US1767245A - Radio transmitting system - Google Patents
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- US1767245A US1767245A US32360A US3236025A US1767245A US 1767245 A US1767245 A US 1767245A US 32360 A US32360 A US 32360A US 3236025 A US3236025 A US 3236025A US 1767245 A US1767245 A US 1767245A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
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- My invention relates to the simultaneous transmission of a plurality of telegraphic or telephonic signals or. messages represented by electro-radiant energies in radio systems, or by carrier Wave currents in "conductor systems, utilizing different frequenciesderived from a single oscillatory source, one or more-of the frequencies being harmonics of the fundamental oscillations produced by the oscillator and one ofthe signals or messages being represented-by electro-rac liz int energy of thefundamental frequency of. the oscillations produced by the oscillator.
- electro radiant energy of the frequencies of the fundamental frequency of oscillations may be utilized, and one or morelharmonics of the fundamental frequency. is or are reinforced and amplified and utilized for transmission of one or more separate and distinctsignals or messages.
- 7 a 1 Further inaccordance with myinvention, there are coupled With the inductance of an oscillatory circuit traversed by oscillations of fundamental frequency one ormore circuits tuned to the desired harmonic-or harmonics, and With each tuned circuit is asso- V ciated suitable amplifying -apparatus, as a scribed.
- thermionic amplifier or a plurality ofithem in staged relation with means for impressing the amplified harmonicupon a'radiating or carrier wave conducting system; and further in accordance .Wliill my invention, a system for radiating or conducting the energy at the fundamental frequencyniay also be coupledto the circuittraversed by oscillations of fundamental frequency.
- r v 1 Fig. 2 is a fragmentary. diagram of a1 modification Wherein'a thern'iionic oscilla-' ing inductance L SAN sRANcIsoo, 'cnnrronnm, A CORPORATION or nAnIo TRANSMITTING sY'sTEr/r" 1925. semi no; 32,3 0.
- G represents a suitable source ofcurjrent, as, for example, a dynamo-electric generator supplying direct current through the high frequency choke coils f, f. to the electrodes P and Nof an arc in shunt to Which are connected thein ductance or common primary L and the condenser C, In; thecircuit L, C will be produced" free: oscillations of fundamental frequencyv dependent practicallyupon theprod: not of the inductance L by the capacity, of-
- the condenser C Coupled to the common primary or inductance is the secondary S connected through-condenser C to earth or ,counter-capaclty E and to the :koy K,
- Coupled ,to i the common primary or inductance L is the" secondary :S ,shunted by the tuning condenser C for tuning the circuit to a suitable harmonic of the funda- Nith the key in the I .into circuit with the secondary S the inmental 'frequency..
- the thermionic amplifier vV, ⁇ vhose anode p circuit is coupled to the antenna A which n Fig.
- K K there may be used microphone transmitters controlling the potentials of the grids of the respective tubes in well known manner, whereby with differentharmonics, reinforced and amplified, several different telephonic messages may be simultaneously transmitted, and simultaneously the fundamental may be utilized for transmitting through the instrumentality of the antenna A
- the anode circuit is not connected directly to the cathode of the tube, but at a suitable point in the secondary 8*, S or S*, thereby rendering the anode circuit electrically symmetrical with respect to the input or grid circuit, preventing the reverse energy flow described, and preventing production of individual oscillations by each of the vacuum tubes.
- a thermionic oscillator as indicated in Fig. 2, which illustrates an oscillator of well known type producing free oscillations by means of the thermionic tube V in whose anode circuit is a port-ion of the inductance L and in whose grid circuit is the remainder thereof, with the condenser C connected across the terminals of the entire inductance L.
- the aforesaid secondaries S S Coupled to the common primary or inductance L are the aforesaid secondaries S S, related, as described in connection with Fig. l, with the several antennae A 'A*.
- each secondary should. be located at such region along the inductance L that there occurs thereat a curwere divided into sections, one foreach secondary El -8 and with greater distributed capacity the production, reinforcement and amplification of harmonics is facilitated.
