Патент USA US2411975код для вставки
Dec.l 3, 1946. ` I G. D. NELSON I \ ' 2,411,975 PÉNC IL-LIKE IMPLEMENT Filed Jan. 22, 1945- ' GEORGE D*.NELs oN, . ' INVHvToR. _ ATTORNEY '2,411,975 Patented Dec. 3, 1.*946 UNITED , STATES ’ . f f PATENT OFFICE 2,411,975 PENomLiKE IMPLEMENT George D. Nelson, Los Angeles, Calif. Application January 22, 1945, Serial No. 573,851 (C1. 12o-_13)l ~ The invention relates to a pencil-like imple ment for housing, advancing and retracting a stick of material such as a crayon, or eraser of rubber or other material, or, in fact, Ta stick òf buffing material or the like. . . An object of the vinvention is to provide a inan ually-'operable feed mechanism >and casing ar rangement wherein the stick of material may be almost as long as the length of the implement itself, and wherein the casing of the implement may accommodate a stick which ñlls a major por tion of the bore or casing. Another object of the invention is to provide such an implement having a feed mechanism which is simple in construction and wherein the device is reversible in that the feed mecha nism may be mounted in either end ofthe casing. For further details of the invention reference may be made to the drawing, wherein: 2 the internal diameter of the thread 3, the inside òf ring or lsleeve I0 having a bore II in which sli'dably'íìts the stick I2, which may be an eraser, crayon, buñing stick or the like. Rotatably ñtting in the thread 3 is a nut I3 having a mating external thread I4. The nut I3 at diametrically opposite points in its periph ery has shallow grooves or recesses I5 and I6, as shown in Fig. 4, to slidably ñt and receive the strips ‘I and 8, respectively. Integral with the front oînut I3 and arranged between the strips -I ands is a cylindrical sleeve Il serving as a hold er for the rear end I8 of the stick I2. The holder Il 'serves t0 removably hold- frictionally or other wise, the rear end I8 of the stick so that an old 'stick may be removed and a new one inserted and held therein. In order to iise up as much of the stick I2 as possible, preferably the external diameter of the Figure 1 is an enlarged, longitudinal sectional 20 holder I'I is slightly less than the` sleeve ID so that the mit I3 can be advanced until the holder' I'I View of a pencil-like implement according to the present invention. y fits within the sleeve I0. ,_ Atthe' front 0f Casing 2 there is provided a tip Figs. 2 to 6, inclusive, are sectional views on I9 having a conical wall 20 having a hollow coni lines having corresponding numbers in Fig. 1. lFig. 7 is a schematic, longitudinal sectional view 25 cal bore 2l which converges to an outlet 22 in which the forward end 23 of th'e stick slidingly of the implement of Fig. '1, enlarged about one iits.'A The rear end of tip I9 is provided with a and one-half times. , reduced section 24 having an yexternal screw Referring in detail to the drawing, the im thread 2_5 to ñt in the casing thread 3. plement I 0f this invention is shaped somewhat like a pencil and comprises an elongated, cylin 30 The parts above-described are reversible, as drical casing 2 which may b_e of plastic or other’`material, and provided with an internal screw' thread 3. The thread 3 preferably extends the the tip VI9 may be screwed into either end 4of the casing' 2, the plug extension S will frictionally en gage the thread 3 at either end of casing 2, and rear end of casing 2 is provided a rotatable cap' 4 in whichy is secured a central plug 5 having a aid in frictionally holding the rotatable cap 4 on the nut I3 may be screwed into the casing 2 at full length of the casing 2 to effect an economy in assembling the device in that the parts are 35 either end thereof. This eiiects an economy in the manufacture and assembly of the device. reversible as will be explained hereafter. At 'the The'` added frictional means which serves to the end of~ the casing- may result from frictional plug extension B which frictionally ñts in the bore of the threads 3, to prevent lcap 4 _and itsY 40 engagement between the sleeveA I0 and the vscrew associated parts from accidentally‘dropping out. It has been found that this frictional engage ment, plus some added friction later described, is sui‘l‘icient for the purpose, although a more threads 3, resulting from the fact that the metal strips' »_'I Vand’ii are quite flexible and due >to lthis andalso to accidentalcon-nection of these strips Vto the sleeve I 0 out of alignment, the sleeve I0 complicated arrangement may be provided, if de 45 may, due to spring action of the strips 'I and 8y tend to assume an offset position. sired, for rotatably supporting cap 4 in\ the end By rotating the cap 4 in one direction or the _ , other, the strips ‘I and 8 serve to advance or re Adjacent the periphery of plug 6 is secured a tract the nut I3 and the holder I'I and stick I2 -spindle in the form of a pair of diametrically opposite thin metal strips 'I and 8 which extend 50 carried thereby. In effect, a three-point support is provided for substantially parallel to each other for almost the stick I2, as it is supported at its rear end by the full length of the casing 2. The forward ends the holder I'I, at an intermediate point by the of the strips 'I and 8 are suitably secured as by sleeve I0, and at its forward point by the out means of solder 9 to a sleeve I9 of thin metal and having an external diameter slightly less than 55 let 22. of casing 2. 