US1579895A - Oscillation generator - Google Patents

Description

April 6 ,1926.

f 1,579,895 H. C. SNOOK OSCILLATION GENERATOR Filed June a. 1922 hymn": haze/67.50004;

Patented A r. 6, 1926.

UNITED. STATES PATENT OFFICE.

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or sou'rrr omen, n'nw .mnsnx, ASSIGNOB 'ro wnsrnnn nmcriuc COMPANY, INCORPORATED, OI NEW YORK, N. Y., A CORPORATION 01' NEW YORK.

osornna'rron emmaa'ron.

Application nled June 8, 1922. Serial ll o. 566,724.

To all whom it may concern:

' 'Be it known that I, HOMER CESNOOK, a

citizen of the United States of America,

residing at- South Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Oscillation Generators, of which the following is a-full, clear, concise, and exact description.

This invention relates to a method of and means for generating electric oscillations.-

Briefly described one apparatus for prac ticing the present invention comprises an electric discharge device having main electrodes between which an electron stream is adapted to be established and auxiliary electrodes between which an electron-stream may be produced and controlled by a tuned circuit. Some of the electrons of the auxiliary stream are permitted to discharge into the space between the main electrodes to set up an electrical field or charge-in space for controlling the main electron stream synchronously with the oscillating current flowing in the tuned circuit One object of the present invention is the provision of means whereby-a charge in-space maybe used to control the. space current flow between the electrodes of an electron discharge device. Another object.-

is the provision of means whereby the con-,

trol charge-in-space may be caused to-vary synchronously with an oscillating current wheireby sustained oscillations may be generate These objects and others which appear as the nature of the invention is set forth may be accomplished by means of the arrangement shown in the drawing, the single figure of which illustrates a circuit for practicing this invention.

In this figure the evacuated vessel 1 includes main electrodes, namely a cathode 2 and an anode 3, and auxiliary electrodes, viz, a cathode 4, an anode 5 and a control element or grid 6. The anode 5 is provided with perforations 5. Heating current 'is supplied to the cathode 2 by the source 7 and to the cathode 4 by the .source 8. Potential is supplied to the main anode-3 by the source 9 and to the auxiliary anode 5 by the source 10. Space current from the battery 9 flows through the coil '11 which is coupled to the coil- 1 shunted y the condenser 13 to constitute a. tune frequency determining circuit. The coil 12 and .con-

denser 13 may both be adjustable as indicated by the arrows and by adjusting either the condenser or coil, or both, the constants of the tuned circuit and hence the frequency of the current generated may be changed.

Coupled to the coil 12 is a second coil 14 which is included in the input circuit connecting the cathode 4 and grid 6 of the auxiliary discharge path, whereby the space current discharge to the anode 5 may be controlled. The position of the anode Bend the voltages of the sources 10 and 9 slfould be so related, that the electrons emitted by the cathode 4 will be attracted to the anode 5 rather than directly to the anode 3. Some electrons emitted by the cathode 4 ,will be discharged upon the solid portions of the anode 5, while others will pass through the perforations provided therein and establish an electric field in the space between the main electrodes 2 and 3. i 7

Under operating conditions, oscillations set up in the tuned circuit will react through the coupling 12-14 and iinpres's a fluctuatin potential of a frequency determined by t e constants of the tuned circuit 1213 upon the grid 6. This in turn causes the space curre t between the electrodes 4 and 5 and also the number of electrons discharged from the auxiliary cathode 4 into the space between the main electrodes 2 and 3 to vary synchronously with this control potential; in accordance with the oscillations generated in the tuned circuit will, therefore, be pro duced in the space path between themain electrodes to control the -fiow of current therebetween and if the coupling of coils 11 and 12 is such as to enable the change in current in coil 11 'to induce an aiding electromotive force in coil 12 energy will be supplied to the tuned circuit to maintain the flow of oscillatory current in it. A load circuit may 'be connected-to the oscillatory circuit at the terminals 15.

From the preceding description it will be apparent that a characteristic feature of this invention resides in the use of a varying charge-in-space, which is caused to fluctuate synchronously with variations reduced in a tuned circuit, to control the ow of space current between the cathode and anode of an electron discharge device. I

In passing is noted that the arranga ment described above may be used as an amplifier. By supplying the waves to be amplified to the coil 14 current variations of increased amplitude will flow through the coil 11, to which a circuit of utilization ma be coupled.

lthough a particular circuit arrangement and certain specific. apparatus have been described with the object of completely and clearly disclosing the principles of the invention, it is to be understood that i this invention is not to be limited to the arrangement described, but only by the scope of the appended claims.

What is claimed is.

1. A method of generating oscillations by means of an arrangement including an electron discharge device which comprises eselectric discharge device, means for prod ducing a space discharge within said dovice, means for projecting a stream of electronsinto said space; dischar e and means for controlling the intensity 0 said electron stream.

4. An oscillation generator comprising an electric dischar e device, means for producing a spacesischarge within said device, means for using energy from said space discharge to pro uce oscillations, means for projecting a stream of electrons into said space discharge and means for controlling the intensity of said electron stream in response to the produced oscillations.

5. An oscillation generator comprising an electric discharge device, means for producing" a space discharge within said device, an external circuit for said discharge, a tuned circuit coupled to said external circuit, means for projecting-a stream of electrons into said space discharge and a control circuit for said electron stream, said control circuit being coupled to said tuned circuit 6. An oscillation generator comprising an electric discharge device, means for producing an electric discharge within the device, an external path for said discharge, a tuned circuit associated with said path, means for roducing an auxiliary discharge within said device, a control element for said auxiliary discharge, means coupled to said tuned circuit for impressing a cyclically-varying potential upon said control element and means whereby said first mentioned discharge is controlled solely by the field produced by the auxiliary discharge.

7. An'oscillation generator comprising an electric discharge device, means for producing' a space discharge within the device, means for producing a second space discharge within .said .device, anlcxternal circuit for said first discharge and a control circuit for said second discharge path, a

tuned circuit coupled to said external cir- V cuit and said control circuit, and means whereby the first mentioned'discharge is controlled solely by the field produced by said second discharge; I

8. An oscillation enerator comprising an electric discharge iivice having discharge electrodes and auxili' y electrodes including a control element, means for producing a discharge between said first mentioned electrodes, means for producing adischarge between said auxiliary electrodes, a tuned circuit associated with the first mentioned 'seharge producing means designed to impress-an oscillating potential upon said control element and means whereby the discharge between-the first mentioned electrodes is controlled solely by the field produced by. the discharge between said auxiliary electrodes.

9. An oscillation generator comprising an electric discharge device, a main cathode and anode in sald device, an auxiliary cathode and anode in said device, said auxiliary anode being perforated and the space current path of said first cathode and anode being at an angle to the space current path of said second cathode and. anode, an external connection between said first anode and cathode, a tuned circuit associated with said connection, a control electrode between said second anode and cathode, means coupled to said tuned circuit for impressing a cyclically varying potential upon said control electrode, and an external connection between said second cathode and anode.

In witness whereof, I hereunto subscribe my name this 7th day of June A. D., 1922.

' HOMER C. SN OOK.

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