US1448577A - Metal-spinning machine - Google Patents

Description

Mar. 13, 1923. 1,448,577

J. S. STULL METAL SPINNING MACHINE Filed Mar. 19, 1920 3 sheets-sheet 1 Mar. 13, 1923.

J. S. STULL METAL SPINNING MACHINE Mar.13,1923. 1,448,577

J. S. STULL.

METAL SPINNING MACHINE FiledV Mar. 19, 1920 5 sheets-sheet 3 f/,m v

/n Ven/Oft John 5km/ey w/ by Affy Patented Maru 13, 1923.

UNITED STATES PATENT OFFICE.

JOHN STANLEY STULL, 0F CHICAGO, ILLINOIS. ASSIGNOR TO WEST'EBNv ELECTRIC COMPANY, INCORPORATED, 0F NEW YORK, N. Y., A CORPORATION 0F YORK.

METAL-SPINNING MACHINE.

Application filed March 19, 1920. Serial No. 367,203.

Tooll `'who-m 'it may Conce rn Be it known that l, .loHN ri'riNLnr 'r'nLL. a citizen olE the United itatee. residir.;` in Chicago, in the county ot Cook. State oi lllinois, have invented certain new and use iul improvements in hletal-t-lpinniug Machines. ot' which the followinga is a toll.. clear, concise, and exact deserilition This invention relates to special tools and machinery and more particularly to devices tor spinning metal tubes and the like and it has tor its object to provide a simple` et'- icient and conveniently operable machine for spinning the shells or sleeves ol' the bases ot electrical vacuum bulbs ot' any kind into the cap piel-es, though the invention is adapted t'or wide use in this general eapacity or other similar work.

This invention. in `general. eoiuprises the provision of a pluralityY of tools which are carried on a rotary head and are adapted to revolve about the axis thereot'. Resilient means are provided which tend to draw the toolsY toward their common axis upon being released so as to impress the work. naanually operable cam mechanism provided and adapted normally to hold the tools in a retracted position. This mechanism is adapted to be operated without stoppingr the rotary head. A yielding pad is positioned approximately eoiurident with the axis ol the tools and 'functions to hold the parts of the tube base in proper position while the spinningr operation is being per- Vformed. A supportV is provided jfor the parts of the tube, which is so constructed as to permit the parts to be readily presented to the spinning deviee and easily removed trom the support after the spinning1V operas tion.

The invention further resides in certain other improvements and combinations ot parts as Will be hereinafter more fully de scribed in the specification and claims.

In the drawings: llwure l is a vertical, central` loi'ln'itndinal section ot' a spinning machine constructed in accordance with and illustrating one embodiment ot my invention. with portions broken away and other portions partly in side elevation; Figure is an elevation of the movable support for the parts ot' the tube during the spinning operation; Figure 3 is a fragmentary detail'seetion in the same plane as liligure l but showing certain o i' the parts in different positions; Figure 4 is a transverse section on the line 2)#-2 ot Figure l .j Figure is a perspective View of the tool hesnhpartly broken away; Figure G is a perspeetive view ofY one ot the cams associated with the tool carriages: Figure T is a perspective vien' ot one of theV tool carriages; Fig-ure 8 is au enlarged detail section through one ot' the tools; Figure 9 is a perspective view olf the finished workpiece; and Figure 1l) is au elevation of the tube support as viewed from the left in Figure Q. Similar reference numerals throughout the several views indicate the same parts.

To tiret explain the nature of the work aeeoinplislnvl in the present embodiment of the invention. ret'erenre is made to Figure 9 and to the fragment ol' the work-piece shown at the right ot' Figure l, wherein A represents a metal sleeve or shell on the hase ot' a vaeuum tube or bulb B. ln the end ot the shell is a cap Il of mirarta which carries the projecting terminal plugs D and a cap oiI balelite or similar insulating nuiterial. rthis rap has a peripheral V-shapeol groove Pl. and the function ot' the present machine is to spin a rib l on the inside of the shell to lori; in the `groove E and hold the cap in plaee. The rap B rests against the shoulder ot the shell and the cap C rests against the rap Pi during spinning and is held there by means of the pad Vl5 bearing against it.

