USRE14470E - phelps - Google Patents

Description

'1. A. PHELPS.

DIE sTocK. A

APPLICATION fILED MAR. 4. 19H1. missud May 7, 191s.

4 SHEETS-SHEET l.

iHH/7.2273,

@fia/QWM,

J. A. PHELPS..

DIE STOCK.` APPLICATION FILED MAR. 4. 1918.

75l/HEMA;

@j 16a/a Reissued May 7, 1918.

l. A. PHELPS.

DIE STOCK. APPLlcATmN HLEDMARA. 191s.

Reissued May 7. 1918. 14,470. v 4 sains-sain a.

l. A. PHELPS.

DIE STOCK. APPLICATION man mn.4.1s|s.

Reisued May 7,1918. 14,470.

4 SHEETS-SHEET 4- UNITED STATES `PATENT OFFICE.

if n. 'P nnnrs., or LEVELAND, 011,10x Assiduo?. To BORDEN goMPANY, 01g' WABQEN,

ha a 'a DIEsTocx.

1 btyveen 1 im. u l y the bofgll tei ob'qts in'vi'ew tii's invntinslembdied i i oonstuction, arrangement and combination o'f pits ag hgreinafterudesoribed and claimed a' as s'hoiivn inl die"cinpayi"'filwing, in which similarxrefexjnce chaiatv' indiate simihi Poits., a'ndinwhioligL-i'" Figfure'l i's' font vifw of the die stock. Fig. 2 isa lsanction op th line' 2`2 'of Fig. 1, irtsboig s'hownl in Inoved positio'h 'for urpose of cleaines. Figli, is jview token 1n a diagonal position1 between the top" and side as indicatd'b' i'diiow 3 in Fig. l, garts broken awayI andthe relative 'parts eing shown aS`-'tees`oopd. Figs. 4 and 5 are incomplete crosg sections on the 1in4l5 of Fig. 3 looking'rersgctively toward the front and rear of th" ie Stock. lJefelpfing.pfacica1lytoth drawings, 5 dlg'clatg thvfl y,tubilali workfho: die'pn of body ig lstoik which has Seyeral'yyork eng'gigin 'rhein eif's' Lfmonntedin! thevfrlea'rlend t'hrgo' "lfbeglmernbor's GVg'ue" @pronged 'n to bfgivnnpoummd.,ama-inward. thrust by '7 i0 engagQJQr rleasfe the W'rk Spcidtionofeissiued Lettei's 4llatent. Rigsrud May 7, 191.8.

gether but the plate and sleevehave alongitudinal` slidable movement, andalso the substantially in" [the position` shown in` Fig.

.` spectivelypof` the channel4() and are sea`l` l curedyrigidly -totheouter end ,ioffgthe diey a holder 14y by means of screws 35 These ` rings 24 and 26` receive between them a cam ring or plate 45 having four cams orcam leaves 4700i) the rearl face thereof. These i cams are not only curved away `laterally from the center las hasbeen yheretofore used cross-sectiom;asshown in ligz.` The dies ends,-or, `in `other words, are inclined in 19 havecorrespondingly shaped and inclined ynotches 481into' which the v`said cams 1f`1t'.

t l, pluralityofstudsl175jpreferably four, 1'5 pass'- ,'throughg ,arcuatefslots 50 in the die holderfro-mi they groove 16:` into the recess 15 Iand y have freducedyinner'y endsl 18 which" are d""screwthreaded"andy engagedy in the front end.` ofgthe sleevejllpB ytornalze thestuds 17 rlgld therewlth. Bolts 21 pass through the a plate-27 from .thefrontface thereof in. alinementwithastuds `17 and havethereduced inner endsofthestuds17." y,The body ofthe boltsf21 are smallerpin diameter `than the studs y17 and avvasher 22"` is arranged on each a `bolt 21 and seatson thestud 17.` g These bolts 21also'pass `through the arcuate slotsf39 in "rtaryjmovement `Withrespect `to vthe plate 27 and die holder14;` as allowedby the slots 39, a

thecamringftd le d f By" the construction described', the plate `27 and sleeve 1311are= made to revolve topossibility of a. limited rotaryy movement with `respect to `the ldie holden` The cam ring 45r` hasthekvpossibility of a limited ro# but this 'camring is held snugly against the 'plate 27lby the washers 22. i

