GB632909A - Improvements relating to switch-operated electric lighting and signalling systems - Google Patents
Improvements relating to switch-operated electric lighting and signalling systemsInfo
- Publication number
- GB632909A GB632909A GB34247/47A GB3424747A GB632909A GB 632909 A GB632909 A GB 632909A GB 34247/47 A GB34247/47 A GB 34247/47A GB 3424747 A GB3424747 A GB 3424747A GB 632909 A GB632909 A GB 632909A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- circuit
- lighting
- pilot
- line
- 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 3
- 230000008878 coupling Effects 0.000 abstract 4
- 238000010168 coupling process Methods 0.000 abstract 4
- 238000005859 coupling reaction Methods 0.000 abstract 4
- 238000004804 winding Methods 0.000 abstract 4
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/005—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for remote controlled apparatus; for lines connecting such apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B19/00—Mining-hoist operation
- B66B19/06—Applications of signalling devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
632,909. Protective cut-out arrangements. VICTOR PRODUCTS (WALLSEND), Ltd., and MANN, R. W. Dec. 24, 1947, No. 34247. [Class 38 (v)] [Also in Group XXXVIII] In an underground lighting and signalling system cornprising a number of lighting fittings connected together by cables with detachable couplings, and signalling switches arranged to control the lights, the switches are arranged in series in a low-voltage pilot circuit containing a relay or contactor, which interrupts the lighting circuit when the continuity of the pilot circuit is broken by operating a switch or by a fault. A further relay is provided to cause the interruption of the pilot and lighting circuits in the event of an earth fault on the lighting circuit, and the arrangement is such that the lighting circuit cannot be closed until all the couplings have been assembled. Fig. 1 shows one of a number of lighting fittings 35 with switches 42, supplied from a transformer 6 by means of a five-cored cable having cores 29, 30 energized by a centre-tapped. secondary winding 10, a core 31 connected to the core, 29 by a final coupling or shorting cap 47, a pilot line 32 and an earth continuity line or core 33, which is connected to the line 32 by the coupling 47. When the pilot circuit is complete the relay or contactor 8 is energized by a low voltage secondary winding 18 on the transformer 6, and closes its contacts 11 ... 14 to complete the circuit for the lamps 52. The opening of a switch 42 or the breakage of the pilot line 32 or earth line 33 de-energizes the relay 8 to open the lighting circuit. The centre-tapping of the winding 10 is connected to earth through the winding of a relay 9, which has its normally closed contacts 21, 22, 24 connected in series with the pilot circuit. Hence on the occurrence of an earth fault on the lines 29 ... 31, the relay 9 is energized and opens its contacts to interrupt the pilot circuit so causing contactor 8 to open the lighting circuit, the relay 9 being held open until reset manually, by a latch 54 which engages a detent 55 in the armature 25 of the relay.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB34247/47A GB632909A (en) | 1947-12-24 | 1947-12-24 | Improvements relating to switch-operated electric lighting and signalling systems |
| FR976517D FR976517A (en) | 1947-12-24 | 1948-12-15 | Improvements to switch-operated lighting and signaling systems |
| BE486389A BE486389A (en) | 1947-12-24 | 1948-12-18 | |
| DEP26125A DE820719C (en) | 1947-12-24 | 1948-12-23 | Electric lighting and signaling system for underground work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB34247/47A GB632909A (en) | 1947-12-24 | 1947-12-24 | Improvements relating to switch-operated electric lighting and signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB632909A true GB632909A (en) | 1949-12-05 |
Family
ID=10363265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34247/47A Expired GB632909A (en) | 1947-12-24 | 1947-12-24 | Improvements relating to switch-operated electric lighting and signalling systems |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE486389A (en) |
| DE (1) | DE820719C (en) |
| FR (1) | FR976517A (en) |
| GB (1) | GB632909A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE967211C (en) * | 1951-05-20 | 1957-11-07 | Lehner Fernsprech Signal | Firedamp-proof light, in particular a stray light |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE950266C (en) * | 1952-07-27 | 1956-10-04 | Elektro App Kom Ges Gothe & Co | Signal closure of a face lighting system |
-
1947
- 1947-12-24 GB GB34247/47A patent/GB632909A/en not_active Expired
-
1948
- 1948-12-15 FR FR976517D patent/FR976517A/en not_active Expired
- 1948-12-18 BE BE486389A patent/BE486389A/fr unknown
- 1948-12-23 DE DEP26125A patent/DE820719C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE967211C (en) * | 1951-05-20 | 1957-11-07 | Lehner Fernsprech Signal | Firedamp-proof light, in particular a stray light |
Also Published As
| Publication number | Publication date |
|---|---|
| BE486389A (en) | 1949-01-15 |
| DE820719C (en) | 1951-11-12 |
| FR976517A (en) | 1951-03-19 |
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