(19)
(11) EP 0 300 696 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.06.1990 Bulletin 1990/24

(43) Date of publication A2:
25.01.1989 Bulletin 1989/04

(21) Application number: 88306493.3

(22) Date of filing: 15.07.1988
(51) International Patent Classification (IPC)4: G10K 7/06, B08B 9/02, F28G 7/00
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 22.07.1987 GB 8717312

(71) Applicant: Jerlin, Rolf Robert
Peterlee Co. Durham SR8 (GB)

(72) Inventor:
  • Jerlin, Rolf Robert
    Peterlee Co. Durham SR8 (GB)

(74) Representative: Virr, Dennis Austin et al
Urquhart-Dykes & Lord St. Nicholas Chambers Amen Corner
Newcastle-Upon-Tyne NE1 1PE
Newcastle-Upon-Tyne NE1 1PE (GB)


(56) References cited: : 
   
       


    (54) Sound generating system


    (57) A sound generating system, suitable among other purposes for keeping boilers and the like free of soot, comprises a sound generator (13), for example a rotary sound generator, which functions by interrupting an air or gas supply at predetermined frequent intervals, at least one resonance tube (18, 19, 20) connected to receive sound pulses produced by the sound generator (13), and, disposed in the connecting line between the sound generator (13) and the or each resonance tube (18, 19, 20), a valve (21, 22, 23) having a straight-through flow passage closable by rotation of a rotary valve member. The system makes it possible to operate several such resonance tubes (18, 19, 20) from a single sound generator (13).










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