GB649833A - Improvements in safety switches for electric heating elements - Google Patents

Improvements in safety switches for electric heating elements

Info

Publication number
GB649833A
GB649833A GB1204548A GB1204548A GB649833A GB 649833 A GB649833 A GB 649833A GB 1204548 A GB1204548 A GB 1204548A GB 1204548 A GB1204548 A GB 1204548A GB 649833 A GB649833 A GB 649833A
Authority
GB
United Kingdom
Prior art keywords
helix
electric heating
heating elements
kettle
safety switches
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
GB1204548A
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.)
FREDRIC LAFARGUE BEST
BEST PRODUCTS Ltd
Original Assignee
FREDRIC LAFARGUE BEST
BEST PRODUCTS 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 FREDRIC LAFARGUE BEST, BEST PRODUCTS Ltd filed Critical FREDRIC LAFARGUE BEST
Priority to GB1204548A priority Critical patent/GB649833A/en
Publication of GB649833A publication Critical patent/GB649833A/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
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/56—Thermally-sensitive members actuated due to deflection of bimetallic element having spirally wound or helically wound bimetallic element

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cookers (AREA)

Abstract

649,833. Thermal switches. BEST PRODUCTS, Ltd., and BEST, F. L. May 3, 1948, No. 12045. [Class 38(v)] A kettle or other electrically heated device is provided with a bimetal helix 24 which rotates and opens a switch on over-heating. The helix is enclosed in a casing 21 to the bottom of which it is secured by means of a ferrule 22. The ferrule enters the lower end of the helix and the two parts are clinched together by pressure applied to the outside of the casing 21 which is soldered to the arms 11, 12 of the heater. The upper end of the helix has a shank 25 fixed to it by a pin 26, the shank carrying an arm 27 which engages a spring 30 carrying a movable contact 31 as shown in Fig. 2. Contacts 31, 32 are separated if the kettle attains a temperature above that of boiling water.
GB1204548A 1948-05-03 1948-05-03 Improvements in safety switches for electric heating elements Expired GB649833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1204548A GB649833A (en) 1948-05-03 1948-05-03 Improvements in safety switches for electric heating elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1204548A GB649833A (en) 1948-05-03 1948-05-03 Improvements in safety switches for electric heating elements

Publications (1)

Publication Number Publication Date
GB649833A true GB649833A (en) 1951-02-07

Family

ID=9997432

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1204548A Expired GB649833A (en) 1948-05-03 1948-05-03 Improvements in safety switches for electric heating elements

Country Status (1)

Country Link
GB (1) GB649833A (en)

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