i" ment referred to ywill be hereinafter de- The purpose of the limited rotary move;A

scribed.l The longitudinal movement is'to cause the recession of the diesv according to the `taper of `thethread being cut. Thus if the die stock startsworking with the parts 2, the dies -19` will bein their innermost v p70- sitions, then, asthe threading progresses, the sleeve 13` will gradually move fartherk into the groove land this,by reason ofthe pins 17, will shovexthe cam ring longitudinally `,whereby `the inclined ribs 47 come for instance into the `position showninFig..` 3.

t Thiscausesithe dies `to gradually move ra# The pitch of the thread cut isf.,the` same as i that of the thread on ytheholder sleeve 20.`

dially outward to cut ai tapered thread.

While the threadsion the sleeve, 20 must lhave ,the same pitch as the kthreads to be cuton `the pipe, the threadsy on the sleeve 13 mayhave any suitableA pitchv less than the l pitch :of thesleeve by properly inclining fr the i ribs 47; yThe more: nearly the two threads aPPla-Olaeh each tether in lpitch the less will :be

y the relative outwardxadvance ofthe sleeve 13 `rier.` `but diverge outwardly towardltheir rear and the greater must be the taperof the ribs y L17";tocompensate therefor;` The angularity yof the cam `rib must be as many times the` taper of the thread to be cut as the `amount yoflongitudinal movementofthe die carrier is times theamount yof forward travel of the cam-carrying sleeve relative to the die. carpipeof from one to` two inches,which sizes an example,y the dieE ofthe sizeshown' in the drawings is adapted to cut sizes of have a standard number of Athreadsper inch,

namely,\eleven and one-half.` The threads on the sleeve 20, `,then,` are made 11-1/2 `threads per inch, and the thread on the sleeve 13 may be conveniently -made` 12-1/2 threads tothe inch. Accordingly then; when the die stockhas made eleven" and a one-half rotations, the diecarrying sleeve would have traveled one inch'and 4the cam controllingy sleeve would y,move lessk than one inch,

namely, 222/25l inches, so that' the cam con-,l

trolling sleeve would `have movedrelatively forward 2/25 inches while the die carrying sleeve was traveling one inch. Therefore,

the incline of thecam would have to be twelve and one-half times that of the taper to becut on the pipe. p y This concrete example is simpl byway of illustration,` butin any case, t e incline of the cam47 bears the same relation to the taper of the thread as the number of threads c per inch on the cam sleeve bears to the difference between the number of threads jon they twosleeves. This gives us a formulal as follows:

`t;angularity or taperL of thread to be cut; v t

fl 1T=angularity or incline'of the cam f carrying sleeve y h t :number of threads per inch `on the cam-carrying sleeve.

The standard 4taper'of' pipe threads is three-fourths of an `-inch to the foot, onthe diameter, which is equivalent toy slightlyV lessthan one degree @and forty-eight minutes,y the taper on the cambeingtwelve and one-half times, that .s is v twenty-one degrees, d

ifty-twojminutes plus;

The cam ring 4.5 has a radialslot 25 in its lower rend infwhich projects the eccentric n lug 42tof thehead 46 which is screw threaded'yinto the plate 27. This head 4:6y has a handle 28 for turning`- sameyandjas it is turned the eccentric lug 42y workingr in slot 1.05 `n=number of threads per inch on the die- *25 causes the rotation of the cam ring 45 toi-move the dies i19v radially .to or .from the .enter'of 1the device .to engage or disenga e .the work, .the cams 47 ysliding laterally in t e @notches 4810i the dies to move the same. .Jlhis forms convenient means, for -retracting the diesfrom the work when the thread has cut onsthe work. Normally the eccen- 'trio logje-.held tightly to the plate 27, by -of 1 the {screw-threaded` fhea'd firmly .seating against-the plate. .f eye 41 is arranged on the top (Figs. land 2} of-the. dieJ holder .14, anda lip 30 4in. arranged-on the upper endof the plate 1 5 27 in front-of thereye .41 and has .an arcuate Slot'thereim. zA1pinfil'l-slidably occupies the ,eye 41 and hasa shoulder; abutting the rear .faoeotthelip 30 andhas a reduced extenv.sion 2.9l .passing through the arcuateslot in the: lip, being screw threaded -on its outer end. ,The-.pinhasta-longitudinal groove 32 therein 1nwhich afkeydl projects from ,the eye`41 topneventthepinffrom revolving and allowingthe. sliding movement thereof inithe Veyes A pointer 36'v is securedv on fthe extension 29 and is held from movement ,thereon by :a key, 34.A ;A- nut-s37 havingthe handle-38r iii-screwed on the end of the `eir- #Mision 29 -toclampsthe lip t0 tightly between the pointer 36 and the pin 33, thus holding the platefQ'Zl against .rotation :independent of the die holder 14. i

