US2271945A - Watchmaker's tool - Google Patents

Description

Feb. 3, 1942 J. H. MEINHARDT A.2,271,945

WATCHMAKER S TOOL Filed April l, 1940 Snventor ffm Gttomeg Patented Feb. 3, 1942 UNITED Y STATES .'WATCnivrAKEn?sroot.` y; .l Jgsephn. Meinimat, :rangs-Clit?, Mo.. Y y.. l' Application APil 1Q 1940, seriaiNo. 327,202..

'9 claims. relies-sary p My invention relates'to watch makers v.tools andthe present invention is an improvement over U. S. Patent 2,098,103 granted November 2, .1937, in which I am the owner of an undivided three-fourths interest. `One new feature of the present invention resides in means for removing and replacing theY hour andminute hands of av watch, in addition to the means for removing and rep-lacing'the cannon pinion.

Another new feature resides in means for preventing the tool from scratching or otherwise damaging the highly polished face of the watch dial during the operation of removing or replacing the hands of the watch. f Other features will hereinafter appear andin order that the invention may be fully understood, reference willnow be had to the accompanying drawing in which: Fig. 1 is a side elevation of the tool. Fig. 2 is a front elevation ofthetool. Fig. 3 is an enlarged broken vertical section of the tool in initial positionpreparatory to gripping'the hub of the hour hand of a Watch.

. Figml shows the tool gripping the hour hand preparatory to simultaneously lifting it and the minute hand from their respective staffs.4 I Fig. 5 shows the position of the tool afterv lifting a-cannon pinion from its staff.

Fig. y6 is a detail plan view partly in .section showin-g jaws of the tool gripping the .hub of the hour hand preparatory to lifting it and the minute hand from their respective staffs.

Fig. 7 is a detail elevation partlyin section of a plunger.

Fig. 8 is a detail of two chucks. -.Fig. 9 is a detail of a modification.

. Referring in detail to the different parts. 2`

designates a tubular member in which the major portion of the working parts are assembled. The tubular member 2 is provided intermediatel its ends witha fixed handle 4 and at its lower end with anxed cylindrical base `5 lhaving lower marginal recesses E, so that the hour and minute hands A and/B, respectively,l yand the vcannon pinion C of the watch may be viewed whenplacing the tool in position thereover. The base 5 is made of softermaterial than the tubular member to prevent scratching or'fotherWise--maring the polished'face of the watch dial D-during the operation ofremoving or replacing the -hands A and B. I have found that-fiber suchas isused forinsulating electrical devlcesprovides a satisfactory material for the base.

" Reciprocably mounted withiny the tubular memf .the-lever24` 35 lowerJ end l of the-lleven plunger 8 provided at its lower end with a reduced-orifice 9 and an interior beveled surfacefl, which'lattercoa'cts with'. the taperedupper portion Il Aof jaws I3 Vof .a relatively. large tubular :chuck .l 4. in .forcing the `jaws I3 to grip Vthe hub of the hour hand Aas shown by Fig.. 4,. preparatory to removing it and the minute hand B. from. their .respective staffs. .The jaws'zl3 have lips l5 at their lower ends as best shown by Fig. 8. for engagement with the underside of the hour hand hub which is arranged below and. of: slightly vgreater diameter than the minute hand which is mounted upon the cannon pinion staff 'i `The chuck* l,4-s.mounted within the plunger 8 and yieldablyheld with. its tapered,y surface ll against the beveled surface I bymeans of a relativelyV stiff coil spring 20 arranged Within the yplunger Sandbearing at its lower end .upon the chuck. Mandat its upper end against .a ball -22 located inthe upper -part of the plungerv 8.

ber 2 is av hollow The:*ball 22 ispressed by the .spring Zjil against a hand lever 24 having a cam surface126 atits underside .for .acting .upon the ball .22.

The lower .end of lever v24 hasaA notched portion 28 extending through the slotted upper portiony 30 of plungeri; whichlatter. has a slot3l in its rear. portionlthrough which the lower part of the lever" 24: extends. The lower. portion of also extends tinto diametrcally opposed notches 34 and 36 in the' upper endofthe tubular` membery 2,' which'prevent the lever; from rotating in a horizontal plane." the notch 36 also l.constitutes a fulcrumfor .the to rock upon when operated. A knob31isixed tothe. upper rear. end of the\lever 24. sothat it may be readily operated by thethumb of 'thejhand which grasps the handle 4,'t-leaving`lthe other hand free tohold 40 the watch `when":removing or replacing the han- Y Operably dle A andBforfthe cannon pinionC.