Referringuoiv to the other figures. l indicates a standard on the main traine of the machine. which standard rarries the main bearing 2. and in this bearing* turns the tnbula'r hul 3 of a. driving pulley 4 carryinglr a belt 5. (,lhreaded at on the forward end of the hub 25 to turn therewith, is the hub T ot an annular tool head Fl. A rod 9 extends axially through the head H. The tortvard portion ot rod has a bearing at .t0 in the hub 7 and its rear end slides in a bearing 1l in al bracket arm 12 .secured to the standard t. A stop pin 13 threaded into the hearingr and cooperatingv 'with a `short groove .4 in the rod 9 prevents its rotation during its longitudinal movement. t its forward end. the rod 9 carries a head in the torni ot a pad '15 with a surroundingr Hanne 16. The rod 9 and pad l5 are normally held in a projected position. beyond the head 8 and the tools carried thereby, by a spring 1T coiled about the rear end o't rod 9 betitveen a stop collar itl thereon and the bracket l2.

lire tool head (Figure is provided with alined radial guides if) in which a lpair ol' tool earriages :ZU is adapted radialliv io slide. (lne ot the carriages is shown in etai'i in Figure i'. The inner end ol' each carria'r is hoi-ed at .i to rre-'fire a hollow stud :3i (Vigni-e n) on wiieh turns a dise tool Eil. 'the tool Lj is held in plaise by a threaded rap :il haring a eentrai nii opening :f elosed by a ball valve :iti that is held in piace h5 a spring 2T. The oil is eonnnun'r rated to the hearing' ot' the tool l' on the stud 1&1.' through an opening in' in the latter. Vihe rari'iages 2l) and the tools ti'iereon tend normali)Y to more inwardly toward the axis of the head under the influence ol' springs :22) ronnerting the rarriages togetheny the ends, ot eaeh spring neing engaged orer pins Ilo projeeting lateralljfv lroiu the carriages through slots 31 in. the guides l?. The

springs 2H lie in recesses H2 in the head parallelingr the guides 19.

1For the purpose ot permitting the tools and their rarriages to more inwardly, the oxuer ends ot' the latter are hifureatetl t0 provide relies 152;", and extending between the nner ends of the arias ot these )pokes are rollers 334. (Tenis 35 engage beneath the rollers and extend through the Volies as .shown in Figures i and el. These. earns are ot' the Vtorni shown in detail in Figure 5 and are rigidly serured hy siren-s 36 to the `llaniie :51' oi' a sleeve fifi slidable longitudinall)f on the hull i ol' the tool head H and rotating with it. The sleeve 38 is shit'tetl lian-li' and forth het irren the head and a pair oi' threaded stop eollars Si! on the end ol` die huh i' hy a shitting derive carried by a standard 40 rising' at one sidi. of the standard i and lorwardl)` ot it A lever il havinel a hearing on the upper end ot the standard l0. Whirl] extends through the hul if ot' the lever. is provided at one end with an @printing handle l and at the other with a yoke 4l (Figure il einliracing the sleere 25S and havin;v radial pins Al5 occupying hearings 4G in a ring' gli that is not rotatable hut occupies an annular groove 4S in the sleeve 25S. By reciprocating the lever l. the sleeve CN carrying; the rains may be shifted hai-k and forth without stopping the head S.

The rains i5 normally oeeupv the forward position shown in Figure l in Whieh the earriage rollers occupy depressions 49 l'ornied al ilu high end o l' the mini surface. rlliis holds the carriages in their outer positions and the tools 25% retracted.

ln Figures 2 and v10 is shown device for supporting' the work pirf'e in a position een trai with resnert to the axis of the spinning' dern-e and for noovingir the work piere Jtor- \\ard into a position in whieh it is adapted to he operated upon h v the spinning head. This deviee comprises a fixture which is srenred to a sliding tail stoel; 56 of the nun-,linie The tail steek 5G has the usual orari-lied portion Si whirh is advanced or `elrarted or the rotation ot" a hand Wheel 5S an interior threaded bore 59. The ai portion if( has a stop 60 fixed to its tornarti movement. .Lili comprises a rectangular he open mid-portion oi nhieh has a pla tor supporting the hallo B a' in rlln front portion ot' the l oniprises a split rin@ olb an inner diameter rorresponding to the outer dianeler it the, nhe shell The shell A of the tulie rests on the lower halt G52 of the split ring'Y he upper hall' (Sil ot' the split ring pirotrat (SiV and is moved in place tr enilirase ilse sla-ll .i eurved lever 65 piroted at HG is inoved into position so that a lat-hing notch UT thereon presses against the upper surface ol' the part Elli to hold it in ion embracinga the shell A. To engage swinnine headl the lixture is moved torirard until the work piece presses against lhly pad lf nntii it is in the plane ot the tools fit this instant the stop (it) prerentsl'nrtller forward maniement ot the fixture. The lerrr ll is ilien operated to sleiit the sleeie im rt-aiwrzirdf` :ind allow thtI rollers i4 to ride down the surares oiI the rains 35. This rarries the im il inwardl \Y or toward .arh other and into engagement with the Workpieee as shown in Vigni-e H with the requisite pressure to torn: the ril; i". `dlhen so med= the hand lerer ell is moved in the opposite dirertinn advaiv-inir the rams through the rolies Tiri :ind cansino' the rollers fiel to ride thereon so that the tools 23 are retrarrd and the irorlvpiet'e il. is tree to he Witlnlrawn.

