US877317A - Auriphone. - Google Patents

Description

PATENTED 11111.21, 1908.

D. O. FOSGATE.

AURIPHONE.

APPLICATION FILED APR. 1a, 1907.

A T'TOR/VEI/S DANIEL O.l FOSGATE, OF CHICAGO, ILLINOIS.

AURIPHON'E.

Speccation of Letters Patent.

Patented Jan. 21, 1908.

Application iiled April 18. 1907; `Serial No. 369.033.

To all whom it may concern:

Be it known that I, DANIEL O. FoseATE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and usehil Auriphone, of which the following-is a speciication.

yThis invention relates to an auriphone, or ear trumpet, of that type in which a diaphragm is employed in the mouthpiece to augment the wave sounds produced by a person speaking into the same, and it relates more particularly to the construction of the mouthpiece.

The invention has for one of its objects to improve and simplify the construction and operation ol' devices of this character vso as to be comparatively inexpensive and easy to manufacture and thoroughly reliable and eiiicient in use.

A further object ofthe invention is to prof' vide a mouthpiece which possesses superior intensifying qualities so that the vslightest sounds become audible, this being due to the.

particular form of chamberbehind the diaphragm whereby. the wave sounds are so aected that they are greatly intensified on their way through the speaking tube.

Another object of the invention is the provision of a simple form of connection be-` tween the flexible sound conducting tube and the mouthpiece, whereby the parts are readily and irmly united.

vVYith these objects in view, land others, as will appear as the nature of the invention is better understood, the invention comprises the various novel features of construction and arrangement of parts, which will be more fully described hereinafter and setforth with particularity in the claims appended hereto.

In the accompanying drawing, which illus` trates one of the embodiments of the invention, Figure 1 is a perspective view of the speaking tube showing the parts of the mouthpiece detached and arranged in their relative positions. Fig. 2 is an enlarged central vertical section of the mouthpiece' with parts of the sound conducting tube in elevation.

Corresponding parts in the several figures are indicated throughout by similar characters of reference.

vReferring to the drawing, A designatesthe mouthpiece, .B the tubular ear piece, and C The open end 6 of the trumpet, which is pre sented to the mouth of the speaker, is

- formed with a rounded rim 7 ,and from the opening 6 the trumpet expands inwardly toward the ilanged end 5. The diaphra rn 2, which may be made from sheet hard ru ber,

steel or mica, but preferably the latter, as it i transmits a more distinct andvclearer sound, is of such a size that its periphery is ilush with the ilan'ge 5 of the shield or trumpet l. The disk 3 is of about thelsarneI diameter as the diaphragm and is provided withan externalthread 8 on its periphery for receiving the ring 4. The ring 4 is formed at its top with an inwardly extending annular flange 9 .that engages over the flange 5 ofthe trumpet 1, so that the diaphragm 2 is firmly clamped between the disk or back 3 and the' trumpet.

The inner surface of the disk or back 3 is annularly concaved so as to form an annu# lar basin-like'ohamber having a centralcone 10- the apex of which'lis located about one sixteenth of an inch from the diaphragm vin .trumpets adapted for' ordinary use. By ,means of this cone,` the. sound waves roduced bx the diaphragm are divided an intensifie as they are conveyed to the tube C.

In connection with this form of sound transmitting chamber, a plurality of avenues for the sound waves .-to pass through are provided, which avenues unite at a suitable point with the'4 -receiving end' of thesound .conducting tube C. For this purpose, the fdisk 3 is formed With a number of nipples 11 to which are attached the branches 1-2 of the tube C.` To increase the iiexibility of the devviceat the mouthpiece, the branches 12 are preferably shprt pieces of rubber tubing which are connected with the main tube C by a Y-couplin 13 which is of hard rubber. T'o securely ho d the branches 12 on the nipples 11, the latter are formed with beads 14 and the branches 1 2 are fitted over the nip les. Around the nipples, and ends of the ru ber tube 13 on the nipples, are the sleeves '15,

. the invention apert'ains.

preferably of hard rubber or metal. vThese sleeves are oi such-a diameter that the pieces oftubing 12 are compressed'at the ,beads 14, as shown in Fig. 2, s that the sleeves and beads serve as vclamping means for securely holding the parts together, and the rigid sleeves serve to prevent bending and breakof the tubes adjacent to the nipples.