- the inductance L may be comprised of separate serially connected primaries inductively related, respectively, to the secondaries S, S.
- lVhile I have more particularly referred to the impression of energies of different frequencies upon antennas or radiating structures, for radio systems, it will be understood that inlieu of such antennae there may be utilized conductors extending between transmitting and receiving stations, as in carrier wave telephony, telegraphy and the like.
- the method which comprises producing current of fundamental radio frequency, effecting How of the unamplified current in a current path, reactively coupling to said path-a circuit resonant to a harmonic of said fundamental frequency to encourage development of oscillations of said harmonic frequency in said path, controlling the current of fundamental frequency to represent a signal or message, controlling the oscillations of harmonic frequency to represent. a clifferent signal or message, and impressing upon the natural media disassociated electroradiant energies having, respectively, said fundamental and harmonic frequencies.
- the method which comprises correlating an arc with capacity and inductance to effect production of oscillations of fundamental and harmonic frequencies selecting therefrom oscillations of harmonic frequency, individually controlling the oscillations of fundamental and harmonic frequencies to represent different signals or messages, amplifying the energy of harmonic frequency, impressing upon the natural media electroradiant energy of the amplified harmonic path to said inductance.
- Transmitting apparatus comprising means associated with capacity and inductance to .produce free oscillations of fundamental frequency, means resonant to a harmonic frequency for reinforcing in said inductance oscillations of saidharmonic frequency, means for transmitting a signalor message represented by.
- Transmitting apparatus means associated With capacity and induc fame to produce free oscillations of'funda mental frequency, means resonant to a harmonic frequency for, reinforcing in said inductance oscillations; of said harmonic frequency, said inductance having characteris-v t-icscausing accentuation therein of oscilla tions of harmonic frequency, meansfor am'- plifying the oscillations of harmonic frequency, and means for transmitting a si -V na-l or message represented by the oscillations ofharmonic frequency.-.
- said inductance having characteristiCs causing accentuation therein, of,oscillationsl of har nonic frequency, means for transmitting comprising 7 a signalor message represented by the os-. cillations of harmonic frequency, means for abstracting from said inductance oscillations of fundamental frequency, and means for transmittlngsignalsor messages represented j by sa d oscillatlons of fundamental fre-' qu n' r a 9; Transmitting apparatus comprising an arc, inductance and capacity related to produce oscillations of fundamental frequency, means resonant to a harmonic frequency for reinforcing said inductance oscillations of said'harmonic frequency, means for transmitting a signal or ines sage represented by the oscillations of] harmonic frequency, means for abstracting from said inductance oscillations of fundamental frequency, means for -transmittingsignals or' messages represented y d oscillations of fundamental frequency, and means for preventing reverse energy flow from a transmitting path to said inductance
- inductance having characteristics causing accentuation therein of 'oscillations of harmonic "frequency, means resonant to harmonic frequency for reinforcing insaid nductance oscillations of said harmonic fife quency, meansfor amplifying'the oscillations of harmonic frequency, means for transmitting asignal or message represented by the oscillations of harmonic frequency,"
- Transmitting apparatus comprising Vmeans for producing current of fundamental radio frequency in a circuit," ai'tuned circuit coupledto said'first circuit to'promote there in f and derive therefrom oscillations of harmonic frequency, means individually controlling the oscillations of fundamental and har-; monic frequenciesto represent different signals ormessages, and means for impressing s upon the natural media disassociated electroradiant energies having, respectively, "said fundamental and harmonic frequencieslcomprising independent antenna structures.
- Transmitting apparatus comprising an arc, capacity and inductance associated therewith to effect production of oscillations of fundamental and harmonic frequencies, means directly selecting therefrom oscillations of harmonicfrequency, means individually controlling the oscillations 'of fundamental and harmonic frequencies to represent diiferentsignals or messages, means for amplifying the energy of harmonic frequency, means for impressing upon the natural media electro-radiant energyof the amplified harmonic frequency, and means for impressing upon the natural media electroradiant energy of said fundamental frequency at substantially its original amplitude.
