US1734784A - Pencil - Google Patents

Description

NOV.A 5, 1929 F. J. v-u-:RLING ET AL PENCIL Filed June '7. 1920 Patented Nov. 5, 1929 feinte@ i@ aieli FRANK J.` virtramitey AND.- FRED, n. BA1-t'rnoi-.oMnw,Y oF MINNEAPOLIS,- MINNEsoTA,

AssIeNons, BY AssieNMENTs, To Arrfroionw` COMPANY, or CH1 JAGO,..ILLI- NDIS., A. CORPORATION. E. IIIINOISv PENCIL Application ledJ'une 7, 1920.l "Serial No. 387,230.

Our inventionl has for. its object to provide an extremely simple and highly eiiicient pencil, and to this end it consists of the novel devices andl combinations of devices hereine after'described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout, the several Views.

Referring to the drawings Y Fig. 1 is anfelevation of the improved pen- 'cil, with some Vparts broken away and sectioned; Y y

Fig. 2 is an enlarged.v view of the pencil, with some parts sectioned'and broken away to exposethe lead feeding mechanism;

F 3. is a View corresponding to Fig. 2, with theexception that the parts are still furthe broken away and sectioned to further exposethe lead feeding mechanism;

F ig. 4 is a fragmentary detail View of the casing and lead feedingmechanism F igl 5.is a viewv similar to Fig. 4,'on a further enlarged scale, but with additional parts broken away and also showing'the casing applied thereto; p Y y l Fig. 6 is anelevation of thenut block, lead holder and lead n Fig. 7 is a fragmentary detail view of the lead holderwith some parts sectioned;

Fig, 8- is a perspective view of thel lead holder; 4 f :i Fig. 9 is perspective view` of the nut block;

F ig. 1G is a transverse line 10-10 of Fig.A 2 e Fig. 11- is atransverse section taken line 11-11 of Fig. 1; and

Fig. 12 is a transverse section taken onthe line 12.-.12 of Fig. 2.. e

Thelcasing of the improved pencil yincludes arelatively longhintermediate section 13', a point section 14, and ashort top section 15 telescopedl onto the upper end of the section 1 3. The section 14, nearits upperend,is conon ythe tracted to afford an annular shoulder 16 and then telescopedinto thelower end ofthe section' 13v and permanently secured thereto bysection taken on thek tion 14 into the section 13, and an annulargstop head1?, outwardly pressed from the section 13, limits Vthe telescopical movement. of the section 15 thereon. As shown, an inwardly projecting guide rib fl8'is pressed from the section 13, and extends substantially the full length thereof. A longitudinal bead 19y is pressed from the section `15. and its within the rib 18 to hold said section. against turningI movement on the section=13. A shell 2U, of leather or any otheri suitable material, surroundsthe casing between the shoulder 16 and stop bead 17. i i i The only thing holdingk parts 15 and 13 to.- gether is a friction resulting from their en gagement, said parts being in close -engagement,.asclearly shown in Fig. 2.

rIhe section 15, above the section 13, isiirst contracted andV then expanded to afford a neck v v thereof in' a seatformed in said cap. TheY lower end of the tube 23 is seated against the:

contracted internal wallsof the section 14-and held thereby against lateral movement, but free to turn. The member 15 with its attached parts forms what may be called a rear mem- V ber. A'vnut block 25 hasscrew-threaded' en gagement with the tube 23 and, in theperiphery thereof, isa notch `26 arranged to receive the guide. rib. 18 land. therebyholdl the nut. block against turning movement in the ,case ing, but with freedom for axial travelling Pmovementon-the tube...

