US1275124A - Sanitary mouthpiece-cover for telephone-transmitters. - Google Patents

Description

' G. W. BULLEY.

SANITARY MOUTHPIECE COVER FOR TELEPHONE TRANSMITTERS. APPLICATION FILED sums, i915.

1 ,27 5, 1 24. Patented Aug. 6, 1918.

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UNITED STATES PA ENT oluucn. I i clones wmutnnr, or 03194110, rumors.

seminar noUrnrmcn-covna son TELEPHONE- Tm! To allwk'om it may concern: I

Be it known that I, GEORGE 'W. BUILEY, a citizen of the United States of America, and resident of Chicago, Cook county, Illinois,'have invented a certain new and useful Improvement in Sanitary Mouth iece-C'ov-i ers for Telephone-Transmitters, 0 which the following is a, specification.

My invention relates to improvements in sanitary mouthpiece covers for telephone transmitters, and the object of my invention is to provide a device-of this character which Will be simple, durable and reliable in construction and effective and efiicient in operation, and cheap-to manufacture.

Other objects of my invention will appear" hereinafter.

Referring to the accompanying drawings: Figure 1 is a section through a transmitter mouthpiece and a sanitary cover embodying my invention. i Fig. 2 is an enlarged detail section showing the clip and spacer construction.

Fig. 3 is a plan viewof the cover disk.- Fig. 4 is a rear face view of a slightly modified m'outhpiececover device, and f' Fig, v5 is an enlarged detail section on line 55 of Fig. 4. K

The devlce which I have shownin the tecting the transmitter mouthpiece from the entrance of dust and germs and at the same time not interfere in any sense with theyoperation of the transmitter.

Telephone transmitter .mouthpieces are usually ofa flared or illustrated at A in the drawing. Their forward end is open and thereby they are subjected' to germs from the person speaking into them, and to dust and dirt because they are exposed. My improved device is intended to fit-over the end of this mouthpiece and thereby effectually close the end against dust and germs. Tl'llS device consists .of a substantially flat erably circular in in diameter than mitter mouthpiece. make it of such diameter that its edge is substantially flush with or slightly beyond the outer rim or edge of the mouthpiece whereshape and slightly larger the openingv in the trans- Specification of Iietters Iatent. Application filed September a, 1910. Serial in. 119,219.

\ disk, as shown in Flgs. 1 and 2, or they a be small. tongues,

are preferably located beneath drawings-is designed for the purpose of proin the usual manner.

bell-shape, such as,

" plate and the face thereof disk B of thin metal pref- In fact 1 preferably -Patented Aug;

by it substantially covers the area. I also provide several small cligs or holding 'finistributed around bent or formed to of the transmitter gers 0, preferably three, the edge of the disk and engage the outer surface mouthpiece.

These clips are spring over the rim the disk isremoved or replaced, and to thus yieldingly grip the mouthpiece and hold the device firmly in place. I space the disk slightly from the transmitter mouthpiece so as not to; interfere with the voice currents, and in' the present construction I provide small spacers D which are preferably formed integrall with the disk. These spacers maybe ormed inxany suitable instance, they may be in the .form of beads or upsets struck up from the body of the may Figs. 4 and disk. They or close to the holding clips. They bear against the rim of the mouthpiece. The disk is made sheet metal thin act as a diaphragm when spoken against, thus setting up vibrations of the air within the mouthpiece which effect the transmitter The spacing of the disk from the mouthpiece provides an opening which equalizes the air pressure within as shown in 5, bent back uponthe face of the the mouthpiece and prevents diflerential pressure on opposite sides of the disk.

One advantage of my improved device is that it can be made entirely in one piece by punching or blanking it from sheet metal and forming it in one operation. The device can be given a neat appearing and sanitary finish such as white enamel or nickel can be provided with' a suitable advertisement.

The combination of a telephone transmitter mouthpiece open at its end and having an annular r m,;a flat thin metallic diaphragm disk of substantially the diameter of the opening positioned. in front thereof and parallel with the plane of the mouthpiece opening, integralspring cl1ps formed at the manner, for

preferably integral with the disk, and formed or bent to snap a of the mouthpiece when" enough 'so that it will Y Y edge of the'disk engagin the mouthpiece Signed R) Y me at Chicago, Illinois, this for holdin the disk in p ace, and integral 23rd day 0 August, 3 .916;

spacers ho ding the disk slightly separate -GEORGE W. BULLEY. from the mouthpiece to leave a thin annular Witnesses: i3 0 ening between the mouthplece run and AM! Jun,

t e diaphragm disk. E. H. Cum.

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