- Transmitting apparatus comprising inductance and capacity correlatedto effect production of free oscillations of fundamental and harmonic frequencies,transmitting circuits resonant to the fundamental and harmonic frequencies, means for magnetically coupling the transmitting circuits'to the inductance to permit transfer of oscillations of selected frequency from the inductance through the transmitting circuits, and means preventing the production of sustained free oscillations in the transmitting circuits.
- Transmitting apparatus comprislng means associated with capacity andflinductance to produce free oscillations of fundamental frequency, a resonant circuit, forabstracting oscillations of harmonic frequency from said inductance, a signaling circuit for utilizing said harmonic frequency oscillations, and a symmetrical connection between said signaling circuit and the resonant circuit arranged to prevent the'feedback of harmonic frequency to said inductance.
- Transmitting apparatus comprising means associated with capacity and inductance to produce free oscillations of fundamental frequency, amplifying means resonant to a harmonic frequency comprising an input circuit magnetically coupled to said inductance and an output circuit normally in energy transfer relation to said input circuit, and means for controlling the extent of such energy transfer in order to prevent the production of individual oscillations in said amplifying means.
- Transmitting apparatus comprising means associated with capacity and inductance to produce free oscillations of fundamental frequency, a circuit resonant to a harmonic frequency magnetically coupled to said inductance, an amplifier comprising an input circuit connected across the resoof individual oscillations in said amplifier are prevented,
- Transmitting apparatus comprising a circuit including inductance and capacity correlated to effect production of oscillations of fundamental and harmonic'frequencies, a transmitting circuit magnetically coupled to said first named circuit and abstracting therefrom oscillations of harmonic frequency, 'a transmitting medium, a thermionic amplifier of the three electrode type intervening between said transmitting circuit and transmitting medium, and a symmetrical connection between the output and input circuits of said amplifier.
- Transmitting apparatus comprising a circuit including inductance and capacity correlated to effect production of oscillations of fundamental and harmonic frequencies, a transmitting circuit magnetically coupled to said first named circuit and abstracting therefrom oscillations of harmonic frequency, a transmitting medium, a thermionic amplifier of the three electrode type intervening, between said transmitting circuit and transmitting medium, a symmetrical connection between the output and input circuits of said amplifier, and means for rendering the input circuit of said amplifier resonant to said harmonic frequency.
- Transmitting apparatus comprising a circuit including an arc and correlated inductance and capacity for'the production of oscillations of fundamental and harmonic frequencies, a structure for radiating energy of the fundamental frequency at substan-' tially its original amplitude, means for controlling the energy of fundamental frequency to represent a signal or message, a second structure radiating energy of harmonic frequency, a thermionic amplifier of the three electrode type having input and output circuits and intervening between said first named circuit and said second radiating structure, a magnetic coupling between the input circuit of said amplifier and said first named circuit, and means intervening between said coupling and said thermionic amplifier rendering the circuit resonant to said harmonic frequency.
- Transmitting apparatus comprising an arc, capacity and inductance associated therewith to effect production of oscillations of fundamental and harmonic frequencies, means directly selecting therefrom oscillations of harmonic frequency, means individually controlling the. oscillations of fundamental and harmonic frequencies to represent different signals or messages, and means comprising independent antenna structures for impressing upon the natural media disassociated electro-radiant energies having, respectively, said fundamental and harmonic frequencies.
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Description
June 24, 1930. F. A. KOLSTER 1,761,245
unto 'rnmsuxwme sYs'rzI Filed May 23. 1925 Mada/am; acv/Ee mvmros WW ATTORNEY Patented June 24, 1930 UNITED STATES PATENT oF icE nnnnnnrcx A. KonsTER, on PALO ALTO, cnmnonnm, 'nssrenon To FEDERAL TELEGRAPH COMPANY, OF CALIFORNIA Application filed May 533,
My invention relates to the simultaneous transmission of a plurality of telegraphic or telephonic signals or. messages represented by electro-radiant energies in radio systems, or by carrier Wave currents in "conductor systems, utilizing different frequenciesderived from a single oscillatory source, one or more-of the frequencies being harmonics of the fundamental oscillations produced by the oscillator and one ofthe signals or messages being represented-by electro-rac liz int energy of thefundamental frequency of. the oscillations produced by the oscillator.
