GB464434A - Improvements in or relating to double thermal switches - Google Patents
Improvements in or relating to double thermal switchesInfo
- Publication number
- GB464434A GB464434A GB2884735A GB2884735A GB464434A GB 464434 A GB464434 A GB 464434A GB 2884735 A GB2884735 A GB 2884735A GB 2884735 A GB2884735 A GB 2884735A GB 464434 A GB464434 A GB 464434A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- switch
- strips
- heater
- closed
- 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
- H01H37/10—Compensation for variation of ambient temperature or pressure
Landscapes
- Resistance Heating (AREA)
- Electric Stoves And Ranges (AREA)
Abstract
464,434. Thermal switches. BRITISH THOMSON-HOUSTON CO., Ltd., and RULE, W. Oct. 18, 1935, No. 28847. [Class 38 (v)] [Also in Group XIII] Circuits 13, 14 containing lamp filaments or other consuming devices (not shown) are alternately closed by successive actuations of a switch 2 through the medium of a device comprising two bimetallic strips 6, 7 which are heated by conductors 3, 4 and are adapted tc make contact alternately with a strip 10 arranged between them. The strips 6, 7 are each made of two portions oppositely directed so that variations of ambieni temperature are compensated for and the portion 9 of each strip opposite the heater 3 or 4 is dulled while the remaining portion 8 is brightened. When the switch 2 is closed a circuit is completed through both heaters 3 and 4 and the strips 6, 7 bend towards each other till one strip, the strip 6 in the figure, engages the strip 10. This closes the circuit 13 and short-circuits the heater 4 so that the strip 7 cools, but the heating of the strip 6 continues and this bends further to the left carrying the strip 10, which is non-resilient, with it. When the switch 2 is opened, the strip 10 is thus left nearer the strip 7 so that when the switch 2 is again closed, and the strips 6, 7 again bend towards each other, the strip 7 will now be the first to engage the strip 10, and short circuit the heater 3 through the lamp filament in the conductor 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2884735A GB464434A (en) | 1935-10-18 | 1935-10-18 | Improvements in or relating to double thermal switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2884735A GB464434A (en) | 1935-10-18 | 1935-10-18 | Improvements in or relating to double thermal switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB464434A true GB464434A (en) | 1937-04-19 |
Family
ID=10282105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2884735A Expired GB464434A (en) | 1935-10-18 | 1935-10-18 | Improvements in or relating to double thermal switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB464434A (en) |
-
1935
- 1935-10-18 GB GB2884735A patent/GB464434A/en not_active Expired
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