Electroacoustic calling device

Details Electroacoustic calling device Electroacoustic calling device

G - Physics

10

K

349/66, 349/67.2

G10K 9/18 (2006.01) G10K 9/12 (2006.01) G10K 9/122 (2006.01)

Patent

CA 1275726

ABSTRACT: An electroacoustic calling device comprises a two part housing (100,101) containing a piezoelectric disc (103) mounted between two knife edges (109,110) and a loudspeaker cone (104) which is attached to the centre of the piezoelectric disc by means of an adhesive. The upper part (101) of the housing has an aper- ture (102) through which sound waves are emitted. A closure member (105) for controlling the size of the aperture and hence the volume of sound emitted is urged against the surface of the housing by means of an arm (107) which is pivotally mounted on a boss (108). The closure member (105) is in the form of a disc which is located in a recess (106) in the arm (107) and is urged against the housing by means of a projection (112) in the recess (106). The essen- tially point contact between the disc and recess allows the disc to align accurately with the surface of the housing.

498357

Affiliated with

Also associated with

Rating

Electroacoustic calling device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electroacoustic calling device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electroacoustic calling device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1278073