The plunger 8 is normallyiheld in vits lowered position: by 'aL-relativelyweakspring 38 which is interposed between an. internal shoulder 39: in the tubulary member 2 and an external shoulder 4U on the lowerffportion-of the plunger 8, the downward f movement `of which is normally checked bythe lower' end of the `lever contacting the'bottom of-..the fnotches 34 and 36, asishow'n mounted within the large chuck..l4 is a relatively-. small 1 chuck 42 for removing the cannonffpinion'C from its staff The `small chuck 42S'has a tapered'lower portionM'z normally yThe `bottom of n chuck I4 by an internal coil spring 46 which is interposed between the lower end of the spring 20 and the inner tapered portion 44 of the chuck 42. The small chuck 42 is provided at its lower end with jaws 48 having lips 50 at their lower ends for grippin-g and lifting the cannon pinion C from its staff E, or for replacing it upon said stai. The chucks I4 and 42 are rendered resilient with slots 52 and 54, extending from their upper portions down through their respective jaws so that each set of jaws may be pressed toward each other, as will hereinafter appear.

The tool may be operated as follows: When it is desired to remove the hands of the watch the device is lowered over the hubs of the hands until the jaws I3 rest upon the dial D and the jaws 48 press upon the hub of the minute hand B, as shown by Fig. 3. The lever 24 is then swung downward to force the tubular member 2 down until base 5 bears upon the dial D as shown by Fig. 4. As the tubular member 2 moves down the lever 24 lifts plunger 8, causing the beveled surface, I0 to compress the tapered portion. II of chuck I4 until the lips I5 are forced beneath the hour hand hub and the jaws I 3 rm1y grip` said hub. Continued downward .movement4 of lever 24 raises the plunger 8` and the chucks4 I4. and 42` until the handsare removed fromtheir respective staffs. As the plunger 8 moves up compression of the springsv 20, and 4Ii is increased so the tapered portion II of chuck I4 is rmly held against the beveled portion I0 of plunger 8 and the chuck 42 is held rmly against. the minute hand hub, thus holding the hands together until they are deposited in a receptacle where they are not liable to become lost while the` watch is being repaired.

The foregoing operations are repeated tolift the cannon pinion C from the stai E, the only difference being that thelips 50 and jaws 48Y of the small chuck 42 are forced by the jaws I3 to rmly grip the pinion C preparatory to removing it from the staff E.

If desired the small chuck 42 ,may be dispensed with for removing the handsin which case vthe chuck I4 is used for removing and replacing, the hands A and Band alsothe pinion C, but` as the hub of the minute hand B is smaller than the hub of the hour hand the jaws I3 will not engage the smaller hub so a pin 42a is employed instead of the chuck 42 to firmly hold theY minutehand hub against the hour'hand hubduring removal or replacement of the hands.

The pin 42a has a reducedk lowerl portion 56, to

pass between the jaws I3 of the. chuck I4, and a shoulder 58 to limit its downward. movementby engaging the internal tapered portion of said chuck. The pin 42a extends upwardly through a coil spring 46a and into a coil spring 20a, the former of which presses downward on the shoulder 58 to yieldably hold it against. the tapered portion of the chuck I4.

From the foregoing description it; is apparent that I have provided a watch makers tool embodying the features above-mentioned, and while I have shown a preferred form of the invention and a modified form of a, portion of the tool, I reserve all rights to such other forms and modications thereof as properly fall within the spirit and scope of the invention as claimed.

Having thus described my invention, what I claim and desire toV secure by Letters Patent, is: 1. A puller comprising a tubular member,r a plunger reciprocably mounted in said.v tubular member provided at itslower end` with an. orifice relatively small chuck and an internal beveled portion, a relatively large tubular chuck movably arranged in the plunger and provided with jaws adapted to be forced toward each other by engagement with said beveled portion when the plunger is moved upward relative to the chuck and the tubular member, means for` moving the plunger upward, and a provided with jaws extending between the jaws of said tubular chuck and adapted to be forced thereby toward each other.

