US685012A - Means for increasing the intensity of electrical oscillations. - Google Patents

Means for increasing the intensity of electrical oscillations. Download PDF

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US685012A
US685012A US6698000A US1900066980A US685012A US 685012 A US685012 A US 685012A US 6698000 A US6698000 A US 6698000A US 1900066980 A US1900066980 A US 1900066980A US 685012 A US685012 A US 685012A
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oscillations
circuit
intensity
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Nikola Tesla
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00Superconductor technology: apparatus, material, process
    • Y10S505/825Apparatus per se, device per se, or process of making or operating same
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00Superconductor technology: apparatus, material, process
    • Y10S505/825Apparatus per se, device per se, or process of making or operating same
    • Y10S505/856Electrical transmission or interconnection system
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00Superconductor technology: apparatus, material, process
    • Y10S505/825Apparatus per se, device per se, or process of making or operating same
    • Y10S505/869Power supply, regulation, or energy storage system
    • Y10S505/87Power supply, regulation, or energy storage system including transformer or inductor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00Superconductor technology: apparatus, material, process
    • Y10S505/825Apparatus per se, device per se, or process of making or operating same
    • Y10S505/888Refrigeration

Definitions

  • my invention consists in producing a great increase in the intensity and duration of the oscillations excited in-a freely-vibratin g or resonating circuit by maintaining the same at a low temperature.
  • the drawing illustrates in perspective two devices, either of which maybe the transmitter, while the other is the receiver. In each there is a coil of few turns and low resistance,
  • each instrument (designated in one by A and in the other by A ing part of the transmitter,- is. to be connected with a suitable source of current, while the latter is to be included in circuit with a receiving device.
  • a flat spirallywound coil or B In inductive relation to said coils in each instrument is a flat spirallywound coil or B, one terminal of which is shown as connected -to a ground-plate C,while the other, leading from the center, is adapted to be connected to an insulated terminal, which is generally maintained at an elevation in the air.
  • the coils B B are placed in insulatingreceptacles D, which contain the freezing agent and around which the coils A and A are wound.
  • Coils in the form of a flat spiral are eminently suited for the production of free oscillations; but obviously conductors or circuits of any other form may be used, if desired.
  • the means of intensifying and prolonging the electrical oscillations produced in a freely-vibrating circuit consisting of anartificial refrigerant applied to such circuit and adapted to maintain the same at a uniformlylow temperature.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Description

Patented Oct. 22, I90l.
I N. TESLA.
MEANS FOR INCREASING THE INTENSITY OF ELECTRICAL IYISCILLATIONS.
(Application filed Mar. 21, 1900. Renewed July 3, 1901.)
(N0 Model.)
.II IIIIIIIIIIIIII/ II Wz'inesses:
UNITED STATES PATENT OFFICE.
NIKOLA 'TESLA, OF NEW YORK, N. Y.
- MEANS FOR INCREASING THE INTENSITY OF ELECTRICAL OSCILLATIONS SPECIFICATIONforming part of Letters Patent No. 685,012, dated. October 22, 1901. Application filed March 21, IBOOfi-Benewed July 8,1901. Serial No. 66,980. (1T0 model.)
To all whom it ntay concern.-
Be it known. that I,'NIK0LA TESLA, a citizen of the United States, residing at the borough of Manhattan, in the city, county, and State of New York, have invented certain new and'useful Improvements in Means for Increasing the Intensityof Electrical Oscillations, of which the following is a specification,
reference being bad to the drawings accompanying and forming part of the same.
In many scientific and practical uses of electrical impulses or oscillations-as, for example, in systems of transmitting intelligence to distant pointsfiit is of great mportance to intensify as-much as possible tne current impulses or vibrations which are produced in the circuits-of the transmitting and receiving instruments, particularly of the latter.
