US2583418A - Horological balance wheel holding and rotating device - Google Patents

Description

Jan. 22, 1952 v. L. EMANUEL HOROLOGICAL BALANCE WHEEL HOLDING AND ROTATING DEVICE Filed June '14, 1948 19 3 v Vacforli'm INVENTOR.

Patented Jan. 22, 1952 lsrATE PATENT. F

7 HOROLOGICAL BALANCE WHEEL VHbLDING I AND1ROTATING DEVICE v l Yictor L. Emanuel, Colorado Springs, Colo. l

Application J une'l l, 1948, Serial No. 32,783

" 1 Claim. (01. 51-23s) My invention relates to a device for properly able distance from its outer end, with a socket holding androtating a horological balance-wheel or opening to receive the end of the thumb-screw during its pivot polishing operation and pertains l4 arranged in the tapped opening in the upper more particularly to means whereby a true cen: end of the post I0, as shown in Figure 3, whereby tering or aligning of the pivot holding elements 5 the member 13 is securely held in place against may be more quickly. anda'ccurately obtained longitudinal and rotative movement. and such centering .maintained during the The member l3 at its inner end ispreierably mounting of the balance-wheel in place. provided with a flange l5 and with a rotatable The improved device contemplates a hollow grooved pulley l6 which, at one side, is prop ey carrying member on which the pulley is 10 vided with an elongated spacing hub l6 adapted non-'shiftably, and rotatably mounted and said to take against the adjacent side of the post to hollow member adapted to receive a longitudimaintain the properspaced relation of the pulley nally adjustableipivot lreceiving rod or member relative to the post l0. r with which apivotholding element. or adjust- The pulley I6 is cross-drilled to slidably reable plate is aligned. The invention also conceive the balance-wheel controlling pin H, which templatesta centering pin or rod longitudinally latter is held in its adjusted positions by a suitslidable' throughflthe hollow pulley carrying able friction springl8 arranged intermediate member and adapted to engage the pivot rethe flanged or shouldered inner end of the memceiving hole in the adjustable pivot-plate durber l3 and the inner adjacent side of the pulley ing installation and adjustment of the remov- 16. The free end of the spring I8 is adapted to able pivot-plate. frictionally engageqpin H to maintain the latter My improved device is ofsuch construction in its longitudinally adjusted position. I that it may be readily attached or mounted on The end of the squared portion of post Ii) is a watchmakers lathe and power for rotating the also cross-drilled to receive the reduced outer end balance wheel rotating pulley is received from of the pintle I9; the reduced end being snugly the lathe driving shaftor pulley. v driven into post Ill so as to rigidly hold the pintle The objects and advantages of my invention against movement. The inner end of the pintle will be readily comprehended from the follow- It is shouldered and provided with a further reing detailed description of the accompanying duoed externally "threaded end l9, adapted to drawing wherein: receive the internally threaded thimble or sleeve Figure l is a perspective view of a portion of 20, whereby the balance-wheel pivot holding plate a watchmakers lathe with my invention applied 2| is clamped against the shoulder formed at the thereto. reduced inner end of pintle Ill. The lower end of Figure 2 is a side elevation of my improved p vot ho d plate is preferably Vertically device, on a larger scale, removed from the lathe. slotted to fit onto the reduced end of the pintle "Figure 3 is a longitudinal sectional view, with to permit vertical and lateral adjustment of plate portions in elevation, of the device as shown in 2|; and the upper end of the plateis preferably Figure 2, with the pivot holding rod replaced by provided with a pivot receiving small hole as a centering pin. at Zi l V Figure 4 is an and elevation as viewed from 40 The member I3 is adapted to receive and supthe right in Figure 2. port a longitudinally adjustable balance wheel Figure 5 is a detail view, on a somewhat larger ivot holding rod or member 22 whichis closely sca e, partly i s ctio f the piv t holding e d or more or less frictionally fitted in the member of e p t ho d p t e o r own in Fig- Band, hem in its adjusted position by the thumb We i l screw L4 whi'ch'extends through the-hole in the In the particular exemplification, the device b a '5 hew-in Fi ure 3. The member involves a supporting upright post l0, preferably 22; at it t f-e dds shown provided with a of square cross-section at itsupper end and a finger grasping portion oifiknob 22 while the cylin c lower Q y be integral end faceof the member latits longitudinal axis with 1 3 a force fit in the lower end of is longitudinally drilled as at 23 (see Figure 5): square section) adapted to fit into the socketed toreceive apivotof'a balance-wheel. The mem base ll, of the T-rest attachment of a watchher 22, at the inner'end and at the pivot remakers'lathe, the post being firmly clamped in ceiving hole 23, preferably ispross-drilled' as at vplace against rotation as for example by the 23%,communicatingwith the'baseof hole 23 (thus hand screw member l2. obviatingthe necessity oi greaterlongitudinal The upper square portion of the post is crossdr llin o ho 2 th re y a g mo a drilled to receive a tubular or elongated non-ro b nce w g P lQ 1? 5 ngt f." l tating hollow member l3 whose longitudinal axis In order to enable aquick and accurate centeris arranged at right angles to the vertical axis ing or aligning of the pivot receiving hole 2| in of the post [0 and preferably provided, at a suitpivot plate 2| with the pivot receiving hole 23 of the end of the rod 22an operation which can be more quickly and accurately performed. After .therpivotplate hole 2le-has thus been centered with the pivot receiving holei23 in: rod 22 and plate 2| 'securely'fastened'in position, centering ;pin 24 is withdrawn and pivot holding pin 22 the sleeve and after its pointed end 24 =.has=en tered the hole in the pivot plate}! thepin may be held against movement by the thumb-screw H, with the result that the pivot-platen I Wi11Ib secured against mdvementt by the "thumbsscrew H. As isapparentfithe pivotreceiving holeslill the-:end of member 2 2 -:and in :the pivot s plate 12 i will be in -true alignment.

