US1331669A - Telephone-mouthpiece - Google Patents

Description

' w. M. PARKER.

. IELEPHONE MOUT'HPIECE.

APPLICATION EYILED DEC. 6, I917.

Patented Feb. 24, 1920.

avwwto'a ih'llz'amflParker attoznu:

WILLIAMM. PARKER, OF PARKERSBURG, WEST VIRGINIA.

TELEPHONE-MOUTHPIECE.

Specification of Letters Patent.

Patented Feb. 24, 1920.

Application filed December 6, 1917. Serial No. 205,768.

To all whomit mayconcern:

Be it known that 1, WILLIAM M. PARKER, a citizen of the United States, residing at Parkersburg, in the county of Wood and State of West Virginia, have invented certain new and useful Improvements in Telephone-Mouthpieces, of which-the following is a specification.

This invention relates to mouth-pieces for telephones, and is directed particularly to an improved type of mouth-piece which may be of material known to beextremely sanie tary.

At present, it issomewhat common practice to make these mouthpieces of dark colored composition wherein the attaching threads and bell portion are integrally formed, but itis also well known that this material is porous to some considerable ex tent and also possesses more or less adhesive property, which makes the device itself somewhat unsanitary especially when used in public places. I therefore aim to make the bell portion of my mouth-piece structure of a material which is itself non-porous, such as highly glazed porcelain and which bell portion carries at its rear, a separate means whereby the mouthpiece as a whole is attached to the telephone proper. It is impractical to make the attaching threads at the rear of the bell portion of porcelain or similar material, since this material is usually very brittle and causes'the threads to break and sliver, which probably would result in the injury of the instrument as a whole. For this reason, I preferably make the mouth-piece of a glazed porcelain bell portion and a metallic rear end secured thereto, whereby the mouth-piece as a whole may be attached to the telephone instrument without injury to the same.

It is also my object to so arrange the structure that the bell portion is not detachable from the threaded attaching portion. It is well known that the transmitter portion of a telephone instrument is adjustably mounted slightly about a lionzontal pivot at its rear, this adjustment being usually made by the speaker by grasping the bell portion. It is at tlmes such as this that the bell portion should be in permanent holding relation with the transmitter to prevent its accidental detachment from the same. It will be readily apparent that continual detaching and attaching of the mouth-piece must in time work injury to the instrument;

Further objects of my invention will appear from the following detailed description of the accompanying sheet of. drawing? in which similar characters of reference desig nate corresponding parts, and. in which:

Figure 1 shows the upper portion of a telephone with my improved type of mouthpiece applied.

Fig. 2 is a central vertical section of my 'mproved type of mouth-piece, showing the parts in assembled relation.

Fig. 3 is a central vertical section through the bell portion only.

Fig. a is a fragmentary central vertical section showing the manner in which the attaching member is permanently secured to the bell portion.

Fig. 5 is a grouped view showing the attaching member in perspective as it appears after it is permanently in the bell portion and also before its application thereto; and,

Fig. -6 is a vertical section through the rear socketed end of the bell member.

In Fig. l, the telephonestand is designated by the reference numeral 1 and is shown as being provided with the transmitter structure 2, preferably mounted thereon by means of the horizontal adjusting screw 3. To this transmitter structure there is secured the mouth-piece which, in the present instance, comprises a bell portion a, and an attaching member 5. Preferably the bell portion is made of highly glazed porcelain while the attaching member is preferably made of metal. This bell portion is of the same general shape as that now in use, being provided with an interior transverse wall 6 having a series of apertures 7 against which the voice is cast when talking. The rear end of this bell member is also socketed as shown at 8, and is further provided with a series of under-cut notched portions 9, which under-cut portions are designed to cooperate with the attaching member 5 in permanently holding the parts in assembled relation both as re ards a se aratin movement and as notched portions 9. It will be understood that the metal from which the prongs are struck is substantially unyielding to hold the prongs in place but is suiiiciently pliable to permit them to assume their operating position. This is accomplished preferably by expanding at least a portion of the neck portion, for instance by means of the tool shown at 12 in Fig. whereby the tongues 11 are caused to seat themselves in the notched portions 9. It will be understood that this neck portion is mounted in this manner within the socketed end of the bell member in such manner as to be permanently attached thereto when once applied, so that the bell member may not be accidentally or even intentionally removed, such as might occur during the adjustment oi the transmitter structure 2 about its, pivot bolt It will, therefore, appear that the lateral projections formed upon the neck portion of the attaching member, as well as the attaching member itself are unyielding, and that when once the parts are in assembled relation they will permanently so remain. The rear end of this attaching member is also provided witha series of threads 13, for use in attachment to the transmitter structure. The parts are so arranged also, that a shoulder portion 1 is presented between the neck portion 10 and the threaded end 13 for abutment against the rear end 15 of the bell member.

From the foregoing description taken in connection with the accompanying sheet of drawings, it will be apparent that I have provided a type of mouth-piece possessing movement. In this manner it is extremelyunlikely that the telephone instrument itself may be injured because of its mouth-piece attachment.

What I claim is:

A telephone mouth-piece comprising a bell member formed with a transverse wall intermediate its ends and formed to present a socketed rear end, said socketed end having a plurality of notches formed therein, a cylindrical attaching member formed with the shoulder against which the rear end of said bell member abuts, tongues struck from the forward end of said attaching member and bent to it said notches to secure said two members together and also to prevent a relative rotation between them, and threads H. B. GROVE, R. E. SAMUELS.

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