Upon loosening the-nut 37, the plate 27 can bei given -a artial rotation7 carrying the cam' ring wit it, to` adjust the dies 19 for, various sizes of stooliu a-scale of gradu- .ations being arranged on theiplate 271 upon f:.Whichfithe pointer indicates the lsize to which the dies have been set. The nut 40 137 is theny tightened and thedevice-is ready formele.; .This mechanism forms suitable lmeans forsehanging the size of the threads .tobecub f f vf-Inoperation, the body 5 is secured on the Workfthe work being Abrought againstthe zdiee l19.. The diefholderiHis-then rotated in the proper direction by` handles 44:V dis- A 'pesedin eockete-fifprovided =on the holder ,and ithealies are carried-'around the vwork umd"axfenledJ backward; thereon by the lead xthnadB-lenithe .tubularextension x20 as defcrihodat-tbe lates-27, cam ring 45, sleeve-13 v -maladie hol allT being rotated inunison. ,Aa'tha diei-holder Vvvelfliis its way backward, #he sleeve-1:3 has a 'slower rateofclengitudi- 11ml movement, thus causing the-plate 27 anda cam ming 4 5 ,to be' gradually forced lontlidinally away -ffxon'rthefdiieholder. As am' ring: 45imoves longitudinally away 6 fremd theadie, holder, the movement `ot Vthe ihclinedoengaging; faceswofthe cam i ribs .minst-ille walls of, the die. notches results in the dies moving radially foutward, thus .renedingelsowly'nom the center and' cutting 55m fdpmndithveid'onlthelwovkwfw When the thread has been cut on the vwork, the handle 28 is turned to swing the cam ring 45 and the dies are therebyV retracted rom `the work; The movable die holder is reversed to bring it to normal position, and the body 5 having been removed from thework andhandleQS having been turned back, the device is ready for la new operation.

AIt will be seen that the sleeve 13 and tubular'extension 20 telescope into the recess 8 and 9 and the threads are lubricated by the oil contained within the said recesses. They are also in this manner yprotected from chi s cut from the worin t will be seen that by my mechanismthe objects ofthe invention are attained in an efiicient and novel manner, itr being understood that this device is susceptible of alterations in its construction,`l arrangement and combinationI within the scope of the appended claims, without departing from the spirit of the invention.` It is also understood that instead of rotatin Y the `die holderfand dies the work and wor holder may be rotated, which is a mere reversal o operation.

Having thus described my invention, what I claim iszr i 1. In a die stock, a Work holder, a die holder rotatably-mounted thereon to move longitudinally, a die carriedn by the die Iholder, and a memberrotatablej with the die holder and movable at a different rate of longitudinal speed and connected to the die to move same radially. y

2. Infadeviceof the character described, the combinationof a Work holder, la. die holder having a screw threaded enga ement -therewith,adie carried bythe die lho der` a member having a screw kthreaded engagement with they work holder, the pitches of the above mentioned zscrew threadsv being varied, and operative means connectedr'tothe lsaid member and ldie'to move the die radially upon the die'holder being rotated f 3,1In a. device oi f he character described, the combination of' a rotary frameydies carried thereby, a member fhaving an inclined engagement with the dies and rotatablewith theframe but capableof relative longitudinal .movementy and adiil'erential screw- `threaded mechanism for causing'the relative vlongitudinal movement.