2,411,975 3 4 said screw thread, said nut having shallow op The converging conical bore 2I serves to guide posed recesses in the periphery thereof, a holder the forward end 23 of the stick outwardly through for the rear end of said stick on the forward end the tip I9. of said nut, a rotatable cap on the rear end of As shown in Fig. 7, nut I3 may be retracted to the rear end of the casing 2, and the stick IZ Ci said casing, a, pair of substantially parallel strips secured at their rear ends to said cap and slidably may be substantially as long as the casing 2. receiving and ñtting said recesses, a ring secured Also, ring I0 may be thin and large enough to to the forward ends of said strips, said ring hav loosely fit in the threaded bore of casing 2, and strips 'I and 3 may be thin and extend close to the threads 3, where the diameter of stick I2 ing a bore to slidably support an intermediate portion of the stick, the forward end of said cas may be more than one-half and, in fact, about ing comprising a conical wall providing a con three-quarters or more of the internal diameter of bore of threads 3 in the casing 2. verging bore, the forward end of said conical wall defining an outlet in which the stick slidingly ñts, said conical wall serving to guide the stick to said outlet. As rubber deteriorates when exposed to the light, and as it may become soiled when handled, both of these defects are overcomein thecase ` that the stick I2 is a rubber eraser, because the casing 2 excludes the light from the eraser and prevents it from becoming soiled. An ordinary pencil eraser, such as the one usu ally provided on the end of _a lead pencil, tends to creep out of its ferrule or holder when the eraser is in use. This is prevented in the usual case by crimping the holder into the body of the eraser. By actual test of the implement of Fig. 1, it has been found that when employing an elon gated rubber eraser for the stick I2, it does not creep outl of its holder Il, illustrated as a cylin drical cup, evfen though the interior wall of holder Il is smooth, as illustrated. In one of the tests the inside wall of the holder Il was provided with a partial screw thread to grip the rear end of the eraser, but it was found that this was not necessary. The rear end of the cup-shaped holder Il may be provided with a rearwardly converg ing conical portion 26 and the rear end I8 of the eraser I2 may be similarly tapered to fit therein. The reason why the rubber eraser does not creep out of the holder Il is probably due to the fact that when the eraser is in use, all of the flexing of the eraser takes place either at the outlet 22 or at least Abetween the outlet 22 and the intermedi ate support provided by the ring Iß, whereby there is no lateral flexing or creeping tendency at the holder I'l, while the downward pressure on the forward end of the eraser pushes it more ñrmly in the holder Il. Therefore, it is unneces sary to crimp the holder I1 into the body of the eraser as is ordinarily done with a lead pencil eraser, but instead the holder I1 may constitute means for removably holding the rear end of the eraser which facilitates its insertion and removal. Various modifications may be made in the in vention without departing from the spirit of the following claims. For example, one may dispense with the reversible feature above-described and make the tip I9 integral with the casing 2. I claim: . _ 1. A pencil-shaped implement for a stick of ma 2. A pencil-shaped implement for a stick of ma terial, viz, crayon, eraser or the like, said imple ment comprising a casing having an elongated cylindrical wall, a screw thread on the inside of said wall the full length thereof, a nut in said casing rotatably ñtting said screw thread, means on said nut for removably holding the rear end of said stick, a rotatable cap ñtting either end of said casing, said cap having a smooth plug por ' tion frictionally ñtting in the threaded end of said casing wall at either end thereof, a conical tip providing a converging bore, the rear of said tip having an external screw thread ñtting in said casing thread at the other end of said cas ing, the forward end of said tip defining an out let in which the stick slidingly fits, said tip hav ing a conical wall serving to guide the stick to said outlet. 3. A pencil-shaped implement according to claim 1, wherein said strips are thin and closely adjacent to said casing thread, said holder, said ring bore and said outlet being constructed and arranged to accommodate a stick having a cross sectional area at least as large as one half of the cross sectional area of the inside of said cas ing. 4. A pencil-shaped implement for a stick of material, viz., crayon, eraser or the like, said im _ plement comprising a casing having an elongated 4 5' cylindrical wall, a screw thread on the inside of said wall, a nut in said casing rotatably ñtting said screw thread, said nut having a shallow re cess in the periphery thereof, a holder for the f rear end of said stick on said nut, a rotatable 'I cap on the rear end of said casing, and an elon gated strip secured at its rear end to said cap and slidably receiving and ñtting said recess, the for vïard end of Said casing having an outlet for the s ick. " 5. A pencil-shaped implement according to claim 4, wherein said strip is thin and closely ad jacent to said casing thread, said holder, and said outlet being constructed and arranged to ,_ accommodate a stick having a cross sectional area terial, viz, crayon, eraser or the like, said imple 60 as large as the major portion of the cross sec ment comprising a casing having anv elongated tional area of the inside of said casing. cylindrical wall, a screw thread on the inside'of said wall, a nut in said casing rotatably fitting GEORGE D. NELSON.