US1040775A - Megaphone. - Google Patents

Description

C. SGHANANDOAH.

MEGAPHONE.

PPLIOAToN FILED DEG. 19, 1911.

UNITED sTArnsrnn'r canton CHAPMAN SCHANANDOAH, OF NORFOLK,- VIRGINIA.

' nneunonn.

Specification of Letters Ilatent.V

Application led December 19; 1911; Serial No, 666,739.

Patented cees, 1912.

To all whom't't-.my concern; i v

Be it' known that I, CHAPMAN'SoHANAN- DoAH, a citizen of the United States, residing at Norfolk, in the county of Norfolk and State of Virginia, have invented .certam new and useful Improvements in'- Mega;

phones, of which the followingis a specifi? Qation, reference being had therein tothe accompanying drawing. l

This invention relatesto megaphones and has special reference to a megaphone having an attachment whereby sound. waves may be caught so that the device can be used as an audiphone. y

The principal` object of theginvention' is to improve the general constructionof devices of this character.

A second object of the invention is to lacters of reference in icate like parts in theseveral views, and Figure 1 is a perspective view of a device. constructed in accordance with this invention. Fig. 2 isa longitudinal median section therethrough.' IFig. 3 is l The megaphone consists of a frusto-coni.

a transverse section of one of the ear pieces employed in connection herewith. .Figz 4 is a face view of said ear piece.' Fig. 5 is a view of a certain valveused herein, the valve being shown in position. --Fig. vis .aview of the valve removed from its casing. ,""Fig. 7 is a view of certain wiretightening means employed in connection herewith.

cal horn 10 having a ysmaller substantially 'frusto-conical mouth piece 11 attached at its: smaller end. Within the frusto conical.

f .horn 10 there is provided stops 12against whi labuts a ring 13 carrying a series of pegs 14 provided'with square ends and between which are strung w1res'15. The bottom ofthe body 10-is provided* with "an opening 16 from whicltleadsa tube 17 havf -ing communication with atransversetube' 18 which is provided at its upper end'vwith' certain ear pieces, each of which consists of` a body 19, ywitlz'niwhich is fitted a. ring 20y provided Withsquare fend pegs 2l` between whichare strung wires 22. The edge of the ear pleces are provided withl acushion 23 of soft, rubber so 'that 1t rests easilyagain'st .the ears vof the user, the tube 18 passing around beneath! the users chin. v

QAdiacent the opening 16 the tube 17 is .provided withl a valve consisting of a casing `L4l whereinmoves a plunger 25 having an opening 26 therethrough and from this opening extends a slot 27. Attached to this valve is a stem 28 'provided on its end with a push button 29 and" this stem projects through the casing as .clearly shown in vF ig. 5. Between the other end of the valve and the bottom of the casing 24 there isv provided a spring 30 which normally holds the vvalve in the position shown in Fig. 5.

Connectin the ear pieces 19 is a wire 31,

the ends o which are'secured to the respective central wires ,22 of said ear pieces and from this wire 31 extends a wire 32 which passes through a tube 17 and is attached to the central one of the wires 15. g t For the purpose of tightening the wires and adjusting them in unison there is pro-- vided a key 33 of the ordinary clockltype, it being understood that the pegs" 14 and 21 are revoluble' in their respective rings after the manner ofthe pegs of a violin orother musical instrument. y, p A s v `In using the device the ear. pieces `are placed upon thejears 'withthe tube 18 extending around beneath the chin and this `will bring the mouth oppositegthe mouth piece 11. The operator may face in--the direction of the person with whomv he wishes to communicate-and by'speakinglinto the mouth piece sound will be conveyed to-him 1in the ordinary' manner. HWhen usingl the 'device to speak into it is preferred to shut oi-thesound wavesqby closing the valve so that the ,only opening that remains is the small'opening 27 whichv is `provided for the reception of aw'irev 32 whensaid valve is. fclosed. When the other person desires t0 speak the valve is opened and. sound waves enter the megaphone and strike the wires I15 also passing down through 'the tube 17.

,Now asthe wires 15 and'21arein unison the metallic :connectionf made by' thewires 31' andl 32 between these wires will cause the same. to vibrate and strengthen the sound wave at the ear piece.

There has thus been provided a simple and efficient device of the kind described and for the purpose specified.

It is obvious that many minor changes may be made in the form and construction thereof Wit-hout departing from the material principles thereof and it is therefore not wished to confine the invention to the exact form herein shown and described, but it is wished to include all such as properly come Within the scope of the appended claims.

What is claimed is Y 1. The combination With an ear piece for megaphone horns oli' a ring carried in said ear piece, pegs carried by said ring and Leeds/75 revoluble therein, and Wires connecting said pegs and stretching across said ring.

2. The combination With an ear piece for megaphone horns of a ring carried in said ear piece, pegs carried by said ring and 20 CHAPMAN SCHANANDOAH.

Witnesses L. N. GiLLIs, M. M. MAHONEY.

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