US1479991A - Electron-discharge device - Google Patents

Description

Jan. 8 1924.

R. W. KING ELECTRON DISCHARGE DEVICE Filed Auz. 13 1919 Patented Jan. 8, 1924.

ROBERT W. KING, OF NEW YORK, N. Y., ASSIGNOR TO INCORPORATED, OF NEW YORK, N.

WESTERN ELECTRIC COMPANY, Y., A CORPORATION OF NEW YORK.

ELECTRON-DISCHARGE DEVICE.

Application filed August 18, 1919. Serial No. 317,814.

To all whom it may concern:

Be it known that I Roena'r W.KING, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Electron- Dischar e Devices, of which the follow ng is a ful clear, concise, and exact description.

The invention relates to improvements in the mounting of electrodes for vacuum tube devices, and by way of example is illustrated and described as embodied in an electron discharge device of the audion type. It has been common in vacuum tube devlces to support one or more of the electrodes from a glass rod or arbor which projects into the tube. The use of a fragile support, such as a glass rod, is objectionable, however, due to the frail character of the support.

An object of the present invention is to avoid, to a large extent at least, the use of a glass supporting structure for an electrode or electrodes to the end that a stronger and more rug ed mounting may be employed instead. his is accomplished, according to the present invention, by providing a metallic supporting connection between the plate electrodes and the press or squash in which the leading-in wires are sealed. The support for the grid and filament is provided in the form of a block of insulating material connected to one of the plate electrodes.

For further details of the invention, reference may be made to the drawing in which the figure illustrates in perspective a vacuum tube embodying the features of this invention. Referring in detail to the drawings, the vacuum tube 1 is provided with the usual inwardly projecting neck 2, which terminates in a press 3 in which the leading-in wires are sealed. The electrodes in this case comprise an M-shaped filament 4. a double grid surface 5, and a double plate electrode 6. Filament 4 is supported at its lower ends by wires 7, 8 and 9, the wires 7 and 9 being extended to rovide terminals for sugplying current to t e filament. The plate ectrode 6 comprises two plate-shaped elements 10 and 11, which have upturned as shown. At the top of or above the, late element 10 is fastened a strip of insulating material 12 which may be of lavite. The block 12 is fastened to the plate 10 by the rods 13 and 14 which are welded to the plate 10 at the lower ends and suitably anchored in apertures in block 12 at their upper ends. The wire 15 fastened in the block 12 and having the coils 16 intermediate its length serves to resiliently support the filament 4, contacting with the bi hts thereof at 17 and 18, as shown.

he grid is supported at its lower end b the wire 19 welded to the grid and exten ing through the press to form a leading-in wire. The upper end of the grid is supported from the block 12 by the wire 20 connected thereto and to the grid, and by a similar wire 21 at the other side of the electrode structure.

The-plate elements 10 and 11 are electrically and mechanically connected together b the wires 22, 23 welded to the upturned e ges of the plate elements, and by similar wires at the other side of the plate electrode. The plate electrode structure is a unitary one and is separated from the press 3 by metallic means such as the U-shaped metal pieces 24, 25, the arms of which are welded to the plate elements 10 and 11. The U-shaped su ports 24 and 25 are suitably fastened to t e press, for instance, by integral extensions 26 and 27 respectivel which extend into and are sealed into the press 3.

This vacuum tube is not limited for use in any particular vacuum tube circuit, but as illustrating one type of circuit that may be employed reference is made to the patent to Arnold 1,129,942, March 2, 1915.

While the electrode supporting features have been shown as applied to electron discharge devices of the audion type, they may be applied to X-ray or other vac-mm tubes.

What is claimed is:

1. A vacuum tube comprising a press, anode, cathode and control electrodes, a forked metallic member mounted on said press and supportingly associated with said anode, and supporting connections between said anode and control electrode. a

2. A. vacuum tube comprising a press, parallel plates, a. plurality of forked metallic members mounted on said press, each arm of each of said members being supportingly associated with each of said plates.

3. A vacuum tube comprising a press, metallic members having arms mounted on said press, the corresponding arms of each memher extending arallel to each other and plates supporte by said arms in parallel relation to each other.

4. A vacuum tube comprising a ress, a cathode, an anode and a grid, sai anode comprising parallel plate surfaces, a plurality of parallel metallic members mounted on said Press, and a plurality of arms projecting rom each of said metallic members, each of said arms being connected to one of said plate surfaces.

5. A vacuum tube comprising a plurality of electrodes one of which is a plate electrode, insulating material supported by said plate electrode above one edge thereof, and a supporting connection from said insulating mate-ma to one of said other electrodes.

6. A vacuum tube comprising a cathode, a grid and an anode, insulating material supported by said anode above one edge thereof,

and supporting connections from said insulating material to said grid and cathode.

7. An electron discharge device comprising a vessel having a stem, an anode supported from said stem, members carried by said anode and projecting beyond one edge thereof, a body of insulating material sup ported by said membeis, a cathode and a supporting connection from said insulating body to said cathode.

In witness whereof, I hereunto subscribe my name this 11th day of August, A. I), 1919.

. ROBERT W. KING.

DiSOLAIMER 1,479,991.Robqt W. King, New York N. Y. Ennc'rnoN' DISCHARGE Dzvxcs. Patent dated-January 8, 1924. Dieciejmer filed August 8, 1931, by the esaignee, Western Electric Company, Incorporated.

Hereby n ers this disclaimer relative to claims 5 and 6 of said Letters Patent to wit: To the eombmatiomof elements set forth in claims 5 and 6 of said Letters Patent, xcept as the surge are embodied in a vacuum tube wherein the insulating materiel is gi -Myer! by an mtervening space from the edge of the plate electrode or anode by w ch 1!; 1a supper [Qflicwl Gazetle September 1, 1931.]

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