GB1182451A - Improvements relating to Electrical Signalling Systems - Google Patents
Improvements relating to Electrical Signalling SystemsInfo
- Publication number
- GB1182451A GB1182451A GB666167A GB666167A GB1182451A GB 1182451 A GB1182451 A GB 1182451A GB 666167 A GB666167 A GB 666167A GB 666167 A GB666167 A GB 666167A GB 1182451 A GB1182451 A GB 1182451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- energized
- relay
- relays
- lamp
- lines
- 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
- 230000011664 signaling Effects 0.000 title abstract 2
- 239000003245 coal Substances 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/30—Electric signal transmission systems in which transmission is by selection of one or more conductors or channels from a plurality of conductors or channels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
1,182,451. Protective arrangements. JOHN DAVIS & SON (DERBY) Ltd. 5 April, 1968 [11 Feb., 1967], No. 6661/67. Heading H2K. A signalling system comprises two relays F, G connected between lines 6, 7, rectifiers 15, 16, 17, 18 being arranged so that when the voltage on line 6 is alternating or positive with respect to line 7 relay F is energized and when the voltage on line 6 is alternating or negative relay G is energized, and a rectifier 19 which is normally connected across the lines 6, 7 so that when an alternating voltage is applied to terminals 30, 32 relay F is normally energized but when a switch 8, 10 or 12 is operated, the rectifier 19 is disconnected and an oppositely poled rectifier 21, 22 or 23 is connected across the lines 6, 7 so that relay F becomes deenergized and relay G becomes energized. A further relay E is energized only when a unidirectional voltage, of either polarity, exists across the lines 6, 7. Operation.-In use, relays E and F are normally energized and a lamp 24 is on to denote a " clear " state in which a relay H can be manually brought into action by a pushbutton 38 to initiate operation of machinery, e.g. in a coal mine. When relay H is energized, the relays in the circuit are in the positions shown in Fig. 2 and a lamp 25 is on. If now one of the switches 8, 10, 12 is operated, relay F becomes de-energized and relay G becomes energized, whereupon relay H also becomes deenergized to put the controlled machinery in a safe condition. A " lockout " lamp 26 comes on. If an open circuit occurs in the lines 6, 7 all the relays E, F, G, H will be de-energized and an " open " lamp 27 will come on. If a short circuit occurs across the lines 6, 7, relays E and H are de-energized and relays F and G are energized and a "'short-" lamp 28 comes on. If an earth fault occurs to by-pass one of the switches 8, 10, 12 and that switch is operated, both relays F and G are energized whereby relay H becomes de-energized. If the by-pass is of low resistance, relay E will be de-energized and the " short " lamp 28 will come on. If the by-pass is of high resistance relay E will remain energized and a " fault " lamp 29 will come on. Testing.-A switch 54 having ganged contact arms 56, 58, 60 is provided for testing each one of the fire operations " open ", " clear ", " short ", " lockout " and " fault " when in positions a, b, c, d and e respectively. -
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB666167A GB1182451A (en) | 1967-02-11 | 1967-02-11 | Improvements relating to Electrical Signalling Systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB666167A GB1182451A (en) | 1967-02-11 | 1967-02-11 | Improvements relating to Electrical Signalling Systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1182451A true GB1182451A (en) | 1970-02-25 |
Family
ID=9818498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB666167A Expired GB1182451A (en) | 1967-02-11 | 1967-02-11 | Improvements relating to Electrical Signalling Systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1182451A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109872593A (en) * | 2019-02-21 | 2019-06-11 | 卡斯柯信号有限公司 | A kind of electronic simulation for five-wire system exchange goat |
-
1967
- 1967-02-11 GB GB666167A patent/GB1182451A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109872593A (en) * | 2019-02-21 | 2019-06-11 | 卡斯柯信号有限公司 | A kind of electronic simulation for five-wire system exchange goat |
| CN109872593B (en) * | 2019-02-21 | 2023-11-07 | 卡斯柯信号有限公司 | Electronic simulation device for five-wire alternating current switch machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
| PCNP | Patent ceased through non-payment of renewal fee |