US1799850A

US1799850A - Electron-discharge device

Info

Publication number: US1799850A
Application number: US217565A
Authority: US
Inventors: William F Hendry
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1918-02-16
Filing date: 1918-02-16
Publication date: 1931-04-07
Anticipated expiration: 1948-04-07

Description

. w. F. HENDRY 'ELECTRON DISCHARGE DEVICE f original Filed'Feb. le, 1918 Patented Apr. 7, 1931 UNITED STATI-:s

PATENT OFFICE WILLIAM F. HENDRY, OF

x NEW YORK, N. Y., ASSIGNOR TO WESTERN ELECTRIC COM- IEANY, INCORPORATED, OF NEW YORK,

N. Y., A CORPORATION OF NEW YORK ELECTRON-DISCHARGE DEVICE Application filed February16, 1918, Serial No. 217,565. Renewed August 20, 1924.

.This invention relates to electron discharge devices, and more particularly to three-electrode vacuum tubes, and-has as an object the improvement of the 'electrode supporting and electrode structure.

An electron dischargedevice of this type comprises a gas tight vessel in which there are usually enclosed a cathode or filament, an anode, usually in the form of a plate, and a grid. In some cases it has hitherto been found convenient to support these electrodes.

' trodes therefrom, thereby obtaining a rigid and Xed organization of the electrodes.

This invention will be better understoood by reference to the following description, taken in connection with the accompanying drawings, in which Fig. 1 illustrates one form of this invention; Fig. 2 represents a modication thereof; and Fig. 3 shows how this invention may beapplied for the amplication or repeating of alternating currents.

Referring particularly to Fig. 1, 5 is an evacuated vessel shown partly in perspective and partly in cross-section, containing a double plate electrode 6, a double grid 7 and a filament 8. .The double plate 6 as shown terminates in a collar 10, which lits snugly around the neck or squash 11 of the vessel, and is held in place by the glass boss 13. The distance between the plates of the electrode 6 is less than the diameter of the collar 10. The plate is therefore securely self-supported without the intermediary of an additional framework or glass standards. ends of the two plates and suitably supported thereby is a nest 16 containing insulation material 17. Through this insulation material passes the supporting wire 18 for the grid so and the supporting wire 19 for the filament.

n the upper The grid and iilament are therefore supported through the intermediary of plate 6. The ilament has its ends attached to the two leading-in

wires

21 and 22, which lead to suitable eXternal terminal connect-ions. The grid 7 has an external circuit connection through lead wire 23. Wire 24, which is preferably welded to the grid at the point 25 aids in maintaining the rigidity of the grid, in order that the desired space-relation between the electrodes will remain fixed. 27 is the lead wire for the plate. Attached to the lower part of the evacuated vessel 5 by the insulation material 32 is a metallicbase or shell 33 carrying the posts 35 (only two shown) to which wires from the various electrodes in the vessel may be attached. This shell, however, is not a part of this invention, but constitutes the subject matter of Patent 1,491,362, of April 22, 1924, to H. E. Shreeve.

In order to keep the two plates 6 from buckling, thereby destroying the desired space relation between the electrodes when the plate becomes heated by current passing between it and the lament 8, it has been found necessary to employ means for stiftening the plate. In the drawing, the means shown consists of horizontal and vertical corrugations o r ridges in that portion of the plate where buckling is Vliable to occur. Fig. 2 shows a modification that may be made in the plate by having part of the corrugations running diagonally.

The insulation piece 17 may be of any desired material such as glass, lavite or the like. In some respects, however, a block of lavite has been found preferable to a glass bead, in that the lavite can be readily machined into the shape desired and holes drilled therethrough. In order to give additional stiffness to the grid and the filament, their supporting wires are preferably flattened over the portion passing through the insulation material 17, therebylaterally extending the wires to frictionally engage the inner wall of the apertures in block 17.

