US2006440A

US2006440A - Vacuum tube generator system

Info

Publication number: US2006440A
Application number: US423308A
Authority: US
Inventors: Chireix Henri
Original assignee: CSF Compagnie Generale de Telegraphie sans Fil SA
Current assignee: Thales SA
Priority date: 1926-04-05
Filing date: 1930-01-25
Publication date: 1935-07-02
Anticipated expiration: 1952-07-02
Also published as: NL20201C; DE489942C

Description

y H. CHIREIX 2,006,440

VACUUM TUBE GENERATOR SYSTEM Original Filed April 5, 1926 INVENTOR HENRI CHIRHX ATTORNEY Patented July 2 1935 I I UNITED STATES. PATENT OFFICE y i 2,066,440. f t f VACUUM TUBE .GEN'EaAron SYSTEM Henri Chireix, Paris, France, assignor to. Compagnie Generale de Telegraphic sans FiLParis, France, a corporation of Germany 7 Original application April 5, 1926, Serial No. 99,740, Patent No. 1,755,386yAp1'i1; 22, 19305 Divided and this application January 25, '1930, Serial No. 423,308." In France August 10, 1925 15 Claims; (01.250917) 1 f The present invention relates to improvements in the production of high frequency currents by means of space discharge devices and is a division of my United States Patent Number 1,755,386,

patented April 22, 1930. I

My invention applies to systems of communi cation utilizing pure continuous Waves or modulated continuous waves.

One of the objects of my invention is toim -f prove the overall efficiency of a communication system by increasing the efiiciency of the trans-' mitter itself and the constancy of the wavetrans mitted.

The novel features which I believeto bechar' acteristic of my invention are set forth withparticularity'in the appended claims. My invention itself, however, both as to its *organizationand method of operation will best be understoodby reference to the following description taken in connection with the accompanying drawingfiin which, Ihave shown diagrammatically oneway whereby my invention may be carried into effect; In said drawing modulation is affected by the constant current system or the plate control system. v I v v s 1 Referring to the drawing, 3 denotes a space discharge device having its input and output cir-' cuits coupled in well known manner for the production of oscillations. The condenser 15 and inductance l4 denote'the elements adapted and necessary for the generation in device 3 of continuous waves and current sources I and 2 denote respectively theplate andfilament current sources of device 3. a f

A'second space-discharge device 5 is also con nected so as to draw its plate and filamentfc'urrent from sources I and 2 respectively, said del ice 5 having its anode connected to the anode w of device 3 through a choke coil 4. 3 s ,"Tube 5 through the medium of switch 12 is adapted to either act as a modulator tubeampli' fying signals from a microphone circuit, or as' generator of oscillations. To this end device 5 when switch I2 is in the position I4 has its input and output circuits coupled through the transformer 6 whereby oscillations will be produced at a frequency dependentupon the value of shunted condenser 1. In the figure condenser 8 is intended to provide a negative bias for the grid of device 5. When switch [2 is in the position l3 device 5 acts as a modulator and amplifier tube the. input. circuit of which comprises a micro phone circuit including microphone l0, battery H, and the primary winding of an 'audiot'ranscircuit'of-device 5.

. of'telegraphic signals withmodulated continuput of said modulator circuit and said microformer 9 the secondary of which is in the input Energy may betransmitted through an. an-" tenna system of any desired kindsuch as 24 or utilized in any desired circuit. The utilizing circuit may be coupled to the output circuit of space discharge-device 3 as shown, or in any well known manner.

e The operation of the system is as follows: When the change-over switch is in the lower position'the arrangement is that of a telephony 7 station -modulated by plate control, whereas; when the'switch I2 is in theupper position device 5 becomes a generator of alternating current Whose frequency-may be controlled by condenser 1." The potential set up across the terminals of transformer 6 becomes added to that of the source in the plate circuit of device3. "It is to be clearly understood that there are numerous conceivable modifications of the system the feature resorted tobeing to use a feed back coupling between the grid and the plate circuitsz'of the modulator tube serving normally for" telephony work, with a View to render this valve a 'self generator' of acoustic frequency currents. The frequency being adjustable by the aid of convenient condensers and inductance coils. 1 The'invention not limitedto the particular applications illustrated and that in fact it is adapted to numerous modifications thereof which may be evolved by those skilled in the artwithout departing from the spirit and scope of this invention.

-Iclaim: -f "(L-In a space discharge device transmission systemcomprising a modulator circuit and a'microphone circuit, means for effecting transmission ous waves which" comprises means for alterna tively establishing' a connection between the inphone circuit, or'a back feed connection between the input and output circuits of the modulator circuit for producing audio frequency oscillations therein, means for controlling the frequency of said oscillations, at radiofrequency generator, and means for modulating the radio frequency oscillations produced by said last generator with the audio frequency energy of said modulator .circu'it. s 1 I p p In a'transmission system, a radio frequency oscillation generator, a modulator circuit therefor, said; modulator circuit comprising a space dischargedevice having grid and plate circuits,

comprising an electron discharge device having a plurality of electrodes, the output circuit of said modulator being coupled to an electrode of said electron discharge device oscillator, a microphone circuit, and switchin means adapted in one position to cause said electron discharge device modulator to generate oscillations at a frequency lower than the frequency .of oscillations generated by said high frequency discharge,

device oscillator, whereby the generated rela-' tively low frequency oscillations are applied to an electrode of said high frequency electron dis.- oharge device oscillatorand in another position to place said modulator circuit under control of said microphone circuit.