l he pulley H loosely'mounted on the-elongated member I3, is intended tobe driven by theibelt 25 which extends about :pulle'y member 2 5 :provided with-two grooves of: different circumferences wherebythe pulley i l fi may -beHdriveniatl different speeds; with-belt225:ar1 anged inssmallgroove 228 pulley It will be'driven at a low: speed=whichzis especially=desirable imbalance-wheekpivotstraightening operations.

*The -pulley member 28 at one gsideihas 1a (trunnion 26 adapted to:fitiintoa-chucksecured-ztoithe end of the usual driving shaft of the lathe.

After the *balance-wheel "has been :properly positioned bet-ween the :end of member ;2-2 and pivot holdingplat ei I, the :fork or-.:controlling'-pin H islongitudi-nally:adjusted in pulley 16 so that the end of the :pin 2t1 will engage rthevbalancewheel and 'cause the: latter to rotate during rotation of 'pulley .16; pin .1?! Ybeing =1ongitudinally adjustable adapts "it to different .:sizes of balancew-heels. As-thevpulley t6 isi held.:against-:movemen-t longitudinally of *the imember 113 by :the flange :l5 and etheehub=portion "16 the pulley :16 is maintained in transverse alignment with the chucked :pulley'zfi secured to the drive :shaft of the lathe; adjustments 'for tdifierentsized :balance-'wheels being made ;by rsliding -or slightly turning the frictionally held fork or pin IT.

in balance'wheel holders as rheretofore made, the watchmaker ma kes --ad;iuStment :of the pivot plate aby sighting tlierpositigmof the -plate-relative to the ;end of-:the pivot ;receiv ing member, shifting the vertical position of the pivot plate until the balance-wheel :apnearsto 'bGiITVCIPtiCaI position and then tightens the plate clamping setscrew,whoseturningmovement-frequently causes the pivot plate tyslightlyshift laterally. With my improved device ;provided with the vrigidly held rmember, the ;c,ent ering pin ;24 -is initially insertedthrough the-member and the \pivot plate is shifted to position where ,the top or point of the centering pin engages the .hole in the .pivot p lh centerin pin-is kept inthis-pos o durin screwing 41p of the pivot. plate clamping thumb-screw thereby holding the pivot plate against movement and ensuring true alignment between the pivot plate hole and the hole .23 in substituted and the balance wheel to be operated on is'then'put in-place withone pivot inserted in hole 2P and the other pivot inserted in hole 23rof rod 22, .which latter is then held against accidental outward movement by screwing down thumb-screw l l. Fork or pin H is then moved outwardly until it engages the spokes of the balance wheel, causing the latter to rotate with pulley I6. The balance wheel then is in position for the watchmaker to manuallyperform-"the usual pivot straightening and/or-poli'shing *qperationswhich generally are performed by means of suitable pivotstraightenin tweezers while'ithe polishing is :accomplished by theuse of small jasper-slips :or "sapphire slips "held "against ':the lower surface of :the pivots during :balance wheel rotation. After'theoperation'on'the pivotizheld by'pivot-plate 121 :has been completed-webmance-ewheel is reversed becausethe pivot seated in the aperture ofpin =22is notaccessiblefor'these operations. g

My improved device :has "been described .in terms of description anfdnot' aspt'erms of limitation; .certain details ofmodification may':be possible without,;however, 'departing'rrom thefspirit of my invention as'defined in theJappended claim,

What I claim is: V

In a horolqgical balance 7 wheel .holding and rotating device, the combination of a vertically disposed sup ortingpost with a horizontallyextending. pintleerigidlvmounted ,on wtheilower part of the ,post; .an npstandingibalance wheelgiiivot receivin .eperturedmlate.adiustablvmountedat its lower end on said pintleande-arranged transversely thereof; a horizontally .dispnsed hollow member ,in the ilpner endiof .said post, .arranged parallel with ,said .pintleeand having an ,annular flange at its inner end; a pulley, with tin-1011 gated ;hub,-for maintaining ,the,pulley.against, said annular flan e, .rotatably.mountedion-saidJnember and provided with a longitudinally adjustable balance wheelleontrolline pin; a pivot .,ho1dine rod slidably :and removahly [mounted -in .said hollowrmember and providedat-itsinnenend and at .its longitudinal axis vwith ;a balance-wheel pivotereceiving aperture; and means ;for :holding said rod in its adjusted position.

vrcron ,L. EMANUEL.

REFERENCES aCLLED The following :references {are .ro'f record in the file of this patent:

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