GB649833A - Improvements in safety switches for electric heating elements - Google Patents
Improvements in safety switches for electric heating elementsInfo
- 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
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.
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) |
-
1948
- 1948-05-03 GB GB1204548A patent/GB649833A/en not_active Expired
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