US1805626A

US1805626A - Radio apparatus

Info

Publication number: US1805626A
Application number: US426003A
Authority: US
Inventors: James D Jordan
Original assignee: Grigsby Grunow Co
Current assignee: Grigsby Grunow Co
Priority date: 1930-02-05
Filing date: 1930-02-05
Publication date: 1931-05-19
Anticipated expiration: 1948-05-19

Description

Patented May 1 9, 1 931 "PT'LVATYENT FFICE JAMES n. JoRnAN, or-nmvrnunsnitmnojis} sSrenon Toma-testy GRUNOW COMPANY,

orcntioneo, ILLinoIs, A'oonPonArron onim mors RADIOY i Application filedlebruary 5,- 1930;; Serial nd. 426,003.

This invention-relates to devices for 'use in. the manufacture of vacuum tubes, and

particularly to a ig which' will I maintain a r shaped filament and mountin welding position. In order to assemble a vacuum;tube,' care must be taken that the electrodes are properly centered withrespectto each; other.

In the manufacturepftubes, in which a long length of cathode, foldedto'aipredetermined shape, is used, it is necessary that theends of the cathode-be: welded to the supportingit is essentialjl that no; strainsbeq imposed upon the cathode such as would result if the material, were forcibly distorted} into a position diifer'ent from that W i naturally tends to assume; j Anobject of this av simple jig, which will maintain the filament and mount in desired position so that the ends of-cthe fil'ament may be welded to its vsupporting wires. r Another'object's to devise a jigwhichwvill anchor thefilament, so that in the welding process there will be no tendencyfor the filament to slip out of the r Referring to-the" drawings: p v Figure 1 shows one'side ofthe jig with a portion cut away, havingethe filamentand mount in welding position; i i i Figure 2 is aplan view t from theother side;

Figures 7 3 and-4 are open positions. respectively;

member." r

. The jigcomprises a handle portion maintainna.shapedfilament 17.

ean is to; devi e Figure 5is a detailed view ofthe noted that plates 4 have substantially I v the same outline. Betweenthesetwoplates is a spacing member 9*provided withtwo 'V-shaped spaces 6- and 7,jout of which the metal-fhasfbeen jcut. An aperture 8 is also provided, for a purpose to behereafter ex-v plained. i;It will be noted that the body portion'of spacer 9 is narrower than that of platesBI and 4,,With the result that a plurality ofchannels 10' and 11 are formed, into which arbors 120i the mount 13 may be, in serted. If desired, grooves may becut into plates 3 and 4 along channels 10 and '11 to providegadditionalxroom for wires 12, in.

the event that spacing member 9 istoo thin.

-B yvirtue of cut-outs 6 and 7 of spacer 9, I it is clearthat'internal channels'1'5 and 16 are formedwithin the jig and adaptedto In orcler-to anchor the filament welding process, a plurality of apertures 18 are provided inplate3 and disposed at bights 19and 20,0f theloops of, the filament. An opening 20" is cut out in plate 4 and within this opening a spring 21; is fastened to: the m jig. Spring 2l carri'es a plurality of pins 22 that engageapertures 18,.andis adapted-t0 be defiected lby a member 23 projecting lthrough apertures 8 inv the spacer 9 and a registering'aperture 24: in plate 8.

. In orderfto useth's lg, a shaped filament 1 7 isinsertedwhilespring 21 is'defiected out-v wardlyf as shown in Figures. -When the Q -bights l 19 and 1 20, of the, filament loops are atapertures 18, spring-member 21 is released q 4 andc-omestothe position inFigure 3, with side viewszotthefjig, with variousportions cut away in: closedzian d the pins disposedinside'apertures 18. In this 10 and 11, thus bringing support wires and 31 in desired position to the ends of filament 17. In" this position, the filament may be welded :very easily to its supporting wires. Urea th removal ofpins .18 f m th aper during the ,6

ture, the entire assembly may be pulled out from the jig for further operation.

