Global Patent Index - EP 1082822 A1

EP 1082822 A1 2001-03-14 - Signalling method and apparatus

Title (en)

Signalling method and apparatus

Title (de)

Signalisierungsverfahren und Vorrichtung

Title (fr)

Procédé et appareil de signalisation

Publication

EP 1082822 A1 (EN)

Application

EP 00912757 A

Priority

  • GB 0001028 W
  • GB 9907006 A

Abstract (en)

[origin: WO0059127A1] A signalling system is disclosed, comprising a DC power source, a power drain, a cable interconnecting the source and drain, including at least two cores, a signal generator, and a signal receiver; the signal generator being adapted to modulate the power output of the source in dependence on the signal to be transmitted, the signal receiver comprising a comparator adapted to compare the instantaneous power output of the source with a historical average power output thereby to detect the signal. Such a system is reliable in an electrically noisy environment, can be provided at relatively low cost, and can be installed easily and without complexity.

IPC 1-7 (main, further and additional classification)

H04B 3/54; H02J 13/00

IPC 8 full level (invention and additional information)

H02J 13/00 (2006.01); H04B 3/54 (2006.01)

CPC (invention and additional information)

H02J 13/0003 (2013.01); H04B 3/548 (2013.01); H04B 2203/5416 (2013.01); H04B 2203/547 (2013.01)

Citation (search report)

See references of WO 0059127A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0059127 A1 20001005; AU 3440800 A 20001016; CA 2333531 A1 20001005; CN 1220338 C 20050921; CN 1310891 A 20010829; EP 1082822 A1 20010314; GB 2352149 A 20010117; GB 2352149 B 20031022; GB 9907006 D0 19990519

INPADOC legal status


2007-06-20 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20061228

2006-09-13 [RTI1] TITLE (CORRECTION)

- Free text: SIGNALLING METHOD AND APPARATUS

2001-03-14 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001127

2001-03-14 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-03-14 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI