GB647553A - Improvements in quick-action springs for electrical switching devices - Google Patents

Improvements in quick-action springs for electrical switching devices

Info

Publication number
GB647553A
GB647553A GB317748A GB317748A GB647553A GB 647553 A GB647553 A GB 647553A GB 317748 A GB317748 A GB 317748A GB 317748 A GB317748 A GB 317748A GB 647553 A GB647553 A GB 647553A
Authority
GB
United Kingdom
Prior art keywords
strip
contact
depression
snap
bimetal
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
GB317748A
Inventor
Frederick Richmond W Strafford
Harry Thomas Prestige
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.)
Belling and Lee Ltd
Original Assignee
Belling and Lee 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 Belling and Lee Ltd filed Critical Belling and Lee Ltd
Priority to GB317748A priority Critical patent/GB647553A/en
Publication of GB647553A publication Critical patent/GB647553A/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
    • H01H37/60—Means for producing snap action

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

647,553. Thermal switches; snap-action switches. BELLING & LEE, Ltd. Feb. 3, 1948, No. 3177. [Class 38(v)] [Also in Group XXXII] A snap-acting spring strip 5 for use in a switch requiring a low operating differential, has a stamped-out contact-carrying tongue 6 and a side 11 formed with a depression 12 on the inner edge, whereby that edge is given a greater length than the corresponding outer edge and the strip tends to curve concave upwardly. One end 8 of the strip is fixed and the other end 7 engaged by a bimetal strip 24 adjustably mounted on a spring 25. On increase of temperature the strip 24 deflects downwards and inverts the curvature of the depression 12 and the contact-carrying end 13 of the tongue 6 leaves the fixed contact 2.3. A slight decrease in temperature suffices for the bimetal to bend upwardly and permit the strip 5 to revert to its original shape.
GB317748A 1948-02-03 1948-02-03 Improvements in quick-action springs for electrical switching devices Expired GB647553A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB317748A GB647553A (en) 1948-02-03 1948-02-03 Improvements in quick-action springs for electrical switching devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB317748A GB647553A (en) 1948-02-03 1948-02-03 Improvements in quick-action springs for electrical switching devices

Publications (1)

Publication Number Publication Date
GB647553A true GB647553A (en) 1950-12-13

Family

ID=9753388

Family Applications (1)

Application Number Title Priority Date Filing Date
GB317748A Expired GB647553A (en) 1948-02-03 1948-02-03 Improvements in quick-action springs for electrical switching devices

Country Status (1)

Country Link
GB (1) GB647553A (en)

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