US252132A - Joseph olmsted - Google Patents

Description

(NoModeL) OLMSTED,

TELEPHONE TRANSMITTER.

No. 252,132. Patented Jan. 10,1882.

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JOSEPH oLMsTan, on NEW YORK, N.Y.

TELEPHONE-TRANSMITTER.'

par1: of Letters SPECIFICATION forming ljatent Nb. 252,132, dated January 10, 1882.

Application filed Octoher 14, 1881. (No model.)

Toall whom it may concern: j l

Be it [known that I, JOSEPH OLMSTED, a' citizen of the United States, residing in'New 3 York, county of New York, and State of New York, have invented a new and useful Telephone-Transmitter, of which the following is a specification, j l

Myinventiou consists in a no el construo-l ,tion of the electrodesor cirouit-controllingjpors t construction of the contacts or eleotrodes f I emp l oyed for. making contact with the elem j nected with the diaphragm so asto be put in 1 ing M trodes.

tion of the instrun1ent,wh ereby the operation I ,ofthe instrumentin transmittingsounds is greatly improyed and theconstancy ofthe adj justment increased, and whereby, also, the oc' currence of the hissing, sputtering, and other foreign sounds in the receiver, caused by abnormal'action of the transmitter, are largelyi ded 1, a: 5. [1.

Myinvention alsoconsists inothernovel feau s ef n tiuet' n, lat ieim re par icul r t et ji tine il r ee's and. the ean m-i p 'y' d fqrh din t e el c r e n po n, the nature offwhich will appearfrom thefollowq ing description; and the accompanying drawi l W Q j a l Figure l is a 'top or plan View of the instru-! ment, showing the front of the transmitter-cas'f ingythe diaphragm, and the mouth-piece inf horizontal section. Fig. 2 is a side View, show ing the supporting-rodfor the pivoted electrodes in section. Fig. 3 vshows'a modified 5 In telephone trausmitters as heretofore usu-g ally constructed but one electrode has beeni trodeor contact which is attached to or con-t motion thereby, and: in 1 those instanceswhere i wockflmdes h be n u d re ing sp fth'e }i e h 'ein; i r nes a e e emp yed? for compelling contact, and indcpendentadj ust- 4 3 1 6 1 1W? be n u d fe zth t e t i mnrot k'fi ansi ier di e f o z pr o instrumentspfdtsclass in that-a multiplicity it Own ight shea hs d nh me ecirod while, fur

'i p r a eile e bsie m l ye res n aea nstth electrode connected with the diaphragm, @fichj electrode 'beingfreely pivoted so;as toresjt by ther, s

lect e harm qm m0 u, t

s ita le t cesrsath e t er- T e electr de th r are a] being symmetrically arranged, and each resting by its own weight upon the common electrodecarried by the diaphragm, the natural andlnormal contact is the same for all, whereas intheicase of spring-supportedelectrodes there arie no-mejans of determining'the force which tendsto hold the electrodes in contact with the diaphragm,and it is hence impossible to have the same initial or normal contact for all. Moreover, as there is a multiplicity of" feet the operation of theginstrument, and as electrodes adefect in one will notseriously afthe'ele'ctrodes are hung upon a common adjustable support theinitial force tending to h'OIdLthe n in contactcan be readily adjusted for allby one and the same adjustment. The form of the, pivoted or swinging electrodeemployedjis also peculiar, andis such thattan adjustment toincrease the initial tbrcetehding to hold it in contact, with thediaphragm-electrodewill also vary the angle of impingement ofjthe electrodecarried by the diaph ragm with the pivoted electrodes anddecrease the tendency of the latter to yield or move under'the .action ofthe diaphragm-electrode.

. -Intheaccompanyingdrawings,Arepresents the frontof the transmitter-casing, and B the mouth-piece.

DaiPIGSGI] ts the diaphragm clam ped against ,a'plate, G, of insulating material, by a screw or bolt-or other'suitable means.

1E isatmetal ringor washer bearingagainst the diaphragm. Theplate, diaphr;agm, and. washer are clamped against the inside face of the front plate:

g representsja metalrod'projecting at angles from thejdiaphragm, and carrying at its enda cross-arm, G, of any suitable material, which constitutes theelect-rode,oric ontact ati as to be putiu motion thereby.

tachedto orconnectedwith the diaphragm so 1 ,'At H is represented agseries pivoted plates, preferably of carbonized paper'or card- ;board, and strunginpo'n ametal rod, I, which is fixed in knobs K, of hard rubber or other insulating material, screwed uponthe ends of ;bolts ;L.j The latterpass through the diaphragm and the front of the casing,asshown, andare iprovidedwithgnuts M, whereby they may .be adjusted longitudinally backward and forward, carryin g withthemth'e freely-pi voted electrodes H. The under edge of the electrodes H, or the portion resting upon the rod G, is inclined, as shown, so that the latterimpinges against the edges of electrodes H at an angle. As will be seen, any movement of the rod G forward will tend to raise the ends of the plates or electrode H. As shown in the This adjustment is accomplished by means of the rods L and'bolts M. The same adjustment serves also to vary the initial or normal force tending to bring the electrodes H into contact with the rod G, since the 'nearer the support-s G and I are brought together the greater will i be the portion of the weight of the plates H resting upon therod G. It is obvious thatthe latter adjustment for degree of force with which contact is made maybe still accomplished, al-

though the rods G and I are not in the same horizontal plane, and that the adjustment for angle of incidence or directness of contact, and

readiness with which the plates will yield to movementof G, may also be made under such conditions. i