The workingr parts :ire pret'eralil;Y enclosed within a snitalile housing 50 provided with oiline apertures 5l and and with an axial opening 5? i'or he insertion of the workpieee.

'What is elairnml is:

1. ln :i maehine for spinning tubular metal nieniliers into supporting caps. a Totary head. a spinning tool carried thereon, said tool being adapted to he adjusted Without stopping said head. a holding;` mechanism tor advancing a tubular member and can into operative position to said spinning' tool. and yielding? means eoin'ierating with said holding means for maintaining the. eap in the desired position during; spinning'.

Q. ln a nnn-hine tor spinning tubular inetal lnenihers into snpportinf,r Caps, a rotary head. a radialliv adjustable spinnine'tool rarried therrw'm. yieidingj in lans `l'or inovingq .said tool into rcorlY engaging position during4 the rotation ot said head. ,means for retractine' said tool against the :ii-tion ol said yielding` means and duringr the rotation ot said h nl` a holdingi meehanism for advancing a` i lniri g' tubular member and cap into operative position to said spinning tool, and means co operating With said holding means for maintaining the cap in the desired position during spinning.

3. In a machine for spinning tubular metal members into supporting caps, a radially adjustable spinning tool, a longitudinally movable holding and centering device for a tubular member and cap and 'for advancing the same into operative position to said spinning tool, and a spring operated pad movable relative to said head and passing therethrough to be engaged by the cap as it and tubular member are advanced into operative position to said spinning tool whereby energy is stored in said spring operated pad to maintain the cap and tubular member in operative relation during the spinning.

4. ln a machine of the character described.` the combination with a rotary head and a pad arranged axially thereof and embodying a spindle reciprocally mounted in said head and a spring causing it to normally protrude yieldingly beyond the head, of a radially movable spinning tool on the latter adapted to cooperate with a work-piece held against the pad.

ln a machine of the character described, the combination with a rotary head having a hub and provided with a radial guide, and a pad arranged axially thereof, of a carriage slidably mounted in the guide` a spinning tool on the carriage, a spring tending to move the carriage inwardly to bring the tool into cooperation with a Worl -piece in pad device and a sleeve slidable axially on the hub of the head and having a cam cooperating with the carriage to retract the tool.

G. In a machine of the character described. a rotary head having a hub and provided with a radial guide, a carriage movable in the guide, a spinning tool on said carriage, a spring tending to move said carriage inwardly of the head, arms projecting from the outer end of the carriage, a roller extending between and carried by said arms and a sleeve slidably axial on said hub, said sleeve having a cam cooperating with said roller to retract said tool.

T. In a machine of the character described, a rotary head having a radially arranged groove in the face thereof, a carriage reciprocally mounted in said groove, a spinning tool on said carriage, a Spring tending to move said carriage inwardly, arms extending from the outer end of said carriage, a roller interposed between and carried by said arms, and a reciprocating cam member projecting between said arms, said cam member being adapted to retract the carriage against the action of the spring.

8. ln a machine of the character described, a rotary head having a diametrically arranged groove in the face thereof, carriages reciprocally mounted in said groove, a spinning tool mounted on each carriage, a yoke at the outer end of each carriage, a roller carried by each yoke. a cam member projecting through each yoke and contacting with said roller, said cam member being adapted to more said carriage outwardly, and springs connecting .said carriages to normally draw them toward each other.

ln Witness whereof, I hereunto subscribe my name this lz'ith day of March, A. D., 1920.

JOHN STANLEY STULL.

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