US633146A - Combined generator and ringer for telephones. - Google Patents

Description

No. 633,l46. Patented Sept. I9, I899.

J. a, NOLEN. COMBINED GENERATOR AND RINGER FOR TELEPHONES.

(Application filed June 30. 1898.)

(No Model.)

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UNITED STATES PATENT OFFICE.

JAMES G. NOLEN, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-IIALF TO CHARLES E. ARTHUR, OF SAME PLACE.

COMBINED GENERATOR AND RINGER FOR TELEPHONES.

SPECIFICATION forming part of Letters IPatent No. 633,146, dated September 19, 1899.

Application filed June 30,1898. Serial No. 684,796. (No model.)

T at whom it may concern;

Be it known that I, J AMES G. NoLEN, acitizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in a Combined Generator and Ringer for Telephones, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention has reference to new and useful improvements in telephones, and relates particularly to a novel combination of some of the telephone parts, whereby certain beneficial results hereinafter set forth are obtained.

One of the essential objects of my invention is to so arrange and combine the generator and ringermechanisms in an instrument of the type referred to that the usual polarizing-magnet employed for the fields of the ringer mechanism will be entirely dispensed with, together with numerous contacts and connections that heretofore necessarily have been employed.

A further object of the invention is to provide means whereby the strength of the polarizing-n1agnet may be increased or diminished, as occasion may require.

\Vith these objects in view my invention consists, broadly, in so combining the generator and ringer mechanisms as to permit of the utilization of the field magnet or magnets of the generator as the polarizing-magnet for the fields of the ringer, whereby a device is obtained the use of which dispenses with the necessity of the usual ringer-magnet and of numerous contacts and connections that have been a necessity in telephone construction.

The invention further consists in means for varying the location of the ringer mechanism with respect to the field-magnets of the generator, whereby the strength of the polariz ing-magnet may be varied as desired.

The invention still further consists in various details of construction, as will be more fully hereinafter set forth and shown in the drawings, in which Figure l is a section through a telephonegenerator, taken on line 00 00, Fig. 2, illustrating the ringer-coils as located between the parallel members or legs of one of the generator-magnets, which is the preferable arrangement. Fig. 2 is an end elevation of my combined generator and ringer. Fig. 3 is a plan view of the ringer mechanism with the top of the generator-magnet removed to more fully illustrate the method of arrangement of the coils. Fig. a is a modification of the parts shown in Fig. 8, illustrating the preferable method of securing the coils to the generatormagnet; and Fig. 5 is an end elevation of the mechanism shown in Fig. at.

In Fig. 1, A and 13 represent the permanent field-magnets of the generator, the magnets being doubled and of the usual horseshoe type. They are clamped together by means of U shaped plates C C upon either side of the magnets and carry the usual pole-blocks D D.

E is an armature of ordinary formation, the shaft of which has suit-able bearings in the end plates F and G. At one end the armature-shaft carries the gear-wheel II and at the other end the contact-piece I, which is shown to abut against the usual spring J, attached toa portion of the telephone-casing K.

In my improved mechanism the shaft L, carrying the usual gear M, which meshes with the pinion ll, extends but half-way through the generator, so as to permit of the location of the field-coils, hereinafter referred to, within one of the generator-magnets. An up right support N, secured to the blocks D 1), supports the shaft L at one end, and a similar bracket 0, formed, preferably, integral with the end plate F, forms a bearing for the shaft at the other end.

Within the field-magnet B of the generator and between the parallel members or legs thereof I preferably arrange the usual fieldcoils I of the ringer mechanism in such manner that the cores of the coils will be magnetized by the permanent magnet of the generator acting as a polarizing-magnet. The

usual magnet of the type last referred to is thus entirely dispensed with.

Means are also provided whereby the ringer-magnets may be moved to or from the poles of the generatormagnet. The mechanism preferably employed comprises a supporting-bracket, in which the coils are adapted to be carried, so constructed and arranged as to be capable of a vertical adjustment between the legs of one of the generator-magnets. By moving the ringer-magnets in proximity to the magnetpoles of the generator the magnetization of the cores of the ringer-magnets is increased. This resul t is frequently desired,as perm auent magnets in the course of time lose to some extent their magnetic strength.