The plates H, as I have before remarked, are preferably of carbon formed by carbonizing card-board or other analogous material, after the manner employed in making carbon strips from paper or card-board for the incandescent portion of electric lamps. They may, however, be formed in other ways; but I prefer to make them in the manner specified, since it is simple, and the plates, beinglight, give a delicate and sensitive contact. I I do not, however, limit myself to carbon as the material for the plates, since they may, if desired, be made of thin plates of any desired metal-'-as for instance, platinum the electrode G being in this case preferably formed with its contact-surface of carbon, although I do not limit myself in the latter particular, nor do I desire to limit myself, so far as the multiple-pivoted electrodes are concerned, to the part-icular'form shown, it being feasible to use other constructions, since this portion of my invention consists in freely pivoting or supporting a number of independ- I cut electrodes so that they will rest by gravity a gainstaco'mmon electrode carried by the diaphragm, and also in pivoting or supporting a number of electrodes upon the same adjust "able piece."

The form of the electrode G, and the manner of attaching the same to the diaphragm, or supporting it so that it may be put in motion by the latter, may also be varied in many ways.

I also wish it to be understood that the-devices for adjusting the part upon which the multiple electrodes are supported may be varied without departing from the'spirit of the invention.

The electrical connections for the instrument are made at the points I? and N, the latter being a binding-post upon the end of the metal rod I. The circuit is from N through I, electrodes H, electrode G, diaphragm D, and out at I.

In Fig. 3 is shown a modified construction of the electrodes. In this case the electrode S, attached to the diaphragm, has an inclined face, the pivoted gravity-electrode R resting upon the same at one corner. In this case the necessary adjustment would be made by mov ing the support for R in a verticalplane, although other methods of adjustment may be employed.

What I claim as my invention is- 1. The combination, in a tele ih'one transmitter, of a contact electrode carried by the diaphra gm, and a series of independentlypivoted simple electrodes resting independently and by their own weight against the electrode can ried by the diaphragm.

2. A compound electrode for a telephonetransmitter, consisting of a series of independently-yielding variable contact-electrodes, in

combination'with a common adjustable sup port for said electrodes.

3. A compound electrode for a telephonetransmitter, consisting of anumber of simple freely-pivoted electrodes resting by the action of gravity upon the opposite electrode, in combination with a common adjustablesupport upon whichsaid electrodes are pivoted.

4. A compound electrode for a telephonetransmitter,'consistin g of a series of. parallel independently-pivoted carbon plates fixedupo a common support. a a

5. The combination of a series of parallel independently-pivoted carbon plates and an adjustable common support upon which said plates are pivoted.

6. Acompound electrode for telephones, consisting of a number of parallel plates independently pivoted and resting with their edges upon the opposite electrode. V

7. A compound electrode for a telephonetransmitter, consisting of a number of parallel pivoted plates formed of carbonized card-board, paper, or equivalent material. I

- 8. An electrode for a telephone-transmitter, consist-ingof parallel plates struu g upon a conductingmod.

9. The combination, with an electrode connected with the diaphragm of a transmitter, and having a curved coutact-surface,of an electrode consisting of a thin sheet of conducting material'resting with its edge against the'diaph'ragm electrode.

. 10. A contact-electrode for 'atelephone-transmitter, consisting of a thin sheet of carbonized paperor thin'card-board,said electrode being mounted so as torest with. its edge against the electrode with which it makes contact.

IlO

11. Acontact-el-ectrode foratelephone-transtrode, and an adjustable support for the first electrode, all combined as described, so that by adjusting the support of the pivoted electrode the angle of impingement ot' the second electrode may be varied.

13. The combination of a com pound electrode consisting ofa seriesof pivoted parallel plates,

an electrode connected to a diaphragm, against which electrode the parallel plates bear with inclined edges, and an adjustable support for said pivotedelectrodes, adjustable to and from I the electrode connected with the diaphragm.

14. The combination of a series of parallel pivoted plates, a cross-bar connected to a diaphragm, against which bar the edges of the pivoted plates rest, a conducting-bar upon which the pivoted plates are strung, and supportingrods for said conducting-bar, connected at right angles thereto, and adjustable longitudinally.

15. The combination of rod E, attached to the diaphragm cross-bar G, pivoted plates H, resting upon thebar, with their lower edge inclined thereto, rod I, and adj ustablc rods L, substantially as described.

16. The combination of a pivoted electrode, and an adjustable support for the same, adapted to be moved to and from the electrode against which said pivoted electrode bears, so as to vary the initial pressure in the manner described by shifting the point upon the pivoted electrode at which it makes contact and is par tially supported.

JOSEPH OLMSTED.

Witnesses:

H. G. TOWNSEND, THOMAS TOOMEY.

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