US723188A - Method of signaling. - Google Patents
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- US723188A US723188A US64522A US1901064522A US723188A US 723188 A US723188 A US 723188A US 64522 A US64522 A US 64522A US 1901064522 A US1901064522 A US 1901064522A US 723188 A US723188 A US 723188A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/10—Polarisation diversity; Directional diversity
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- this invention consists in generating two or more kinds or classes of disturbances or impulses of distinctive character with respect to their effect upon a receiving-circuit and operating thereby a distant receiver which comprises two or more circuits, each of which is tuned to respond exclusively to the disturbances or impulses .of one kind or class and so arranged that the operation of the receiver is dependent upon their conjoint or resultant action.
- the liability of a receiver being afiected by disturbances emanating from other sources, as well as that of the signals or messages being received by instruments for which they are not intended, may, however, be reduced not only by an increased number of the cooperative disturbances or series of impulses; but also by j udicious choice of the same and erder in which they are made to act upon the receiver: 7
- Figures 1 and 2 represent diagrammatically an apparatus and circuit connections employed at the sending and receiving stations, respectively, for the practice of my invention; and Figs. 3, 4, and 5, modified means which maybe employed in the practical application of the invention.
- S S are two spirally-Wound coils or conductors connected with their inner ends to preferably elevated terminals D and D respectively, and with their outer ends to an earth-plate E.
- These two coils, conductors, or systems D S E and D S E have different and suitably-chosen periods of vibration,and, as pointed out in other patents relating to my system of energy and intelligence transmission, their lengths should be' such that the points of maxim um pressure developed therein coincide with the elevated terminals Dv D
- suitably-chosen periods of vibration such periods are meant as will secure the greatest safety againstinterference, both mutual and extraneous.
- the two systems may have electrical oscillations impressed upon them in any desired manner conveniently by energizing them through primaries P and P placed in proximity to them.
- Adjustable ind uctances L and L are preferably included in the primary circuits chiefly for the purpose of regulating the rates of the primary oscillations.
- these primaries P and P surround the coils S S and are joined in series through the inductances L U, conductor F, condensers O and O brushholders B and B and a toothed disk D, which is connected to the conductor F and, if desired, also to the ground-plate E, as shown, two independent primary circuits being thus formed.
- the condensers C and C are of such capacity and the inductances L L are so adjusted that each primary is in close resonance with its secondary system, as I have explained in other patents granted to me;
- the brush-holders B and B are capable independently of angular and, if necessary also of lateral adjustment, so that any desired order of succession or any difference of time interval between the discharges occurring in the twe primary circuits may be obtained.
- the condensers being energized from a suitable source S, preferably of high potential, and the disk D being rotated, its projections or teeth 19 p coming at periodically-recurring intervals in very close proximity to or, as the case may be, in contact with conducting rods or brushes n 07. cause the condensers to be discharged in rapid succession through their respective circuits.
- the two secondary systems D S E and D S E are set in vibration and oscillate freely each at its proper rate for a certain period of time at every discharge.
- the two vibrations are impressed upon the ground through the-plate E and spread to a distance reaching the receiving-station, which has two similar circuits or systems 6 s d and e 8 d arranged and connected in the same manner and tuned to the systems at the sending-station, so that. each responds exclusively to one of the two vibrations produced by the transmitting apparatus.
- the same rules of adjustment are observed with respect to the receiving-circuits, care being furthermore taken that the tuning is effected when all the apparatus is connected to the circuits and placed in position, as any change may more or less modify the vibration.
- Each of the receiving-coils s and s is shunted by a local circuit containing, respectively, sensitive devices a a batteries 1) b adjustable resistances 1" 7' and sensitive relays R R all joined in series, as shown.
- the precise connections and arrangements of the various receiving instruments are largely immaterial and may be varied in many ways.
- the sensitive devices a a may be any of the well-known devices of this kind-as, for example, two conducting-terminals separated by a minute air-gap or a thin film of dielectric which is strained or weakened by a battery or other means to the point of breaking down and gives way to the slightest disturbing influence. Its return to the normal sensitive state may be secured by momentarily interrupting the battery-circuits after each operation or otherwise.
- the relays R R have armatures l P, which are connected by a wire 10 and when attracted establish electrical contacts at c and 0 thus closing a circuit containing a battery Z) and adjustable resistance r and a relay R From the above description it will be readily seen that the relay R will be operated only when both contacts 0 and c are closed.
