GB683431A - Improvements in or relating to electromagnetic devices - Google Patents
Improvements in or relating to electromagnetic devicesInfo
- Publication number
- GB683431A GB683431A GB1563250A GB1563250A GB683431A GB 683431 A GB683431 A GB 683431A GB 1563250 A GB1563250 A GB 1563250A GB 1563250 A GB1563250 A GB 1563250A GB 683431 A GB683431 A GB 683431A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pole
- permanent magnet
- caps
- pole caps
- june
- 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
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Abstract
683,431. Electromagnetic switches. TELEPHONE MANUFACTURING CO., Ltd. June 13,1951 [June 22, 1950], No. 15632/50. Class 38 (v) [Also in Group XXXV] The driving device for an electromagnetic switch, particularly one having a plurality of contact spring sets, comprises an electromagnet with a coil 11 and two polepieces 10c, 10d, a permanent magnet 12a between the pole pieces, and two soft iron pole caps 12b each mounted near one pole of the permanent magnet and rotatable between the pole pieces 10c, 10d. The permanent magnet is stationary and the pole caps 12b are connected by brackets which rotate about the spindle 13. The arrangement can be such that the pole caps have an unstable or a stable central position, this depending on the length of the pole caps. The form shown has an unstable central position and the rotor normally rests with the pole caps engaging stops formed by a bracket 14. A current impulse of suitable direction moves the rotor into its other position. The driving device may drive a cam shaft through a pawl and ratchet drive and so operate the contact spring sets. A reduction gear may be used so that two or more impulses are required to effect a switch operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1563250A GB683431A (en) | 1950-06-22 | 1950-06-22 | Improvements in or relating to electromagnetic devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1563250A GB683431A (en) | 1950-06-22 | 1950-06-22 | Improvements in or relating to electromagnetic devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB683431A true GB683431A (en) | 1952-11-26 |
Family
ID=10062641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1563250A Expired GB683431A (en) | 1950-06-22 | 1950-06-22 | Improvements in or relating to electromagnetic devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB683431A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2175144A (en) * | 1985-04-13 | 1986-11-19 | Seiji Yamamoto | Magnetically operated actuator |
| EP1180778A1 (en) * | 2000-08-18 | 2002-02-20 | Ranco Incorporated of Delaware | Tristable relay |
-
1950
- 1950-06-22 GB GB1563250A patent/GB683431A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2175144A (en) * | 1985-04-13 | 1986-11-19 | Seiji Yamamoto | Magnetically operated actuator |
| GB2175144B (en) * | 1985-04-13 | 1989-11-22 | Seiji Yamamoto | Magnetically operated actuator |
| EP1180778A1 (en) * | 2000-08-18 | 2002-02-20 | Ranco Incorporated of Delaware | Tristable relay |
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