(19)
(11) EP 0 437 341 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.09.1992 Bulletin 1992/36

(43) Date of publication A2:
17.07.1991 Bulletin 1991/29

(21) Application number: 91300132.7

(22) Date of filing: 09.01.1991
(51) International Patent Classification (IPC)5: G08B 21/00, A63C 19/00
(84) Designated Contracting States:
BE DE FR GB IT NL

(30) Priority: 10.01.1990 GB 9000553

(71) Applicant: NNC LIMITED
Knutsford Cheshire WA16 8QZ (GB)

(72) Inventor:
  • Hayes, Peter
    Altrincham, Cheshire, WA14 5NZ (GB)

(74) Representative: Hoste, Colin Francis et al
The General Electric Company p.l.c. GEC Patent Department Waterhouse Lane
Chelmsford, Essex CM1 2QX
Chelmsford, Essex CM1 2QX (GB)


(56) References cited: : 
   
       


    (54) Barrier structures


    (57) A crowd control barrier comprising a wall (14), crush barrier (12,13), handrail, fence, etc. has one or more strain gauges (5,6,11) or other sensors (15,16,17) built in,to sense the force applied to the barrier due to crowd pressure. The outputs of the sensors are fed to a central monitoring station (7) where any increase in monitored force can provide a warning of potential danger. Manual or automatic opening or closing of gates can be effected, as a result of the warning, to ease the crowd pressure.






    Search report