- the apparatus at the sending-station may be controlled in any suitable manner-as, for instance, by momentarily closing the circuit of the source S, two different electrical vibrations being emitted simultaneously or in rapid succession, as may be desired, at each closure of the circuit.
- the two receivingcircuits at the distant station each tuned to respond to the vibrations produced by one of the elements of the transmitter, affect the sensitive devices a and a and cause the relays R and R to be operated and contacts 0 and o to be closed, thus actuating the receiver or relay R which in turn establishes a contact 0 and brings into action a device a by means of a battery d included in a local circuit, as shown.
- the receiving-station shown in Fig. 2 is supposed to be one requiring no return message; but if the use of the system is such that this is necessary then the two-stations will be similarly equipped, and any wellknown means, which it is not thought necessary to illustrate here, may be resorted to for enabling the apparatus at each station to be used in turn as transmitter and receiver.
- a receiver as R may be made dependent instead of upon two upon more than two such transmitting systems or circuits, and thus any desired degree of exclusiveness or privacy and safety against extraneous disturbances may be attained.
- the apparatus as illustrated in Figs. 1 and 2 permits, however, special results to be secured by the adjustment of the order of succession of the discharges of the primary circuits P and P or of the time intervals between such discharges.
- the action of the relays R R may be regulated either by adjusting the Weights of the levers Z P, or the strength of the batteries U6 or the resistances 1" T or in other well-known ways, so that when a certain order of succession or time interval between the discharges of the primary circuits P and P exists atthe sending-station the levers Z and Z will close the contacts a and c at the same instant, and thus operate the relay R but will fail to produce this result when the order of succession of or the time interval between the discharges in the primary circuits is another one.
- a transmitting system e 8 d is partly shunted by a rotating Wheel or disk D which may be similar to that illustrated in Fig. 1 and which cuts out periodically a portion of the coil or conductor 5 or, if desired, bridges it by an adjustable condenser 0 thus altering the vibration of the system c s d at suitable intervals and causing two distinct kinds or classes of impulses to be emitted in rapid succession by the sender.
- a similar result is produced in the system e s d by periodically short-circuiting, through an induction-coil L and a rotating disk D with insulating and conducting segments, a circuit 19 in inductive relation to said system.
- a system c 5 three distinct vibrations are caused to be emitted by a system c 5 (i this result being produced by inserting periodically a .number of turns of an induction-coil L in series with the oscillating system by means of a rotating disk B with two projections 19 19 and three rods or brushes n placed at an angle of one hundred and twenty degrees relatively to each other.
- the three transmitting systems or circuits thus produced may be energized in the same manner as those of Fig.
- the receiving-station may be provided with two or three cir- .cuits in an analogous manner to that illustrated in Fig. 2, it-being understood, of course, that the different vibrations or disturbances emitted by the sender follow in such rapid succession upon each other that they are practically simultaneous so far as the operation of such relays as R and R is concerned.
- a single circuit may be used also at the receiving-station constructed and arranged like the transmitting-circuits or systems illustrated in Figs.
- the invention is applicable not only in the special manner described, in which the transmission of the impulses is eifected through natural media, but forthe transmission of energy for any purpose and whatever the medium through which the impulses are conveyed.
- What I claim isl.
- the method of operating distant receivers which consistsin producing and transmitting a plurality of kinds or classes of electrical impulses or disturbances, actuating by the impulses or disturbances of each kind or class one of a plurality of circuits tuned to respond to impulses of such kind or class and operating or controlling the operation of a receiver by the conjoint action of two or more of said circuits, as set forth.
- the method of signaling which consists in producing and transmitting a plurality of kinds or classes of electrical impulses ordisturbances, developing by theimpulses of each class a currentin one of aplurality of receiving-circuits tuned to respond exclusively thereto and controlling by means of the conjoint action of such circuits a local circuit, as set forth.
- the method of signaling which consists in producing a plurality of series of impulses or disturbances difiering from each other in character and order of succession, exciting by the impulses of each series one of a plurality of receiving-circuits tuned to respond exclusively thereto and controlling by the conjoint action of such circuits a local circuit, as set forth.
- the method of signaling which consists in producing a plurality of series of electrical impulses of different character, varying the time interval between the emission of such impulses, exciting by the impulses of each series one of a plurality of receiving-circuits tuned to respond exclusively thereto and controlling by the conjoint action of such circuits a local circuit, as set forth.
- the method of transmitting electrical energy for conveying intelligible signals which consists in producing a plurality of electrical impulses of different character, developing by the impulses of each kind a current in one of a plurality of receiving-circuits tuned to respond exclusively thereto, controlling the action or eifect of the transmitted impulses upon the receiving-circuits by varying the character of said impulses, and operating or controlling the operation of a receiver by the conjoint action of two or more of said receiving-circuits, as set forth.
- the method of transmitting electrical energy which consists in producing a plurality of electrical waves orimpulses of diiferent periodicities, Varying the order of transmission of the waves or impulses forming elements of the signal sent, according as one or another receiving-station is to be communicated with where (proper ci rcuit-closing mechanism being provided at each receiving-station) the transmitted signal will be intelligible at and only at the intended receivingstation.
- the method of transmitting intelligence which consists in selecting and associating together in predetermined order of succession two or more electrically-generated impulses of different periodicity, forming elements of signals to be sent, and transmitting such selected impulses with reference to the conjoint action of both or all in the production of a signal at a distant point, substantially as set forth.
- the method of transmitting the message with reference to the intelligible receipt thereof at the desired station which consists in the transmission of electrical waves or impulses of diiferent periodicities in varying order of transmittal by a separate order or grouping of transmittal for each receiving-station.
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Description
No. 723,188. PATENTED MAR. 17, 1903.
N. TESLA.
METHOD OF SIGNALING.
APPLIO 11111111111111111111 1. no nnnn L,
Wm W 7M6, /Z/ mm M zen of the United States, residing in the bor- UNITED STATES NIKOLA TESLA, OF
METHOD OF NEW YORK, N. Y.
SIGNALING.
SPECIFICATION forming part of Letters Patent N 0. 723,188, dated March 1'7, 19b3.
Original application filed July 16, 1900, Serial No. 23,847.
To all whom it may concern;
Be it known that I, NIKOLA TESLA, a citiough of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improvements in Methods of Signaling, of which the following is a specification, reference being had to the drawings accompanying and forming a part of the same.
In certain systems for transmitting intelligible messages or governing the movements and operations of distant automata electrical impulses or disturbances produced by suitable apparatus are conveyed through the natural media to a receiving-circuit capable of responding to the impulses, and thereby effecting the control of other appliances. Generally a special device, highly sensitive, is connected to the receiving-circuit, which in order to render it still more susceptible and to reduce the liability of its being affected by extraneous disturbances is carefully adjusted so as to be in tune with the transmitter. Bya scientific design of the sending and receiving circuits and other apparatus and skilful adjustment of the same these objects may be in a measure'attained; but in long experience I have found that notwithstanding all constructive advantages and experimental resources this method is in many cases inadequate. Thus while I have succeeded in so operating selectively under certain favorable conditions more than one hundred receivers in most cases it is practicable to work successfully but a few,- the number rapidly diminishing as, either owing to great distance or other causes, the energy available in the tuned circuits becomes smaller and the receivers necessarily more delicate. Evidently a circuit however well constructed and adjusted to respond exclusively to vibrations of one period is apt to be affected by higher harmonics and still more so by lower ones. When the oscillations are of a very high frequency, the number of the effective harmonics may be large and the receiver consequently easily disturbed by extraneous influences to such an extent that when very short waves, such as those produced by I'Iertzian spark apparatus,
Divided and this application filed June 14, 1901. Serial (No model.)
are used little advantage in this respect is to be derived from tuning the circuits. It being an imperative requirement in most practical applications of such systems of signaling or intelligence transmission that the signals or messages should be exclusive or private, it is highly desirable to do away with the above limitations, especially in view of the fact which I have observed that the influence of powerful electrical disturbances upon sensitive receivers extends even on land to distances of niany hundreds of miles, and consequently, in accordance with theory, still farther on sea. To overcome these drawbacks and to enable a great number of transmitting and receiving stations to be operated selectively and exclusively and Without any danger of the signals or messages being disturbed, intercepted, or interfered with in any way is the object of my present in vention.-
Broadly stated, this invention consists in generating two or more kinds or classes of disturbances or impulses of distinctive character with respect to their effect upon a receiving-circuit and operating thereby a distant receiver which comprises two or more circuits, each of which is tuned to respond exclusively to the disturbances or impulses .of one kind or class and so arranged that the operation of the receiver is dependent upon their conjoint or resultant action.
By employing only two kinds of disturbances or series of impulses instead of one, as has heretofore been done, to operate a receiver of this kind I have found that safety against the disturbing influences of other sources is increased to such an extent that I believe this number to be amply sufficient in most cases for rendering the exchange of signals or messages reliable and exclusive; but in exceptional instances a greater number may be used and a degree of safety against mutual and extraneous interference attained, such as is comparable to that afforded by a combination-lock. The liability of a receiver being afiected by disturbances emanating from other sources, as well as that of the signals or messages being received by instruments for which they are not intended, may, however, be reduced not only by an increased number of the cooperative disturbances or series of impulses; but also by j udicious choice of the same and erder in which they are made to act upon the receiver: 7
Evidently there are a great many ways of generating impulses or disturbances at any wave length, wave form, number or order of succession, or ofany special character, such as will be capable of fulfilling the requirements above stated, and there are also many ways in which such impulses or disturbances may be made to cooperate and to cause the receiver'to be actuated, and inasmuch as the skill and practical knowledge in these novel fields can only be acquired by long experience the degree of safety and perfection attained will necessarily depend upon the ability and resource of the expert who applies myinvention; but in order to enable the same to be successfully practiced by any person possessed only of the more general knowledge and experience in these branches I shall describe the simplest plan of carrying it out which is at present known to me.
For a better understanding of the subject reference is now made to the accompanying drawings, in which Figures 1 and 2 represent diagrammatically an apparatus and circuit connections employed at the sending and receiving stations, respectively, for the practice of my invention; and Figs. 3, 4, and 5, modified means which maybe employed in the practical application of the invention.
In Fig. 1, S S are two spirally-Wound coils or conductors connected with their inner ends to preferably elevated terminals D and D respectively, and with their outer ends to an earth-plate E. These two coils, conductors, or systems D S E and D S E have different and suitably-chosen periods of vibration,and, as pointed out in other patents relating to my system of energy and intelligence transmission, their lengths should be' such that the points of maxim um pressure developed therein coincide with the elevated terminals Dv D By suitably-chosen periods of vibration such periods are meant as will secure the greatest safety againstinterference, both mutual and extraneous. The two systems may have electrical oscillations impressed upon them in any desired manner conveniently by energizing them through primaries P and P placed in proximity to them. Adjustable ind uctances L and L are preferably included in the primary circuits chiefly for the purpose of regulating the rates of the primary oscillations. In the'drawings these primaries P and P surround the coils S S and are joined in series through the inductances L U, conductor F, condensers O and O brushholders B and B and a toothed disk D, which is connected to the conductor F and, if desired, also to the ground-plate E, as shown, two independent primary circuits being thus formed. The condensers C and C are of such capacity and the inductances L L are so adjusted that each primary is in close resonance with its secondary system, as I have explained in other patents granted to me; The brush-holders B and B are capable independently of angular and, if necessary also of lateral adjustment, so that any desired order of succession or any difference of time interval between the discharges occurring in the twe primary circuits may be obtained. The condensers being energized from a suitable source S, preferably of high potential, and the disk D being rotated, its projections or teeth 19 p coming at periodically-recurring intervals in very close proximity to or, as the case may be, in contact with conducting rods or brushes n 07. cause the condensers to be discharged in rapid succession through their respective circuits. In this manner the two secondary systems D S E and D S E are set in vibration and oscillate freely each at its proper rate for a certain period of time at every discharge. The two vibrations are impressed upon the ground through the-plate E and spread to a distance reaching the receiving-station, which has two similar circuits or systems 6 s d and e 8 d arranged and connected in the same manner and tuned to the systems at the sending-station, so that. each responds exclusively to one of the two vibrations produced by the transmitting apparatus. The same rules of adjustment are observed with respect to the receiving-circuits, care being furthermore taken that the tuning is effected when all the apparatus is connected to the circuits and placed in position, as any change may more or less modify the vibration. Each of the receiving-coils s and s is shunted bya local circuit containing, respectively, sensitive devices a a batteries 1) b adjustable resistances 1" 7' and sensitive relays R R all joined in series, as shown. The precise connections and arrangements of the various receiving instruments are largely immaterial and may be varied in many ways. The sensitive devices a a may be any of the well-known devices of this kind-as, for example, two conducting-terminals separated by a minute air-gap or a thin film of dielectric which is strained or weakened by a battery or other means to the point of breaking down and gives way to the slightest disturbing influence. Its return to the normal sensitive state may be secured by momentarily interrupting the battery-circuits after each operation or otherwise. The relays R R have armatures l P, which are connected by a wire 10 and when attracted establish electrical contacts at c and 0 thus closing a circuit containing a battery Z) and adjustable resistance r and a relay R From the above description it will be readily seen that the relay R will be operated only when both contacts 0 and c are closed.
The apparatus at the sending-station may be controlled in any suitable manner-as, for instance, by momentarily closing the circuit of the source S, two different electrical vibrations being emitted simultaneously or in rapid succession, as may be desired, at each closure of the circuit. The two receivingcircuits at the distant station, each tuned to respond to the vibrations produced by one of the elements of the transmitter, affect the sensitive devices a and a and cause the relays R and R to be operated and contacts 0 and o to be closed, thus actuating the receiver or relay R which in turn establishes a contact 0 and brings into action a device a by means of a battery d included in a local circuit, as shown. But evidently if through any extraneous disturbance only one of the circuits at the receiving-station is affected the relay R will fail to respond. In this Way a communication may be carried on with greatly-increased safety against interference and privacy of the messages may be secured. The receiving-station shown in Fig. 2 is supposed to be one requiring no return message; but if the use of the system is such that this is necessary then the two-stations will be similarly equipped, and any wellknown means, which it is not thought necessary to illustrate here, may be resorted to for enabling the apparatus at each station to be used in turn as transmitter and receiver. In like manner the operation of a receiver, as R may be made dependent instead of upon two upon more than two such transmitting systems or circuits, and thus any desired degree of exclusiveness or privacy and safety against extraneous disturbances may be attained. The apparatus as illustrated in Figs. 1 and 2 permits, however, special results to be secured by the adjustment of the order of succession of the discharges of the primary circuits P and P or of the time intervals between such discharges. To illusirate: The action of the relays R R may be regulated either by adjusting the Weights of the levers Z P, or the strength of the batteries U6 or the resistances 1" T or in other well-known ways, so that when a certain order of succession or time interval between the discharges of the primary circuits P and P exists atthe sending-station the levers Z and Z will close the contacts a and c at the same instant, and thus operate the relay R but will fail to produce this result when the order of succession of or the time interval between the discharges in the primary circuits is another one. By these or similar means additional safety against disturbances from other sources may be attained and, on the other hand, the possibility aiforded of efiecting the operation of signaling by varying the'order of succession of the discharges of the two circuits. Instead of closing and opening the circuit of the source S, as before indicated, for the purpose of sending distinct signals it may be convenient to merely alter the period of either of the transmitting-circuits arbitrarily, as by varying the inductance of the primaries.
Obviously there is no necessity for using transmitters with two or more distinct elements or circuits, as S and S since a succession of waves or impulses of different characteristics may be produced by an instrument having but one such circuit. A few of the many ways which will readily suggest themselves to the expert who applies my invention are illustrated in Figs. 3, 4, and 5. In Fig. 3 a transmitting system e 8 d is partly shunted by a rotating Wheel or disk D which may be similar to that illustrated in Fig. 1 and which cuts out periodically a portion of the coil or conductor 5 or, if desired, bridges it by an adjustable condenser 0 thus altering the vibration of the system c s d at suitable intervals and causing two distinct kinds or classes of impulses to be emitted in rapid succession by the sender. In Fig. 4 a similar result is produced in the system e s d by periodically short-circuiting, through an induction-coil L and a rotating disk D with insulating and conducting segments, a circuit 19 in inductive relation to said system. Again, in Fig. 5 three distinct vibrations are caused to be emitted by a system c 5 (i this result being produced by inserting periodically a .number of turns of an induction-coil L in series with the oscillating system by means of a rotating disk B with two projections 19 19 and three rods or brushes n placed at an angle of one hundred and twenty degrees relatively to each other. The three transmitting systems or circuits thus produced may be energized in the same manner as those of Fig. 1 or in an y other convenient way. Corresponding to each of these cases the receiving-station may be provided with two or three cir- .cuits in an analogous manner to that illustrated in Fig. 2, it-being understood, of course, that the different vibrations or disturbances emitted by the sender follow in such rapid succession upon each other that they are practically simultaneous so far as the operation of such relays as R and R is concerned. Evidently, however, it is not necessary to employ two or more receiving-circuits, but a single circuit may be used also at the receiving-station constructed and arranged like the transmitting-circuits or systems illustrated in Figs. 3, 4., and 5, in which case the corresponding disks, as D D D at the sending will be driven in synchonism with those at the receiving stations as far as may be necessary to secure the desired result; but whatever the nature of the specific devices employed it will be seen that the fundamental idea in my invention is the operation of a receiver by the conjoint or resultant effect of two or more circuits each tuned to respond exclusively to waves, impulses, or vibrations of a certain kind or class produced either simultaneously or successively by a suitable transmitter.
