GB249130A - Improvements in and relating to electric thermal responsive devices - Google Patents
Improvements in and relating to electric thermal responsive devicesInfo
- Publication number
- GB249130A GB249130A GB6736/26A GB673626A GB249130A GB 249130 A GB249130 A GB 249130A GB 6736/26 A GB6736/26 A GB 6736/26A GB 673626 A GB673626 A GB 673626A GB 249130 A GB249130 A GB 249130A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- annulus
- strip
- core
- alternating current
- 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
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
Landscapes
- Electromagnets (AREA)
- General Induction Heating (AREA)
Abstract
249,130. British Thomson-Houston Co., Ltd., (Assignees of Traver, O. C.). March 11, 1925, [Convention date]. Switches partly electromagnetic; t h e r m a l switches. -- The thermal element of a thermal switch is heated by the current induced in it by a varying magnetic field produced e.g. by an alternating current. According to the arrangement shown in Fig. 1, the bi-metallic strip 10 has the shape of an annulus which surrounds the core 11 of the electromagnet 15. When the magnet 15 is energized by an alternating current, induced currents circulate round the annulus, heating the strip and causing a contact 13 carried by it to engage a contact 14. This action is assisted by magnetic attraction between the bi-metallic strip 10 which is of magnetic material and an adjustable pole-piece 21, a magnetic insulator 17 serving to produce free poles above and below it. Further adjustment is obtained by moving a plug 18 and pin 19 of magnetic material, up or down. In a modification, the bi-metallic member is in the form of a hollow rectangle surrounding the core.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14829A US1692474A (en) | 1925-03-11 | 1925-03-11 | Electrothermal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB249130A true GB249130A (en) | 1926-11-18 |
Family
ID=21767979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6736/26A Expired GB249130A (en) | 1925-03-11 | 1926-03-10 | Improvements in and relating to electric thermal responsive devices |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1692474A (en) |
| BE (1) | BE249130A (en) |
| GB (1) | GB249130A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2513160A (en) * | 1945-10-02 | 1950-06-27 | Rca Corp | Transformer |
| US2628269A (en) * | 1947-09-26 | 1953-02-10 | Charles L Stroup | Circuit interrupter |
| US2522269A (en) * | 1948-06-30 | 1950-09-12 | Fred J Hart | Electrical therapeutic device |
| US2717364A (en) * | 1951-02-05 | 1955-09-06 | Collins Radio Co | Temperature compensation of permeability tuned circuits |
| US2824922A (en) * | 1953-05-11 | 1958-02-25 | Westinghouse Electric Corp | Circuit control device |
| US2839633A (en) * | 1954-07-28 | 1958-06-17 | Gen Motors Corp | Circuit breaking device |
-
0
- BE BE249130D patent/BE249130A/xx unknown
-
1925
- 1925-03-11 US US14829A patent/US1692474A/en not_active Expired - Lifetime
-
1926
- 1926-03-10 GB GB6736/26A patent/GB249130A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1692474A (en) | 1928-11-20 |
| BE249130A (en) |
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