USRE20506E - Oscillator system - Google Patents

Description

Sept. 14, 1937. v w. SOLLER I Re; 20,506

i OSCILLA'IOR v SYSTEM Original Filed Sept. 25, 1934 f WIMP I i T r our ar 70 OPPOSITE 00/;

. '0 1 qml f 1 g oar/ ar 'INVENTOR.

Q X WATTORNDR? Reiuued Sept. 1937 mrso STATES PATENT OFFICE osclm aron srs'mu Walter Soller, Cincinnati, Ohio, asaignor of onehalf to William H. Woodin, Jr., Tucson, Aria.

Original No. 2,035,514, dated March a1, 1936,

Serial No. 745,401, September 25, 1034. Application :01- reissue September 23,1930, Serial Liv invention relates broadly to oscillation generation systems and more particularly to a circuit arrangement for the production of oscillations employing a cathode ray discharge tube.

This application is a continuation in part of my application Serial Number 690,907, filed September 25, 1933 and entitled Electron tube system.

One of the objects of my invention is to provide an oscillation system in which high speed scanning by an electron beam may, be controlled.

Another object of my invention is to provide an oscillation system in .which a cathode ray 4 tube is employed for the generation of sustained oscillations. I

Still another, objectof my invention is to provide an arrangement of oscillation generator operative over a wide frequency range and employing a cathode ray discharge tube.

A further object of my invention is to provide a deflection type cathode ray discharge tube having means for controlling the electron discharge therein according to the amount oi! the load sup; plied by the oscillation circuit.

Another object of my invention resides in the circuit arrangement for a cathode ray discharge tube employing botha deflection system and a space charge control grid forl.controlling the gsgiellating condition of the cathode ray discharge Other and further objects of my invention reside in 'the'circuit arrangement for an oscillation system employing a'cathode ray discharge tube, as set forth more fully in the specification hereinafter following by reference to the accompanying drawing, in which:

. Figure l diagrammatically and schematically shows one circuit arrangement embodying my invention in which the cathode ray tube is illuspartially in side trated partially in section and elevation; Fig. 2 is a fragmentary planyiew of the cathode ray tube illustrated in Fig. 1 partially broken away to illustrate the arrangement of electrodes therein; Fig. 3 is a cross-sectional view taken on line- 3-3 of Fig. 1 showing the arrangement of anodesyan'd Fig. 4, shows famodifled form of cathode ray tube oscillating circuit Y embodying my invention.

Referring to the drawing in detail, reference 1 .l. designates the envelope of the cathode tube preferably of glass and exhausted to a degree ct vacuumvor fllledw'lth a gasv or vapor 'of composition. Reference character 2) 'a cathodeeiement having heating means such as'fllament' 2 connected to any suitable potential mr usnieads 10 Claims. (Cl. 250-36) shown at Q and connected to terminals HH." A formative anode 5 is arranged in the path of the electron discharge from the cathode 2. formative anode 5 is provided with a substantially rectangular walled aperture 5 through which the electrons are discharged in a beam of substantially rectangular cross-section in an essentially central axis with respect to the plate assembly shown at 8. The plate assembly shown at 8 comprisw anode members 9 and In which are spaced from each other edge to edge by a gap I2.- The oscillation circuit of my invention employs a special transformer indicatedat it having a pair I of primary windings .l5 and I6 and a pair of secondary windings l1 and i8. The primary windings I5 and I5 have their inner ends 'connected together, as indicated at l9, and their remote ends respectively connected to anodes 9 and III. A circuit is provided between cathode 2 and point l9 in the primary circuit through source of potential 20. A connection is taken from cathode 2 through sourceof potential I to the formative anode 5 for impressing upon formative anode 5 a positive potential. The beam of electrons indicated at H is thus projected from'cathode 2 through the positivelycharged formative anode The 5 to the anodes 5 and III, the beam of electrons normally being substantially confined to the gap l2 between the anodes 9 and II. In order to provide for the deflection of the electron beam alternately from one anode to the other, I provide deflection means and a control grid for varying the electron beam according to the output tion of 'the magnetic fleld. The control coils 2l and 22 may or may not be mounted upon a magnetic 'core. In'Fig. 1, I have shown my inven tion as applied to a high frequency oscillatory. .system in which there is no magnetic core structure employed to'support the deflection coils 2| and 22, thus insuring the high frequency opera)- tion of the deflection coils. The secondary winding it of transformer. connects with the oscil-' lation circuit constituted, by magnetic control coils 2| and 22 and condenser 22. In addition to the influence of the deflection coils upon the beam i I, I provide means for varying the electron stream in accordance withthe output load com-- .is connected in a pathextending from cathode 2 through resistance 25and source of potential 26. Source of potential 26 tends to impress a negative potential on control grid 24 but the effective potential on control grid 24 is controlled by the potential drop across resistance 25.' The potential drop acrossresistance 25 is controlled in proportion to the output load which connects with secondary winding H. The output load is connected with terminals 21 which are disposed in circuit with secondary winding I! through resistance element 28. Resistance element 28 connects across the input circuit of a recifier tube 2&1/ Rectifier tube 29 includes heated cathode 29a and plate electrode 2% connected as shown for purposes of rectifying the potential drop across resistance 28. The output circuit of rectifier tube 29 is shunted by condenser 40 which,