It is well known that when electrical impulses are impressed upon a circuit adapted to oscillate freely the intensity of the oscillations developed in the same is dependent on the magnitudeof its physical constants and the relation of the periods of the impressed and of the free oscillations. For the attainment of the best result it is necessary that the periods of the impressed should be the same as that of the free oscillations, under which conditions the intensity of the latter is greatest and chiefly dependent on the inductance and resistance of the circuit, being directly proportionate to the former and inversely to the latter. In order, therefore, to intensify the impulses or oscillations excited in the circuit-in other words, to produce the greatest rise of current or electrical pressure in the same-ibis desirable to make its ind nctan'ce as large'and its resistance as small as practicable. Having this end in View I have devised and used conductors of special forms and of relatively very large cross-section; but
l have found that limitations exist in regard to the increase of the inductance as well as to the diminution of the resistance. This will be understood when it is borne in mind that the resonant rise of current or pressure in a freely oscillating circuit is proportionate to the frequency of the impulses and that a large inductance in general involves a slow vibration. On the other hand, an increase of the section of the conductor with the object of reducing its resistance is, beyond a certain electrical oscillations, particularly those of high frequency, pass mainly through the superficial conducting layers, and while it is true that this drawback may be overcome in a measure bythe employmentof thin ribbons, tubes, or stranded cables, yet in practice other disadvantages arise, which often more than offset the gain.
It is a well'established fact that as the temperature of a metallic conductor'r'ises its electrical resistance increases, and in recognition of .this constructors of commercial electrical apparatus have heretofore resorted to many expedients for preventing the coils and other parts of the same from becoming heated when in use, but merely with a View to economizin g energy and reducing the cost of construction and operation of the'apparatus.
Now I have discoveredthat when a circuit adapted to vibrate freely is maintained at a low temperature the oscillations excited in the same are to an extraordinary degree magnified and prolonged, and I am thus enabled to produce many valuable results which have heretofore been wholly impracticable.
Briefly stated, then, my invention consists in producing a great increase in the intensity and duration of the oscillations excited in-a freely-vibratin g or resonating circuit by maintaining the same at a low temperature.
Ordinarily in commercial apparatus such provision is made only with the object of preventing wasteful heating, and in any event its influence upon the intensity of theoscillations is very slight-and practically negligible,
for-as a rule impulses of arbitrary frequency The best and most convenient manner of constructed so'as to have the greatest possible self-induction and the smallest practicable resistance, and other rules of construction which are now recognized should be observed. 'For example, when in a system of transmissiouof energy for any purpose through the natural media the transmitting and receiving conductors are connected to earth, and to an insulated terminal, respectively, the lengths of these conductors should be onequarter of the wave length of the disturbance propagated through them. In the accompanying drawing I have shown graphically. a disposition of apparatus which may beused in applying practically my invention.
The drawing illustrates in perspective two devices, either of which maybe the transmitter, while the other is the receiver. In each there is a coil of few turns and low resistance,
(designated in one by A and in the other by A ing part of the transmitter,- is. to be connected with a suitable source of current, while the latter is to be included in circuit with a receiving device. In inductive relation to said coils in each instrument is a flat spirallywound coil or B, one terminal of which is shown as connected -to a ground-plate C,while the other, leading from the center, is adapted to be connected to an insulated terminal, which is generally maintained at an elevation in the air. The coils B B are placed in insulatingreceptacles D, which contain the freezing agent and around which the coils A and A are wound.
Coils in the form of a flat spiral, such as those described, are eminently suited for the production of free oscillations; but obviously conductors or circuits of any other form may be used, if desired.
From the foregoing the operation of the apparatus will now be readily understood. Assume, first, as the simplest case that upon the coil A of the transmitter impulses .or oscillations of an arbitrary frequency and irrespective of its own free vibrations are impressed. Corresponding oscillations will then be induced in the circuit B, which, being constructed and adjusted, as before indicated, so as to vibrate at the same rate, will greatly magnify them, the increase being directly proportionate to the product of the frequency of the oscillations and the inductance of circuit B and inversely to the r sistance of the latter. Other conditions remaining the same, the intensity of the oscillations in the resonating-circuitB will be increased in the same proportion as its resistance is reduced. Very The former coil, supposed to be form-- often, however, the conditions may be such that the gain sought is not realized directly by. diminishing the resistance of the circuit. .In such cases the skilled expert who applies the invention will turn to advantage the reduotion'of resistance by usipg a correspondingly longer conductor, thus securing a much greater self-induction, and under all circumstances he will determine the dimensions of the circuit, so as to get the greatest valueiof the ratio of its inductance to its resistance, whichdetermines the intensity of the free oscillations. The vibrations of coil B, greatly strengthened, spread to a distance and on reaching the tuned receiving-conductorB' excite corresponding oscillations in the same, which for similar reasons are intensified, with the result of inducing correspondingly stronger currents or oscillations in circuit A, including the receiving device. When, as may be the case in the transmission of intelligible signals, the circuit A is periodically closed and. opened, the effect upon the receiver is heightened inthe manner above described not only because the impulses in the coils B and B are strengthened, but also on ac count of their persistence through a longer interval of time. The advantages offered by the invention are still more fully realized when the circuit A of the transmitter instead of having impulses of an arbitrary frequency impressed upon it is itself permitted to vibrate at its own rate, and more particularly so if it be energized by the freely-oscillating high-frequency discharges of a condenser.- In such a case the cooling of the conductor A,which may be cifected in any'suitable manner, results in tribute to the increased intensity as well as greater number of the high-frequency oscillations obtained in the circuit A. The receivingcoil B is energized strongenin proportion and induces currents of greater intensity in the circuit A. It is evident from the above that the greater the number of the freely-vibrating circuits which alternately receive and transmit energy from one to another the greater, relatively, will be the gain secured by applying my invention.
