US449254A - Telephone - Google Patents

Description

(No Model.)

3 Sheets-Sheet 1.

W. HUMANS.

TELEPHONE.

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3 Sheets-Sheet 2.

W. HUMANS.

(No Model.)

TELEPHONE.

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W. HUMANS. TELEPHONE.

No. 449,254. Patented Mar. s1, 1891.

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UNITED STATES PATENT OFFICE.

IVILLIAM HUMANS, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO THE AMERICAN MAGNETIC ELECTRIC COMPANY, OF JERSEY CITY, NEIV JERSEY.

TELEPHONE.

SPECIFICATION forming part of Letters Patent No. 449,254, dated March 31, 1891.

Application filed July 23, 1885. Serial No. 172,434. (No model.)

To all whom it may concern:

Be it known that I, WILLIMI HUMANS, a citizen of the Dominion of Canada, residing at Cambridge, in the county of Middlesex and State of Massachusetts, have invented a new and useful Magneto-Telephone, of which the following is a specification, reference being had to the accompanying drawings, making a part hereof, in which- Figure 1 is a section on line o; of Fig. 2, which is a plan with the diaphragm removed of one of my telephones, which can be used either as a transmitter or receiver. Fig. 3 is a detail, partly in section, illustrating the diaphragm and its clamping-bars. Fig. 4 is a sectional det-ail showing the spool and its coil and the projecting pole-piece for receiving the spool and containing the adjustable polepiece. Figs. 5 and 6 are diametrical sections at right angles one to the other of a telephone with a single pole. Fig. 7 is a plan of one pair of magnets, and Fig. 9 a bottom plan of the same. Figs. 8 and 10 are the top and bottom plans of the other pair of magnets. Fig. 11 is an edge view of one of the magnets. Figs. 12 and 13 are edge views of the two magnets, shown in plan, arranged together in Fig. 12 to form a telephonecase with two poles. Fig. 14 is a plan view showing the telephone with four poles. Fig. 15 illustrates details, some of which are also illustrated in Figs. 1.5, 15b, 15C, 16, 17, and 18. Fig. 19 shows the telephone hung on a hook.

Mv invention is a telephone which consists, essentially, of a compound permanent magnet consisting of at least two permanent magnets, each forming a portion of an annular or rectangular case, a diaphragm, and one or more pole-pieces, the free end of each polepiece being within the case and under the diaphragm.

The advantages of my invention are not only cheapness of construction and great durability, but also consist in concentration of the magnetic field, so as to utilize the variationsof that iield to .the fullest extent, not only to produce the movement of the diaa phragm when my telephone is used as a re- In the drawings I have shown two pole-v pieces, each with its coil, and a diaphragm,

which is divided by clamping-bars into twoV semicircular diaphragms, one for each polepiece, and this is the second feature of my invention.

In the drawings, A A A2 A3 are four permanent magnets, each forming half a ring, so that when put together they form a complete ring or case with like pole to like pole.

Fig. 12 shows the magnets A A2 together, and Figs. 11 and 13 show the magnets A A3, which are placed upon the magnets A A2, and the four are held together by the hoop B and cover G, as illustrated in Figs. 5 and 6. I prefer to form lugsa on the individual magnets and to connect them by screws, as shown.

vSome of these screws also serve to hold the pole-pieces a2 a3 in place, as clearly shown in Fig. 4.

A third feature of my construction consists in making the pole-piece tubular and inserting a core in that tube, as shown in Fig. 4. This part of my construction relates to the adjustment of the effective portion ofthe pole-piece, and in practice I make the tubular portion of the pole-piece a3 as Va nut, and the adjustable portion a* as a screw, so that by simply turning the pole-piece a4 in the polepiece c3 the nice adjustment requisite is readily effected. The check-nut 0,5 preserves the adjustment.

The diaphragm D is shown clamped bei tween two brass rings d cl', and the ring cl is secured t0 the magnets A A3, but the diaphragm may be itself clamped to the mag-r nets, although that will slightly reduce the magnetic energy, if the diaphragm be of sheet iron, as it usually is. The rings d d are crossed by bars d2 (Z3, which serve as clamps to hold the diaphragm from moving when so clamped,.thus practically forming two diaphragms, one for each pole-piece. Of course but one of the pole-pieces may be utilized, and in that case the axis of the pole-piece will be in line with the center of the diaphragm and the cross-clamps cl2 d3 dispensed with, and of course also four poles; or any other number, may be formed, and a polepiece be used with all or any number of the poles,- the diaphragm being clamped crosswise, so as to make a suitable portion for each pole-piece used, as in Fig. 1l.

The screwcups shown in Figs. 16 and 17 are held in place by clamping the insulators ff in recesses f2, formed to receive them in the magnets, all as clearly shown in Figs. 11, 12, 13, and 2. The hangers (shown in Figs. 15 and 15) and insulators (shown in Figs. 15J and 15C) are held in place in the same way in recesses f4. The hoop B is provided with holes to correspond with the holes formed by the recesses f2.

The pole-piece a3 carries the coil a, and when two coils are used they are connected, as clearly shown in Fig. 2.

`The bottom g is held in place by screws g', as shown in Figs. 1 and 9, and the nuts g2 are dropped in cavities g3, formed in the poles of the magnets, as clearly shown in Figs. 1, 9, and 12, and the ring d is held on in the same manner, as clearly shown in Figs. 1, 6, and 7.

The cover G is held in place either by its closeness of fit or by small screws.

The holes in the bottom g are for adjustment of the additional pole-piecea".

The cover G is of sheet metal struck up into the proper form for a telephone monthpiece and may be held in place by the screws.

What I claim as my invention is 1. A telephone consisting of a permanent magnet Whose elements are connected pole to pole to form a case, a diaphragm extending across the open end of that magnetic'case, and one or more pole-pieces and coils Within that magnetic case, all substantially as described.

2. In combination, the magnets recessed at f2, the insulator ff', and means for holding the magnets together, whereby they act as clamps for the insulators, all substantially as and for the purpose set forth.

3. In combination, the magnets AA A2 A3, recessed at f2, and the hoop B, with the insulator f or f or its equivalent, and means for holding the magnets together, substantially as shown, whereby the magnets serve as clamps, as a case, and as magnets, all substantially as described.

s. The magnets A A A2 A3, in combination with the clamping-lugs a and pole-pieces a3, whereby the magnets are not'only held together in pairs, but those pairs are `also held.Y

together.

WILLIAM I-IUMANS.

Witnesses: f

J. E. MAYNADIER, JOHN R. SNOW.

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