US429129A - Noel b - Google Patents

Description

(No Model.)

N. B. GINOGHIO. MAGNETO TELEPHONE.

No. 429,129. Patented June 3, 1890.

ja/mento@ UNITED STATES PATENT OFFICE.

NOEL B. GINOOHIO, OF NEV YORK, N. Y., ASSIGNOR OF ONE-HALF TO ELIAS M. GREENE, OF SAME PLACE.

MAGNETO-TELEPHONE.

SPECIFICATION forming part of Letters Patent No. 429,129, dated J une 3, 1890.

Application filed August 6, 1889. Serial No. 319,932. -(No model.)

have invented certain new and useful Im? provements in Magneto-Telephones, of which the following is a specification.

My invention relates to magneto-telephones; and it has for its object to improve the construction of such instruments,so that they will be more effective in operation either in receiving or transmitting messages; and my invention consists in a telephone constructed and arranged substantially as hereinafter pointed out.

In the accompanying drawings, Figure 1 is a sectional view of a telephone embodying myinvention. Fig. 2 is a similar View showing the use of a compound core or coil. Fig. 3 is a plan view of a portion of Fig. 2, showing the arrangement of the coils; and Fig. e

y is a sectional view of a modification.

One of the most important features of a magneto-telephone is to produce such an instrument that will be capable of operating either to send or receive messages and to produce the best results in the way of loud and far speaking telephones. Many efforts have heretofore been made to produce a telephone having these qualities in a large degree, and many arrangements of parts have been suggested. One of the general features of such an instrument consists in producing a strong 'm agnetic field between the diaphragm and the core of the electro-magnet by which it is operated or upon which it operates; and the leading feature of my present invention consists in an arrangement and construction of parts whereby this is attained to a high degrec.

In the accompanying drawings, A represents a number of permanent magnets, preferably bent into U shape, and having one of the poles of each magnet and that of the same name connected toa common plate, as H. In the figure Ihave shown an instrument having four such magnets arranged at right angles to each other and secured to this common plate. Upon this plate is formed an annular flange I, into which is fitted the core G of the electro magnet of the instrument.

This core is made up of iine wires, preferably of soft iron,forming a very intense magnetic pole or extension pole-piece to the permanent magnets A. This is arranged so that its upper end is directly opposite the center of the diaphragm B, of magnetic material, and is surrounded by one or more coils connected in the main-line circuit, as hereinafter specified. The other ends or poles of the permanent magnets are connected to an iron ring O, upon which the diaphragm B rests, being clamped thereto by a cap-piece D, of any material, which is made in the form of a tru mpet-mouth, having the. large end clamped on the diaphragm, and on the small end is mounted the usual mouth-piece E.

In order to make the core as powerful as possible, I preferably mount upon the central core G Y-shaped pieces K, the extremities of which support the cores G' G2 G3 of the coils F F2 F3, which coils are preferably connected in series in the line. These Y-shaped pieces, being in intimate contact with the main core G, concentrate the magnetism in the cores G G2 G3 in the extremity of the main core G,

so that the pole P is in a highly-magnetic condition. The diaphragm B is also connected to the opposite poles of all the permanent magnets, so that the magnetic power of all of them is concentrated in the diaphragm at a point opposite the main core. In this way I am able to produce a very strong magnetic field between the center of the diaphragm and the main core, and it is evident that any vibration or movement of the diaphragm in this field will produce greatly-increased magnetic changes in the core, and hence in the coils surrounding the core connected in the line. On the contrary, varying currents fiowing through the coils will change the magnetic condition of the core, and these in turn will operate upon the diaphragm in the strong magnetic field and produce intensified effects.

In Fig. 4 the construction varies in det-ail in the plate H, which is connected to the common poles of the magnets, supports a soft-i ron polepiece R, and the core G, of fine wires, is fitted in the end of the pole-piece R. A box S, of some resonant material, is shown as surrounding the core' and helix, and is held in- IOO place by being screwed into the inner edge of the ring C. XVith this arrangement of parts I have found that I can use a very strong current in the coils, and the intense magnetic iield enables me to produce intensified effects in the variations transmitted to the line, so that the instruments can be used for greater distances and produce louder eiiects than is common. It is evident that these eiieets can be increased or diminished Within certain limits by increasing or diminishing the number and strength of the permanent magnets; and While I have indicated four as being a proper numberI do not confine my invention to this specific construction. The same may be said in regard to the number of coils and cores forming the compound electro-magnet. l have adopted three in the present instance, as they can be compactly arranged in a small instrument, and I find they produce satisfactory results; but more magnets can be arranged and connected together, so as to have a common pole-picee opposite the center ot the diaphragm, substantially as indicated, Without departing from the spirit of my in- Vention.

XVhat I claim is- 1. In a magneto-telephone, the combi nation,

with the permanent magnets, of a plate connecting all the poles of one name, a lia-nge on said plate, a core of fine wires supported in said iiango, a ring of magnetic material connecting the poles of the opposite name, and a diaphragm supported on said ring, substantially as described.

2. In a magneto-telephone, the compound electro-1nagnet consisting of a central core, yoke-pieces connected to said core and4 supporting the independent cores, and helices surrounding said independent cores, the connected poles being all of the same polarity, substantially as described.

3. In a magnetotelephone, the combination of a plurality of permanent magnets, a softiron core common to all the magnets, yokepieces connected to said core and supporting independent cores, and helices connected in series in the line surrounding said independent cores, substantially as described.

In testimony whereofl have si gncd m yname to this speciiication in the presence of two subscribing witnesses.

NOEL ll. GINOCIIIO.

IVitncsscs:

JOHN C. FRANCIS, W. J. IIAWTnoRN.

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