in turn, connects with resistance 25 which is of such value that the bias across condenser 40 varies in proportion to variation in thedoad. The alternating current delivered to the output load builds up a potential across resistance 28. The potential across resistance 28 is rectified and delivered to the circuit including resistance 25.

Inasmuch as resistance 25 is in circuit with the space charge control grid 24, the bias impressed upon control grid 24 will change according to the change in potential across resistance 25, which, in, turn, is controlled by the output load.

In this way, the control grid 24 serves to changethe total amount of electrons projected in electron beam II. This prevents the oscillating tube from drawing a large amount of power when only a small load is to be driven. The input'of the and secondary windings 31 and 38. 75,

oscillator will vary with the output in this arrangement. The deflection regeneration system coacts with the space charge control grid system in the generation of and in the control of the required oscillatory energy.

The primary .current is zero when equa amounts of electrons fall on anodes 9 and ID as, for example, in the position of electron beam illustrated in the drawing. As the electron beam II is deflected up, current goes in one direction I through the transformer I4 and as the electron beam-ll is deflected down, current' goes in the opposite direction in transformer l4, thereby Producing alternating current. The frequency of oscillation is controlled by adjusting the value of inductance in windings 2| and 22 and the size of condenser 23.

Fig. 2 illustrates more clearly the arrangement of 'the magnetic coils 2| and 22 with respectto the electron beam II; and Fig. 3 shows the disposition of the elements 9 and ID in the anode assembly 8.

Fig. 4 shows onearrangement for employing a cathode ray discharge tube for the generation of audio frequency oscillations. In this arrangement, I provide a control grid-member 30 in lieu, of the formative anode Sand charge the control grid member 33 at positive potential for controlling the bombardment of anodes! and III by electron beam H. In this arrangement, I pro-.

vide an iron core transformer 34 having primary windings 35 and 3G interconnected at 39 and connected with cathode, 2 through potential source 2!). Primary windings 35 and 36 have their remote ends connected with anodes 9 and I0.

Transformer 34'includes'an iron core structure Secondary winding 38 connectsto the oscillatory system including magnetic control coils 2| and 22 and conof the electron beam up and down causes vaunderstood that modifications may be made and vessel, a plate assembly disposed in alignment plate assembly, and a plurality of means connected with said branch circuits, one of said circuits and said electromagnetic windings for denser 23. Secondary winding 31 connects to the output circuit of the oscillator. Asin the arrangement illustrated in Fig. 1, the deflection riable and alternate excitation of the primary windings 35 and 36 producing alternatingcurrent in output winding 31; The coils 2| and 22 are wound so that the magnetic field is approximately in phase with the primary current through transformer 34. The values of inductances 2| and 22 and condenser 23 are such that audio frequency currents are delivered to the output circuit 31.

