US1621048A - Pencil - Google Patents

Description

F. B. ACKERMANN ET AL PENCIL Filed Sept. '7. 1923 ,March 15, 11927 mvENToR ATTORNEY Patented Mar. 15, 1927.

FRANK B. ACKERMANN, WILLAM C. STEFFAN, AND WALTER J'. GREINER,=OF

v y CHICAGO, ILLINOIS;V i j l y PENCIL. i

Application led September 7, 1923. Serial No. 661,491.

This invention relates to pencils, land more particularly to pencils of mechanical lead feeding type, and an object of the invention is to provide a magazine pencil structure in which the lead is fed through the point of the pencil by rotation of a 'cap at "the butt of the pencil and one in which the lead feeding means is charged from the tip of the pencil.

Another object of the invention is to provide a mechanical pencil as specified in which the lead magazine is charged and empties out at the tip end of the'pencil, and also to provide means in the pencil structure for securely holding the active lead feeding means in position.-

` The present invention is an improvement over our pencil structure disclosed inthe application filed October 2, 1920, Serial No. 414,165, and the present improved construction embodies, besides the tip charging .structure and tip opening out magazine, a simplifled more rigid and more easily operated structure than that disclosed in the application above mentioned.V v

Other objects of the invention will appear in the following detailed descriptionl taken in connection with the accompanying draw- `ings whereim-l y Fig. 1 is a side elevation of the improved pencil.

Fig. 2 is a longitudinal section through the pencil. y y

Fig. 3 Yis -a view partly inside elevation, and partly in section of a part of the barrel of the pencil structure. f

Fig.`4 is a detail view partly in side elevation, and partly in section of the lead feeding stemrand feed screw. j

Fig. 5 is an enlarged section through the cap or butt end of the pencil structure.

Fig. 6 is an enlarged section through' the tip structure. y

' Fig. 7 isa cross section on-the line 7*-7 Of Fig. 2..

Fig. 8 is a cross section on'the line 8-'8 of Fig. 2. f 4

' Fig. 9- is a cross sectionson the `line 9 9 of Fig. f y

Fig. 1() is a cross'section on the line `10-'1O of Fig. 2.

Referring more particularly to the drawings, the improved pencil comprises a casing 1, which is preferably constructed of an inner metal sleeve 2 and an outer decorative sleeve 3 of hard rubber' or analogous material as disclosed in our companion applica-jv tion filed August 20, 1921, Serial No.v 493,884.

The inner metal sleeve 2 has its'butt end v spunto provide an outwardly bulging transversely curvedportion 4 whichiits snugly inthe concave innersurface of the annulus which is formedl on'the sleeve 6, thereby connecting ther ysleeve '6 to the inner metal sleeve 2 for rotary movement but to. prevent longitudinal movement of these sleeves. rlfhe sleeve 6 has its portion outwardly of the annulu's 5. internally screw threaded [as shown at 7 to receive the threaded plug` 8, which is in turn rigidly connected by means of the upset endv 9 ofthe cylinder portion 10, to the eraser carrying sleeve 11. A decorati've eraser enclosing; cap 12 is removably mounted about the sleeve 11v and its inner end abuts the outer end of the sleeve 6 which projects beyond vthe perimeter ofthe carrying sleeve orcu'p 11.l v

'The cylindrical `portion 10 is formed as an integral part of a feeding sleeve 14 and f this feeding sleeve 14 is threadedinternally as at 1,5. 'lhese threads l'c'ooperate with the screw 16 for 'feeding the lead propelling stem 17 longitudinally lwithin the barrel`18 fortfcrcing the lead out of the constricted tip 19 of the barrel 18 and through'the tip 20of the pencil structure. e f* The barrel 18 comprises a relatively large l feeding sleeve receiving portion 21 and a reduced stem. receiving portion 22 whichterminates in the constricted tip 19. The feeding sleeve receiving portion 21denes oI posite diametricallyy y longitudinally exten ing slit-s 23 and is formed to closethese slits intermediate their end portionsv vto provide .firm frictional gripping engagement between the portion 21 and the sleeve 14 for resisting longitudinal withdrawal of the feeding sleeve 14` from the barrel1`8. The reduced stem receiving portion 22 of the barrel18 is provided with a liattened p0rtion 25 which is :adapteduto 'engagethe square portion of the 'stem 17 to hold the stem against rotation so that as the feeding sleeve 14vis rotated by rotation of the cap- 12, cup 11 and coupling sleeve 6, the stem 17 will be moved longitudinally in the barrel 18 for forcing a length of lead as shown at 26 through the tips 19 and 20.A It willbe noted by particular reference t0 Fig. 3 of the drawings thatthe tip 19 is split longitudina-lly as shown at 27 while the apex of the tip 20'i's provided with a relatively short bore 28 of uniform diameter, through which the lead isfed, thereby providing a dual lfrictional grip on the lead, and also eliminating on the tip 2O any sharp edges which tached thereto. 1 aplotion 31 which is yrelatively large in f y into the magazine space 37 within the cas-` Would engage the lead and which have a ten` dency to cause the lead to break easily during writing. f

The barrel 18 has a coupling 30 'either formed thereon' or mounted thereon and welded, shrunk, or` otherwise securely at- The k,coupling comprises diameter and which is threaded as shown at. 32 forthreading into the .lower threaded end of the inner casing sleeve 2. A portion 34 which is smaller in diameter than the portion 31 is connected to the portion 81 by the intermediate portion 35 of the coupler, the outer perimeter of which tapers as, clearly shown in Fig. 6. l