In accordance with my invention, electro radiant energy of the frequencies of the fundamental frequency of oscillations may be utilized, and one or morelharmonics of the fundamental frequency. is or are reinforced and amplified and utilized for transmission of one or more separate and distinctsignals or messages. 7 a 1 Further inaccordance with myinvention, there are coupled With the inductance of an oscillatory circuit traversed by oscillations of fundamental frequency one ormore circuits tuned to the desired harmonic-or harmonics, and With each tuned circuit is asso- V ciated suitable amplifying -apparatus, as a scribed.
thermionic amplifier or a plurality ofithem in staged relation, with means for impressing the amplified harmonicupon a'radiating or carrier wave conducting system; and further in accordance .Wliill my invention, a system for radiating or conducting the energy at the fundamental frequencyniay also be coupledto the circuittraversed by oscillations of fundamental frequency.
My, invention resides in. a method and system of the character hereinafter de- For an understanding of my method and for an illustration of various forms my apparatus may take, reference is to be had to the accompanying ,drawing, in which:
tem for transmitting both fundamental and harmonic frequencies derived from oscillationsproducedby an arc. r v 1 Fig. 2, is a fragmentary. diagram of a1 modification Wherein'a thern'iionic oscilla-' ing inductance L SAN sRANcIsoo, 'cnnrronnm, A CORPORATION or nAnIo TRANSMITTING sY'sTEr/r" 1925. semi no; 32,3 0.
tor is utilized in lieu of the arc of Fig. 1.
Referring to Fig. 1, G represents a suitable source ofcurjrent, as, for example, a dynamo-electric generator supplying direct current through the high frequency choke coils f, f. to the electrodes P and Nof an arc in shunt to Which are connected thein ductance or common primary L and the condenser C, In; thecircuit L, C will be produced" free: oscillations of fundamental frequencyv dependent practicallyupon theprod: not of the inductance L by the capacity, of-
the condenser C Coupled to the common primary or inductance is the secondary S connected through-condenser C to earth or ,counter-capaclty E and to the :koy K,
V. which when depressed engages the contactrls to bring into communication with the secondary S theradiating antenna A provided, if suitable or desirable, With the loadsiti on mentioned, there will be radiated sustained high frequency'energyof'the fundamental frequency produced by the arc. NVhen the key. .israised into; engagement with the upper contact k there is brought duct-ance L condenser C and resistance R, representing a combination of resistance, ca-v pacity and inductance corresponding to that of the antenna A and'itsinductance L, the key beinga-t a position'of potential node inthesystem.
Coupled ,to i the common primary or inductance L is the" secondary :S ,shunted by the tuning condenser C for tuning the circuit to a suitable harmonic of the funda- Nith the key in the I .into circuit with the secondary S the inmental 'frequency.. Assuming the; fundaby the thermionic amplifier vV, \vhose anode p circuit is coupled to the antenna A which n Fig. 1 1S a dlagrammatlc vlew of a sys-' radiates energy of thesixth harmonic frequency, the antenna A being attuned to Similarly, the antennas A and A tuned, respectively, to other harmonics, as, for example, the tenth and thirtieth harmonics, respectively, are supplied by reinforced and amplified harmonics whose energy is derived from the circuit L, C and in which circuit these harmonics are reinforced by the tuned grid circuits of the thermionic amplifiers V and V comprising with the tube V the secondary S and tuning con denser C and for the tube V the secondary S shunted by the tuning condenser C In the grid lead of each of'the tubes V, V and V may be connected suitable key mechanisms K K and K respectively, for controlling the radiated energy in accordance with telegraphic signals.