4. In a system of thecharacter described,1an electron discharge .device oscillation generator having an anode, a cathode and a control electrode, means for regeneratively coupling said electrodes whereby continuous high frequency oscillations are generated by said electron discharge device mcillator, an electron discharge device modulator, said modulator device having an anode, a cathode and a control electrode, means for coupling the anodes of said modulator and said oscillator together in parallel for unidirectional anodepotential, and, means for regeneratively connecting the electrodes 01 said.

modulator device wherebyusaid modulator oscillates at a frequency lower than the frequency of said high frequency oscillatorwhereby the low frequency potential oscillations generated. by said modulatorpotentials are'algebraically added to the anodeelectrode of said electrone discharge device oscillator whereby the high frequency oscillations in the output circuit, of said high frequency oscillator are modulatedinaccordance with the oscillations generated byrsaid modulator. I H i 5. In a radio system of communication. the combination with an antenna and a circuit hay. ing means therein for generating and impressing upon said antenna awaveformcarrier current; of a telephonic circuit including atelephonic transmitter; a signaling circuit including a thermionic valve individual to said wave form carrier. current circuit and serving as a generator of audio frequency signaling current; and means for disconnecting said 'valve from said signaling circuit and associating it with, Said telephonic circuit to serve as ,a. modulator under the control of the telephonic currents.v

6. In a radio system ofcommunication the combination with an antenna and a circuit having means therein for-generating and impressing upon said antenna a wave formcarrier current of a transformer secondary winding in the aforesaid circuit; a telephonic circuit including a, telephonic transmitter; a signaling circuit including apri un ty to the aforesaid transformer secondary winding and a thermionic valve serving asv a generator of audio frequency signaling current;

V phonic transmitter; a signaling circuit including means for producing audio frequency Wave form signaling current; and means for disconnecting said audio frequency Wave producing means from said signaling circuit and associating it with said telephonic circuit to serve as a modulator under the control of the telephonic currents, whereby said carrier current circuit may be alternately associated with said telephonic circuit and with said signaling circuit.

8. In a radio system of communication, the combination with an antenna and a circuit having apparatus therein for generating and im- Dressing upon said antenna a wave form carrier current; of a telephonic circuit including a telephonic transmitter, a signaling circuit including a thermionic valve for producing audio frequency wave form signaling current; and means for disconnecting said thermionic valve from said signaling circuit and associating it with said telephonic circuit to serve as a modulator under the control of the telephonic currents, whereby said carrier current circuit may be associated at will with either said telephonic circuit or with said signaling circuit.

9. In a radio system of communication, the combination with anantenna and a circuit having means therein for generating and impressing upon said antenna a waveform carrier current; of a telephonic circuit including a telephonic transmitter; a signaling circuit including a thermionic valve individual to said wave form carrier current circuit and serving as a generator of audio frequency signaling current; and means for disconnecting said valve from said signaling circuit and coupling it with said telephonic circuit, to serve as an amplifier of the telephonic currents and to impress such amplified telephonic currents as modulations upon said carrier current circuit,

10. In a radio system of communication, the combination, with an antenna and a circuit hav- 1118 means therein for generating and impressing upon said antenna a waveform carrier current, of a transformer secondary winding in said, circuit, a telephonic circuit including a telephonic transmitter and a transformer primary winding, a plurality of transformer windings, the first of which is a. primary to said secondary Winding and the s'econ'd of which is a secondary to said primary' winding, a thermionic valve individual to said wave form carrier current circuit, and means operable at will to selectively connect the input of said valve with either of said plurality of transformer windings.

11. In a radio system of communication, the combination, with an antenna and a circuit having means therein for generating and impressing upon said antenna a wave form carrier current, of a transformer secondary winding in said circuit, a telephonic circuit including'a telephonic transmitter and a transformer primary winding, a plurality of transformer windings, the first of which is a primary to said secondary winding and; the second of which is a secondary to said primary winding, a thcrmionicflvalve individual to said wave form carrier current circuit, and

means operable at will to selectively connect the input of said valve with the first of said plurality of transformer windings and open said telephonic circuit or to connect the input of said valve with the second of said plurality of transformer wind-- ings and close said telephonic circuit.

12. In a radio system of communication, the combination with a utilization circuit and a generator of high frequency currents for impressing said currents upon said utilization circuit, of a telephonic circuit including a microphone, a thermionic valve serving asa generator of oscillations of lower frequency than said first generator connected in circuit with said first generator, and switching mechanism for connecting said valve to said telephonic circuit for changing the characteristic of said valve from a generator of said relatively lower frequency oscillations to a modulator under control of the telephonic currents.

13. In a radio system of communication, the combination with a utilization circuit and a generator for generating and impressing upon said utilization circuit high frequency oscillations, of a telephonic circuit including a telephonic transmitter, a signalling circuit including a thermionic valve individual to said generator and serving as a generator of relatively lower frequency currents, and switching mechanism for disconnecting said valve from said signalling circuit and associating it with said telephonic circuit to serve as a modulator under the control of the telephonic currents.

14. In a radio system of communication, the combination with a utilization circuit and a circuit having means therein for generating and impressing upon said utilization circuit a Wave form carrier current; of a telephonic circuit including a telephonic transmitter; a signaling circuit including a thermionic valve individual to said wave form carrier current circuit and serving as a generator of audio frequency signaling current; and means for disconnecting said valve from said signaling circuit and associating it with said telephonic circuit to serve as a modulator under the control of the telephonic currents.

15. In a radio system of communication, thecombination with a utilization circuit and a circuit having means therein for generating and impressing upon said utilization circuit a wave form carrier current; of a transformer secondary winding in the aforesaid circuit; a telephonic circuit including a telephonic transmitter; a signaling circuit including a primary to the aforesaid transformer secondary winding and a thermionic valve serving as a generator of audio frequency signaling current; and means for disconnecting said valve from said signaling circuit and associating it with said telephonic circuit to serve as a modulator under the control of the telephonic currents.

HENRI CHIREIX.