US1537609A - Arc transmission system - Google Patents

Description

May 12, 1925. 1,537,609

J. V. L. HOGAN ARC TRANSMISSION SYSTEM Filed May 19, 1922 FP/tr. L?

Aw Z0 Bub/er Z! INVENTOR Z ZZZ 02/1/11. L. Hogan. /M% I ATTORNEY May 12, 15925.

UNITED STATES PATENT OFFICE,

JOHN V. L. HOGAN, OF NEW YORK, N. Y'., ASSIGNOR T WESTENGHOUSE ELECTRIC 82; MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

ARC TRANSMISSION SYSTEM.

Application filed May 19, 1922'.

To all 107mm it may concern:

Be it known that I, JOHN V. L- HOGAN, a citizen of the United States, and a resident of New York city, in the county of New York and State of New York, have invented a new and usefulImprovement in Arc Transmission Systems, of which the following is a specification.

lily invention relates to wireless telegraphy and particularly to wireless trans mission systems.

An important object of my invention is to provide a wireless transmission system embodying a non-sinusoidal generator and having means for utilizing not only the energy of the fundamental but also that of one or more harmonics.

its is well known, certain types of generators, such, for example, as are oscillators, are extremely inefficient when operating' on short wave lengths.

According to my invention, I provide means for utilizing such. energy as is emcbodied in the harmonics of non-sinusoidal generators and for so combining the same with that of. the fundamental frequency as to apply, to a radiating circuit, the full power of the several frequencies.

The desired result may be accomplished by employing one harmonic as the signai 'rrequency and so modifying the frequencies and phases of the fundamental and of the remaining harmonics, if any, as to correspond to the signal frequency.

Other objects and applications ofmy invention, as well as details of construction and oieration whereby my invention may he practised, will be apparent from. the following description and claims when taken in connection with the accompanying; drawing. wherein Figure 1 is a diagran'unatic view of circuits and apparatus embodying my invention:

Fig. 2 is a similar view of a modification. 7

In F 1 an are 1 is shown as energized from a direct-current generator 2 through cholze coils The are 1 may be maintained in an oscillatory'condition by means of an osciilatory circuit 4 which is shunted therearound and which includes inductance coils 5 and 6 and a condenser 7 for determining the fundamental oscillation frequency of the are 1.

Serial No. 562,072.

A radiating or work circuit 8, the period of which is adjusted to resonate with the second harmonic of the are 1, comprises an antenna 9, a tuning inductance coil 11, a coupling coil 12, which is operatively associated with the inductance coil 5 of the oscillatory circuit 41, a coupling coil l3 and a ground conductor 14:.

A frequency doubler 15, of well known form, having an input circuit 16 and an output circuit 17, serves to connect the tundra mental oscillatory circuit 1 to the antenna circuit 8. The input circuit 16 of the frequency doubler comprises a condenser-18 and a coupling coil 19, the latter being operatively associated with the coupling coil 6 of the fundamental oscillatory circuit 4-. The output circuit 17 comprises a condenser, 20 and a coupling coil 21, the latter being operatively associated with the coupling coil 13 of the antenna circuit.

A variable resistor 22 may be included in the input circuits 16 of the frequency multipliers 15 and 29 to provide for the adjust-- ment of the relative phase relations of the currents directly impressed upon the antenna'system and those impressed thereon indirectly through the frequency multipliers. j I

The. system shown in Fig. 2 is distinguished from that ofFig. 1 in that'the' source 1 of high-frequency oscillations has been. replaced by ahiglr-frequency alternator 23, wherein one ofthe harmonics, say the third, is strongly predominant. A fur.- ther modification consists in the provision of a plurality of circuits 24 and 25 which are energized therefrom and which may be. tuned to the fundamental frequency and'to the third harmonic, respectively, by means of coupling coils 26 and 27 and condensers 28 and29. The tuned circuit 25, which is resonant to the third harmonic and the antenna circuit 8, which is also resonant to said harmonic, are operatively associated by coupling coils 27 and-12. The tuned circuit 21, which is resonant tothe fundamental generator frequency, is operatively associated with the antenna circuit through a frequency tripler 29, in the manner indicated in Fig. 1, Other elements common to the two figures are primed in Fig. 2, where triple-frequency circuits are employed.