4. In a device ofhe character described, the combination Aof a rotary frame, dies cal'- .riedtherebyg a member lhaving an-inelined engagement withy the-dies and rotatable` with therame-but capable fof relative longitudinal movement, and aJ device adapted to be clamped tothe work to be threaded and havn a "te be mfeadedgajmay` ditearr'iaffinvi1-1g`` a `screw' threadedgen agement with saidv lampdl member,"by` `t yreads of the Same ypitch asthosi-` 'to beentfanother member a havin a fsaidf'o amped'member `b n threadsof a dif- `ferent pitch, and aninc ined device engag` ing"` the dies and"` moved relative thereto by reason of suehy didiferential threading;` 2 i 'l 1 L "memberadapiea tot@ tobe threaded`,`,"a. rotary die-carrier having i y"-a `screw threaded yi\engagement with?` said `clamped;member `bythreads corresponding vto:` those to be` cut,` another" member Hhavy ing `afs'crew threaded engagement withsaid clamped member by lthrea` thosetofbecut, andmeans provided within` clined surfaces engaging shoulders` on the a diesk and i, carried by the memberjhaving the f ythread diii'erent romfthe thread yto benut.

j 7.1111- a die stock, the eombinationof' a ai screwl'threaded `engagement with 6'. yIn y ,au die stock clamped to" the work 'sfdiiieringA from sleeve adapted "to` clamped 4stationarily to y v': th'evwork and having internal and external "th-reads,a die carrier having externalfthreads i engagingthe internalthreadsofthe sleeve,

` a member having internal threads engaging the external L threads ofy the i .sleeve,' said exf 'ternal lthreads"of jthey sleeve being of "a: difsu 'ferent `pitch from'theffinfemai ihrieaasgdies carriedby th'ejjdie einfrier,A andmeans hav-A "inga-nlinclined engagement therewith yand `connected (with the/member which engages fthe "ekternal threads of thelstationary Sleeve.

8j; Ina die stock, the "Combination of ay memberl` adapted to be yclamped tothe work,

'l a' rotaryde carrier `screwtjhreadedfto said "member, a reoessioncontroller screw threaded to `said member by athread of different `f pitch" from the: die carrierthread; andr inde- *pendent means for moving` thek'di'esA out-1 -wardlytoffreethem `from the cut piper 9; In a "die -stoc'k,w`awork hol holder rotatsibly;y mounted .thereon togl move ylongitudina'll'y,y a; die, carried" ybythef die holder, anda roam plate rotatable z` with the a v die yholder andata different rate"'of'longL tudinal 'speed and havingy alcamtol'nove the 1 f jdieradially..

Tlf 10.1`Infa de ice*offtheicharacterf "the 'combination of a n work'` "holder,"y

:la `f die holderhavinga screw threadedien'gagemet i therewith, a; die "carried by jf'thej die lholder'" almember havilgffa "screw" threadedengage` ment? with" the `workholder;` the pitches @of a a y the abovel"mentioned"`serew' ythreads ,bein'g` variedyfaridf'a "Icanigplatefl'movable with the saidf memberfand having" fa camfwh'ich ydifverges" awayfifrom*the"lentenoffthe. work l u.holder toward one en A- thereof, fthe jsaidl earn.

@being engaged tortheifsaid def, i ,r ,l r v f l f I *11; In i a device ofthe `character described,

the combination of 'a'.workwholder;'1a-"die b" V fholdervrotatablymountedthereon, a `diegcarzthe-die holderg plate rotatablewitl'ri thefeombination `of a` t fthe dieholder-and havinga` longitudinal 1 "inovementfjtherewith, acamplate carried longitudinally withg'the' said plate 'and "tatabl'e therewith having*` a" cam*` ythereon which "curves laterally away Aand diverges toward one end from the'fcenterofv` the ie holder andmhwhich engagesthey said die,`

means for-moving" the 1 said'fplate4 longitudi- Iflially respect the` ldlel f holder* upon ,the die holderbeing rotated, and means'for` rotating the cam plate j with respect fto the saidplate.

