USRE8558E - Improvement in art of transmitting musical impressions or sounds telegraphically - Google Patents

Description

- 2 Shets-Sheetl. E. GRAY, Assignoi", by mesne Assignments, to THE HARMONIG TELEGRAPH 00.

Art of Transmitting Musical Impressions or Sounds Telegraphioailyi No. 8,558. Reissued Jan. 28,1819.

7 WI '1'.N'ES,S1L',5' INVENTOIE,

' M Win 2 Sheets-Sheet 2.

E. GRAY,

Assignqr, by mesne Assignments, to THE HARMONIC TELEGRAPH 00.

Art of Trans mitting Musical lmpressions pr sounds Telegraphioally. No. 8,558. Reissued Jan. 28,1879.

WITNESSES [.N'VYZJ TOR S fly his .AHnrney-s' 4 I UNITED STATES PATENT OFFICE.

ELISHA GRAY, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE HAItMQNIO TELEGRAPH COMPANY, OF NEW YORK CITY.

IMPROVEMENT IN ART OF TRANSMITTING MUSICAL IMPRESSICNS 0R SOUNDS TELEGRAPHICALLY.

Specification forming part. of Letters Patent No. 166,095, dated July 21, 1875; Reissue No. 8.558, dated January 28, 1879; application filed May 7, 1878.

DmsIoN A'.

'1'0 all whom yl t may concern? an electro-inagnet elon'gates under the action .of'an electric current, and contracts again i when the current ceases; consequently a sue cession of impnlsesor interruptions will cause the. magnet to vibrate, and if these vibrations be of suflicient frequency a musical tone will be produced, the pitch of which will depend upon the rapidity of t-hevibrations.

' My improvements are based upon-the discovery above mentioned.

The subject-matter claimed will hereinafter specificallylbe designated.

In the accompanying drawings, Figure 1 represents an arrangement upon circuit of apparatus which 1 use for carrying out the objects of my invention, the transmitting part of the-apparatus being shown in plan,

and thereceiver in perspective. Fig. 2 represents a view in elevation of the transmit; ting apparatus Fig. 3, an end view thereof and Fig. 4, a detail view of one of the rh'eotomes.-. I

. In the apparatus shown I make use of induced currents from either a primary or sec:

ondary coil for afl'ecting the vibrating bar or core of an clectro-magnet and cause the necessary succession of said currents by interruption in the primary circuit made by an automatic or mechanical circuit-breaker.

.Thc'iiransmit'ting apparatus is mounted upon a suitable frame or base, A. An ordinary in dnction-coil, B, has the usual. primary and secondary circuits'a 1). Automatic vibrating electrowmes G. C, of the usual construction,

. have their vibrating circuit-closing springs '0 so adjustcddhat when. in action they pro ducc musical tones, which, from the diii'crence in adjustment and the length andthiclrness of the springs, are of different pitch. A common. telegraph-key, 1), is, placed in the primary circuit to make or break the battery-connections.

In the drawings I have shown two electrotomes of identical construction, but of different pitch and two keys. Both the keys and elcctroto'mes are in the primary circuit, which .is so divided that part of the circuit passes through each key and its corresponding electrotome. The number of electrotomes may be increased, so that tones extending through two or more octaves may he produced.

At the receiving-station an electro-magnet, I), or a coil of wire surrounding a bar of iron, is placed in circuit. A hollow box', drum. cylinder, or resonator, S, of metal, is placed on the poles of the magnet. This resonator,

it will be observed, is composed of a eircum fereuti-al band having two end walls, disks,

or diaphragms, one of which rests upon the constituting an armature therefor and vibrating in unison therewith, while the magnets,

other is pe'foratcd with S-shaped openings, somewhatlike the sounding-board of a. violin, thus constituting what I call a common reeeiver "---that is, one capable of. responding to or reproducing all kinds of tones.

The operationof the apparatus is as .follows: Under the arrangementv shown in the drawings, when the key is closed the 1) *mary 1 circuit will pass from the battery M Bt ough .the wires a, the key, and its corresponding and will be automatically. in- I cleetrotrome, terrupted inthe usual manner. The spring ofhe electrot'ome will thus be cansedto r brate rapidly and to produce a tone, the pitch of which is determined by the rate of vibra} tlon.

or depressed simultaneously.

The rhytlnniealhnpulses, vlbrations, or 'interruptions of the. current-representing the tones will simultaneously produce iii a sec ondary circuit, 1), of .the iluluction-eoil-aseries of induced currents, impulses, or vibrations,

It is obvious that several keys may be closed tomes hcreinbeforc described.

