GB518395A - Improvements to safety switch mechanism for electric wash boilers and the like - Google Patents
Improvements to safety switch mechanism for electric wash boilers and the likeInfo
- Publication number
- GB518395A GB518395A GB27731/38A GB2773138A GB518395A GB 518395 A GB518395 A GB 518395A GB 27731/38 A GB27731/38 A GB 27731/38A GB 2773138 A GB2773138 A GB 2773138A GB 518395 A GB518395 A GB 518395A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- lever
- arm
- spring
- solder
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
- H05B1/0205—Switches using a fusible material
Landscapes
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Abstract
518,395. Thermal switches. TUCKER & CO., Ltd., J. H., and FUKE, F. C. Sept. 23, 1938, Nos. 27731, and 36384. [Class 38 (v)] In a safety device for an electric wash boiler a switch lever 15, pivoted at 11 and biased by a spring- toggle arrangement to one side or the other of a vertical line through 11, normally bears against one or other arm 9 of a member 6 fixed to a vertical spindle soldered to a support. When the solder melts with overheating, the lever 15 moves fur- 'ther still from its central position into the dotted position shown under the action of the dead centre spring 21, pushing the arm 9 with, it and opening switch contacts. The solder then resets, and to reset the switch the shaft 11 is rotated by hand in a clockwise direction back into the switch-closed position, the lever 15 moving, however, beyond its original position till it engages the other arm 9 of the member and is there held. The spring 21 has during this action moved over its deadcentre and now tends to rotate the lever 15 further in a clockwise direction. The switch is still closed and further rotation to open the contacts only occurs when the solder melts again. The switch may, however, be rotated back by hand to open the circuit. In a modification, Figs. 4, 5 (not shown), the member 6 has a slot within which the lever 15 moves. Specification 496,940 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB27731/38A GB518395A (en) | 1938-09-23 | 1938-09-23 | Improvements to safety switch mechanism for electric wash boilers and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB27731/38A GB518395A (en) | 1938-09-23 | 1938-09-23 | Improvements to safety switch mechanism for electric wash boilers and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB518395A true GB518395A (en) | 1940-02-26 |
Family
ID=10264337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27731/38A Expired GB518395A (en) | 1938-09-23 | 1938-09-23 | Improvements to safety switch mechanism for electric wash boilers and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB518395A (en) |
-
1938
- 1938-09-23 GB GB27731/38A patent/GB518395A/en not_active Expired
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