In operation, the arc 1 generates a nonsinusoidal current having a strong second through ever, the energy of the fundamental frequency, in order to be absorbed by the antenna circuit, is caused to pass through the frequency-doubler system 15 and is then impressed upon the antenna circuit. Thus, the energies of the two frequencies are combined in arsingle frequency in the antenna circuit.

The broad application of my invention to other non-sinusoidal generators than the arc is illustrated in Fig. 2 employing a radio frequency alternator in which the third harmonic predominates. The operation of this system is otherwise as indicated for that of Fig. 1.

While I have shown means for utilizing the energy of a single harmonic only, it is apparent that the energy of a plurality of harmonics may be utilized by employing a suitable arrangement of frequency multi pliers.

While I have shown only two embodiments of my invention for the purpose of describing the same and illustrating its principles, it is apparent that various changes and modifications may be made therein without departing from the spirit and scope of my invention. I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or are specifically set forth in the appended claims.

I claim as my invention:

1. The method of increasing the output of a non-sinusoidal generator which consists in multiplying the frequency of the main wave and feeding the multiplied frequency substantially in phase with a harmonic of the output of said generator. 7

2. The method of increasing the output of a source of non-sinusoidal currents resolvable into a plurality of sinusoidal currents of different frequencies in Fouriers series which consists in deriving energy from a plurality of such sinusoidal currents and converting the frequenciesof said currents in such manner that all of the same feed a common Work circuit at the same frequency.

3. The method of increasing the output of an arc oscillation generator which consists in doubling the frequency of the fundamental and causing the resulting currents to assist the second harmonic in supplying a common load.

4. The method of energizing a high-frequency circuit which consists in generating currents at a plurality of frequencies, translating certain of said generated currents into currents of a frequency like that of certain other of said currents and supplying currents at the common frequency to said high-freque1icy circuit.

5. The combination with a source generate ing currents of different frequencies, of frequency-transforming means fed by one of said generated currents and converting the same into secondary currents having the frequency of another of said generated currents, and a common load circuit upon which both currents of said common frequency are impressed.

6. The combination with a source generating fundamental and harmonic currents, of frequency-transfo-rming means fed by one of said generated currents and converting the same into secondary currents having the frequency of the other of said generated currents, a common load circuit upon which both currents of said common frequency and means for adjusting the relative phase relations of said currents of common frequency are impressed.

7 The combination with a source of nonsinusoidal currents resolvable into a plurality of sinusoidal currents of different frequencies in Fouriers series, of means for deriving energy from a plurality of such sinusoidal currents and converting the fre quencies of said currents in such'manner that all of the same feed a common Work circuit at the same frequency.

8. The combination with an arc oscillation generator, of an energy-translating device having its input tuned to the fundamental of said generator and energized therefrom, said device delivering energy at a frequency equal to a harmonic of said generator and a work circuit tuned tOi said harmonic and energized from both said generator and said device.

9. The combination with an arc oscillation generator providing currents of differ ent frequencies including a secondary harmonic, of a work circuit coupled thereto and carrying currents corresponding to the second harmonic, and a translating device absorbing currents of another frequency from said are generator and supplying currents having the frequency of the second harmonic to assist said currents in the work circuit.

10. In a high-frequency electrical system, the combination with a relatively low-frequency source of non-sinusoidal currents, of I a work circuit deriving currents therefrom at a relatively high frequency, frequencymultiplying means for converting currents of lower frequency from said source into currents having the frequency of said workv circuit currents means for impressing said converted currents on the work-circuit and means for adjusting the phase relations of the currents supplied to said Work-circuit.