9 cases corresponding in number with the vibrations of the electrotomes, and as the receiving electric-magnet E is connected with this current, it will be caused to vibrate correspondingly, thus roducing a tone or tones of correspending 'pitch with those received from the trai'ismitting apparatus. These tones are andibl y reproduced and their sound intensified by the use of the hollow'box, cylinder, sound-intensifying chamber. or resonator S, above melt tioned.

The circuit may obviously be extended to any distance desired from the transmittingstation.

When a single electrotnme is thrown into vibration, its corresponding, tone will be reproduced on the sounder or resonator S by the magnet. When elcctrotomes of different pitch are successively operated, theirtoues will be correspondingly reproduced by the receiver or resonator; and when two or more clcotrotomcs are simultaneously sounded, the tone of. each will still be reproducedwithout confusion on the sounder or resonator, by which means I am enabled to reproduce com posite tones,'mclodies, or tunes.

Mechanical circuit-breakers may be'substitutcdlfor the automa'ticully-ribrating elect-re; I have, in fact, used such mechanical circuit-breakers of various construction butI have found the electrotome more satisfactory in practice.

In this instance the receiver is shown and described as operated by the induced current of the secondary coil; but the secondary or extracurrent of the, primary coil may be used instead thereof with good eticct.

The above-described apparatus is especiallyadapted to telegraph on long land and submarine lines. By it letters and signals can be represented by tones dili'cring in pitch; or the ordinary Morse signals can be made by short and long interruptions in the prolonged tone of the same pitch, th us'insurin g great rapidity of transmission.

I do not claim herein the' apparatus itself, as that forms the subiect-matter ot'auother -method,

division of this application filed simultaneously herewith.

Letters Patent of the United Sta-tesNo. 166,096, granted to me July 27, 1875, on an application originally filed April 18, 1874, show an apparatus somewhat similartmthc one herein described for transmitting,musical tones through an electric circuit composed in partbf animal tissue-and a rcsonaut metallic receiver, .but without the intervention of a magnet. I do not, therefore, claim herein anything shown in said patent, I claim herein. the combination, with a mail line, of an intermittent circuit-breaker, ora series thereof, each adapted to throw upon the Neither 0'].

lines. definite number ofelectrical impulses per unit of time, and a key or' keys, one for and controlling each of suchcircuit-breakers, as such combination constitutes the subjectmatter of another application for Letters Pat 'ent of the United States filed by me February" The combination of a telegraphic circuit, an automatic circuit-breaker capable-of pro ducing a musical tone, and an elcctromag uet receiver for "reproducing the tone by be ing thrown into vibrations -by impulses gen= crated by the circuitbr'eaker is not broadly claimed herein, as this combination constitutes a part of the subject1natter of my said application also; but neither of the said applica tions abovo mentioue'd show a disk or diaphragm of metal, or a sound-intensifying cham ber orrcsonator in combination with. a magnet. i

I claim as of my own invention- 1.- The hereinbefore-described novel. a'rt, method, or system of audiblyand simultaneously reproducing upon the metal disk or diaphragm oi. the receiver (through the interyention of the electro-maguet included In-the.

electric circuit) two; or more series of-rhythmical impulses or vibrations representing mu sical impressions, or sounds, or composite tones.

2. The hereinbetore-dscribed novel art,

method, or system of'inteusifying in the re sonator composite tones produced by thecom joint'operationof the electro-magnct, included inthe electric circuit-, a.nd the disk or diaphragm ofmetal vibrating in unison therewith.

3. The hereinbefore-described novel art, method, or system of simultaneously transmitting two or more series of rhythmical i|n.--

pulses or vibrations represcntingcomposite tones through the electric circuit, and reproducing them through the intervention 'oftly;

magnet, and the disk of diaphragm of metal vibrating in unison therewith at the receiving end of the line. I I

4. The hereinbefore-described novel art, or system of simultaneously 'rcpror ducing in the-electric c rcuit two or more so ries of rhythmical impnlses'or vibrations rep resenting musical impressions or sounds, or composite tones, by the conjoint operation oi the dish or diaphragm of metal, vibrated in unison with the clect-ro-magnet in induced currents of electricity.

Intcstimony whereof I hate hereunto sub.

scribed my name.

' dfiblSllA, GRAY.

Witnesses r A. G, SwmrwoU'r, 1). M. EnsKrnE, J1-.

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