a e `'.lrtlrie branches 412 canbe readily detached from the mouthpiece by working the sleeve 15 downwardly on the said branches, until they clear the beads 14, whereupon the banches can be readily pulled oii the nip- From the foregoingv description, taken in connection with the accompanying drawing, the advantages of the construction and of the method of operation will be readily understood by those skilled in the art towhich In operation, the sound waves pro uced by the speaker's voice cause the diaphragmin the mouth iece to vibrate so that the air on the back side ofthe diaphragm is also set into vibration. These wave sounds are divided by the cone 10 and intensified thereby and by the particular shape of the chamber formed betweenthe diaphragm and disk 3. `These intensified sound waves are then directed through the branches of the sound conducting tube and then come together in the latter, whereupon they are transmitted to the ear of the hearer.

The` sensitiveness of the instrument is such that it can beused successfully as a. stethoscope for testing the action" of the heart. When used in this manner, the mouthpiece 1l is placed against the body of the person being' examined, while the ear piece B is, of course, held to the ears of .the physician. It has been found in practice lthat the instrument is'so sensitivethat the hearts action can be heard distinctly through heavy clothing and even while a person is wearing a heavy winter overcoat.

I have described the principle ofv opera-H tion of the invention, together with the apparatus which I now consider to be .the best embodiment thereof, but I desire to have .it understood that the a lparatus shown isv merely illustrative, andt at various changes may be made, as are within the scope of the What is claimed isrj 1. In an instrument ofthe class described, the combination of'a mouthpiece, a single soundconducting tube, and a multiple connection between the mouthpiece and tube.

i 2. In an instrument of the class described,

the combination of a mouthpiece, a single sound conducting tube, and a Iplurality of branches connecting the mout piece with vthe tube.

3. In an instrument ofthe class. described, the combination of amouthpiecehaving a .back of t e diaphragm flexible tubes and sound conducting tube.

6. In an instrument of the class described,

. the combinationwith a disk having an annular eoncavity in one face thereof to form a projecting r1m and provided with a substantially conical raised portion projecting from the center of the eoncavity, of a domeshaped shield. secured to the disk havin a eoncavity facing that of the latter, an a dia hra m interposed between the shield an dis and separating the concavities thereof.

7. In a mouthpiece comprisin a shield, a

diaphragm extending across t e same, a member at the back of the diaphragm, and a means connected with the member and deta'chably4 engaging the shield for clamping he diaphragm between the latter and mem- 8. A mouthpiece comprising a shield having a peripheral iiange at one end, a diaphragm extending across the said end and earing a ainst the flan e, a member at the avin a peripheral aging t e t read and ange detachably enthread, and a ring e having. an internal gaging the flange of the shield to hold the parts in place.

' 9. In an instrument of the class described, .the combination of a shield, a diaphragm, a'member on oneside ofthe diaphragm having an annular hollow and a central vconical portion, means for clamping the member and shield together with the diaphragm between them',nipples on thev member communicating with the hollow thereof, a pair of branches .connected with ,the nipples and a single f t e sound conductor connected to both said branches.

10. In an instrument of the class described,

the combination with a disk having an anvnular eoncavity in one face thereof to form a projecting rim and provided with a substantially conical raised portion projecting from they center of the eoncavity, of a domeshaped shield secured to the disk having a eoncavity facing that of the latter, a dia,-

fphragm interposed between the shield and disk and separating vthe concavities thereof,

a pair of nipples on the disk communicating with the annular eoncavity thereof, a

lbranched pipe having its branches connected to the respective nipples, and la single sound conducting tube connected to receive the sound from both branches of thebranoh pipe.

11. In a device of the character described, the combination ,with a disk having an annular concavity therein and provided With a conical portion raised above the center of the concavity, Vand a diaphragm mounted in coperative relation With the disk and adapted to vibrate in proximity to the conical portion thereof7 of a dome-shaped shield ari ranged in cooperative relation With the diaphragm and opposite to the concavity of the disk, the latter and the shield forming sub- In testimony that I claim the foregoing as posite sides my` own, I have hereto affixed my signature '20 v in the presence of tWo Witnesses.;

DANIEL O. FOSGATE.

Witnesses:

CHAs. R. JonNsoN, F. J. SWAUsH.

aving a re- 15

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