US1565152A - Vacuum insulator and its assembly - Google Patents

Description

Dec. sJ 1925. ,565,`152 W. G. HOUSKEEPER VACUUM INSULATOR AND ITS ASSEMBLY /n venbf.- /4//7//0/77 How/keeper;

huestes Dec. s, 1925.

" f A'certain' new jand' useful Improvements in hVac'uum- Insulators and Their Assembly, of

e 'which thefollowing is a full, clear, concise,

and exact description.

'frequency "circuits v'an'd pertains ofthe grid and anode electrodes.' .y

In' employing a vacuum tube incertain installations, particularly in high voltage,

high frequencycircuits, is necessary to provide special means for preventing corona i effects along the grid and anode lead wires cathode.

`and discharges from said lead wires to the base' of the tube or to the lead -wires of the Heretofore,' attempts have been made to prevent these effects by surrounding the lead wires with bodies of insulating material extending through the disc forming a portion of the base of the tube. However,

" -fin operation."

i yprove generally lupon insulating devices, .this

. the dielectric losses'due to the high voltage,

high yfrequency currentsproduced suiiicient heatin of the bodies of insulating material to quic ily destroytheir insulating property f and thus render the tube inoperative. l

Itis an object of this invention to provide' an insulator for'i'ise in' the base of' a high" power'vacuum-tube for 'conducting the Grid and anode lead wires therethrougliwhich will eifectively prevent discharges from 'and corona-.effects along said lead wires'- and in voltage, high frequency circitswhiclfis `simple 1n constriuition and To accomplish these objects isu'lator. l'York, State of `New York, have invented This invention relates to 'device-'s'forI insulating the conductors ofhigh voltage, high more especially to "aninsulating device adapted 'for use in'conducting through theb'ase ofl a highl power vacuum tube the llead wires' insana PATENT @FF-ECE.

i liiinniaiu e. IiUsKE'EPEE, 0E, NEW Yom; N. Y., AssIGNoE 'ro-WESTERN ELECTRIC QONPANTY, INCORPORATED, or -NEW YORK, N. Y., A coEroEA'rroN or NEW Yeux.'

" f 'vAoUUM'INsULA'roELAND :Ts ASSEN-.sniff v Application mea November 2e, f is2o. serial No. 426,454.

invention comprises an evacuated closed vessel through whichi'is passed a conductor, the evacuated space poviding'the necessary in- The vessel may be mounted wherever it is desired to utilize its insulating property and be' included in an electric cir- -cuit by connecting the ends ot the conductor with the conductors of the circuit, For, ex-

ample, the vessel 'may be mounted in the base ofa vacuum tube, with one end connected to the lead wire of an electrode of the tube and the other'to a contact member.

Other objects and features oi this invention will be apparent from the following specification and appended claims.

This invention will be better understood by'referenc'e to the following specification and accompanying-drawing wherein Figure 1 discloses a vacuum tube equipped with insulators made in accordance with the .invention and Figure 2 discloses the insulator Iadapted for general use,

In Figure 1 the vacuum tube -comprises the Abulb-1) having a cylindrical neck 11 and a re-entrant stem l2. Encircliug the stem 12 is a metullic collar 13 equipped with the supports 14 extendinginto the interior of the bulb.V Carried by the supports 14 is the cylindrical anode l5 from which are-supported the blocks 16' of insulating material between which are mounted the grid 17 and cathode 18 according to the manner dicclosed in applicants U. S. Patent No. 1,536,- 855 issued May 5, 1925.

' Extending through thesteni 12 to the end of the neck 11 aref'tlie tubular members v1 9 and 20, the inner ends of which are in communication with the interior of the' bulb.

.Arranged in said tubular 'members are the. which there will be-no injurious heating of.; -the dielectric. l A further object-,ofthe linvention'is'to pro. vide an insulator for general"'use,'in highfi grid-and anodelead wires 21 and 22 to Qwhich are sealed the outerends of the said .of the bulb and cemented thereto is a metal- .flic shell-23 in the lower end of which is .carriedthe disc 24 of insulating material- 'havinga groove 24 in its periphery.` In' the arrangedfthe insulators 25' which atonement-f discare provided two apertures wherein are.

at its midportion and which tapers conical-A ly toward its ends. A flange 26is provided on the vessel wherebyfit may be located in its aperture relative to the disc- A conduetor 27 extends through `this' vessel and is sealed in the ends thereof, one end thereo'f being adapted 4to be joined to the lead wire of the grid or anode. 0n the exposed end of the vessel is provided a contact thimble 28 which is electrically connected with the conductor 27.' The vessel 25 is evacuated through tip 29 which is sealed olf in a well-known manner. The disc 24 is also provided with contact members 30 which preferably have apertures therethrou lh to receive the lead wires 3l of the -v catho e 18, said lead wires being enclosed in are'rst associated with the dise 24. The