In one style of construction the supportingbracket just referred to is in the form of an inverted U, comprising rear transverse portions c a, which are connected by a brass yoke 7), side pieces 0 c, which are adapted to bear against the inner faces of the generatormagnet, front portions (1 d, in which are arranged binding-posts e c, and rearwardly-extendingarms ff, which abutagainst the outer faces of the parallel members of the generator and are adapted to be clamped to the legs of the field-magnet by means of the screws g g. The side pieces 0 c carry at their forward ends hubs it h, which are bored, as shown by the dotted lines in Fig. 3, to receive the cores 2' i. The cores just referred to extend through the hubs and through apertures formed for the same in the side plates 0 c, as shown by the dotted lines, so as to form a contact with the inner portions of the generator-magnet. The cores are held in proper position by means of set-screwsjj in the hubs. Upon the cores are arranged the field-coils P of the ringer mechanism, the coils being wound in the usual manner and the ends of said coils being secured to the binding-posts c e.

The letter Q designates the usual armature, pivotally supported in the yoke b, which extends between the coils and carries the striker R.

In Figs. 4: and 5 a modified type of securing mechanism for the field-coils of the ringer mechanism is shown, which type is on account of its simplicity preferable in use, as it can be readily attached to the field-magnet of the generator. In the modification the ringer-coils are arranged within the field-magnet of the generator in such manner that the cores of the coils are parallel with the legs of the magnet instead of being at right angles thereto, as in Fig. 3. By this arrangement longer coils may be employed and superior results obtained. The letters A B designate the modified form of ringer-coils arranged between the legs of the magnet B, the cores a and b of which are arranged parallel to the parallel members of said magnet. The front ends of the cores referred to are provided with transverse portions 0 and d, which are preferably integral with the cores and adapted to be in contact with and to be clamped tightly against the legs of the generator-magnet. A brass cross-piece c connects the transverse members. The rear portions of the coils referred to are supported by means of a transverse rod or strap f, said strap being apertured at g g to permit the rear portions of the cores a and b to extend therethrough. The strap is further provided with forwardlyextending arms 7t h, which project beyond the legs of the magnet and extend through apertures formed for the same in the transverse portions 0 d of the cores. The arms just described are threaded attheir free ends to receive clamping-nuts "/I t", by means of which the coils are tightly clamped in their proper position between the legs of the field magnet of the generator. D represents a t-ransversely-arranged armature which is pivotally supported upon a lugj upon the strap f. Slots are formed in the strap referred to and in the brass connecting-bar a, through which extends the clapper or striker E, which in turn is secured to the armature.

It is to be observed that while I have shown and described two methods of combining the generator and ringer mechanisms I do not desire to be limited to the exact construction shown, as other methods may be adopted without departing from the spirit of my invention, which consists in so combining the ringer mechanism of a telephone with the usual telephone-generator that the field-magnets of the latter will be utilized as the polarizing-magnet for the former, whereby, as before set forth, numerous parts which have heretofore been found necessary in the construction of telephones are entirely dispensed with and superior results are obtained. It will likewise be observed that by housing the ringer mechanism within the generator field-magnets an increase in the magnetic inertia or retardation of the ringer-coils will be obtained through the presence of the large quantity of iron and steel in the generator. This result is very desirable in high-wound and bridge work, as in working telephones in multiple or bridge it is important that besides a high resistance a high coefficient of self-induction should also be obtained in the coils to prevent the voice-currents from leaking through on the bridge-circuits.

Having thus described my invention, what I claim, and desire to secure by Letters Patcut, is

1. A combined generator and ringer for telephones, comprising a signal-current generator provided with one or more field-magnets, a supporting-frame adj ustably secured to one of said magnets, a ringer mechanism, the fieldmagnets of which are arranged within the supporting-bracket, and connections between the ringer-magnets and the legs of one of the generator-magnets, substantially as described.

2. Aconnbined generatorandringerfortelei one of the generator-magnets, substantially [0 phones, comprising a signal-current generaas described. tor, provided with one or more field-magnets, In testimony whereof I affix my signature asnpporting-frame arranged between thelegs in presence of two Witnesses. of one of said magnets and adjustably secured thereto, a ringer mechanism, the field-mag- JAMES NOLEN' nets of Which are arranged between the sup- Witnesses:

porting-bracket, and connections between the l JHARLES L. STOCKER,

l L. J. \Vrrrr'rmronn.

cores of the ringer-magnets and the legs of

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