US1720717A - Magazine pencil - Google Patents

Description

A. F. BUMPUS MAGAZ INE PENG IL July 16, 1929.

Filed Jan. 22, 1927 2 Sheets-Sheet July 16, 1929. A. F. BUMPUS MAGAZINE PENCIL 2 Sheets-Sheet 2 Filed Jan. 22, 1927 Patented duly 16, 1929. I

STATES UNITED PATENT OFFICE.

OS I. BUIPUS, OI PRESCOTT, ARIZONA, ASSIGNOR TO THE PARKER PEN COM- PANY OF JANESVILLE, WISCONSIN,

A CORPORATION OF WISCONSIN.

V meaz'mn PENCIL.

Application filed January 22, 1927.. Serial No. 162,828.

This invention relates to pencils of that character in which relatively long leads are' carried, which leads may be fed automatically forward as they become worn.

The general object of the invention is to provide a pencil of this character which is relatively simple in its construction,,which may be cheaply made, and which is positive in its action. A further object is to provide a pencil of this character in which the magazine for the leads is provided betweenthe outer case and an. inner member, the outer case being removable so that anew lead may be removed from the magazine and inserted within the pencil. Other objects have to do with the details of constructionand arrangement of partsto appear more, fully hereinafter.

My invention is illustrated in the accompanying drawings wherein Figure 1 'is a longitudinal sectional view of a pencil constructed in accordance with my invention; I

Fig. 2 is an elevation of the lead guide;

Figures'3 and 4am end views thereof;

Fig. 5 is an end view of the expeller;

Fig. 6 is an elevation of the indented groove;

Fig. 7 is a longitudinal section of the tip;- -Fig. 8 is an elevation of the thimble;

Fig. 9 is a longitudinal section of a modified tip;

Fig. 10 is an elevation thereof; r

Fig. '11 is a side elevation-of the barrel Fig. 12 is'a side elevation of the magazine; Y 1

Fig. 13 is an end view thereof;

, Fig. 14 is a sectional view of the eraser holder; 1

Fig. 15 is an elevation thereof;

Fig. 16 is an elevation of the eraser clamp;

Fig. 17 is a section on the line 17- 17 of i res 18 and 19 are elevations of-the mem r 31. y Referring to these drawin it will be seen that the lead is contained wit in a lead guide 10 which is tubular in. form, has a length 59 ve nearly the le h of the pencil, and I which is longitudina ly slitted for its entire length, as at 11. Operating within the .lead gui e is the e ler 12, the rear rtion of which is convo uted so as to provi e a series of upstanding fins 13 operating within the slot 11 so that while the expeller may move longitudinally along the lead guide, it cannot rotate therein. The lead guide 10- is fitted within a seat 14 formed within a tip 15, this tip having a longitudinally extending bore 16 through which the lead of the pencil is projected. As illustrated in Figure 7, the wall of the seat 14 is formed with a lug 16 which engages within the slot 11 and holds the tipand the lead guide for coincident rotation.

Rearward of the seat 14 the tip 15 is formed with a relatively larger seat 18 or socket to receive the threaded member 19.

This is.preferably a spirally indented tube and this tube is rigidly secured to the sleeve 20. This sleeve 20 has an interior diameter fitting the indented tube 19, an enlarged exteriorly screw-threaded portion 21, and a further enlarged portion 22 having an exterior diameter the same as the largest diameter of the tip 15. The tip 15 at its rear end is reduced in its exterior diameter to fit within the portion 22, as shown in Figure 1.

Engaging the screw-threaded portion 21 of this sleeve 20is the barrel 23 and disposed within this barrel is a tubular member 24 constituting a lead holder and with the barrel 23, amagazine. The exterior face of this member 24 is corrugated as shownin Figure 13, so as to form a series of circumferentially arranged sockets or rebesses within which the leads may be disposed. The rear end of this magazine 24 is flanged as at- 25, so as to form .a base having a diameter nearly the same as the interiordiameter of the barrel 23; It is to be noted that the rear end of the magazine 24 is some what tapered or gradually reduced in diameter from a oint in advance of the flange 25 released from engagement with the intermediate sleeve 20 and drawn backward, ex-

