GB494021A - Improvements in, or relating to, multipole automatic switches - Google Patents
Improvements in, or relating to, multipole automatic switchesInfo
- Publication number
- GB494021A GB494021A GB1161637A GB1161637A GB494021A GB 494021 A GB494021 A GB 494021A GB 1161637 A GB1161637 A GB 1161637A GB 1161637 A GB1161637 A GB 1161637A GB 494021 A GB494021 A GB 494021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- causes
- actuate
- bar
- overload
- 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
- H01H71/40—Combined electrothermal and electromagnetic mechanisms
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
494,021. Partly - electromagnetic switches. CRABTREE & CO., Ltd., J. A. (Schiele Industriewerke) April 23, 1937, No. 11616. [Class 38 (v)] In a multi-pole overload switch a housing a is divided into chambers c, d, e, corresponding, e.g. to the three phases of a three-phase supply, and each chamber contains a coil i which serves to heat a thermal element h, to energize an electromagnet m and to generate a magnetic blow-out field for switch contacts v, t. A moderate overload causes one or more of the thermal strips h to bend to the right and actuate a bar to cause contacts g in a holding circuit to open, which in turn causes the contacts u to move away from the fixed contacts 8. An excessively high overload causes one or more armatures n to be rotated about its pivot o by its magnet m and to actuate a bar l which similarly causes the contacts g to open.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DESCH112215D DE741162C (en) | 1937-03-02 | 1937-03-02 | Multi-pole release box with chambers thermally insulated from one another by transverse dividing walls |
| GB1161637A GB494021A (en) | 1937-04-23 | 1937-04-23 | Improvements in, or relating to, multipole automatic switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1161637A GB494021A (en) | 1937-04-23 | 1937-04-23 | Improvements in, or relating to, multipole automatic switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB494021A true GB494021A (en) | 1938-10-19 |
Family
ID=9989521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1161637A Expired GB494021A (en) | 1937-03-02 | 1937-04-23 | Improvements in, or relating to, multipole automatic switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB494021A (en) |
-
1937
- 1937-04-23 GB GB1161637A patent/GB494021A/en not_active Expired
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