GB1296539A - - Google Patents

Info

Publication number
GB1296539A
GB1296539A GB1296539DA GB1296539A GB 1296539 A GB1296539 A GB 1296539A GB 1296539D A GB1296539D A GB 1296539DA GB 1296539 A GB1296539 A GB 1296539A
Authority
GB
United Kingdom
Prior art keywords
lamp
energized
main
emergency
battery
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
Application number
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1296539A publication Critical patent/GB1296539A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

1296539 Emergency lighting systems SOC DES ACCUMULATEURS FIXES ET DE TRACTION 29 Dec 1970 [24 Dec 1969] 62946/69 Heading H2H An emergency lighting system comprises a plurality of lighting units 1, 2, 3, each connected to an A.C. supply by way of a main switch 4 and a control switch 5, each of the lighting units including a main lamp 7 and an emergency lamp 15, the arrangement being such that when the A.C. supply exists the main lamps 7 are illuminated and when the A.C. supply has failed the emergency lamps 15 are energized by a battery 14. With a control switch 5 and a main switch 4 closed, the main lamps 7 are energized and a relay coil 9 energized by way of a resistor 12 and a capacitor 10 in parallel and a rectifier 11. The output terminals of the rectifier 11 are connected to the battery 14, thereby providing a trickle charge for the battery, the emergency lamp 15 being de-energized since the contacts 16 of the relay are open when the coil 9 is energized. An impedance 13 is connected in parallel with the coil 9, capacitor 10 and resistor 12 to allow an increase in the trickle charge current without increasing the current through the coil 9. When the A.C. supply fails the coil 9 de-energizes, contacts 16 close and the emergency lamp 15 is energized by the battery 14, thereby replacing the illumination of the main lamp 7. The operation of the emergency lamp 15 can be retained when the main lamp 7 is not in use by opening the switch 5 in which case the lighting units 1, 2, 3 are supplied with half wave rectified A.C. which permits charging of the battery 14 but, since the capacitor 8 charges, the lamp 7 is not supplied.
GB1296539D 1969-12-24 1969-12-24 Expired GB1296539A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6294669 1969-12-24

Publications (1)

Publication Number Publication Date
GB1296539A true GB1296539A (en) 1972-11-15

Family

ID=10488649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1296539D Expired GB1296539A (en) 1969-12-24 1969-12-24

Country Status (2)

Country Link
FR (1) FR2074172A5 (en)
GB (1) GB1296539A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040339A1 (en) * 1980-05-17 1981-11-25 Dieter Christiansen A centrally controlled lighting installation having a plurality of individually-switchable individual light points, central switch elements and individual light switches therefor
GB2146859A (en) * 1983-09-13 1985-04-24 Black & Decker Inc Battery recharging circuit with indicator means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040339A1 (en) * 1980-05-17 1981-11-25 Dieter Christiansen A centrally controlled lighting installation having a plurality of individually-switchable individual light points, central switch elements and individual light switches therefor
GB2146859A (en) * 1983-09-13 1985-04-24 Black & Decker Inc Battery recharging circuit with indicator means

Also Published As

Publication number Publication date
FR2074172A5 (en) 1971-10-01

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees