US645576A - System of transmission of electrical energy. - Google Patents

System of transmission of electrical energy. Download PDF

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Publication number
US645576A
US645576A US65034397D US1897650343D US645576A US 645576 A US645576 A US 645576A US 65034397 D US65034397 D US 65034397D US 1897650343 D US1897650343 D US 1897650343D US 645576 A US645576 A US 645576A
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United States
Prior art keywords
impulses
energy
coil
terminal
electrical energy
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US65034397D
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English (en)
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Nikola Tesla
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4902—Pulse width modulation; Pulse position modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks

Definitions

  • A is a coil, generally of many turns and of 'a very large diameter, wound in spiral form either about a magnetic core or not, as may be found necessary.
  • C is a second coil, formed of a conductor of. much larger section and smaller IIO transformer.
  • the coilA constitutes the high-tension secondary and the coil 0 the primary of much lower tension of a transformer.
  • a suitable source of current G In the circuit of the primary 0 is included a suitable source of current G.
  • One terminal of the secondary A is at the center of the spiral coil, and from this terminal the current is led by a conductor B to a terminal D, preferably of large surface, formed or maintained by such means as a balloon at an elevation suitable for the purposes of transmission, as before described.
  • the other terminal of the secondary A is connected to earth and, if desired, also to the primary in order that the latter may be at substantially the same potential as the adjacent portions of the secondary,.thus insuring safety.
  • the coil A of relatively-thin wire, constitutes the primary and the coil 0', of thick wire or cable, the secondary of the In the circuit of the latter are included lamps L, motors M, or other devices for utilizing the current.
  • the elevated terminal D is connected with the center. of the coil A, and the other terminal of said coil is connected to earth and preferably, also, to the coil 0 for the reasons above stated.
  • the length of the'thin-wire coil in each transformer should be approximately onequarter of the wave length of the electric disturbance in the circuit, this estimate being based ,on the velocity of propagation of the disturbaiice through the coil itself and the circuit with which it is designed to be used.
  • the rate at which the current traverses the circuit, including the coil be one hundred and eighty-five thousand miles per second then a frequency of nine hundred and twenty five per second would maintain nine hundred and twenty-five stationary waves in a circuit one hundred and eighty-five thousand miles long-and each wave would be two hundred miles in length.
  • I would use a secondary of fifty miles in length.
  • the transmitting apparatus was in this case one of my electrical oscillators, which are transformers of a special type,now well known and characterized by the passage of oscillatory discharges of a condenser through the primary.
  • the source G forming one of the elements of the transmitter, was a condenser of a capacity of about four one-h undredths of a microfarad and was charged from a generator of alternating currentsof fifty thousand volts pressure and discharged by means of a mechanically-operated break five thousand times per second through the primary O.
  • the latter consisted of a single turn of stout stranded cable of inappreciable resistance andof an inductance of about eight thousand centimeters, the diameter of the loop being very nearly two hundred and forty-four centimcters.
  • the total inductance of the primary circuit was approximately ten thousand centimeters, so that the primary circuit vibrated generally. according to adjustment,
  • the high-tension coil Ain the form of a flat spiral was composed of fifty turns of heavilyinsulated cable No. 8 wound in one single layer, the turns beginning close to the primary loop and ending near its center.
  • the outer end of the secondary or high-tension coil A was connected to the ground, as illustrated, while the free end was led to a terminal placed in the rarefied airstratum through which the energy was to be transmitted, which was contained in an insulating-tube of alength of fifty feet or more, within which a barometric pressure varying from about one hundred and twenty to one hundred and fifty millimeters was maintained by means of a mechanical suction-pump.
  • the receivingtransformer was similarly proportioned, the ratio of conversion being the reciprocal of that of the transmitter, and the primary hightension coil A was connected, as illustrated, with the end near the low-tension coil to the ground and with the free end to a wire or plate likewise placed in the rarefied air stratum and at the distance named from the transmitting-terminal.
  • the elevation of the terminals D D it is obvious that it will be determined by a number of things, as by the amount and quality of the work to be performed, by the local I density and other conditions of the atmosphere, by the character of the surrounding country, and such considerations as may present themselves in individual instances.
  • the terminals should be at a greater height, and generally they should always be, if practicable, at altitudes much greaterthan those of the highest objects near them in order to avoid as much as possible the loss by leakage.
  • the high elevation of the terminals, and more particularly of the receivingterminal D may not be necessary, since, especially when the frequency of the currents is very high, a sufficient amount of energy may be collected at that terminal by electrostatic induction from the upper air strata, which are rendered conducting by the active terminal of the transmitter or through which the currents from the same are conveyed.
  • the altitudes required for the transmission of considerable amounts of electrical energy in accordance with this method are such as are easily accessible and at which terminals can be safely maintained, as by the aid of captive balloons supplied continuously with gas from reservoirs and held-in position securely by steel wires or by any other means, devices, or expedients, such as may be contrived and perfected byingenious and skilled engineers.
  • the transmitting as well as the receiving coils, transformers, or other apparatus may be in some cases movable-as, for example, when they are carried by vessels floating in the air or by ships at sea.
  • the connection of one of the terminals of the hightension coil 01' coils to the ground may not be permanent, but may be intermittently or inductively established, and any such or similar modifications I shall consider as within the scope of my invention.
  • transmitting and receiving transformers arranged and. connected as illustrated, the feature of a transmitting and receiving coil or conductor, both connected to the ground and to an elevated terminal and adjusted so as to vibrate in synchronism, the proportioning of such conductors or coils; as abovespecified', the feature of. a receiving-transformer with its primary connected to earth and to an elevated terminal and having the operative devices inits secondary, and other. features or particulars, such as have been deseribed in this specification or will readily 1.
  • the method hereinbefore described of transmitting electrical energy which consists in producing at a-generating-station a very high eleclrical'prcssm'e, conducting the current caused thereby to earth and to a terminal at an elevation at which the atmosphere serves as a conductor therefor, and collecting the current by a second elevated terminal at a distance from the first.
  • the method hercinbetorc described of transmitting electrical energy through the natural media, which consists in producing between the earth and a generator-terminal elevated above the same, at a generating-station, electrical impulses of a sufliciently-high electromotive force to'render the air strata at or near the elevated terminal conducting, causing thereby current impulses to pass through the air strata, and collecting or receiving at a point distant from the generating-station the energy of the current impulses by means of a circuit synchronized with the impulses.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Geophysics And Detection Of Objects (AREA)
US65034397D 1897-09-02 1897-09-02 System of transmission of electrical energy. Expired - Lifetime US645576A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US1897650343A 1897-09-02 1897-09-02
GB189724421T 1897-10-21
CH15542T 1897-10-26

Publications (1)

Publication Number Publication Date
US645576A true US645576A (en) 1900-03-20

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Family Applications (2)

Application Number Title Priority Date Filing Date
US65034397D Expired - Lifetime US645576A (en) 1897-09-02 1897-09-02 System of transmission of electrical energy.
US5780A Expired - Lifetime US649621A (en) 1897-09-02 1900-02-19 Apparatus for transmission of electrical energy.

Family Applications After (1)

Application Number Title Priority Date Filing Date
US5780A Expired - Lifetime US649621A (en) 1897-09-02 1900-02-19 Apparatus for transmission of electrical energy.

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US (2) US645576A (fr)
CH (1) CH15542A (fr)
GB (1) GB189724421A (fr)

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