Mounted in the tube 23 is a flat lead feeding baror stem 27, on the-lowerend of'whichhjr is permanently secured a sleeve 28A that/Mis longitudinally slit',` at its lower projecting, end` to form aaslot or notch, as indicated at" Y 29, to receive and yieldingly hold the upper f end of apiece of lead 30. f Obviously, the slot 29 permits the sleeve 28 to slightly expand-j when the lead 30 is forced therein toyielfzlf4 ingly hold the same. The top of the lead if pushed up in sleeve 28 by t-he writing pressure willengage the lower end of stem 27, which will form a backing for the lead. The lower end of the lead 30 is arranged to project through the lower end of the tube 23 and the Open end of the point section 14, and is guided thereby. On the upper end of the leadfeeding bar 27 is a head 31 having a pair of'longitudinally spaced lugs 32, which eX- tend through the slot 24 to receive therebetween the nut block 25 to connect the lead YVfeeding bar 27 thereto for travelling movement therewith. It will be seen that bar 27 may have some lateral orrwobbling movement as it is considerably narrower than the bore of tube 28 and the slot opening into said bore as clearly shown in Figs. 3 and 10. Obviously, by holding the casing and turning the cap 22, the tube 23 may be rotated to cause the nut block 25 to travel thereon, either to project or retract the lead 30. As clearly shown in Figs. 2, 4, 5 and 10, the nut block 25 moves in contact with and4 is guided by the inner 'wall of the'casing 13. This has been lound to be very advantageous.

The above described invention, while extremely simple and of small cost to manufacture, has, in actual practice, proven high- 1` ly efficient for the purpose had in view.

Vhat we claim is: y

1 l. A pencil comprising a tubular shell of substantially uniform thickness having a tapered apertured lower end with a tapered chamber therein, a removable tubular member fitting over said shell and having a threaded tube disposed within said shellhaving its lower end disposed within said tapered chamber and contacting the walls thereof to be positioned thereby, said threaded tube being rotatable but normally stationary longitudinally, a nut lcarried by said threaded tube, means for holding said nut against rotation relatively to saidA shell, a lead feeding bar disposed within saidthreaded tube and having an end portion projecting through and'guided in a slot formed in said threaded tube, Vsaid lead feeding bar having a lead Y holding means thereon and ,being movable longitudinally by said nut, and means at the yupper end of said tubularV member for turning said threaded tube, said tubular member and last mentioned means being withdraw-V ablerectilinearly from said shell. n

2. AY pencil comprising two concentric tubular members and a cap member one of kwhich tubular members has a tapered apertured lower end with a tapered chamber therein, the second of saidtubular members being longitudinally rectilinearly removable Y from the first mentioned member but normally longitudinally stationary relatively thereto and'held thereon by friction, the cap member being rotatably mounted on the second tubular member and carrying a threaded tube vwhich has its lower end disposed within said tapered chamber and centered by the walls thereof, the said threaded tube having a nut rotatable thereon, said nut being held from rotation in respect to said first mentioned tubular member, a lead feeding bar disposed within said nut and. movable longitudinally thereby having a portion projecting and guided inaslot formed in said threaded tubef lower end, a sleeve frictionally fitting over` the upper end of said casing and against said circumferential crimp having an end member rotatably mounted thereon, a threaded tube secured to said rotatable end member of said sleeve and disposed in said casing and having its lower end engaging the walls of said tapered end, a nut having a slot in its side movable longitudinally of said tube, said slot iitting over said longitudinal guide rib and movable in Contact with the inner wall ofV said casing, and lead carrying means connected to said nut for projecting and withdrawing lead through said apertured endv of said casing. l

4. A pencil comprising a shell, a removable tubular member longitudinally slidable vover saidshell and frictionally held in'place thereon, a tube with threads formed in the wall thereof disposedwithin said shell, said tube being carried by said tubular member and being withdrawable with it rectilinearly from said shell for the purpose of loading a lead into said tube, said tube also being rotatable in said shell but vnormally stationary end portion projecting from said tube, and `means adapted to be turnedl for effecting rotation ofsaid tube relativelyto said-shell to propel the lead feeding bar longitudinally thereof. v

5. A pencil comprising av casing, lead feed'- ing means 'in said casing movable longitudinally thereofand held from rotation by -said casing, a tubular member Vfitting over means carried byV said tube and adapted Ytolbe turned for e'ecting rotation. of said lead holding tube relatively to said leadV feedingy ica longitudinallyof said shell, al lead'feeding I j, bar disposed within said tube'and having an iis means to cause movement of said lead feeding means longitudinally of said first mentioned casing.

In testimony whereof We affix our signatures.

`FRANK J. VIERLING. FRED R. BARTHOLOMEW.

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