GB882876A - Improvements in temperature responsive magnetic snap-action switches - Google Patents

Improvements in temperature responsive magnetic snap-action switches

Info

Publication number
GB882876A
GB882876A GB722759A GB722759A GB882876A GB 882876 A GB882876 A GB 882876A GB 722759 A GB722759 A GB 722759A GB 722759 A GB722759 A GB 722759A GB 882876 A GB882876 A GB 882876A
Authority
GB
United Kingdom
Prior art keywords
blade
contact
acts
contacts
knob
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
GB722759A
Inventor
David Hay Surgeoner
William Frederick French
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.)
Rheostatic Co Ltd
Original Assignee
Rheostatic 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 Rheostatic Co Ltd filed Critical Rheostatic Co Ltd
Priority to GB722759A priority Critical patent/GB882876A/en
Priority to DER27299A priority patent/DE1176736B/en
Priority to FR820066A priority patent/FR1331321A/en
Priority to CH229760A priority patent/CH363068A/en
Publication of GB882876A publication Critical patent/GB882876A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature

Landscapes

  • Thermally Actuated Switches (AREA)
  • Adjustable Resistors (AREA)

Abstract

882,876. Thermal switches. RHEOSTATIC CO. Ltd. Feb. 11, 1960 [March 2, 1959], No. 7227/59. Class 38 (5). A resilient blade 5 carries a contact 3 for co-operation with a fixed contact 1 and a twin armature 4 acted on by a magnet 6. The resiliency of blade 5 tends to open contacts 3 and 1 whilst the arrangement is such that the resultant magnetic force on armature 4 always acts in opposition to the blade 5 and exceeds the force thereof to maintain the contacts normally closed. A thermally-sensitive liquidfilled element 14 is connected to a capsule 13 acting on the end of a lever 16 pivoted at 18. The other end of lever 16 acts on the blade 5 through a sliding stud 21 and at a temperature predetermined by adjustment of pivot 18 by a knob 18a the contacts 1, 3 are snapped open. The mechanical force due to capsule 13 then falls more rapidly than the magnetic force so that the contact 3 attains an equilibrium position and no back stop is necessary to fix the contact gap; thus the possibility of overstressing the blade 5 by undue adjustment of knob 18a is avoided. A screw 10 acts on a stiff spring 7 carrying magnet 6 and serves to adjust the switch differential. Specification 661,242 is referred to.
GB722759A 1959-03-02 1959-03-02 Improvements in temperature responsive magnetic snap-action switches Expired GB882876A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB722759A GB882876A (en) 1959-03-02 1959-03-02 Improvements in temperature responsive magnetic snap-action switches
DER27299A DE1176736B (en) 1959-03-02 1960-02-10 Electric heat switch
FR820066A FR1331321A (en) 1959-03-02 1960-03-01 Magnetic snap-action circuit breaker
CH229760A CH363068A (en) 1959-03-02 1960-03-01 Thermostatic snap-action switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB722759A GB882876A (en) 1959-03-02 1959-03-02 Improvements in temperature responsive magnetic snap-action switches

Publications (1)

Publication Number Publication Date
GB882876A true GB882876A (en) 1961-11-22

Family

ID=9829076

Family Applications (1)

Application Number Title Priority Date Filing Date
GB722759A Expired GB882876A (en) 1959-03-02 1959-03-02 Improvements in temperature responsive magnetic snap-action switches

Country Status (3)

Country Link
CH (1) CH363068A (en)
DE (1) DE1176736B (en)
GB (1) GB882876A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0452750A2 (en) * 1990-04-18 1991-10-23 Eaton Corporation Remotely setting thermostatic switch assembly and refrigeration system employing same
EP0580810A1 (en) * 1991-04-19 1994-02-02 Robertshaw Controls Company Temperature operated switch construction

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1269701B (en) * 1965-02-02 1968-06-06 Platte & Co Electric snap switch with magnetically switchable contact arm and adjustable actuation path

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE486196A (en) * 1947-12-09
BE495495A (en) * 1949-05-04

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0452750A2 (en) * 1990-04-18 1991-10-23 Eaton Corporation Remotely setting thermostatic switch assembly and refrigeration system employing same
EP0452750A3 (en) * 1990-04-18 1992-08-19 Eaton Corporation Remotely setting thermostatic switch assembly and refrigeration system employing same
EP0580810A1 (en) * 1991-04-19 1994-02-02 Robertshaw Controls Company Temperature operated switch construction
EP0580810A4 (en) * 1991-04-19 1994-04-06 Robertshaw Controls Company

Also Published As

Publication number Publication date
CH363068A (en) 1962-07-15
DE1176736B (en) 1964-08-27

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