GB423241A - Improvements in snap-action electric switches - Google Patents

Improvements in snap-action electric switches

Info

Publication number
GB423241A
GB423241A GB2067433A GB2067433A GB423241A GB 423241 A GB423241 A GB 423241A GB 2067433 A GB2067433 A GB 2067433A GB 2067433 A GB2067433 A GB 2067433A GB 423241 A GB423241 A GB 423241A
Authority
GB
United Kingdom
Prior art keywords
armature
stops
action
polepieces
quick
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
GB2067433A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2067433A priority Critical patent/GB423241A/en
Publication of GB423241A publication Critical patent/GB423241A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/64—Contacts
    • H01H37/66—Magnetic reinforcement of contact pressure; Magnet causing snap action

Landscapes

  • Braking Arrangements (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)

Abstract

423,241. Partly magnetic thermal switches. PIPER, T. W., Hillbury, Redbourn, St. Albans, Hertfordshire. July 22, 1933, No. 20674. [Class 38 (v)] A thermal switch having magnetic means for providing a quick - action, comprises a bimetallic strip 4 carrying at its free end an armature 3 adapted, in the on and off positions of the switch, to engage adjustable stops 7 on polepieces 2 of a permanent magnet 1. A rod 8 passing loosely through a hole in the armature 3 is fitted with stops 9 and is connected to a pivoted arm 5 carrying a contact bridge 11 having wiping engagement with fixed contacts 6. When the bimetallic strip 4 heats up it bends until it overcomes the force of attraction of the armature 3 which moves rapidly upwards and strikes the upper stop 9. The kinetic energy of the armature is sufficient to overcome the contact friction and to ensure a quick-action, the armature then resting on the upper stops 7 on the polepieces.
GB2067433A 1933-07-22 1933-07-22 Improvements in snap-action electric switches Expired GB423241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2067433A GB423241A (en) 1933-07-22 1933-07-22 Improvements in snap-action electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2067433A GB423241A (en) 1933-07-22 1933-07-22 Improvements in snap-action electric switches

Publications (1)

Publication Number Publication Date
GB423241A true GB423241A (en) 1935-01-22

Family

ID=10149777

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2067433A Expired GB423241A (en) 1933-07-22 1933-07-22 Improvements in snap-action electric switches

Country Status (1)

Country Link
GB (1) GB423241A (en)

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