My invention is not to be restricted to the precise details shown. Thus the spacer may have a variety of shapes and in fact may be contracted down to a pin at the junction of cut-out portions 6 and 7 since only the bight anchors are necessary for supporting the filament. The spacer may be omitted if desired and be effectively replaced by suitably shaped opposing surfaces of plates 3 and 4. The jig may be changed to accommodate differently shaped filaments if occasion arises.

Iclaim:

1. A jig for maintaining a shaped filament and mount in welding position consisting of a plurality of complementary plates, means for maintaining said plates in locked relationship, said plates being provided with means for maintaining a filament in a V shape and being provided with other means adapted to receive certain of the supporting arbors in said mount, said plate also having an aperture located where the bight of the filament occurs, and a removable pin in said channelfor engaging said filament bight.

2. A jig adapted to maintain a shaped filament and mount in welding position during the assembling of a vacuum-tube consisting of a Hat base plate provided with an aperture therethrough, a spacing member on the fiat face of said base plate, a fiat plate above said spacing member, means for securing said plates together so that the spacing member is rigidly maintained between said flat plates, said spacing member having a suitable shape so that internal channels accessible from an edge of the jig are formed, the aperture in said base plateoccurring at an end of the filament channel Where the bight of the filament 18 located, a pinin said channel adapted to engage the filament and serve as an anchor and means for displacing said pin from said channel.

3. A vacuum tube assembly jig comprising an apertured flat base plate, an other flat plate over said base plate, a spacing member between said two fiat plates, means for clamping said plates together, said spacing member having a V shaped portion cut-out forming an internal channel to permit a shaped filament to be inserted into the jig,the aperture in said base plate occurring at the bight'of said V and a removable pin in said aperture adapted to engage the bight of a filament.

4. A jig for maintaining a shaped filament and mount in welding position, comprising two flat plates, a spacer member between said plates having a V-shaped notch cut out therefrom and definingan internal channel for a shaped filament, and a movable pin located at the bight of said V.

5. A jig for maintaining a filament and mount in welding position, comprising a flat plate having at least one aperture therethrough, a spacer member above said plate having a V-shaped notch cut out therefrom, the bight of said notch occurring at the aperture of said plate, another plate superimposed on said spacing member, means for clamping said plates and member together, a spring member mounted on said jig and carrying a pin at one end, said pin registering with said aperture, and means for deflecting said spring to remove said pin from said aperture.

6. A jig for maintaining a shaped filament and mount in welding position, comprising two plates separated by a spacing member, said spacing member having a W-shaped notch cut out therefrom, defining internal channels, pins passing through one of said pieces into the two adjacent bights of the W, and means for withdrawing said pins from the plane of said spacing member.

7. A jig for maintaining a shaped filament and mount in welding position, comprising a fiat plate and having a plurality of apertures therethrough, a spacing member having a W-shaped portion cut out therefrom and a plate having a plura ity of apertures, a

spacing member having a W-shaped portion cut out therefrom, the two adjacent bights of the W registering with two of the apertures in said plate, said spacing member having an additional aperture registering with an aperture in said plate, an additional flat plate, means for maintaining said plates and member together, a spring carrying a plurality of pinsmounted on said jig, said ins adapted to lie within the bights of sai W and registering apertures, and means'in said apertures acting on said spring for with drawing said pins-from said bight. c

'9. A jig comprising a pair of flat lates in face to face relationship, said jig ing provided with an internal channel for the reception of a filament, and a plurality of displaceable pins adapted to serve as anchors to maintain the filament in V-shape.

10.'A jig for maintaining a shaped filament and mount in weldin position comprising a pair of flat plates in %ace to face relation, and definin an internal space for the reception of a filament, a plurality of pins adapted to engage the bights of filament loops and resilient means for displacing said pins from said internal space.

11. A jig'for maintaining a shaped filament and mount in Welding position comprising a pair of apertured flat plates in face to face relation; and defining an internal space V for the reception of a filament, a spring strip mounted on said jigand adapted to be deflected and a plurality of pins carried by said strip and adapted to enter said apertures to engage the bights of filament loops.

In testimony whereof he alfixes his signature. e

JAMES D. J ORDAN."