US819531A - Mouthpiece for telephones. - Google Patents

Description

No 819,531. PATENTED MAY 1, 1906.

1". 0. FISHER & W. 0. CULIN.

MOUTHPIEGE FOR TELEPHONES.

APPLICATION FILED 001'. 30, 1905.

witneooea 1 figrzzf UNITED STATES PATENT OFFICE.

FRANK C. FISHER, .OF CHELTENHAM, PENNSYLVANIA, AND WALTER C.

' OULIN, OFCAMDEN,NEW JERSEY;

Specification of Letters Patent.

Patent ed. may}, 19'06.

' Application filed October 30, 1905.: Serial No. 285,050.

To all whomit may-concerm Be it known that we, FRANK 0., FISHER-{1'6- siding'at Cheltenham, in the county of.Mont-. gomery and State-of Penns lvania', and WAL- TER C; OULIN, residin' at amdenj'c'ounty of Camden, State of cw Jersey, citizens of v the United States, have invented new and without liability of being useful Improvements in Mouthpieces for Telephones, of which the following is a speci-v ficatlon.

- Our invention ertains. to mouth ieces for telephones; and .1t contemplates 't e provision of a-mouth iece constructed with a view of-being-strong y connected to its 'su ort and of -withstan'ding rou h usage, and blows irokenofi" hipped,

peciiliar' to or oth'erwise deteriorated, Other-advanta eous: features our invention wil be fully understood-fromthe following description whenfthe' same is considered In connection with the'accompanying drawings, forming part of this specification, in wh1ch Figure- 1 is a View illustrating the mouthpiece constituting the present and preferred embodiment of our invention in diametrical section and'as properly connected to a conventional su port. Fig; 2 is 'a side elevation of the mout piece'rernoved, and Fig. 3 is a transverse section taken in the lane indicated by-the line 3 3 of Fig. 1 loo 'ng in the direction of the arrow.

Similar letters designate corresponding erring to which A is a support, which may be of the conventional t e at present in use, as illustrated, or of iiny other construction compatible with the purposes of our invention, and B is our novel mouthpiece, which is preferably, though not necessarily, connected to the support A by bein screwed into a threaded aperture a in the ace or front late thereof.

As best shown in Fig. 1, t e mouthpiece B comprises a body port1on b, of aluminium or other suitable metal, an exterior section 0, of hard rubber or analogous material, and an parts in all of the views of the drawmgs, re-

.interior section (2, Ofithesame material as the section 0, providedat its inner end with the portion 11 is provided at. its inner en'dlwit an exteriorlyithreaded and co mparatively thick annular portion f, de s1 gned to -be arranged in the aperture a, of the support'A, and it is also provided with a circumferential portion a comparatively thin portion h, preferably shaped as'shown and extending orwardly from the flange g, and an enlargement i, disposed at the outer edge of the thin portion h and having inner and outer shoulders' at its rear side, as will be seen by reference to 1;. The bod ortion or body I) =is preferably cast, thpug 1t may be formed inone. piece in any otherlapproved manner without" involving a departure from the scope of our invention. The exterior section 0, ofhard' rubber or analogous material, surrounds the thin portion h of body I) and is ing and the outer shoulder of, the enlargement within and'close against the said thin portiorg "h of the body and is interposed between th forward sideof the flange g and the innfgf shoulder of the enlargement 4,. By virtueiof this relative arrangement of the body 1), exterior section c, and interior section at it' will be apparent that thesections c and (1 do not contact with the support A, and hence are not liable to be'fractured when the mouthpiece is subjected to-lateral strainor pressure; also,

between the forded by the enlargement i precludes casual movement of the said sections with respect to the body and, greatly lessens the liabilit of the sections bem chipped, cracked, or 0t erwise impaired, W 'Ie the enlargement '11 of the body serves to receive any blows that may be imposed on'the forward end of the mouthpiece and effectually prevents the same from injuring the sections 0 and d.

From the foregoing it will be apparent that a mouthpiece constructed in accordance with our inventon is strongly connected to the support A in such manner that the connec -tion is not liable to be broken or otherwise afiected by weight, strain, or blows-imposed on the mouthpiece, and it will also be apparent th t the mouthpiece per se is not lia e to be bro en chipped or otherwise impaired by casual blows on the same; This will be appreciated as'an important advantage when it is remembered that-the'necessitylo replac ling fragile mouthpieces atfrequeiit intervals terposed between the outer side of the flange flange g, disposed infront of the threaded '11,: while the interior section d is arranged that the inter osition of the sections 0 and d ange g and the shoulders afis a considerable item in the operation of telephone systems.

Notwithstanding the strong and durable qualities of ournovel mouthpiece, as set forth in the fore oing, the said mouthpiece is possessed of al of the acoustic advantages generally ascribed to the rubber mouthpieces at present in eneral use.

o pre er in the manufacture .of our mouthpiece to mold the sections 0 and d at the outer and inner sides of the body I). lVhen the mouthpiece is thus manufactured, it may obviously be produced easily and cheaply, and it will .be appreciated that, in cooling, the sections 0 and d, of hard rubber, gutta-percha, or analogous material will shrink and tightly fit the metallic body.

Having described our invention, what we claim, and desire to secure by Letters Patent, 1s

1. A mouthpiece comprising a section of hard rubber or analogous material, and a metallic body carrying the said section and having one of its ends extended beyond the section and provided with means for effecting connection between the mouthpiece and a support and also having its opposite end extended beyond the section to protect the same against blows.

2. A mouthpiece comprising a body of metal, and sections of other material arranged at opposite sides of the body and interposed between enlargements on the body.

3. A mouthpiece comprising a body of metal having inner and outer enlargements, and a section of other material carried by the body and interposed between the enlargements thereof.

4.. A mouthpiece comprising a body of metal having inner and outer enlargements, and a section of hard rubber, gutta-percha or analogous material, carried by the body and interposed between the enlargements thereof.

5. A mouthpiece comprising a body of metal having means at its inner end whereby it may be connected to a support, and also having inner and outer enlargements, and a section of other material carried by the body and interposed between the enlargements thereof.

6. A mouthpiece comprisinga body of metal having means at its inner end whereby it may be connected to a support and also having inner and outer enlargements at its inner and outer sides, an inner section of other material arranged between the enlargements at the inner side of the body, and a section of said material arranged between the enlargements at the outer sideof the body.

7. A mouthpiece comprising a body, of metal, having a comparatively thick portion at its inner end provided with exterior threads and a circumferential flange, and also having a comparatively thin portion, and an enlargement at the outer end of said thin portion adording shoulders at opposite sides thereof, an outer section of hard rubber, gutta-percha or the like arranged at the outer side of the thin portion of the body and between shoulders thereof, and an inner section of hard rubber, gutta-percha ortthe like arranged at the inner side of the thin portion of the body and between shoulders thereof.

In testimony whereof we have hereunto set our hands inpresence of two subscribing witnesses.

FRANK c. FISHER. WALTER o. CULIN.

Witnesses:

DAVID C. FoLwELL, AL. P. BURCHELL.

Images