the leads and asthe barrel is drawn off of the magazine 24, the leads will tend to 190 spring outward into a flaring position or divergent relation to each other so that the leads ma be readily selected and withdrawn. e rear end of the barrel 23 is formed to contain a rubbereraser 26 which 105 is preferably so engaged with the barrel that the eraser may be gradually withdrawn as it is wgrn. A cap 27 is adapted to fit over the end of the barrel it desired so as to cover this eraser. As illustrated in Figure 11 the I back to the ange. The barrel 23 when it is 3 barrel is constricted as at 28, forward of crating therethrough and having a fin err-- its rear end and the rear portion of the tended out through said slot, a tapering tip I barrel is formed with indented screwin which the lead guide is mounted for rotathreads 29which grip the eraser 26 but pertion with the tip, a spirally indented tube 5' mit the eraser to be turned so as to feed it surrounding the lead guide and with theoutward. If a more adjustable eraser holder spiral indentations of which the expeller enis desired, then the construction illustrated g g s, a sleeve supporting-said tube having i invFigure 14 is usedwherein the barrel is engagement with the rear end of the taperthreaded, as at 30, to receive a block adapted ing tip, a barrel detachably engaged with 10 to be rotated by legs 32 which areformed as Said Sleeve, and magazine extending over part of the eraser holder or tapered ring 33. the spira y indented tube and having cn- 'In this form of pencil, the lead in use is gagement with said sleeve at one end, thekept fro sliding out thro h th ti d space between the magazine and the barrel f th uide b litti th id d constituting a lead receiving space, the ex- 15 slightly compressing it but this may also be rface Ofthe magazine being longiaccomplished by slitting the tip, as at 34 in tudmally g Figure 9. In this type of pencil, .if it is .3. A pencil of the character described indesired to project the lead, the tip is rotat d eluding a centrally disposed, tubular, longito the right. This actsto rotate the pencil dmal y Slot ed lead guide, an expeller op- 20 guide and, of course, rotate the expeller crating therethrough and having a fin ex- Th fins 13 ng th i d t d screwtended out through said slot, a tapering tip threads of member 19 so that as the tip is i Which the lead guide is mounted for rotaturn d, th ex ll 12 engaging th screwtlon with the tip, a spirally indented tube 89 threads will be forced forward. When the Surrounding the lead guide and with the.

.25 ti i t d i a, reverse di tie th spiral indentations of which the expeller enpeller Will be turned backward to its initial g a Sleeve pp g Said tube having position. After a lead has'bcen used up, 9 g g with the real end of the p the used up extremityof the lead is Withm barrel detachahly ehgwed with drawn f th il nd a new l d said'slceve, and a magazine extent ing over 30 b t k f th in b in th the spirally indented tube and having enb r l 23, removing th new l d f th 'gagement with said sleeve at one end, the magazine, putting on the barrel again, then jpace between the magazine and the barrel in e ting thi l d v b tt d f m t constituting a lead rece1v1n space, the ex- 90 K through the tapering tip 15, grad ll t terior surface of the magazine being longiing the'expeller .back to its initial position tudihalry grooved, and the T031 end of the to accommodate the lead as it is inserted. magazine b g slightly tapering and having I claim a flange. 1. A pencil of th character d ib d i 4;. A pencil ofthe character described meluding a ntrall di d t b l 1 1- eluding a central tubular longitudinally slottudinally slotted lead guide, an expeller opted lead gu1de, 'an expeller operating thereerating therethrough and having a fin exthrough havmg l out tended out through said slot, a tapering tip h gh the Slot, a R 1n Whlch the lead in which the lead guide is mounted for rotagulde 15 m a p r y indented u tion with th ti i ll i d t d. t b surrounding the lead guide and with which 45 surrounding the lead guide and with the Spiral indentations the fin of the P spiral indentations of which the expeller eng g a sleeYe -PP g Said e it g gages, a l v u o ti id t b h i engagement withthe rear end of'said tip, a engagement with th rear d f th t barrel engaged with the sleeve and a magaing tip, a, barr l d t h bl enga d ith, zine extending over and having engagement 50 aid l v and a magazine exten ing oven with the sleeve at one end, the space-between the spirally indented tube and having n-l the magazine and the barrelconstituting a gagement with said sleeve ,at one end, the lead receiving space, one of the walls of the space between the magazine and the barrel space being longitudinally channelled. 11o constituting a lead receiving space. In testimony whereof I-hereunto afiix my 55 2. A pencil of the character described insignature. I

eluding a centrallyv disposed, tubular, longii 1 tudinally slotted lead guide, an expellerop- AMOS F. BUMPUS.

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