"The tube shown in Fig. 4 may be constructed to operate 'as a mercury vapor or ionized gas tube in lieu of the electronic arrangement as shown.

While I have described my invention in certain preferred embodiments, I desire that it be that no limitations upon my invention are intendedother than are imposed by the scope'of the appended claims.

What I claim as newand desire to secure by Letters Patent of the United States is as follows:

1. In acathode ray control system, a closed vessel, a; cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair 'of independent elemerits, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a. source of potential and separate branch circuits leading to the elements of said plate assembly, means coupled with said branch circuits and containing an oscillatory. control device for alternating the effect of said cathode ray with'respect to the elements of said plate assembly, and additional means coupled with said output system for controlling the power input of said discharge device.

2. In a cathode ray control system, aclosed vessel, a. cathode ray discharge device in said with. said cathode ray discharge device, said plate assembly comprising a pair of independent,

elements, means for directing the cathode ray from said device to said plate assembly, an output and including a source of potential and separate means for determining the frequency of oscillations which may be sustained in said circuits, and the other-of said means for controlling the intensity of said cathode ray in accordance with the load on said system. I

3. In a cathode ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray de vice and including a source of potential and separate branch circuits leading to the elements of said plate assembly, a. pair of electromagnetic windings disposed adjacent the path of said cathode. ray, and connections between said branch effecting sustained oscillations in said circuits, and means coupled with said output system for controlling the intensity of said cathode ray in accordance with, the load.'

4. In a cathode ray controlsystem, a closed vessel, a cathode ray discharge device in said vessel, a. plate assembly disposed in alignment with said cathode ray discharge device, .said plate assembly comprising a pair of independent I elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a source of potential and separate branch circuit'sleading to the elements of said plate assembly, an electromagnetic device disposed adjacent the path of said cathode ray and connected with said branch circuits, and

a condenser connected with said electromagnetic device and cooperating therewith in determining the frequency of oscillations sustained by said circuits, and means coupled with said output system for controlling the intensity of said cathode rayin accordance with the load.

5. In a cathode ray control system, a closed vessel, a cathode ray discharge device in said vesselyfa'plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a source of potential and separate branch circuits leading to the elements of said plate assembly, a pair of electromagnetic wind- .ings aligned one with the other and disposed on opposite sides of the path of the cathode ray, said windings being connected with said branch circuits and efiective to deflect said cathode ray,

' a load circuit connected with each of said branch circuits, and means connected with said load cirsuit for varying the intensity of said cathode ray in accordance with the load.

6. In a cathode ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent ele- -ments, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a source, of potential and separate branch circuits leading to the elements of said plate assembly, a pair of electromagnetic windings aligned one with the other and disposed on opposite sides of the path of said cathode ray, said windings being connected with said branch circuits and 'eil'ective to deflect said cathode ray,

I a load circuit inductively coupled with both oi said branch circuits, and means connected with said load circuit for varying the intensity of said cathoderay in accordance with the load.

7. In a cathode ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elemerits, means for directing thecathoderay from said deviceto said plate assembly, an output system connectedwith said cathode ray discharge device and including a source-0f potential and separate branch circuits leading to the elements of said plate assembly, a load circuit, means connected with said load circuit for controlling the intensity of said cathode ray, and means coupled with said branch circuits for controlling the deflecti'ons oi said cathode ray for sustaining oscillations in said load circuit..

