US1362008A - Telephone-receiver - Google Patents

Description

J. C. KANE.

TELEPHONE RECEIVER.

APPLICATION FILED OCT. 21, I919.

Patented Dec. 14, 1920.

Ila I0 WITNESSES lNVE/VTUI? JdH/v- C. KANE,

A TTORNEYS PATENT OFFICE.

O N c. KANE, or DETROIT, MICHIGAN.

TELEPHONE-RECEIVER.

Specification of Letters Patent.

Patented Dec. 14., 1920.

Application filed October 21, 1919. Serial No. 332,151.

1 all whom it may concern Be it known that 1, JOHN C. KANE, a citizen of the United States, and a resident of Detroit, in the county otWayne and State oi Michigan, have made certain new use- .t'ul Improvements in Telephone-Receiters, of which the following is a specification.

My invention is an improvementin telehone receivers of tnecharacter specially tapted for radio work, wherein a iragm is provided balanced inthe ic field between the pole pieces, t 1' ice the s ress per 06 of a 1 steel diaphra d every pow ietio further object is "to provide a race wherein the vibratiorirc thzi. s as well as those produce; i of the molecules in the pole .izeol. 17.1 the drawings Figure 1 is a per oectiveview O1 proved receiver i 2 is a diagi the cir uit coin 3 1s a longitu receiver;

Fig. l is a section on the line 3. In the present embodiments-t the inven- 1s hnal section tion, two coils 1 and2 are provided, mounted upon sott'iron pole pieces 3 and 4:, the said .pole pieces being arranged in axial alinement, as shown, with their adjacent ends spaced apart far enough to receive the diaphragm. 5 between them. I

The diaphragm is held between the sections Grand 7 of an inclosing shell, the said sections being cup-shaped; and being con-- nected at their adjacent ends by a ring 18 which is threaded on to the sections. Eac section 6 and 7 has an internally threade opening 9 at its outer end for engaging the adjacent pole piece each polepiece having a threaded portion, beyond the coil for engaging the internally threaded opening.

The. binding posts 10 and '11, which are connected with the terminals of vthe respec tive coils, extendthrough openings in the ends of'the'sections 6 and 7 and are insulated therefrom by tubes 12 and washers 13 of suitable insulating material. As shown in Fig. 3,.the bores of the'pole pieces 3 and 4 flare at theirinner ends toward the diaphragm and the diaphragm is firmly held between thesections 6 and 7 of the shell, which incloses the coils.

h uts 1% are threaded on to the pole pieces outside of the shell sections, and by means of these nuts the pole pieces and the coils may be adjusted toward and from the diaphragm to perfectly balance the same.

The inclosing shell 6'? is of hard steel e and negative poles in the interior dc of the pole pieces and tnese poles will "eir unlike ends adjacent. 'That is we pole pieces will be similarly ar- The coils are wound to a very high resistance, and they so arranged when a current passes through them they each other tha is the like ends will Now the'diaphragm is balwhen a cur ent passes through s, the balance 0" she iield is shiftech 1 the di- -phragm swept with it.- An inof the field strength will intensify of the diaphragm up to saturar pale pieces. The pole pieces are 'tarev nt as much aspossible eddy currents by means of the nuts at the outer end they may be adqusted to get the diaphragm at the critical balance. This diaphragm may be of steel. and of .015 inch.

Flexible tubes 15 extend from the ends of the pole pieces, the said tubes being arranged upon reduced portions 16, at the outer ends of the pole pieces, and each tube 15 has an ear piece 17 at the end remote from the receiver for engagingwithin the ears of the user. The receiver is supported from the neck by means (gt a tape or strap 18, whose ends are connected with the shell on either side of the ring 8. n Thus the receiver is supported on the chest, and the tubes 15 are of ,sufiicient lengthto engage the ears without strain. 1

In use, the receiver is arranged in the line 18 connecting the aerial 19 with the ground in the manner shown in Fig. 2. Lead wires 20 connect with the binding post 10 at the ends of the receiver, and a lead wire 21 connects the binding post 1 2.

