Global Patent Index - EP 1020844 A2

EP 1020844 A2 2000-07-19 - Whistle

Title (en)

Whistle

Title (de)

Pfeife

Title (fr)

Sifflet

Publication

EP 1020844 A2 (EN)

Application

EP 00300273 A

Priority

GB 9900868 A

Abstract (en)

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. <IMAGE>

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

G10K 5/00

IPC 8 full level (invention and additional information)

G10K 5/00 (2006.01)

CPC (invention and additional information)

G10K 5/00 (2013.01)

Designated contracting state (EPC)

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

DOCDB simple family

EP 1020844 A2 20000719; EP 1020844 A3 20040428