GB541121A - Improvements in electric control apparatus - Google Patents
Improvements in electric control apparatusInfo
- Publication number
- GB541121A GB541121A GB930340A GB930340A GB541121A GB 541121 A GB541121 A GB 541121A GB 930340 A GB930340 A GB 930340A GB 930340 A GB930340 A GB 930340A GB 541121 A GB541121 A GB 541121A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- handle
- contactor
- momentary
- closed
- 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
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
541,121. Controllers; momentary contact switches. BRITISH THOMSON-HOUSTON CO., Ltd., and WISE, W. L. May 27, 1940, No. 9303. [Classes 38 (iii) and 38 (v)] A multi-position drum 4 can only be moved from one position to another after the handle 6 has been depressed, thereby opening contacts A and breaking the holding circuit of a line contactor 14. After the handle 6 is released contacts A reclose and contacts B make a momentary closure to energize the coil of the contactor 14. Momentary closure of contacts B ensures no-volt protection, for, after voltage failure, the contactor will not automatically reclose as the contacts B are open. In a modification, the contacts B are closed by an upward movement of the handle 6 beyond its normal position. Momentary closure of contacts B is obtained by connecting the moving contact member to the piston 17 of a dash-pot. When the cylinder 18 is moved upwards the contacts are closed and remain closed until air has escaped from the dash-pot whereupon a spring 16 is able to open the contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB930340A GB541121A (en) | 1940-05-27 | 1940-05-27 | Improvements in electric control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB930340A GB541121A (en) | 1940-05-27 | 1940-05-27 | Improvements in electric control apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB541121A true GB541121A (en) | 1941-11-13 |
Family
ID=9869372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB930340A Expired GB541121A (en) | 1940-05-27 | 1940-05-27 | Improvements in electric control apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB541121A (en) |
-
1940
- 1940-05-27 GB GB930340A patent/GB541121A/en not_active Expired
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