The inclosing shell is permanently mag netizedso as to induce positive and negative oles in the interior ends of the pole pieces. his magnet'entirely inclosihg the coil, as it does, performs thevery important funcpe nently magnetized so as to induce -'closing, the coils and having openings 4 ends of the pole pieces, and

tion of confining the magnetic field of the coil within the. instrument, making for strongersignals. r k

I claim 3 1. A receiver of the character specified, comprising a pair of alined pole pieces, a coil on each pole piece, a sectional shell inclosing the coils and having openings through which the pole pieces are threaded, 4 a ring connecting the adjacent end of the shell-sections and having threaded. engagement therewith, a diaphragm held between the shell sections and between the adjacent ends of the pole pieces, and means for adjusting the coils and pole pieces toward'andfrom the diaphragm, said means comprising lock nuts threaded onto the pole pieces outside of the shell sections.

2. A receiver Ofs the character specified,

comprising a pair of ali ned pole pieces, a

coil on'each pole piece, a sectional shell inthrough which the pole pieces are threaded, a ring connecting the adjacent end'of the shell sections-and having-threaded engagement therewith, a-diaphragm held between the shell sections and between the adjacent eans for ad-' justing the coils and pole pieces toward and from the diaphragm. I 3. A receiver ofthe character specified, comprising a pair of alined pole'pieces, a

I w coil on each pole piece, a sectional shell incoi closing the coils and having openings through which the pole pieces are threaded,

a ring connecting the adjacent ends of the shell sections, a diaphragm held between the shell sections and between the adjacent ends of the pole pieces, and m'eans for adjusting the coils and pole pieces toward and from the diaphragm. v

4. A. IBCBIVGI" of the character specified, comprising a shell supporting a diaphragmtraiisversely thereof, pole pieces carrying s adjustably connected with the endwf. the shell .for movement toward and from the diaphragm, said pole pieces having flexible tubes connected with their outer ends and carrying 'ear pieces. E

5. A receiver ofithe character specified,

prising alined tubular pole pieces, each pole piece carrying a coil, said'coils when electrified havin 'their like ends adjacent, a diaphragm held between adjacent ends of the,

c pole pieces, means for adjusting the pole pieces towardand from the diaphra and receiving tubes connected with t e 'pole pieces.

6. A receiver of the character specified comprising a shell supporting a diaphragm transversely thereof, pole pieces ad ustably connected with the ends of the shell for movement toward aid from the diaphragm, said" shell and the pole pieces being permanently magnetized, and the pole pieces having their unlike poles adjacent, coils carried by the ,pole pieces and adapted to be inter-v posed in electrical circuit in series in such mannerthat when energized their like poles will be adjacent. l

7. A receiver of the character specified comprising a shell supporting a diaphragm transversely thereof, ,pole pieces connected with the ends of the shell for movement .toward and from the diaphragm, said shell and the pole pieces being permanently magnetized, and the pole ,pieces having their imlike poles adjacent, coils carried by the pole pieces and adapted to be interposed in electrical circuit in "series in such manner that when energized their like poles will beadjacent. w

8. A receiver of the character specified comprising a shell-having a diaphragm supported transversely thereof and-having pole pieces at its ends for movement toward and i from the shelha coil ongeach pole piece, said shell and pole piece being permanently mag-- netized so that the unlike poles of the pole pieces are adjacent and the coils being arranged so that when energized theirlike poles will be adjacent.' ":9. A receiver of the character specified comprising a diaphragm, a pole piece at each face of the diaphragm, a coil carried by each -p0le piece, said pole pieces being permanentlymagnetized and having their unlike ends adjacent and t e coils being arranged so that when magnetized their like ends adjacent;

JOHN C. Kass;

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