US865937A - Telephone-receiver. - Google Patents

Description

No 865,937. PATENTED SEPT. 10, 19071 E. J QUINBY.

TELEPHONE RECEIVER.

APPLIGATION FILED NOV.22,1905.

Specificatio To all whom it may concer o.- r Belmown that I, EDWI'N J QUINBY, a citizen of th v United States of America, 'and a resident of Portland,

Qumberland'county, State of Maine, haveiiuvented certain new and usefulilmproveinents in Telephone- Receivers, of which the'fpllowing-is a specification.

well known:

I and a cap d at the hook class which are com nonly used and My invention relates to a telephone receiver of that hichhang on at bifurcated hook.- posed of hollow elongated casings oflhard rubber generally cylindrical in form One end is enlarged to engage the hook of the telephone and the other end is alsoeiilarged to receive the ear piece which, generally} screwed to it. t i I -11 The diaphragm and the magnet are secured to 'the body of the casing inside. These receivers are frequentlydropped while being used and when they strikeageinst the wall or other qnently broken and it is to remedy this frequent breakage and to provide a receiver which is sufiiciently tough I to stand hard knocks that'is theobject of my invention. The invention consists essentially of'forming the caspreferably of sheet brass or steel, fitting inside of the casing at the flaring end-and secured thereto a bushing composed of insulating ma-Q terial into which the magnetfits and bywhich it is held out'of contact with the casing. ,i

I illustrate my invention by means of the accornpanyi'ng drawing in whiclic- 5 Figure .1 is'a part longitudinal section and part side elevation of a receiver constructed according to my'invention and Fig 2 is an end eleylttio'n with portions cut away. V -l In the diawing A. represents the magnet provided with an upper :rTead A, B the diaphragm and C the ear piece of the receiver these parts (being common' and The casingD has the common shape be-- ing generally cylindrical and largerateach end t han in the middle, one end being slig'htly cnlargedto engage the hook and the other end flaring to the size pfthe ear piece. I I r The casing is made of hollow metai preferably of spun brass and it consists as here shown, of the casing proper and fitting into the end of the casing and which. is preierablysecured' to the-casing proper by brazing or soldering. The cap d has a cenis of Letters Patent. Application filed November 2 2, 1965 Serial i ingfis so forrned that the g the rhagnet head, "which ard object they are free according to the form of the side fittingth casing and beingrforrned to rabbet in its "outer PAfifENT oEFIoEQ TELEPHONER GE VER.

Patented Sept. l0, 1967. No.-2ss,61e.

tral opening into which is screwed the insulating bush ing e through which passes the cord not here showi; 'lhe ear piece O fits inthe enlarged end of the casing and is preferably composed of insulating Inaterial. It is secured to the casing'as screws a passing through right angle openings c in the edgeotthe casing and entering the edge ofrthe earpiece. The magnet is held in the metalrcasing and out of lcon- These telephone receivers are com-t I v by means of abushing l? of insulating material and formed to fit the flaring-portion of the casingf- It is secured in -place by rneans and a rim f is formed on it to insulatethe edge oftlie magnet fro nthe metal of the casing. The bushmagnet A will fit into it and fits withih the riinffl is shown as being fastened to the upperedge of the bushingby here shown by one or more screwsfor other suitable screws a. A tight fit of ,thev head within the rabbet forlned at the outer end'of the bushing F is insured by fiaring thesinneizsurface of the rim f to correspond 'with the external flare of vthe periphery screws a thus serve to 'iorce the head ",we'dging action. jThe bushing thus completeiy insulates the magnet iro'rn contact withanytiiietal and it is as efifectivge as if the entire receiver was constructed of insulated material.- I j The receiver thus described will stand a good deal (if cheaplytmade than the ordinary kind. Z

It will be understedd that the bushing ,F is formed magnet to be used, the outthe opening and upper end fit closely toi-the magnet.

o. I c'la1m:' Y I A telephone receiver consisting of a hollow metal casing fiai'ed at its V with an internal end, the rimof said internally, the magnet, 21

for forcing said head into seated position. I

rabb'et being flared magnet head supporting the some" of the head. The into its seat witha 'hard usage without breaking and itcan be rhuch more Signed at Portland, Maine this -'9th day of November ll 905. v I

S. W. Bnrus. MARY A. DoNsnnsoN. I. 1

V A Y n I I"? I I r r l

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