(19)
(11) EP 0 285 427 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.03.1989 Bulletin 1989/10

(43) Date of publication A2:
05.10.1988 Bulletin 1988/40

(21) Application number: 88302911.8

(22) Date of filing: 31.03.1988
(51) International Patent Classification (IPC)4: H05B 37/00, H05B 39/04
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 02.04.1987 IE 84887

(71) Applicant: ANDERSON RESEARCH AND DEVELOPMENT LIMITED
Dublin 18 (IE)

(72) Inventors:
  • Anderson, Francis Joseph
    Dublin 18 (IR)
  • Anderson, John Louis
    Castleknock, County Dublin (IR)

(74) Representative: Barker, Rosemary Anne et al
Barlow, Gillett & Percival 94 Market Street
Manchester M1 1PJ
Manchester M1 1PJ (GB)


(56) References cited: : 
   
       


    (54) Switching apparatus


    (57) Apparatus (7) for switching a filament lamp (2) in a load circuit (1) by short circuiting the load switch (3) of the load circuit (1) comprises a relay (RL1) with contacts (9) to short circuit the switch (3). The apparatus (7) switches on the load circuit (1) in response to an infra-red detector (8) detecting the presence of an intruder within the perimeter of a compound or building. A power circuit (16) comprising a rechargable battery (B1) and storage capacitor (C3) powers the relay (RL1). The power circuit (16) derives its power from the load circuit (1) across the terminals of the switch (3), when the switch (3) is open and the relay contacts (9) are open. In this condition, a battery and storage capacitor in the power circuit (16) are charged.







    Search report