact 22a is through a strip 23 and a fusible nut 24. Should the contacts therefore overheat, the nut melts and the strip 23 moves into engagement with an insulating lip 25.
GB97039A 1939-01-11 1939-01-11 Improvements in or relating to means for preventing sparking in electric switches Expired GB523674A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB97039A GB523674A (en) 1939-01-11 1939-01-11 Improvements in or relating to means for preventing sparking in electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB97039A GB523674A (en) 1939-01-11 1939-01-11 Improvements in or relating to means for preventing sparking in electric switches

Publications (1)

Publication Number Publication Date
GB523674A true GB523674A (en) 1940-07-19

Family

ID=9713720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB97039A Expired GB523674A (en) 1939-01-11 1939-01-11 Improvements in or relating to means for preventing sparking in electric switches

Country Status (1)

Country Link
GB (1) GB523674A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174019A (en) * 1962-01-09 1965-03-16 Allis Chalmers Mfg Co Vacuum tube interrupter having sequential separable contacts
US3566750A (en) * 1969-03-10 1971-03-02 Foxboro Co Differential pressure cell with keystone structure
US3646294A (en) * 1970-12-31 1972-02-29 Itt Switch
US4727229A (en) * 1985-01-28 1988-02-23 Hodkin George A Interrupter isolator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174019A (en) * 1962-01-09 1965-03-16 Allis Chalmers Mfg Co Vacuum tube interrupter having sequential separable contacts
US3566750A (en) * 1969-03-10 1971-03-02 Foxboro Co Differential pressure cell with keystone structure
US3646294A (en) * 1970-12-31 1972-02-29 Itt Switch
US4727229A (en) * 1985-01-28 1988-02-23 Hodkin George A Interrupter isolator

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