US1941233A - Megaphone - Google Patents

Description

H. L. STALEY Dec. 26, 11933.

MEGAPHONE Filed March '7, 1932 INVENTOR.

Patented Dec. 26', 1933 attias 7':

Q1932: sesame. .597.165

e ali ns; 01. meat?) My improvement relates to means for conducting all the sounds of the voice emitted from both the mouth and nose into the megaphone so that it will produce clearer and louder amplification. In types of megaphones heretoforeproduced,

the receiving end into which the voice is intro-' duced has been shaped to cover onlythe mouth. Such an arrangement eliminates entirelyfrom the amplifying chamber the resonant sounds of the nasal cavity and these sounds I have found are necessary to the proper amplification of the voice.

In my experimentation, have discovered that.

in normal position the receiving end of the megaphone should beheld closely over the mouth and, that by introducing into the megaphone the sounds projected by the nose while in this posipallet and robs the amplified voice of its true ing end of the megaphone.

power and clarity. 7

It is therefore the object of my invention to produce a megaphone into which the sounds from both the mouth and nose shall be introduced simultaneously in such a manner that there shall be no loss to the force of the sound waves. To this end, reference is made to the following drawing which illustrates the embodiment of my invention.

Figure l is a perspective view of the megaphone showing the preferred arrangement of my invention. Figure 2 is a fragmentary section of the megaphone showing aside view of the receiving end. Figure 3, a top view ofthe receiving end. Figure 4.is a modification of the megaphone. I j a The body A of the megaphoneis hollow, preferably conical in shape and=constructed of thin papier-mach', metal or other suitable material, with both ends open, the larger end B forprojecting the amplified sound and the smaller end 5 C for receiving the sound from the voice; At-

tached to the receiving and C is a mouth piece D which is composed of two elements E-and F. It is preferred that the mouth pieceD be construct-v ed of metaland have a beaded edge to protect the user from injury when the megaphone is brought into normal position against the face. Element E of the, mouth piece D should be cirvention has for its purpose the carrying into .cular and shaped so as to contour of the mouth and the element F should be a forwardly closed hollow transverse projection and slightly V- shaped to inclose the lower portion of the nose. I also prefer that the forward wall of element F be rearwardly inclined so that it will not interpose any obstruction to the forward movement of the sound waves coming from the It will thus be seen that the mouth piece D 65' covers completely the openings of both the mouth and nose and that any sound emitted therefrom is carried simultaneously into the receiving end of the megaphone.

It is obvious that elements E and F of the 7 mouthpiece D can be made in one piece of suitable material and attached to the body A by any practical means or, if made of papier-mach, they can be moulded integrally with the body A itself.

Instead of having element F project above the body A as in Figurel, the mouth piece D can bemade large enough to cover both the nose and mouth, and be provided with anotch G forwardly formed in the mouth piece D to permit the lower portion of the nose to be inclosed in the receive This modification is clearly shown in Figured. Details of this nature are immaterial.

My inpractice of my discovery that to produce a megaphone that will amplify the voice with great volume and clarity withoutundue strain on the i vocal'cords, means must be provided in the re-f v ceiving end of the megaphone for introducing all 9 the sounds emitted from both the'mouth and nose into the amplifying chamber of the megaphone.

I am fully aware that, if the receiving endC 1 of the megaphone is made large enough, as in the held slightly forward of the mouth, the sounds coming from the nose will in part enter the mouth piece, but the mere fact that it is held forwardly of the mouth permits the escape and lessens the force of the sound waves to the extent 100 that a very poor amplification of the voice occurs. Having fully described my invention, 1 claim as new; i J g 1. A megaphone comprising aconical tubular body having a smaller end so sized and shaped as 5".

to be contactable with the face of the user around and to closely encompass both the mouth and nasal passageawith the nasal outlets within the outwardly flaring interior of the main body."

2. A' megaphone comprising a conical tubular 11933 body having at one side of its smaller end a transverse nose-receiving notch permitting the entry of the nose of the user into the outwardly flaring interior of the tubular body.

3. A megaphone comprising a conical tubular body having its smaller end sized to closely encompass the mouth, a transverse notch located at one side of the smaller end of said body, and an enclosure for the nose projecting over said transverse notch, with the outlet thereof located within the outwardly flaring interior of the tubular body.

4. A megaphone comprising a conical tubular body having its smaller end sized to closely encompass the mouth, a transverse notch located at one side of the smaller end of said body, an open end V shaped enclosurefor the nose projecting over said transverse notch, with the outlet thereof located within the outwardly flaring interior of the tubular body.

5. A megaphone comprising a conical tubular body having its smaller end sized to closely encompass the mouth, a transverse notch located at one side of the smaller end of said body, and an open end V shaped projection whose forward 'wall is rearwardly inclined secured over said and means to connect the opening in the wall of saidbody with the outlets of the nasal cavities of the user, substantially as described.

HARRISON L. STALEY.

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