12. 1n a device Qfthechraaer described the" combination lof?r la' workholder,` a die vholder rotatably mounted thereon,` a` die carriedr by the diel holder;` a plate rotatable 'nalmovement therewith, a cam plate ycarried table therewith havinga cam thereon which `curveslaterally awayand dverges toward one endgfi'omy the `center `of the die holder "withthedie holderandfhaving a longitudi` f longitudinally withthe: said `plate and rotaandi which"'engages'thejsaid` die', means for moving they said plate longitudinallyvwith respect'to the dieholderllponl the die holder n being rotated, means forrotating the `cam v plate with respeetfto` thefsaidplategand a vmeans forfadjusting thesaid plate with re- H spect .lo'the die holderizto adjust,y the die therein,` t i y.

i y` "device `ofthe character described oomprising a ywork"holderfa die holderjhav- 'ing a screw threaded engagement with the work hold'erga,diecariied kby the die holder,

`asleeve oone'e'ntx"icfwith` the dieholde'r and having al Ascrew 1 threadedl `engagement with .i theworkholder, the screwthreads 'ofthe' die holder and"` sleevebeingvarined in pitch, af y l `plate mounted to'mov'e lwith the said sleeve, y` y i a `cam" 'rin `"mounted to move with the said late and raving a cam thereon which curves aterally away "and diverges toward one `end from the center of the dieholder andiwhich y `engggagesthesaid die andyineansffor.rotating ""th'e cainfringfwithrespect to the said plate.

fllLA devicefoffthe 'character described `ccgmprising awoikholder, a dieholder having a'sorew` threaded eny agement with the work lioldng'fa*`die` carrie by. the die holder,v

" "a sleeve concentric with vvthefdie holder Sand 'y havingjla zl'screw threadedy engagement with y thefaiworlr` holder, "the screw'1 threads of the l l mounted' to'movefv with the sai nimmer andssleeve'teihg*varied in pian i Mplatem'ountedffto 'move' wlth the saidsleeve t i plate withv respectto thefdie'holA erztowadthe work, a. die carrier having a screw threaded engagement with said sleeve by a thread having a pitch ,corresponding to the thread to be cut, another member having a threaded engagement with said stationary sleeve by a thread of liner pitch than the thread to be cut, dies ca'rried by the carrier, and an inclined device engagin the dies and connected with the member aving the finer thread.

16. In a die stock, the combination of a sleeve adapted t0 be clamped to the work, a die carrier having a screw threaded engagement with said sleeve by a thread having a pitch corresponding to the thread to be cut, a second member having a threaded engagement with said sleeve by a thread of finer pitch than the thread to be cut, dies carried by the carrier, a device on a forward side of the dies having an inclined engagement therewith, and means eXte'ndn movably through the die carrier paralle with the axis thereof and connecting said inclined device with said second member.

17. In a die stock, the combination of a sleeve adapted to be clamped to the work and having internal and external threads, a die carrier engaging the internal threads, a movable sleeve engagin the external threads, dies carried by t e die carrier, a bodily movable annular member in front of the dies and having an annular recess on its rear side, a cam plate in said recess having inclined ribs engaging the dies, and means connecting the movable front member with said movable sleeve.

18. In a device of the character described, the combination of a work holder having concentric annular recesses in the front end thereof, a die holder and a sleeve having a screw threaded engagement with the wall between the .recesses and adapted to telescope into the said recesses, the screw threads of the respective arts bein varied in pitch, dies carrled by t e die hol er, and an operative connection between the said sleeve and dies for moving dies radially upon the die holder and sleeve being rotated.

19. In a device of the character described, the combination of ay work holder havin concentric annular recesses in the front en thereof, a die holder and a sleeve having a screw threaded engagement with the wall between the recess and adapted to telescope into said recesses, the screw threads of the respective arts being varied in pitch, and the die holder and sleeve having a snu sliding engagement with the unthreade Walls of said work holder bounding said recesses, dies carried by the die holder, and an operative connection between the said sleeve and dies for moving the dies radially upon the die holder and sleeve being rotated there being means for admitting oil to said annular recesses.

In testimony whereof, I vhereunto aiiix my slgnature.

JAMES A. PHELPS.

Witnesses:

PETER REIMUND, JUSTIN W. MAGKLIN.

Copies of this patent may be obtained for iive cents each, by addressing the Commissioner ot Patenti,

Washington, D. C.

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