8. In a cathode ray control-system, a closed vessel, a'cathode ray discharge device in said vessel, a plate assembly disposed in alignment with saidcathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathoderay' from said device to said plate assembly, an output system connected with said cathode ray discharge device and'including a source of potential and separate branch circuits leading to the elements of said plate assembly, a load circuit, a space charge grid disposed in the path of said cathode ray within said vessel, means connected between said load circuit and said space charge grid for controlling said cathode ray in accordance'with the operation of said load circuit, and means connected with said load circuit and disposed adjaand including a. source of potential and separate branch circuits leading to the elements of said plate assembly, a load circuit coupled with said branch circuits for receiving oscillatory current from said branch circuits, a resistance element connected in saidload circuit, a) rectifier element and a second resistance element ,connected in series across said first mentioned resistance element, a space charge control grid disposed in said vessel, a connection from one end of said second resistance element to said space charge control grid and a connection from the other end of said second resistance element to said cathode ray discharge device whereby said grid is biased for controlling saidcathode ray in accordance with the load in said load circuit, and means coupled with said load circuit and disposed adjacent the path of said cathode ray for controlling said cathode ray. and load circuit. a

10. In a cathode ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements,means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray device and including a source of potential and separate branch circuits leading to the elements of said plate assembly, a load circuit coupled with said branch circuits, a space charge control grid in said vessel, means for normally biasing said space charge control grid, and means for deriving an 1 additional potential i'rom said load circuit for, controlling the operation of said space charge control gridlin accordancewith the load connected with said load circuit.

11. In a cathode ray control system, a closed vessel, a cathode ray discharge device insaid vessel, a plate assembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode ray from said device to said plate assembly, an output system connected with said cathode ray discharge device and including a source of potential and separate branch circuits leading to the elements sustaining oscillations in said of said plate assembly, a load circuit coupledwith said branch circuits, a space charge control grid in said vessel, means for normally biasing said space charge control grid, means for deriving an additional potential from said loadcircuit for controlling the operation ot'said space charge control grid in accordance with the load connected with said load circuit, andmeans con- 1 nected with said load circuit and disposed adjacent the path of said cathode ray for sustaining oscillations in said load circuit.

12. In a cathode ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plateassembly disposed in alignment with said cathode ray discharge device, said plate assembly comprising a pair of independent elements, means for directing the cathode rayfromv said device to said plate assembly, an output system connected with said cathode ray device and including a source of potential and separate.

branch circuits leading to the elements of said plate assembly, a load circuit coupled with said branch circuits, a space charge control grid in said vessel, means for normally biasing said space charge control grid, means for deriving an additional potential from said load circuit for'controlling the operation of said space charge control grid in accordance with the load connected with said load circuit, and electromagnetic devices disposed on opposite sides of the path of said cathode ray and coupled with said load circuit and coacting with the operation of said branch circuits for sustaining oscillations in said load circuit. v

13. An electron tube system comprising an enclosing vessel, a cathode ray discharge device in said vessel, 9. plate assembly disposed in alignment with said cathode ray discharge device, means tor directing an electron beam from said cathode ray discharge device to said plate assembly,,means for controlling the deflection of the electron beam with respect to said plate,assem-,' bly, a load circuit coupled with said plate assembly, a space charge grid disposed in the path of said electron beam, means for impressing a bias potential on said grid, and means for controlling the potential on ,saidgrid in accordance with the current in said load circuit for controlling the i intensity of the electron beam. 14. An electron tube system comprising an enclosing vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device, means for directing an electron beam from said cathode ray discharge device to said plate as'sembly, means for controlling the deflection of the electron beam with ,respect to said plate'assembly, a space charge grid disposed in the path of said electron beam, and means for controlling the potential on said grid in accordance with load conditions on said system for correspondingly controlling the intensity of the electron bcam. I y r 15, In a cathode, ray control system, a closed vessel, a cathode ray discharge device in said vessel, a plate assembly disposed in alignmentwith said cathode ray discharge device and adapted to receive the electrons emitted therefrom, an output system connected with-said cathode ray discharge device and said plate assembly, a load circuit coupled with said output system, means energized from said'output system a for deflectingsaid cathode ray, and means energized from said load circuit'for varying the intensity of said cathode ray.

16. In a cathode ray control system, a closed vessel, acathode ray. discharge device in said vessel, a plate assembly disposed in alignment with said cathode ray discharge device and adapted to receive the electrons emitted therefrom, an output system connected with said cathode ray discharge device and said plate assembly, a load circuit coupled with said output system, and means energized from said load circuit for varying the intensity ofis'aid cathode ray.

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