25 dise is then placed -in the shell 23 adjacent'. the edge of the end'thereof which is to be cemented to the neck of the bulb with the uncapped ends ofthe vessels 25 projecting beyond said edge. `.,lllhe shell is then so 30. placedrelative to thd ulb as to bring the disc into the approximate position which -it will occupy after complete assembly, the lead wires 31 arc threaded through the contact members 80 and the exposed ends of 35 the conductors 2'? are joined to theends of vthe lead wires- 21 and .22ct the anode and grid electrodes. Then thc shell 23 is slipped along the disc 2() and onto the neck 1l to which it is cemented, after which the lower `1U end of the shell is spun into the groove A2li in the.peri1 hery of the disc 24. The lead wires 3l of the cathode 18 are then soldered to the contact members 30, after which they are flushed olf even with the ends `of the contact members. This method of assembly assures that those portions of the lead wires of thc grid and anode electrodes between the ends of the tubular niembers 19 and 20 and the inner ends of the .in-

sulators 25 will be apln'oxinn'xtely straight.

In Figure 2 wherein the insulator is disclosed for general use designates a sup' port or member from which a conductor 1s 'to be insulated, for example, a partition or the like. The vessel is of the same configuration as 25 and is provided with a 'similar flange 34. The conductor 35 passes through the vessel and is sealed into the outer ends thereof. O'n either end ofthe G0 vessel are provided caps 36 which are perv manently joined to vthe vessel and which are electrically connected with the conductor 35. These caps 'are provided with means for attaching electric wires thereto, preferably by l having'an aperture therein through which the wire may be passed and held in place by the set screw 37..

. These insulators, when lused in the bases of vacuum tubes, allow the .tubes to be operated in high voltage, high frequency cir- 74'- cuits. The evacuated condition of the vessel prevents the high voltage. high frequency circuitsl from causing a heating of the di#- Aelectric and thus preserves the insulating property thereof.

It is to be understood that. changes may be made in the structural featuresof this device without in any way departing from thespirit of theinvention as set forth in the appended claims. Y S0 What is claimed isz,

l. ln an electric discharge device,l a base,

a nnitar)v evacuated vessel of insulating material carried by said base, said vessel tapering eonically'toward the ends thereof, a S5 leading-in. wire of an electrode of the tube passingthrongh said vessel, a cap mounted onone of said ends, and an electrical .connection between said leading in wire and said eap.- 90

2. In a base for electric discharge devices, a disc,l a unitary evacuated vessel. of insulating material mounted .in said d isc, an electrical conductor passing through said vessel, said conductor comprising a portion of theleading-in wire of an electrode of a vacuum. tube, a cap mounted on said vessel, and an electrical connection between said. conductor and said cap.l

3. In a base for electric discharge devices, a disc having an aperture therein, a unitary evacuated vessel having a cylindrical portion and con-ical ends arranged with its cylindrical portion in said'apertnre, an electrical conductor passingthrough said vessel and sealed into the. ends of the conical portions, said conductor comprising a portion of the leading-in wire`of an electrode of a vacuum tube, a cap mounted on one end of said vessel, and an electrical connection between said c'ap and said conductor.

4t.. In a base for electric discharge devices,

a disc having an aperture therein, a unitary evacuated vessel having a. cylindrical lluidportion and conical ends arranged with its cylindrical portion in said aperture, a flange on said cylindrical portion to engage said disc to position said vessel .relative to said dise, an electrical conductor passing throu h said vessel-and sealed into the ends of Sie corneal portions, said conductor comprisi g a portion ofthe leading-in wire for an el c-. trede of a vacuum tube, a cap mounted im one endv of said vessel, and an electrical edn- 12 nection between said cap and said conductor.

5. A device' of the character described comprising. a unitary -evacuated vessel of insulating material, an electrical conduc r passing through and sealed 4in a wall of s id 130.

.vcsSeL a cap carried by said vessel, said cap being electrically connected-With said conductor and formi-ng a terminal.

G. A device of the character described, comprising a unitary evacuated vessel of in.- sulating' material, said -vessel ,having a substantially cylindrical member havingconi- Vcial ends, a flange around the midportion of 1 L said vessel, a metallic cap on one of said' conical ends and a conductor passing through said vessel, s, id conductor being electrically connected to said cap.

In witness whereof, 1 hereunto subscribe my naine this 18th day of November A. D.,

WILLIAM G. HOUSKEEPER.

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