I do not of course intend to limit myself to the specificmanner and means described of artificialcooling, nor to the particular forms and arrangements of the circuits shown. By taking advantage of the facts above pointed out and of the means described I have found it possible to secure a rise of electrical pressure in an excited circuit very many times greater than has heretofore been obtainable, and this result makes it practicable, among other things, to greatly extend the distance of transmission of signals and to exclude much than has been possible heretofore.
Having now described my invention, what I claim is-- 1. The combination with acircuit adapted an extraordinary magnification of the oscilla-. tion in the resonating-circuit B, which I at-- more effectively interference with the same;
to vibrate freely, of means for artificiallycooling thesame to a low temperature, as herein set forth.
2; In an apparatus for transmitting or receiving electrical impulses or oscillations, the combination with a primary and a secondary circuit, adapted to vibrate freely in response to the impressed oscillations, of means for artificially cooling the same to a low temperature, as'herein set forth.
8. In a system for the transmission of electrical energy, a circuit upon which electrical oscillations are impressed, and which is adapted to vibrate freely, in combination with a receptacle containing an artificial refrigerant in vvhich said circuit is immersed, as herein set forth.
4. The means of increasing the intensitysisting of an artificial refrigerant combined with and applied to such circuitand adapted to maintain the same at a low temperature.
5. The means of intensifying and prolonging the electrical oscillations produced in a freely-vibrating circuit, consisting of anartificial refrigerant applied to such circuit and adapted to maintain the same at a uniformlylow temperature.
6. In a system for the transmission of energy, a series of transmitting and receiving circuits adapted to vibrate freely, in combination with means for artificially maintaining the same at a low temperature, as set forth.
NIKOLA TESLA.
Witnesses:
JOHN C. KERR, M. LAWSON DYER.
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Cited By (76)

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US2704431A (en) * 1949-01-17 1955-03-22 Northrop Aircraft Inc Stable resonant circuit
US2725474A (en) * 1947-12-04 1955-11-29 Ericsson Telefon Ab L M Oscillation circuit with superconductor
US2837725A (en) * 1953-01-22 1958-06-03 Philips Corp Coil system more particularly for highfrequency heating generators
US2866842A (en) * 1953-07-30 1958-12-30 Bell Telephone Labor Inc Superconducting compounds
US3015960A (en) * 1948-12-20 1962-01-09 Northrop Corp Superconductive resonant circuit and accelerometer
US4869598A (en) * 1988-03-11 1989-09-26 Mcdonald Donald G Temperature-sensitive multiple-layer thin film superconducting device
US20060192504A1 (en) * 1998-09-07 2006-08-31 Arzhang Ardavan Apparatus for generating focused electromagnetic radiation
WO2011156555A2 (en) 2010-06-10 2011-12-15 Access Business Group International Llc Coil configurations for inductive power transfer
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US9857402B2 (en) 2015-09-08 2018-01-02 CPG Technologies, L.L.C. Measuring and reporting power received from guided surface waves
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US9887585B2 (en) 2015-09-08 2018-02-06 Cpg Technologies, Llc Changing guided surface wave transmissions to follow load conditions
US9887556B2 (en) 2014-09-11 2018-02-06 Cpg Technologies, Llc Chemically enhanced isolated capacitance
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US9887587B2 (en) 2014-09-11 2018-02-06 Cpg Technologies, Llc Variable frequency receivers for guided surface wave transmissions
US9887558B2 (en) 2015-09-09 2018-02-06 Cpg Technologies, Llc Wired and wireless power distribution coexistence
