(19)
(11) EP 1 020 844 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.04.2004 Bulletin 2004/18

(43) Date of publication A2:
19.07.2000 Bulletin 2000/29

(21) Application number: 00300273.0

(22) Date of filing: 17.01.2000
(51) International Patent Classification (IPC)7: G10K 5/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 16.01.1999 GB 9900868

(71) Applicant: J. Hudson & Co. (Whistles) Ltd
Hockley, Birmingham B19 2HA (GB)

(72) Inventors:
  • Topman, Simon Manville
    Sutton Coldfield, West Midlands B74 4HP (GB)
  • Sharp, Michael Colin
    Solihull, West Midlands B90 1QR (GB)

(74) Representative: Parker, Nigel Edward 
N E Parker & Co The Annex Tameway Tower Bridge Street
Walsall, West Midlands WS1 1QD
Walsall, West Midlands WS1 1QD (GB)

   


(54) Whistle


(57) A whistle (1), particularly a sports whistle, which is generally in the shape of a mandolin and has two whistle element sound chambers (2,3) arranged side-by-side and each having a cross section which is asymmetrical, preferably part-circular and part square. The sound chambers (2,3) are arranged so that the blowing pressure required to generate a sound pressure level of 90DbA and a maximum frequency of about 3.9KHz is only 0.5 p.s.i. The sound chambers (2,3) are separated from one another at each air vent (4,5) by a fin (F) of generally narrow width, and the entrance to each sound chamber is defined in part by a respective inclined inner wall (10,11) near the central longitudinal axis of the whistle.






Search report