2. A puller comprising a tubular member, a hollow plunger reciprocably mounted in said tubular member and provided with an orice 'at one endand an internal beveled portion, a relatively vlarge chuck provided with jaws having tapered portions, means for moving the plunger relative to the chuck to press the jaws towards eachother through coaction of the beveled and tapered portions, and a relatively small chuck having jaws extending between the jawsA of the larger chuck and adapted to be pressed thereby toward each other.

3. A puller comprising a tubular member, ra hollow plunger reciprocally mounted in said tubular member and provided with an internal beveled portion, a relatively large tubular chuck mounted within said plunger and provided with jaws, spring means pressing the chuck against theA beveled portion, means for increasing the pressure of said spring means and moving the plunger relative to the chuck to cause the beveled portion to press the jaws towards each other, a relatively small chuck within the larger chuck having jaws extending between the first-mentioned jaws to be closed thereby, and spring means coacting with the first-mentioned spring means in pressing the smaller chuck toward the jaws of the larger chuck. l

4. A puller comprising a tubular member, a plunger reciprocably mounted in said tubular member provided at one end with a reduced orifice and an internal beveled portion tapering toward said orifice, a relatively large tubular chuck movable in the plunger and provided with jaws, lips on the free ends of said jaws, means for moving theplunger and the chuck in opposite directions to each other to cause the beveled portion to press the jaws toward each other, and a relatively small chuck in the larger chuck provided with jaws adapted to -bev pressed toward each other by the first-mentioned jaws.

5. A puller comprising a tubular member, a plunger reciprocably mounted in said tubular member provided at one end with a. reduced orilice and an internal beveled portion tapering toward said orifice, a relatively large tubular chuck in the plunger provided with jaws, spring means for .pressing the chuck against the beveled portion, manual means for moving the plunger in a direction to cause the beveled portion to press the jaws towards veach other, and a relatively small chuck in the larger chuck provided with jaws adapted to be pressed toward each other by. the rst-mentioned jaws.

6. A puller comprising' a tubular member, a plunger reciprocably mountedl in said tubular member provided at one end with a reduced ori# portion, spring Vmeans-for pressingfthe chuck against the beveled, portion, manual: means for moving the plunger in-.the tubularfmember in a direction to cause the beveled portion to press the vjaws towards each other, and a relatively small chuck in the larger chuck provided with jaws having lips at their free ends and adapted to be pressed toward each other by the rsty mentioned jaws.

7. In a device adapted to remove the cannon pinion of a timepiece from its stai, a tubular member, a plunger reciprocably mounted in said tubular member and provided with an internal beveled portion, a relatively large tubular chuck tively srnall chuck arranged in the larger chuck and provided at its lower end with jaws adapted movably mounted in said plunger and provided A' at its lower end with jaws which project through the lower end of the plunger and have tapered portions, a relatively small tubular chuck arranged in the largerchuck provided at its lower end with jaws extending between the first-mentioned jaws, manual means for forcing the tubular member down against the timepiece and for lifting the plunger and the chucks, and spring means interposed between said manual means and the chucks to press upon the latter and thereby allow the plunger to start upward ahead of the chucks, thus causing the beveled portion and the tapered portion tol coact in causing the jaws of the larger chuck to force the jaws of the smaller chuck to grip the cannon pinion preparatory to lifting the latter from its stai.

8. In a device adapted to remove thehour and minute hands of a timepiece from their respective staifs, a tubular member, a plunger 'reciprocably mounted in said tubular' member and to pressv down upon the minute hand, manual means adapted to force the tubular member down against the` timepiece and lift the plunger and the chucks, and resilient means interposed between'said manualr means and the chucks to press down upon the latter and thus allow the plunger to start upward ahead of the chucks, thereby causing the beveled Aportion to effect engagement of the jaws of the larger chuck with the hour hand preparatory to lifting the vsame and the minute hand from their respective staffs.

9. In a puller, a tubular member, ahollow plunger reciprocably mounted in'said` tubular member and provided at its lower end with a reduced orifice, a relatively large tubular chuck movable in said tubular `member and provided with jawsadapted to be forced into the orice and thereby press the jaws towards each other, manually operated means for moving the chuck towards the orifice to force the jaws into the latter, and a relatively small chuck having jaws extending between and adapted to be forced toward each other by the jaws of the larger chuck. v

JOSEPH H. MEINHARDT.

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