GB297895A - Improvements relating to electro-responsive indicating apparatus - Google Patents
Improvements relating to electro-responsive indicating apparatusInfo
- Publication number
- GB297895A GB297895A GB1771027A GB1771027A GB297895A GB 297895 A GB297895 A GB 297895A GB 1771027 A GB1771027 A GB 1771027A GB 1771027 A GB1771027 A GB 1771027A GB 297895 A GB297895 A GB 297895A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- contacts
- circuit breaker
- circuit
- connections
- 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
- H01H9/0066—Auxiliary contact devices
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
297,895. British Thomson-Houston Co., Ltd., and Lawes, W. H. July 4, 1927. Moving coil and wound armature indicators; tell-tale apparatus .-A two-position indicator, more particularly for indicating the positions of a circuit breaker, comprises a magnetizable member which is adapted to be moved to two positions alternately by closing the same circuit in succession. As shown in Fig. 1, a magnetizable member 4 is pivotally mounted in the field of an electromagnet or permanent magnet 3 and carries a coil 9 which may be wound round the member 4 or, as shown on a magnetic extension 10. The coil is connected to brushes 13, 14 which are fixed relatively to the member 4 and are adapted to co-operate with fixed contacts 16, 17, 18 connected in circuit with the operating contact 20 and a circuit breaker 21. When the circuit breaker changes its position, the coil 9 is excited by the momentary closure of the contacts 20 and the member 4 is magnetized and, by the repulsive action of the pole piece 7, is thrown over to its other extreme position adjacent the pole piece 8. During operation the connections to the coil 9 are reversed to prepare the apparatus for operation to its original position upon a subsequent change of position of the circut breaker. Stops 11, 12 are provided for limiting the movement of the bar 4. Fig. 2 shows a modification wherein the member 4 is pivoted centrally and the connections to the exciting coil 9 are made either at contacts 28 or 29 according to the position of the member 4. Any suitable form of indicating means may be associated with the apparatus. For example, an indicator of the " minnie " two-bar type, in which a movable line is shown in the gap of or out of alignment with a broken line may be employed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1771027A GB297895A (en) | 1927-07-04 | 1927-07-04 | Improvements relating to electro-responsive indicating apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1771027A GB297895A (en) | 1927-07-04 | 1927-07-04 | Improvements relating to electro-responsive indicating apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB297895A true GB297895A (en) | 1928-10-04 |
Family
ID=10099836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1771027A Expired GB297895A (en) | 1927-07-04 | 1927-07-04 | Improvements relating to electro-responsive indicating apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB297895A (en) |
-
1927
- 1927-07-04 GB GB1771027A patent/GB297895A/en not_active Expired
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