It will be noted, by particular reference .l to Figs. 3 and 10` of the drawings that the Coupling 3() is slotted, longitudinally at dia-A metrically spaced points as shown at y36 to provide space to permit the passing of leads ing sleeve 2 and about the barrel 18 thereby permitting the charging or discharging of the magazine ofV the pencil from the tip thereof. The longitudinally extending slots 36, are of sufiicient width'and depthso as to permit two, or more leads to be placed or withdrawn from the magazine through each slot. To charge or discharge the magazine thel substantially conical tip 20 must be disconnected from the` coupling 30, however it i is.` unnecessary to disconnect the coupling `40' i' tially conical tip 2O has an annulus 38 'formed integrally therewith a short distance for charging the barrel 18. yThe substaninwaidly of its*` base or enlarged end and the annu-lus 3'8 is. provided witha threaded bore 3i9which cooperates with the reduced portion 3,4; ofthe coupling 30 to detachably connect the tip 20 to the casing of the pencil ythrough :the medium of the coupling 30.

The edge 4;() at the baseer enlarged end ofv the ti.p"20.y is beveled as clearly shown in Figs. 2'and. 6 of the drawings and fits snugly against the adjacent beveled end 41 ofthe outersleeve 3 of the pencil casing.

VThe plug 8 is threaded so that it may be attached tothe coupling 6 during the assembling of'V the pencil structure. However,

tempiev material when dried forms a substantial inseparable connection between the plug 8 and the eraser cup carried thereby and the coupling sleeve 6. Y n

As shown in F ig. 1 ofthe drawings the outer surface of the annulusl 5 may be knurled or roughened so that the feeding sleeve la may be rotated either by gripping the eraser cap 12 or by gripping the coupling sleeve 6 and rotating it. v

The operation of the pencil is asy follows: `When first charging the pencil, the tip 2O is removed to permit the withdrawal of a. length of lead from the magazine 87, which length of lead is forced, from the tip 19 into the constricted portion 22 of the barrel 18,

after which the tip 2O is replaced, by thread# f ing the portion 34 ofthe coupling into the annulus 38. The cap 12 is then rotated,

which in turn rotates the coupling sleeve 6 andplug 8 rotating thev feeding ysleeve 14. The feeding stem 17 is held ,aga-inst rotation by its engagement with the fiattened portion 25 which causes movement of ,the stem 17 longitudinally in the barrel ,18' and feeds the lead 26 into writing` yposition through the tip 20.

It is, of course, to be understoodY that the invention may be constructed in otherhmanners and the parts `associated in different if relations and, therefore, we do. not desire to be limited in any mannereXcept as set forth in the yclaims hereunto appended. Having thus described we claim is n y y 1. In a pencil, a casing comprising an inner sleeve, a couplingsleeve provided with an annulus having an inner concave surface,l

said inner sleeve l extending into said coupling sleeve and having its end vspun outwardly into said annulus for connecting said p sleeves for relative rotary movement, a plug carried by said coupling sleeve, ari/eraser cup rigidly connected to saidplug and adapted; for rotation synchronously with said coupling sleeve, and lead feeding means adapted to be operatedbyrotation ofthe coupling sleeve, a lead guiding barrel withinu said in-v nersleeve, a coupling carried by said barrel,

va tip detachably-connected to said coupling,

said coupling being detachably connectedto said inner sleeve.

2.. In, combination a sleeve threadedr internally. at its lower end, a feeding sleeve including a coupling member at its flower end and threaded externally at it-s upper end portion for threaded engagement withy the internal threads of the sleeve Aand includingy a reduced thread bearing end portion, means operable by thev feeding sleeve for feedinga length ofy pencil lead through the feed-ing sleeve, and a, tip, having an internally threaded portion adapted for threaded engagementwithk the reduced. endportion of the coupling member. i

our inventionv what 3. In a pencil, a barrel, a coupling carried by saidbarrel, a substantially conical tip,y

sleeve provided With a threaded portion, and

a threaded portion on said coupling for connecting the coupling and casing, said coupling being slotted longitudinally at diametrically opposed points, the slots being of sufficient Width and depth to permit a plurality of leads to be passed through each slot to permit charging or discharging of the leads from the interior of the casing about said barrel. v

4. In a pencil, a casing comprising an inner sleeve, a coupling sleeve provided with an annulus having an inner concave surface, said inner sleeve extending into said coupling sleeve and having its end spun-outwardly into said annulus for connecting said sleeves for relative rotary movement, a plug carried by said coupling sleeve, an eraserv cup rigidly connected to said plug and adapted for rotation synchronously with saidy couplingk sleeve, and lead feeding means adapted vto be operated by rotation of the coupling sleeve, a lead guiding barrel Within said innersleeve, a coupling carried by said barrel, a tip detachably connected to said coupling, said coupling beingl detachablyv connected to said inner sleeve, said barrel provided With al relatively large `portion being split longitudinally and flattened at said split portion to increase frictional engage-v ment between the barrel and lead feeding means.

natures.

FRANK B. ACKERMANN. 'I WALTER J.- GREINER. WM. c. sTEvFF-AN.

In testimony whereof We aiiix our sig-

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