GB590584A - Improvements in electro-magnetic switching devices - Google Patents
Improvements in electro-magnetic switching devicesInfo
- Publication number
- GB590584A GB590584A GB505145A GB505145A GB590584A GB 590584 A GB590584 A GB 590584A GB 505145 A GB505145 A GB 505145A GB 505145 A GB505145 A GB 505145A GB 590584 A GB590584 A GB 590584A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- winding
- spring
- contact
- raises
- 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
- 238000004804 winding Methods 0.000 abstract 3
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
- H01H71/24—Electromagnetic mechanisms
- H01H71/26—Electromagnetic mechanisms with windings acting in opposition
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
590,584. Electromagnetic switches. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and WATKINS, L. G. Feb. 28, 1945, No. 5051. [Class 38 (v)] An electromagnetic switch has two windings 9, 10 connected in parallel and acting in opposition, the winding 9 having in series with it a resistance 37 which increases in value when heated so that after a time interval, the winding 10 sufficiently overpowers the winding 9 to operate the switch. The switch shown is responsive to a protracted overload, the armature 12 then moving so that a projection 14 raises a contact spring 15. The co-operating contact 25 follows to start with but eventually the end 27 of a spring-biassed lever 28 slips under the bent-round end of the spring 15 (Fig. 4) and raises it quickly out of engagement with the contact 25 thus breaking the circuit both of the load and of the coils 9, 10. The switch is reset by pressing a plunger 32 which engages the lever 28.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB590584A true GB590584A (en) | 1947-07-22 |
Family
ID=1628193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB505145A Expired GB590584A (en) | 1945-02-28 | Improvements in electro-magnetic switching devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB590584A (en) |
-
1945
- 1945-02-28 GB GB505145A patent/GB590584A/en not_active Expired
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