GB594854A - Improvements in or relating to thermostatically operated electrical switching devices - Google Patents
Improvements in or relating to thermostatically operated electrical switching devicesInfo
- Publication number
- GB594854A GB594854A GB1692645A GB1692645A GB594854A GB 594854 A GB594854 A GB 594854A GB 1692645 A GB1692645 A GB 1692645A GB 1692645 A GB1692645 A GB 1692645A GB 594854 A GB594854 A GB 594854A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arm
- switch
- spring
- relating
- cam
- 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
- 239000011435 rock Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
- H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
- H01H35/2614—Means for adjustment of "ON" or "OFF" operating pressure by varying the bias on the pressure sensitive element
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Thermally Actuated Switches (AREA)
Abstract
594,854. Thermal switches. BRITISH THERMOSTAT CO., Ltd., and SHERLOCK, J. E. July 3, 1945, No. 16926. [Class 38(v)] The operating temperature of a fluidbellows type thermal switch is adjustable by a rotatable knob 27 carrying a cam 25, Fig. 4, which bears on a lever 22 which rocks about a pivot 23, so as to adjust the tension of an opening spring 15 carried by a screw 16 freely mounted in a bush 17 on a switch-arm 10, the initial tension of the spring 15 being pre-set by the screw 16. The arm 10 is movable about a pivot 11 on expansion of the bellows 5, so as to bridge terminals 14 with a spring-loaded contactplate 13 bearing on a knife-edge 33 formed on a stud 32. A snap-action is imparted by a permanent-magnet 35. When the end 29 of the cam 25 engages the lever 22, a part 30 thereon lifts the switch-arm 10 and holds the contacts open irrespective of temperature variations.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US639373A US2446961A (en) | 1945-07-03 | 1946-01-05 | Thermostatically operated electrical switching device |
| FR920025D FR920025A (en) | 1945-07-03 | 1946-01-14 | Improvements made to thermostatically actuated electrical switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB594854A true GB594854A (en) | 1947-11-20 |
Family
ID=1732686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1692645A Expired GB594854A (en) | 1945-07-03 | 1945-07-03 | Improvements in or relating to thermostatically operated electrical switching devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB594854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2260029A (en) * | 1991-09-30 | 1993-03-31 | Gec Alsthom South Africa | Electrical switch |
-
1945
- 1945-07-03 GB GB1692645A patent/GB594854A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2260029A (en) * | 1991-09-30 | 1993-03-31 | Gec Alsthom South Africa | Electrical switch |
| GB2260029B (en) * | 1991-09-30 | 1995-08-30 | Gec Alsthom South Africa | Electrical switch |
| AU662762B2 (en) * | 1991-09-30 | 1995-09-14 | Gec Alsthom South Africa (Proprietary) Limited | Electrical switch |
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