US2187172A

US2187172A - Vacuum tube

Info

Publication number: US2187172A
Application number: US166214A
Authority: US
Inventors: Okabe Kinjiro
Original assignee: RCA Corp
Current assignee: RCA Corp
Priority date: 1936-12-06
Filing date: 1937-09-28
Publication date: 1940-01-16
Anticipated expiration: 1957-01-16

Description

Jan. 16,1940. K, B 2,187,172

VACUUM TUBE Filed Sept. 28, 1937 INVENTOR. KINJIRO OKABE Patented Jan. 16, 1940 Lil 'vAo'wM ime Kinjiro Okabe, Ashiy'a, Japan, assign'or t'o'Radio Corporation of America; New York, N. Y., a corporation of Delaware 7 Application September 28, 1937, Serial No. 166,214

In Japan December 6, 1936 Myinventionrelates to-vac'uum tubes havin a particular structure'to which a magnetic field is applied. k I

The main object of my invention ist'o provide qva'cuum tubes or higher efiiciency and greater output, producing ultra short wave or micro wave oscillations.

The invention may be understood more readily from the following detailed description when 10 considered 'in connection withthe accompanying drawing and those features of the invention which are believed to be novel and patentablerwill be pointed out in the claims appended hereto In the, drawing Figure l showsan end view of an 15 electron discharge device made according to'my invention; Figure 2 is a side view of Figure 1; Figures'3 andfi are end and side views of a modification of my invention; Figure 5 is a schematic diagram of an electron discharge device made 20 according to my invention andits associated circuit; Figures 6 and '7 are views of further modifications of an electron discharge device made according to my invention; and Figures 8 and 9" show still further modifications of an electron 55 discharge device made according tomy invention.

Referring now more in detail to the drawing,

it will be seen that the like reference characters are being utilized throughout the drawing to' designate the like parts, that is to say, A, F and S 30 designate respectively anodes on which higher voltages are to be impressed, thermionic cathodes to emitelectrons, and oscillating electrodes kept at zero or negative potentials and to be connected to oscillation circuits, The electrodes are posi- 35 tioned within an exhausted envelope E. T1 to T5 designate terminals of all electrodes while H designates thedirections toward which magnetic fields to. be applied are directed. The magnetic field coil M produces a magnetic field parallel to 40 the cathode and between the cathode and anode.

oscillation circuit and a magnetic field coil. In

50 the state of non-oscillation, if an intensity in the magnetic field exceeds a critical value there may flow substantially no current in A. When the length of the oscillation circuit, voltages, and hot cathode current are adjusted, there may arise II oscillations the wave lengths of which are mostly 9 Claims. I (CIQ250-27) in.

' 'determinedby only and at the same time the current may flow both in S and A. The oscillators having such characteristics operate with high jefiicien'cy. Figures 6 and '7 show an instance in which the Y electrode Sis divided into rings, while Fig. 8 shows an instance in which three groups of such electrodes as shown in Fig. 'l, are arranged side by s de in the axial direction for the purpose-oi increasing the output. Fig. 9 shows a vacuum tube 10 of-water cooling type arranged according to my invention. G are the glass walls; By connecting the wall directly to the anode A the saidanode may be cooled directly from without thereby afior'ding a great output. The oscillation circuits may be formed by connecting between T1 and T2, and between T1 and T2. Y

Summing up, vacuum tubes according to my invention have such features that they will operate with a high efficiency, generating ultrashort waves or micro waves of great output. It will .be readily understood that vacuum tubes of my invention may also be employed for super-v regenerative receiving tubes of ultra-short waves or micro waves.

,What I claim as new and desire to secure by Letters Patent of the United States is:-

'1. An electron discharge device including a thermionic cathode, a cylindrical anode surrounding and coaxial with said cathode, a pair of out put electrodes positioned adjacent one end of said cylindrical anode and closing the end of said anode and lying in a plane transverse to the'axis of said cathode and anode and means for producing only a single magnetic field parallel to and between said cathode and cylindrical anode.

2. An electron discharge device including a thermionic cathode, a cylindrical anode surrounding and coaxial with said cathode, apluralityofsegmental output electrodes positioned adjacent each end of said cylindrical anode and lying in planes transverse to the cathode and said anode, and

means for producing only a single magnetic field to the cathode and said anode, and means for producing only a single'magnetic field parallel to and between said cathode and cylindrical anode.

4. An electron discharge device having-a ther- 5 mionic cathode and a cylindrical anode surrounding and coaxial with said cathode, a pair of ringlike output electrodes positioned adjacent and closing the end of said cylindrical anode and lying in a common plane transverse to the cathode and said anode, and an electromagnetic field producing coil surrounding and coaxial with said cathode and cylindrical anode, for producing a single magnetic field parallel to and between said cathode and cylindrical anode.

5. An electron discharge device having a thermionic cathode and a cylindrical anode surrounding and coaxial with said cathode, a pair of ringlike output electrodes positioned adjacent each end of said cylindrical anode and closing the ends of said cylindrical anode and lying in planes transverse to the cathode and said anode, and an electromagnetic field producing coil surrounding and coaxial with said cathode and cylindrical anode, for producing a single magnetic field parallel to and between the cathode and the anode.

6. An electron discharge device having an elongated thermionic cathode, a plurality of cylindrical anodes surrounding and coaxial with said cathode and disposed longitudinally along said cathode, and a plurality of output electrodespositioned adjacent the ends and between said cylindrical anodes, said output electrodes lying in planes transverse to the axis of the cathode and circular anodes, and means for producing a magnetic field parallel to and between said cathode and cylindrical anodes.

7 An electron discharge device having an elongated thermionic cathode, a plurality of cylindrical anodes surrounding and coaxial with said cathode and displaced longitudinally along said cathode, and a plurality of output electrodes positioned adjacent the ends and between said cyllndrical anodes, said output electrodes lying in planes transverse to the axis of the cathode and circular anodes, and means for connecting said output electrodes in parallel and other means for connecting said circular anodes in parallel, and means for producing a magnetic field parallel to and between said cathode and cylindrical anode.

8. An electron discharge device including a thermionic cathode, a, cylindrical anode surrounding and coaxial with said cathode, a pair of output electrodes positioned adjacent each end of said cylindrical anode and closing the ends of said anode and lying in planes transverse to the axis of said cathode and anode, and means for producing only a single magnetic field parallel to and between said cathode and cylindrical anode, and an oscillating output circuit connected between said output electrodes.

9. An electron discharge device comprising a thermionic cathode, a cylindrical anode surrounding and coaxial with said cathode, a plurality of segmental output electrodes positioned adjacent the end of said cylindrical anode and lying in a plane transverse to the cathode and said anode, an output circuit connected between said output electrodes, and a connection between said output circuit and said cathode, and means for biasing said output electrodes negatively with respect to said cathode and said circular anode positively with respect to said cathode.

KINJIRO OKABE.