GB172440A - Improvements in and relating to means for controlling electric switches - Google Patents
Improvements in and relating to means for controlling electric switchesInfo
- Publication number
- GB172440A GB172440A GB2688920A GB2688920A GB172440A GB 172440 A GB172440 A GB 172440A GB 2688920 A GB2688920 A GB 2688920A GB 2688920 A GB2688920 A GB 2688920A GB 172440 A GB172440 A GB 172440A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- series
- switches
- contacts
- arrangement
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/54—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting two or more dynamo-electric motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
- Control Of Multiple Motors (AREA)
Abstract
172,440. British Thomson - Houston Co., Ltd., (General Electric Co.). Sept. 21, 1920. Sparking, preventing.-Two or more electromagnetic switches in series are employed to connect electric apparatus to a supply circuit, arrangements being made whereby the switches must be closed successively in a determined order and the closure of the last switch breaks the operating-circuit of the remainder. The object is to ensure that one switch shall remain in a working condition even if excessive sparking and fusing together of the contacts should take place at another switch of the series. In the arrangement shown in Fig. 1, a supply circuit 12 is connected to motors 10, 11 by means of two electromagnetically operated switches 13, 14 disposed in series and controlled by a subsidiary switch 15, a two-way push-button 16, and interlocking contacts 20, in such a manner that the switch 13 closes before the switch 14. In a modified arrangement the interlocking contacts 2 are replaced by a shunt resistance in the control circuit, which serves the same purpose. In either arrangement, after the switch 13 has been opened, as by the action of overload relays 17, 18, 19, it cannot be reclosed until the switch 14 has been opened also.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2688920A GB172440A (en) | 1920-09-21 | 1920-09-21 | Improvements in and relating to means for controlling electric switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2688920A GB172440A (en) | 1920-09-21 | 1920-09-21 | Improvements in and relating to means for controlling electric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB172440A true GB172440A (en) | 1921-12-15 |
Family
ID=10250777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2688920A Expired GB172440A (en) | 1920-09-21 | 1920-09-21 | Improvements in and relating to means for controlling electric switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB172440A (en) |
-
1920
- 1920-09-21 GB GB2688920A patent/GB172440A/en not_active Expired
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