Patent ID: 9589429
Date: 2017-03-07
CPC Classifications: G08B

Claim:
1. An alarm detector base, comprising: an alarm sounder, having a sound-making end; and a sound amplification component having at least one horn channel, the at least one horn channel including a throat end and an outlet end, the throat end disposed corresponding to the sound-making end of said alarm sounder, wherein each horn channel is disposed to extend along a radial direction perpendicular to an axis of said alarm detector base, and is in a horn shape on a radial section, and a plurality of grills located at the outlet end of each horn channel to divide the outlet end of the respective horn channel into a plurality of sub-outlets, wherein each sub-outlet defined by a respective grill has a horn shape providing a straight-line path through the respective grill along the radial direction and having (a) a first width in a first direction perpendicular to the radial direction and (b) second width in a second direction perpendicular to the first direction and tangential to the radial direction, wherein both the first width and second width of the respective sub-outlet increase along the radial direction from an inlet end of the sub-outlet to an outlet end of the sub-outlet to amplify sound from the alarm sounder.