US9893402B2 (en) 2014-09-11 2018-02-13 Cpg Technologies, Llc Superposition of guided surface waves on lossy media
US9893403B2 (en) 2015-09-11 2018-02-13 Cpg Technologies, Llc Enhanced guided surface waveguide probe
US9899718B2 (en) 2015-09-11 2018-02-20 Cpg Technologies, Llc Global electrical power multiplication
US9912031B2 (en) 2013-03-07 2018-03-06 Cpg Technologies, Llc Excitation and use of guided surface wave modes on lossy media
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US10027131B2 (en) 2015-09-09 2018-07-17 CPG Technologies, Inc. Classification of transmission
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US2725474A (en) * 1947-12-04 1955-11-29 Ericsson Telefon Ab L M Oscillation circuit with superconductor
US3015960A (en) * 1948-12-20 1962-01-09 Northrop Corp Superconductive resonant circuit and accelerometer
US2704431A (en) * 1949-01-17 1955-03-22 Northrop Aircraft Inc Stable resonant circuit
US2837725A (en) * 1953-01-22 1958-06-03 Philips Corp Coil system more particularly for highfrequency heating generators
US2866842A (en) * 1953-07-30 1958-12-30 Bell Telephone Labor Inc Superconducting compounds
US4869598A (en) * 1988-03-11 1989-09-26 Mcdonald Donald G Temperature-sensitive multiple-layer thin film superconducting device
US9633754B2 (en) * 1998-09-07 2017-04-25 Oxbridge Pulsar Sources Limited Apparatus for generating focused electromagnetic radiation
US20060192504A1 (en) * 1998-09-07 2006-08-31 Arzhang Ardavan Apparatus for generating focused electromagnetic radiation
US10110069B2 (en) 2010-06-10 2018-10-23 Philips Ip Ventures B.V. Coil configurations for inductive power transfer
US9054542B2 (en) 2010-06-10 2015-06-09 Access Business Group International Llc Coil configurations for inductive power transfer
WO2011156555A2 (en) 2010-06-10 2011-12-15 Access Business Group International Llc Coil configurations for inductive power transfer
DE102012021514A1 (en) 2011-11-02 2013-05-02 Alf Holger Tschersich Method for converting kinetic energy of working medium e.g. fluid into electric energy, involves generating electric current by operating disc-shaped inductors and by accelerating and activating working medium
US10193394B2 (en) 2012-01-06 2019-01-29 Philips Ip Ventures B.V. Wireless power receiver system
WO2013112526A1 (en) 2012-01-24 2013-08-01 Access Business Group International Llc Wireless power control system
US10187042B2 (en) 2012-01-24 2019-01-22 Philips Ip Ventures B.V. Wireless power control system
US10680306B2 (en) 2013-03-07 2020-06-09 CPG Technologies, Inc. Excitation and use of guided surface wave modes on lossy media
US9910144B2 (en) 2013-03-07 2018-03-06 Cpg Technologies, Llc Excitation and use of guided surface wave modes on lossy media
US9912031B2 (en) 2013-03-07 2018-03-06 Cpg Technologies, Llc Excitation and use of guided surface wave modes on lossy media
WO2015057923A1 (en) 2013-10-17 2015-04-23 Access Business Group International Llc Wireless power communication
US9941566B2 (en) 2014-09-10 2018-04-10 Cpg Technologies, Llc Excitation and use of guided surface wave modes on lossy media
US10224589B2 (en) 2014-09-10 2019-03-05 Cpg Technologies, Llc Excitation and use of guided surface wave modes on lossy media
US10998604B2 (en) 2014-09-10 2021-05-04 Cpg Technologies, Llc Excitation and use of guided surface wave modes on lossy media
US10193353B2 (en) 2014-09-11 2019-01-29 Cpg Technologies, Llc Guided surface wave transmission of multiple frequencies in a lossy media
US9960470B2 (en) 2014-09-11 2018-05-01 Cpg Technologies, Llc Site preparation for guided surface wave transmission in a lossy media
US10084223B2 (en) 2014-09-11 2018-09-25 Cpg Technologies, Llc Modulated guided surface waves
US9893402B2 (en) 2014-09-11 2018-02-13 Cpg Technologies, Llc Superposition of guided surface waves on lossy media
US9887557B2 (en) 2014-09-11 2018-02-06 Cpg Technologies, Llc Hierarchical power distribution
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