US1469787A - Lead pencil - Google Patents

Description

i Mews? IN VEN TOR. I f ad l ATTORNEY HAACK LEAD PENCIL l Filed Jan. l2. 1922 WXLLIM l". H-MCE,

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application sied January anni in. a2ac a.'

To all w hom may concem Be it known that l, WILLIAM F. HAACi-i, a citizen o the United States, residing` at Berwyn. in the county of Cook and State of Illinois, have invented certain new and use ful linprovements in Lead Pencils, of which the following is a Specication.

This invention relates tolead pencils of the magazine type, which contain a central chamber in which the working lead is held and through which it is advanced by a plunger or pusher as tliepoint of the lead Wears away, and a magazine containing additional leads which are successively sup plied, as required,'to the central chamber.

ln an application filed concurrently herewith, Serial No. 528,601, I have disclosed and claimed a magazine lead pencil of the saine general type and embodying 4the saine broad structural features that are included in the present invention. In that applica-l tion I have disclosed a cylindrical shell,

which is preferably olf-a diaphanous or translucent material to enable the interior parts of the pencil to be visible, a single compartmental magazine located in the upper portion of the shell, ra central working chamber in the lower portion of the shell beneath the magazine to hold the Working lead, a rotatable valve4 for controlling the vpassage of the spare leads from the maga"` zine to the working chamber, and a 'plunger for forcing the I Working lead endwise Vthrough the Working chamber and the tip,v

of the pencil. My present invention includes all of the above features, but has been designed as an improvement upon the pencil of the aforesaid conipanion application mainly in the direction of providing` greater storage' capacity foithe spare leads;

this being accomplished in my present in..-` vention by the provision of a second coinpartinental magazine located beneath the upper compartmental magazine and receiving leads from the latter as the leads from the second or lower magazine are succes siifely delivered to the. Working chamber of My present invent-ion also includes other minor structural features which will hereyina-er appear, and which are particularly l adapted to a pencil havingr a plurality of spare lead magazines.

@they objectsand attendant advantages of the invention Will be apparent to'peisons skilled in the art as the saine becomes better understood by reference to the follow ing detailed description, talren in connec Jcion with accompanying drawing Where in I have illustrated one practical andworlrable embodiment of the invention and in which,

Figure l is a longitudinal axial section, showing both magazines 'loaded and the plunger or pusher at its maximum point advancement;

Fig. 2 is a view similar to Fig. l, butVA showing the' plunger or pusher fully with# drawn, and one of the reserve leads from the lower magazine partially entered "within the Working chamber, this latter operation being eilected by holding the pencil in a horizontal position; Y

Figs. 3, 4 and 5 are cross sections taken on the lines 3-3, #fi-a and 5"5, respectively, of Fig. l;

Fig. 6 is a iragmental longitudinal section o f the Working chambers-nd the surrounding instal .tip or ferrule showing the position of the leadfretaining spring inthe empty working chamber.

Fig. 7 is a fragmentary longitudinal secw tion taken on the line 7? of Fig. 3. Referring to the drawing, l5 designates the cylindrical body or shell of the pencil, which is made of any suitable dia-phanous or translucent material which will enable the iiin terior parts to be observed through the same. The inner wall of the shell B is formed with'a group of spaced longitudinal grooves or channels A extending` the 'full length thereof, said grooves or channels conm stituting lead holding cells of a pair of upper and lower magazines. The leads@ are shown as occupying the cells A, and the leads of the upper magasine are cloni-ined laterally within their respective cellsfby a lcylinder T located coaiiially Within the shell B andot length approximately one-half the length of the shell.

The leads in the cells of the lower maga' tially il form in cross section, as shown in inater disclosed. The

, of the plunger.

en 'il 69,7267

Fig. el, and its side walls are united to inwardly turned lipsvor flanges on the longitudinal margins of the split cylinder V., so that the working chamber D constitutes virt1 ally a re-entrant portion of the magazine cylinder V. The lower end of 'the lower magazine cylinder V is attached to and centered by a disc G which'abuts against the lower end of the shell B and forms a bottorn rest for the leads in the lower magazine, as clearly shown in Figs. 1 and 2. Continuouswith the working chamber D is a narrowed substantially cylindrical extension D which guides and supporte the lower portion of the working lead and is formed with a narrow longitudinal slot for a purpose here lower end oi the er;` tension if is secured by soldering or otherwise to the lower end of the tapered tip of a metal errule E `that is rotatably fitted on the lower end of the shell E.

Frictionally mounted on the working chamber extension D is a spring collar R, depending from which is a leaf that, when the working chamber is emptied, springs through the narrow slot in the inember D and closes-.the latter as clearly shown in Fig. 6. When, however, the lead is forced downward through the working chamber, its point il' forces the spring R outwardly, and the latter, bf reason of its ricticnal grip or drag' on t e lead prevents the latter from fallingfout of thepencil. This lead retaining device is identical with the lead retaining device shown and claimed in aforesaid companion application.

