US998161A - Magnetic telephone. - Google Patents

Description

w. w. DEAN. MAGNETIC TELEPHONE, APPLICATION FILED MAR. 29, 1909.

Patented July 18,1911.

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.. unrrnn $TAC PAEENT OFFICE 'w. pm, or ELYRIA, onto, Assionon To run DEAN ELEc'rnIccomrm,

ELYRIA, OHIO, A CORPORATION OF OHIO.

. MAGNETIt TELEPHONE.

To all whom it mag concern: Be it. known that l, \Vnruu \V. l)E.\N, n

:eitizen' of the United States, residing at Elyriu, in the county of Lorain and State of )hio, have invented a new and-useful [in-- prorementin Magnetic Telephones, of. which the following is a s )ecific'atio'n.

This-invention re ates to improvements in telephone receivers,'nnd has for its objectan uhproved and simplified receiver which combines the advantages of chenpness n construction and greater etliciency, being more particularly intend-ed "*Oi'flll'hlil} n magnetic circuit .\vith a-=lo\v rebut-a1 ee by which a greater intlueme'is'exwted on the diaphragm. By this means the some infliccnce may be exerted on the 'tliup'hragiu as is exerted in the older forms, with a smaller v receiver coil, thus placing a smaller-resist once in the hue circuit and ofi'er n 'less'imwpedance to the voice currents, wine 1 greatlty increases the clearness of speech and the e ficiency of'the instrument- Another object of my invention'is to so construct the core of the electromagnet and the other flux conductors that the'y may be easily and cheaply manufactured, preferthe diaphra The am litude of the dia phragms vi rations is t en a function of .the total radius, or the distance from the it center to the edge of the diaphragm.

By making the core and tie return condoctors integral, I am enabled to 30in the laminations with few connectors,thus avoidin the use of nonconductors of flux and the reduction of the area available for that purpose. The laminations are detachably clamped together and ri 'dly mounted to a base .in the receiver shel Thus the cores ma be removed and defective coils taken ofi' wit out; dist-urbiu the other parts These parts are not easil disarranged by rou h usage, being firm y secured together. y

Specification of Letters Patent. o os d filed Jamil-2s, 1503. Serial No. 486,405.

Patented July '18, 1911.

tough connecting means. Obviously I may make the laminul'ions of other shapes and designs. within the scope of the claims.

Although l-niey provide more return cir cuits'fo'r the nnignet-ic llltX, thus distributing the flux over a. larger area, preferably but two are used. I ma also place the conductor currying thc e ectric current on any one or more of the limbs, as-I see expedient, but I prefer the form illustrated in the drawing.

tioii of the receiver taken through and partl lel to the E-shaped member. Fig. 2 1s a cross Section of the receiver cup taken along the lines, H of Fig. 1.. Fig. 3 is an end elelvzition of the cup and contents with the diaphragm and retaining ring removed. Fig. t-is, {in elevation of one of the E-shaped punchings,

Referring to the" drawings and to the embodiment of my invention there shown, I have used the seine reference letters on the various parts in the several figures.

1 is the main pint of the receiver shell on which isscrcwed the ear piece 2, The cup 4 having a base 15 upon which is screwed a retaining ring 3, is placed within the shell. The diaphragm is clamped between the cup and the ring as shown. The member 5 which is preferably built, up of -E-shupcd members punched out of suitable metal and lllllsllttltt her 5 and three perpendicular limbs 5, 5", and 5", one designed to form a part of the In thed-rnwings:Figure 1 is across secin Fig. 4, consists of a base ine1ncoreand the other two, the return circuit. These punclnngs are. covered with shellac,-

or otherwise insulated, and a number clumped together between non-magnetic brackets 7, better shown in F g. 2. Insulated or non-mugnetic bolts 6 or other fasteners,

are then passed through the holes 14 in the laminations and correspoudin holes in the brackets, clamping them togetfie and to the brackets. The brackets are fastenedto the base 15 ofthe cup and the coil of the electronuignet. 13 placed on the central limb.

cued by long transmission or the curve thereof hasalreai-ly been distorted.

\Vhile I have shown this particular form of mounting itnvill be understood that I may employ other arrangements without departirzg from-the invention as defined by the, claims. It will also be obvious to those skilled in the art, thatnumerous and extensired partures from. the form and details Of'llldllPPtll'illllS here shown, may be made Without departing trom the spirit of this invention, thesamc being therein shown solely for the purpose of clearly illustrating one specific embodiment thereof.

Having thus illustrated and described my invention, I claim:

1. In a telephone receiver, the ce:iibina-' tion of a base, a plurality of E shaped laminations, capable of conducting magnetic fillX mounted on said base, and rigid fastening means for clamping said laminations together and attaching them to the base, said clamping means dotachably connecting said laminations to said base.

2. In a telcpho'ne receiver, a shell, an ear piece upon said shell, :1 cup within said shell, an insulation member attached to the bottom of said cup, line conductors terminating upon said insulation member, angular brackets upon the base of said cup, an E-shaped flux conducting member clamped between said brackets, a coil connected to said line terminals and wound upon a limb of said E-shaped member, and a diaphragm coni-' pleting a magnetic circuit.

3. In a telephone receiver, the combination of a base. a plurality pt E shaped flux conductors mounted on said base, supporting means rigidly clamping said flux conductors to said base, said supporting means inechan cally coupled to said base andnncuns for detachablv connecting said conductors to cup held in place by said cap and shell, an E-shaped flux conductor mounted in said cup, a coil iii-said cup, lgid supporting means for said flux conductor attached to said cup, and connectors detaehably conmeeting said flux conductor to said means.

5. In a magnetic telephone, the combine-- tion of a receiver shell andcap, a receiver cup held in place by said cap and shell, a plurality of flux conductible laminatioiis, rigid fastening means clamping said laminations' together and attaching them to said cup. and connectors detachably ccinnccting said laminatiuns to said fastening meaiis.

6. In a magnetic telephone, the combination of a base, a plurality of flux conductible laminations consisting of punchings having a body member and three limbs of substantialiy uniform cross section throughout their length, rigid' supporting means therefor tightly clamping said laminations together and detachably connecting them to the base.

7. In a magnetic telephone, the combination of a base, a plurality of E-shaped flux conductors detachably connected together and rigidly mounted to said base, a receiver coil mounted thereon and a vibratile diaphragm controlled thereby.

8. In a telephone receiver, a receiver shell,

an ear piece adapted to be mounted onsaid shell, :1 receiver cup clamped in position in sa id shell by the receiver cap, angular bracle cts mounted within said cup, a plurality of E shaped laminations clamped in position in said cup by said brackets and forming a core and return tlu'x conductors for the receiver magnet, a coil mounted on said laminations and a vibratile diaphragm controlled by said coil.

3. In a telephone-receiver, a receiver shell, an ear piece adapted to be mounted on said shell. :1 receiver cup, having a portion folded over and adapted to be clamped between the shell and ear iiece to position the cup in the receiver shel angular brackets mounted in said cup, a plurality of E shaped lgmiinations clamped between said brackets and forming portions of a magnetic circuit, a.

circuit, of said coil.

7 In testimony whereof I affix my signature in presence of two witnesses. v

a )ViLLiAM'w. DEAN. V t'nessesr Q1 H. L. HARRIS,

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