(19)
(11) EP 1 098 282 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.06.2002 Bulletin 2002/25

(43) Date of publication A2:
09.05.2001 Bulletin 2001/19

(21) Application number: 00309852.2

(22) Date of filing: 06.11.2000
(51) International Patent Classification (IPC)7: G08B 13/14
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 06.11.1999 GB 9926208

(71) Applicants:
  • Staplethorne Limited
    Honiton, Devon EX14 8BB (GB)
  • D.C. Drives (Patents) Limited
    Swanage, Dorset BH19 2RS (GB)

(72) Inventors:
  • Williams, Philip Elphee
    Swanage, Dorset, BH19 2RS (GB)
  • Jones, Peter John
    Swanage, Dorset BH19 2RH (GB)
  • Hutcheson, Peter Jonathan
    Exmouth, Devon, EX8 2HT (GB)

(74) Representative: Brown, Michael Stanley 
Alpha and Omega Chine Croft East Hill
Ottery St. Mary Devon EX11 1PJ
Ottery St. Mary Devon EX11 1PJ (GB)

   


(54) Sensor systems


(57) A sensor system is provided for use in detecting movement of an item, e.g. a picture 16, suspended from a wall or other substantially vertical structure, or for detecting movement of an item displayed or stored on a horizontal or inclined surface, the sensor system including a piezoceramic element (22) which is mounted on a metallic disc (23) which, in use, is located between the item (16) and the structure or surface, and means for detecting the generation of an output by the piezoceramic element (22) as a result of deflection of the disc (23) in either of two opposite directions as a result of movement of the item (16).






Search report