H designates a plunger or pusher having at its upper end a spiral ll" that fio-operates with a tube K formed with an internal spiral or screw thread fitting the spiral l-l The upper end of the spiral tube K is united to a cap L sleeved on the bodyor shell B by being soldered to the cap L et O, and centered and supported by a disc or spider M. The cap L is longitudinally slitted 'at diametrically opposite points, as shown at L in Fig. 2, to permit its applicaw tion and withdrawal.

ear its lower end the plunger H is formed witha pair of lateral lugs S (Figs. 1, 2 and el), which, by conta/ct with the side walls of the working chamber D, hold the plunger against rotation on its longitudinal axis when the cap L and spiral tube ,l are rotated to advance or retract the plunger. Thelower end of the plunger is 'further proi vided with a depending nger l which, alter .which the leads the lead has dropped into the working cham.- ber and ie fully centered within the latter, overlapsthe up er end of the lead und prevente it from tilting out ol engagement with the plunger.

The sleeve or collar Q is formed with a vertical Swell, shown in Fig. 3, through in the upper magazine are spring Rf.,

passed into the lower magazine before their introduction to the working chamber.

Briefly describing the manner of loading and manipulating the pencil, and assuming that both. magazines are empty, the cap L with its attached tube K and plunger ll' are withdrawn from the shell, and the several compartments or cells ot the upper magazine are loaded with leads. The tip lerrule E is then rotated on the shell B which carries the slot or port ll ol' the valve successively into register with the lower ends oi' the leads in the upper magazine, so that the latter successively drop into the cells of thelower magazine and fll the latter. The cells of the upper magazine are then lled through the upper end of the shell, and the ce. plunger and plunger operating tube are then ire-applied. The pencil is then held horizontal, and the working chamber D is rotated by turning the ferrule E until its entrance channel is uppermost and registers with one of the cells of the lower magazine, whereupon the lead insuid cell drops into the working chamber, this being indicated in Fig. 2. By turning the cap L in the proper direction, the plunger is advanced into engagement with 'the upper or inner end oi' the lead, with the finger P overlapping its upper end and preventing it from dropping back out of the working chamber. .de the point of the lead wears away, the lead is gradually fed for-y ward by the plunger.

llhen the nent lead is required, with the 100 pencil held horizontal the working chamber is brougl'it into register with the next cell of the lower magazine and the lead thereof follows into the working chamber. This brings the previously emptied cell into reg- 165 ister with a loaded cell of the upper maga* zine through the port U of the valve, so that the lead in the upper magazine drops into the lower magazine. ln this way, as fast as the leads in the lower magazine are used 110 un, the cells of the lower magazine are refilled from the upper magazine, so long as leads are left in the latter. rdinarily the upper magazine will be reloaded .as soon as it is empted, which condition is 115 readily i `seri/'able through the diaphanous shell of the pencil; but, of course, both magezines can be entirely emptied before reloading, it' desired.

A leading vention, which also inheres 1n the invention forming the subject matter of the companion application alcove identiiied residesl in the translucent 'character olf the shell, in combination with a working chamber and two ml magazines so co-ordinated and related that under a relative turning movement, the reserve leads in the upper magazinecan be ted onel at a time into the lower magazine, while the leads from the latter are being 130 advantage of 'my present in- 120 fed to the working chamber, the manipulation of the parts being observable through the translucent shell. Manifest-ly the specific details hereinshown and described for purposes of illustration may be variousl modified without altering the substantial character of the .invention or sacrificing any of the advantages thereof. Hence, I reserve all such'variations and modifications as fall within the spirit and purview of the appended claims.

1` In a magazine pencil', the combination of a cylindrical shell, upper and lower magazines for holding leads in said shell, a working chamber within said ImVerQmagazine adapted to receive the leads successively from the latter, means for controlling the passage of leads from said upper magazine to said lower magazine, and means for forcing a lead endwise through said working chamber.

2. In a magazine pencil, the combination of a diaphanous'cylindrical shell, upper and lower compartmental magazines for holdingv leads insaid shell, a working chamber witliin said lower magazine adapted t'o receive the leads successively from the latter, a rotatable lvalve controlling the passafe of leads from said upper magazine to said lower magazine, and means for forcing a lead endwise throughs'aid working chamber.

3. In a magazine pencil, the combination of a cylindrical shell longitudinally channeled on its innerv surface to form magazine cells for leads, an inner tube `constituting a guard for the4 open sides of said cells and forming with the latter a compartmental magazine, a rotatable valve member forming a' rest for the leads in said magazine and provided .with an opening for the passage of the leads therethrough, a Working chamber beneath said valve member adapted to receive the leads passed through the latter, and means for forcing a lead endwise through said working chamber.

4. In a magazine pencil, the combination of a cylindrical shell longitudinally channeled on its inner surface throughout its full length to form magazine cells for ieads, upper 'and lower inner tubes constituting guards 'for the open sides of said cells and forming with the 'latter upper and lower compartmental magazines, said lower tube having a longitudinal slot, afrotatable valve' member connecting the meeting ends of said tubes and providedwith an opening for the passage of leads from the upper to the lower magazine, a working chamber Within said lower tube having an entrance way for leads registering with the slot of said lower tube, and means for forcing a lead endwise through saidA Working chamber.

WILLIAM F. HAACK.

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