It will be seen from a consideration of the nature of the method hereinbefore described that the invention is applicable not only in the special manner described, in which the transmission of the impulses is eifected through natural media, but forthe transmission of energy for any purpose and whatever the medium through which the impulses are conveyed.
What I claim isl. The method of operating distant receivers which consistsin producing and transmitting a plurality of kinds or classes of electrical impulses or disturbances, actuating by the impulses or disturbances of each kind or class one of a plurality of circuits tuned to respond to impulses of such kind or class and operating or controlling the operation of a receiver by the conjoint action of two or more of said circuits, as set forth.
2. The method of signaling, which consists in producing and transmitting a plurality of kinds or classes of electrical impulses ordisturbances, developing by theimpulses of each class a currentin one of aplurality of receiving-circuits tuned to respond exclusively thereto and controlling by means of the conjoint action of such circuits a local circuit, as set forth.
3. The method of signaling which consists in producing a plurality of series of impulses or disturbances difiering from each other in character and order of succession, exciting by the impulses of each series one of a plurality of receiving-circuits tuned to respond exclusively thereto and controlling by the conjoint action of such circuits a local circuit, as set forth.
4. The method of signaling which consists in producing a plurality of series of electrical impulses of different character, varying the time interval between the emission of such impulses, exciting by the impulses of each series one of a plurality of receiving-circuits tuned to respond exclusively thereto and controlling by the conjoint action of such circuits a local circuit, as set forth.
5. The method of transmitting electrical energy for conveying intelligible signals which consists in producing a plurality of electrical impulses of different character, developing by the impulses of each kind a current in one of a plurality of receiving-circuits tuned to respond exclusively thereto, controlling the action or eifect of the transmitted impulses upon the receiving-circuits by varying the character of said impulses, and operating or controlling the operation of a receiver by the conjoint action of two or more of said receiving-circuits, as set forth.
6. The method of transmitting electrical energy which consists in producing a plurality of electrical waves orimpulses of diiferent periodicities, Varying the order of transmission of the waves or impulses forming elements of the signal sent, according as one or another receiving-station is to be communicated with where (proper ci rcuit-closing mechanism being provided at each receiving-station) the transmitted signal will be intelligible at and only at the intended receivingstation.
7. The method of transmitting intelligence, which consists in selecting and associating together in predetermined order of succession two or more electrically-generated impulses of different periodicity, forming elements of signals to be sent, and transmitting such selected impulses with reference to the conjoint action of both or all in the production of a signal at a distant point, substantially as set forth.
8. In asystem of telegraphy,wherein signals or messages are sent by the use of a plurality of electrical impulses of different periodicities and in a predetermined order of succession, the method of ascertaining at any particular station the particular signal sent to that station, which consists in the selection, to form a signal, of certain transmitted impulses of different periodicities and of a predetermined order of succession to the exclusion of all others, as set forth.
9. The improvement in the art of transmitting electrical energy which consists in operating or controlling a receiving mechanism by a series or group of electrical impulses of difierent periodicities and of a predetermined order of sucession.
10. In a system for the transmission of electrical energy, for sending signals or messages to any one of two or more receiving-stations, the method of transmitting the message with reference to the intelligible receipt thereof at the desired station, which consists in the transmission of electrical waves or impulses of diiferent periodicities in varying order of transmittal by a separate order or grouping of transmittal for each receiving-station.
NIKOLA TESLA.
Witnesses:
M. LAWSON DYER, BENJAMIN MILLER.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US64522A US723188A (en) | 1900-07-16 | 1901-06-14 | Method of signaling. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US2384700A US725605A (en) | 1900-07-16 | 1900-07-16 | System of signaling. |
US64522A US723188A (en) | 1900-07-16 | 1901-06-14 | Method of signaling. |
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US723188A true US723188A (en) | 1903-03-17 |
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US2384700A Expired - Lifetime US725605A (en) | 1900-07-16 | 1900-07-16 | System of signaling. |
US64522A Expired - Lifetime US723188A (en) | 1900-07-16 | 1901-06-14 | Method of signaling. |
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US2384700A Expired - Lifetime US725605A (en) | 1900-07-16 | 1900-07-16 | System of signaling. |
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