Obviously, however, in lieu of one or more or all ofthe telegraphic keys 1Q, K K there may be used microphone transmitters controlling the potentials of the grids of the respective tubes in well known manner, whereby with differentharmonics, reinforced and amplified, several different telephonic messages may be simultaneously transmitted, and simultaneously the fundamental may be utilized for transmitting through the instrumentality of the antenna A To prevent energy in any of the antennas A A or A reacting uponthe anode circuit of the associated amplifier tube, and theret-hrough upon the grid circuit and/or through the grid circuit upon the circuit 'L, C, the anode circuit is not connected directly to the cathode of the tube, but at a suitable point in the secondary 8*, S or S*, thereby rendering the anode circuit electrically symmetrical with respect to the input or grid circuit, preventing the reverse energy flow described, and preventing production of individual oscillations by each of the vacuum tubes.
lVhile in Fig. 1 an arc oscillator is shown, it will be understood that any other type of oscillator may be utilized, as, for example, a thermionic oscillator, as indicated in Fig. 2, which illustrates an oscillator of well known type producing free oscillations by means of the thermionic tube V in whose anode circuit is a port-ion of the inductance L and in whose grid circuit is the remainder thereof, with the condenser C connected across the terminals of the entire inductance L. Coupled to the common primary or inductance L are the aforesaid secondaries S S, related, as described in connection with Fig. l, with the several antennae A 'A*.
In the caseof both Fig. 1 and Fig. 2, it will be found desirable properly to locate the secondaries S S and S with respect to each .ot'heralong the common primary or inductance L. In general, each secondary should. be located at such region along the inductance L that there occurs thereat a curwere divided into sections, one foreach secondary El -8 and with greater distributed capacity the production, reinforcement and amplification of harmonics is facilitated. It will be understood, however, that as regards the broader aspects of my invention the inductance L may be comprised of separate serially connected primaries inductively related, respectively, to the secondaries S, S. lVhile I have more particularly referred to the impression of energies of different frequencies upon antennas or radiating structures, for radio systems, it will be understood that inlieu of such antennae there may be utilized conductors extending between transmitting and receiving stations, as in carrier wave telephony, telegraphy and the like.
\Vhat I claim is:
1. The method which comprises producing current of fundamental radio frequency, effecting How of the unamplified current in a current path, reactively coupling to said path-a circuit resonant to a harmonic of said fundamental frequency to encourage development of oscillations of said harmonic frequency in said path, controlling the current of fundamental frequency to represent a signal or message, controlling the oscillations of harmonic frequency to represent. a clifferent signal or message, and impressing upon the natural media disassociated electroradiant energies having, respectively, said fundamental and harmonic frequencies.
2. The method which comprises correlating an arc with capacity and inductance to effect production of oscillations of fundamental and harmonic frequencies selecting therefrom oscillations of harmonic frequency, individually controlling the oscillations of fundamental and harmonic frequencies to represent different signals or messages, amplifying the energy of harmonic frequency, impressing upon the natural media electroradiant energy of the amplified harmonic path to said inductance.
monic frequency with respect toreverse energy flow to a path traversed by'o'scillations" o'fs aid fundamental frequency. Q s s f 4.- The method which comprises cor'relah ing an arc with capacity and inductance to efl ectproduction of oscillationsfof vfundamental frequency, deriving therefromoscil lations of harmonic frequency, "amplifying said oscillations of Lharmomc frequency, transmitt ng a signal or message represented by the oscillations of harmonic"frequency,
by the oscillations er harmonic frequency,
means for abstracting fromlsaid inductance at a different reg on thereofbsc llations of another frequency, said different region being anti-nodal with respect to current cf said other frequency, and means for transmitting signals or messages represented by the oscil; lations of said other frequency. 1
6. Transmitting apparatus "comprising means associated with capacity and inductance to .produce free oscillations of fundamental frequency, means resonant to a harmonic frequency for reinforcing in said inductance oscillations of saidharmonic frequency, means for transmitting a signalor message represented by. theoscillations of harmonic frequency, and means for preventing reverse energy flow froma transmitting 7, Transmitting apparatus means associated With capacity and induc fame to produce free oscillations of'funda mental frequency, means resonant to a harmonic frequency for, reinforcing in said inductance oscillations; of said harmonic frequency, said inductance having characteris-v t-icscausing accentuation therein of oscilla tions of harmonic frequency, meansfor am'- plifying the oscillations of harmonic frequency, and means for transmitting a si -V na-l or message represented by the oscillations ofharmonic frequency.-.
" 8. Transmittin'f apparatus comprising an arc, inductance and capacity related toproduce oscillations .of fundamental,frequency,
said inductance having characteristiCs causing accentuation therein, of,oscillationsl of har nonic frequency, means for transmitting comprising 7 a signalor message represented by the os-. cillations of harmonic frequency, means for abstracting from said inductance oscillations of fundamental frequency, and means for transmittlngsignalsor messages represented j by sa d oscillatlons of fundamental fre-' qu n' r a 9; Transmitting apparatus comprising an arc, inductance and capacity related to produce oscillations of fundamental frequency, means resonant to a harmonic frequency for reinforcing said inductance oscillations of said'harmonic frequency, means for transmitting a signal or ines sage represented by the oscillations of] harmonic frequency, means for abstracting from said inductance oscillations of fundamental frequency, means for -transmittingsignals or' messages represented y d oscillations of fundamental frequency, and means for preventing reverse energy flow from a transmitting path to said inductance. 1
i 10. Transmitting apparatus'comprising an arc, inductance and capacity related to produce oscillations of fundamental frequency,
said inductance having characteristics causing accentuation therein of 'oscillations of harmonic "frequency, means resonant to harmonic frequency for reinforcing insaid nductance oscillations of said harmonic fife quency, meansfor amplifying'the oscillations of harmonic frequency, means for transmitting asignal or message represented by the oscillations of harmonic frequency,"
means fdr abstracting from said inductance oscillationsflof "fundamental frequency, and 7 means for transmitting signals or messages represented by said oscillations of funda mental frequency at substantiallyltheir original amplitude.
11. Transmitting apparatus comprising Vmeans for producing current of fundamental radio frequency in a circuit," ai'tuned circuit coupledto said'first circuit to'promote there in f and derive therefrom oscillations of harmonic frequency, means individually controlling the oscillations of fundamental and har-; monic frequenciesto represent different signals ormessages, and means for impressing s upon the natural media disassociated electroradiant energies having, respectively, "said fundamental and harmonic frequencieslcomprising independent antenna structures.
12. Transmitting apparatuscomprising an arc, capacity. and inductance I associated therewith to'efi'ect production of oscillations of fundamental and harmonic 'frequenc'ies,
. means selecting therefrom oscillations of harmonic frequency, means individually con-' trolling the oscillations of fundamental and harmonic frequenciestorepresent different.
signals or messages and means for, impressing upon the naturalmedia electr'o-radian't energies having, respectively, said funda mental and harmonic frequencies;
l3. Transmitting apparatus comprising an arc, capacity and inductance associated therewith to effect production of oscillations of fundamental and harmonic frequencies, means directly selecting therefrom oscillations of harmonicfrequency, means individually controlling the oscillations 'of fundamental and harmonic frequencies to represent diiferentsignals or messages, means for amplifying the energy of harmonic frequency, means for impressing upon the natural media electro-radiant energyof the amplified harmonic frequency, and means for impressing upon the natural media electroradiant energy of said fundamental frequency at substantially its original amplitude.
14. Transmitting apparatus comprising inductance and capacity correlatedto effect production of free oscillations of fundamental and harmonic frequencies,transmitting circuits resonant to the fundamental and harmonic frequencies, means for magnetically coupling the transmitting circuits'to the inductance to permit transfer of oscillations of selected frequency from the inductance through the transmitting circuits, and means preventing the production of sustained free oscillations in the transmitting circuits. 1
15. Transmitting apparatus comprislng means associated with capacity andflinductance to produce free oscillations of fundamental frequency, a resonant circuit, forabstracting oscillations of harmonic frequency from said inductance, a signaling circuit for utilizing said harmonic frequency oscillations, and a symmetrical connection between said signaling circuit and the resonant circuit arranged to prevent the'feedback of harmonic frequency to said inductance. q i
16. Transmitting apparatus comprising means associated with capacity and inductance to produce free oscillations of fundamental frequency, amplifying means resonant to a harmonic frequency comprising an input circuit magnetically coupled to said inductance and an output circuit normally in energy transfer relation to said input circuit, and means for controlling the extent of such energy transfer in order to prevent the production of individual oscillations in said amplifying means. 17. Transmitting apparatus comprising means associated with capacity and inductance to produce free oscillations of fundamental frequency, a circuit resonant to a harmonic frequency magnetically coupled to said inductance, an amplifier comprising an input circuit connected across the resoof individual oscillations in said amplifier are prevented,
18. Transmitting apparatus comprising a circuit including inductance and capacity correlated to effect production of oscillations of fundamental and harmonic'frequencies, a transmitting circuit magnetically coupled to said first named circuit and abstracting therefrom oscillations of harmonic frequency, 'a transmitting medium, a thermionic amplifier of the three electrode type intervening between said transmitting circuit and transmitting medium, and a symmetrical connection between the output and input circuits of said amplifier.
19. Transmitting apparatus comprising a circuit including inductance and capacity correlated to effect production of oscillations of fundamental and harmonic frequencies, a transmitting circuit magnetically coupled to said first named circuit and abstracting therefrom oscillations of harmonic frequency, a transmitting medium, a thermionic amplifier of the three electrode type intervening, between said transmitting circuit and transmitting medium, a symmetrical connection between the output and input circuits of said amplifier, and means for rendering the input circuit of said amplifier resonant to said harmonic frequency.
20. Transmitting apparatus comprising a circuit including an arc and correlated inductance and capacity for'the production of oscillations of fundamental and harmonic frequencies, a structure for radiating energy of the fundamental frequency at substan-' tially its original amplitude, means for controlling the energy of fundamental frequency to represent a signal or message, a second structure radiating energy of harmonic frequency, a thermionic amplifier of the three electrode type having input and output circuits and intervening between said first named circuit and said second radiating structure, a magnetic coupling between the input circuit of said amplifier and said first named circuit, and means intervening between said coupling and said thermionic amplifier rendering the circuit resonant to said harmonic frequency.
21. Transmitting apparatus comprising an arc, capacity and inductance associated therewith to effect production of oscillations of fundamental and harmonic frequencies, means directly selecting therefrom oscillations of harmonic frequency, means individually controlling the. oscillations of fundamental and harmonic frequencies to represent different signals or messages, and means comprising independent antenna structures for impressing upon the natural media disassociated electro-radiant energies having, respectively, said fundamental and harmonic frequencies. I
22. The method which comprises correlat- .quencies.
In testimony whereof I have hereunto aifixed my signature this 19th day of May,
FREDERICK A. KOLSTER.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US32360A US1767245A (en) | 1925-05-23 | 1925-05-23 | Radio transmitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US32360A US1767245A (en) | 1925-05-23 | 1925-05-23 | Radio transmitting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1767245A true US1767245A (en) | 1930-06-24 |
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ID=21864545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US32360A Expired - Lifetime US1767245A (en) | 1925-05-23 | 1925-05-23 | Radio transmitting system |
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| Country | Link |
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| US (1) | US1767245A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2475909A (en) * | 1943-08-18 | 1949-07-12 | Morrison Montford | Multiple reactor filter section |
-
1925
- 1925-05-23 US US32360A patent/US1767245A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2475909A (en) * | 1943-08-18 | 1949-07-12 | Morrison Montford | Multiple reactor filter section |
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