EP 0285427 A3 19890308 - SWITCHING APPARATUS
Title (en)
SWITCHING APPARATUS
Publication
Application
Priority
IE 84887 A 19870402
Abstract (en)
[origin: EP0285427A2] 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.
IPC 1-7
IPC 8 full level
H05B 37/02 (2006.01)
CPC (source: EP US)
H05B 47/105 (2020.01 - EP US); H05B 47/11 (2020.01 - EP); H05B 47/13 (2020.01 - EP US)
Citation (search report)
- [A] GB 2051440 A 19810114 - DUCKWORTH G H
- [A] GB 2052811 A 19810128 - BELL & HOWELL CO
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0285427 A2 19881005; EP 0285427 A3 19890308; IE 870848 L 19881002
DOCDB simple family (application)
EP 88302911 A 19880331; IE 84887 A 19870402