Fig. 3 shows how this invention .may be employed to amplify currents from an incoming line 40 and impress them in amplified form upon the outgoing line 41. Impulses a second electrode and a coming from the line 40 through transformer 42 may be impressed on the grid and the tilament of tube 5, thereby varying the output circuit current flowing between the filament 8 and the anode 6 in accordance with these impulses. The amplified impulses in the output circuit of the tube may be impressed by transformer 13 upon any suitable outgoing line 11.

lt is apparent to one skilled in the art that varied modifications may be made in this invention other than those above described without departing anywise from the spirit of this invention as defined in the appended claims.

lVhat is claimed is:

'1. An electron discharge device comprising a gas tight vessel containing a plurality of spaced electrodes, said device having a neck portion, a support for said electrodes comprising an additional electrode partially enclosing said other electrodes and attached to the necks of said device and a lead in wire for said additional electrode sealed in the neck of said device.

2. An electron discharge device comprising a gas tight vessel having a reentrant neck and having a cathode, a control electrode, and an anode, said anode comprising two plates terminating in a collar resting on said neck.

3. An electron discharge device comprising a gas tight vessel having a reentrant neck, a cathode, two parallel plates forming the anode of said device and terminating in a collar resting on said neck, andan additional electrode having a supporting member attached to said anode by insulating material.

4. An electron discharge device comprising an anode, a cathode and a third electrode, said anode consisting of two corrugated plates, said third electrode and said cathode being situated between said plates.

5. In an electron discharge device, a gas tight vessel having a neck, an anode consisting of two parallel plates supported by a collar resting on the neck of said vessel, and a plurality of additional electrodes situated between said plates.

6. An electron discharge device comprising a gas tight vessel having a neck, an anode, a cathode and a grid,- said anode consisting of two parallel plates terminating at one end in a collar resting on the neck of said vessel, insulation material at the other end of said plates and supported thereby, said grid and lilament being attached to said insulation material by supporting members.

7. A vacuum tube containing a cathode,

plurality of separated metallic members integral with said electrode and supported by a circumferentially complete cylindrical band resting on the neck of said tube.

8. An electron discharge devicecompris- -lng a gas tight vessel having a constricted portion and containing a plurality of electrodes, one of said electrodes terminating in a circumferentially complete cylindrical band surrounding said constricted portion of said vessel, and a lead in wire for said last mentioned electrode sealed in said vessel at a point adjacent the constricted portion thereof.

9. An electron discharge device comprising a gas tight vessel having a tubular neck, a cathode, an electrode comprising two parallel plates terminating in a circumferentially complete cylindrical band resting on said neck, the connection between said band and said plates being circumferentially incomplete at a point adjacent the inwardly projecting end of said stem.

10. An electron discharge device comprising a gas tight vessel having a reentrant tubular portion, an electrode, means contacting with the outer surface of said portion and supporting said electrode, other electrodes .supported by said first electrode and a projection from said tubular portion eX- tcnding into said means.

11. An electron discharge device compris` ing a gas tight vessel, an anode, a cathode and a control electrode, a neck and metallic means contacting with said neck for supporting one of said electrodes, said supported electrode having opposing portions, the distance between the two opposing portions of said last mentioned electrode differing substantially from the effective diameter of said neck.

12. An electron discharge device containing an electrode, a block of insulating material, a metallic band clamping one side of said block against a surface of said electrode and a second electrode supported from said block.

f h l 13. An electron discharge device comprlsing a gas tight vessel containing an electrode, a block of insulating material, a metallic band substantially surrounding the surfaces of said block, which are parallel to the principal axis of said vessel and fastening said block to said electrode, and a cathode supported by said block.

14. An electron discharge device comprisinga gas tight vessel having a neck of glasslike material, a plurality of electrodes, and a metallic standard contacting with the outer surface of said neck and supporting one of said electrodes and an interlocking connection between said neck and said standard for positioning said standard.