11. In an electrical system, a generator of non-sinusoidal alternating electromotive forces, frequency converting apparatus hav ing input and output clrcuits, said input circuit being associated with said generator, and a translating device operatively associated with said generator and with said frequencyconverter output circuit.

12. In an electrical system, a generator of non-sinusoidal alternating electromotive forces, acircuit operatively associated with said generator, frequency converting means having input and output circuits, said input circuit being operatively associated with said first-mentioned circuit, and an outgoing circuit operatively associated with said first-mentioned circuit and with said output circuit.

15 In an electrical system, a generator of non-sinusoidal alternating electromotive forces, a tuned circuit operatively associ-' ated with said generator, frequency converting means having input and output circuits, said input circuit being operatively associated with said tuned circuit, and an energy consuming circuit operatively asso ciated with said tuned circuit and with said output circuit, said energy consuming circuit being tuned to the frequency of said output circuit.

14. In an electrical system, a generator of non-sinusoidal alternating electromotive forces, a pair of circuits operatively associated with said generator and absorbing energy at different frequencies, frequency converting means having input and output circuits, said input circuit being operatively associated with one of said pair of circuits and a work circuit operatively associated with the remaining circuit in said pair and with said output circuit.

15. In an electrical system, a generator, a plurality of circuits operatively associated therewith and absorbing energy at dif ferent frequencies, a work circuit operatii'ely associated with one of said plurality of circuits, and frequency-changing means operatively connecting the remaining circuits in said plurality of circuits with said work circuit, whereby currents of common frequency may be supplied to said work circuit.

16. In an electrical system, a generator, a plurality of tuned circuits absorbing energy therefrom at different frequencies, an outgoing circuit operatively associated with one of said first-mentioned circuits and resonant to the frequency thereof, and frequencycl1a11gi11g means operatively connecting the remaining tuned circuits in said plurality of circuits with said outgoing circuit, whereby currents of common frequency may be supplied to said outgoing circuit by said plurality of circuits.

1?. In a wireless transmission system, the combination with a non-sinusoidal generator of radio-frequency currents, of a plurality of tuned circuits absorbing energy therefrom at different frequencies, a radiating circuit directly associated with one of said plurality of circuits and resonant to the frequency thereof and frequencychanging means for operatively associating the remaining circuits in said plurality of circuits with said radiating circuit, whereby currents of common frequency may be supplied to said radiating circuit by said plurality of circuits.

18. In an electrical system, an are, means for causing said are to oscillate, frequency converting apparatus having input and output circuits, said input circuits being associated with said means, and a radiating circuit operatively associated with said means and with said output circuits, whereby currents of common frequency may be supplied to said radiating circuit by said arc.

19. 111 an electrical system, an arc, means for causing said are to serve as a generator of oscillatory currents, said currents comprising a fundamental and harmonics, a work circuit associated with said means and resonant to one of said harmonics, and means associated with said first-mentioned means and said work circuit, whereby the energy in certain of said remaining harmonics or said fundamental may be utilized by said work circuit.

20. In an electrical system, an arc, a tuned circuit including said are, whereby radio-frequency currents may be generated, said currents comprising a fundamental and harmonics, a work circuit associated with said tuned circuit and absorbing energy therefrom at a frequency corresponding to one of said harmonics, and frequency translating means operatively connecting said tuned circuit and said work circuit, whereby the energy in said remaining harmonics and said fundamental may be supplied to said work circuit at a frequency resonant with said work circuit.

21. In a wireless transmission system, an arc, a plurality of tuned circuits associated therewith absorbing energy at diifer ent frequencies, said frequencies comprising a fundamental and harmonics, a radiating circuit associated with one of said circuits and resonant to the frequency thereof, and frequency translating devices operatively connecting the remaining circuits and said radiating circuit, whereby the energy in said remaining frequencies may be absorbed by said radiating circuit.

In testimony wherof, I have hereunto subscribed my name this 12th day of May JOHN V. L. HOGAN.

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