15. An electron discharge device comprising a cathode and an anode, said anode having a Substantially plane surface in a deode, said surface being corrugated to prevent its buckling under heat.

16. A vacuum discharge device comprising an anode, a cathode and a control elecnlte space relation with respect to said cathan inte .ment electrode-supported b trode in the form of a grid, said anode having a substantially plav e surface in parallel space relation with respect to said control electrode and in fixed relation with respect to said cathode said surface being corrugated to prevent its ucklin under heat, the space relation of t e electrodes is mamtained constant.

17. An electron dischar e device com risin a cathode and an ano e, said anode aving a substantially plane surface in a definite space relation with respect to said cathode, said surface being corrugated in two directions to prevent its buckllng under heat.

18. An electron discharge device comprising several electrodes, a containing vessel therefor having an inte al inwardly projecting neck, one of sai electrodes having surroun ing said neck, and a lead-in wire for said last mentioned electrode sealed in said vessel at that end of said vessel having said neck.

19. The combination with a neck, of a plurality of electrode elements supported at one end thereby, and a block of insulating material securing said elements together into a rigid unitary structure, a hook carried by said block, means tension on said hook, said hook being adapte to engagxe onev of said electrodel elements..

20. T e combination with a neck; o a {ilament electrode supported by said neck, a -plate supported bysaid neck and bent to extend on opposite sides of said filament, a grid between the filament .and the opposite sides of said plate, and a block of insulating material carried by said plate and ormin the sole support for the ends of the filament opposite tol that supporte neck. v

2`1. The combination with a neck of a fdament electrode supported by said neck, a plate supported -by said neck, a grid positioned between saidplate and lament, and a block of insulating material carried by sai plate and forming the sole support for the by the ends of the grid and lament opposite to that supported 'by the neck.

22. The combination with aneck, of a filament electrode supported by said neck, a plate supported by said tioned betweenv sai a block said plate and forming' the sole support for plate and filament, and

that supporte the neck, and means carwhereby al portion thereorl substantiallyl for maintaining a sprm.

neck, a grid 'posiof insulating material carried byi free ends of the grid and filament, a hook carried by said block to engage said filament, and means for maintaining said hook under tension tending to draw said filament in a taut position. I

24. An evacuated vessel containing an anode, a grid and iilament, said grid being 'intermediate the anode and filament, and a block of insulating material supported by the anode and. serving as the sole support for the -ree ends of the grid and filament.

25. A vacuum tube comprising a press, i

anode, cathode and control electrodes, metallic means onV said press for supporting sai anode and means on said anode forming the sole supportfor the free ends of said other electrodes.

26.` A vacuum tube comprising a cathode, an anode and a grid, an insulating member on .said anode and means for supporting said cathode solely from said insulating member and the neck of the tube.

27. A vacuum tube comprisin Aa cathode, an anode. and a grid, a block o insulating material secured to the anode, and means for'supporting said cathode solely from said insulating block and the neck of the tube, the free end of said grid being also 'secured to said block. i

i 28. A vacuum tube comprising a' grid and a double plate anode, insulation secured to the free ends of the anode plates to space cured to the free end of said insulation to position the grid-, and a member secured to said insulation,`said member forming, with support Yfor the cathode.

29. A vacuum tube comprising a stem, an anode, a cathode and a grid mounted on the stem. the plates. of .said anode, said id being secured to and held in position y said block, and a hook carried by the under face of said a cathode,

block to suspend the upper end of the cathd. ode. i

In testimony whereof, I hereunto subscribe my name this 5th day of February, A. D.

W. F. HENDRY.

the ends of the {i1-1d and filament opposlte to ried by said-block for holding said filament under tension relative thereto.

23. The combination with a neck, of a lasaid neck, A a plate supported yby said nec a grid positioned between said plate and filament, and a. block of insulating material carried by said plate and forming the sole support for the ablock of y the same,\a member segrid and to said the neck of the tube, the solev