US1614463A - Magazine pencil - Google Patents

Description

`am., i8, 1927.

H. P. FAlRcmLD MAGAZINE PENCIL Filed May 14 1924 Patented Jan. 18, 1927.

UNITED STATES PATENT oFFicE.

HARRY P. FAIRCHILD, OF'NEW YORK, N. Y., ASSIGNOR TO FERMENE G. FIRCHILD,

, F NEW YORK, N. Y.

MAGAZINE PENCIL.

Application lled May 14, 1924. Serial No. v713,157.

This invention relates to mechanical pencils of the so-called propel-repel type, and its chief object is to provide in apencil of this class a barrel composed of telescoping sections, which can be collapsed to shorten the pencil for convenience in carrying in the vest pocket and can be extended to lengthen it for more comfortable use in writing, and which is equipped with a magazine in which a supply of leadsA can be carried sufficient for a considerable period of time even when the pencil is in frequent use. A 4further object is to provide a pencil of the kind indicated, which will stand hard usage without liability of getting out of order. With these objects in view the invention comprises the novel features hereinafter described.

One form of the invention is illustrated in the accompanying drawing, in which- Fig. lisa side view of the pencil, collapsed.

- F ig. v2 is a side viewA showing the barrel extended or lengthened for writing, portions of the two sections of -the barrel being broken away to show the enclosed parts.v

Fig. 3 is a longitudinal section showing thek mechanism by which the lead is advanced and retracted, and also showing the relation of the lead magazine to the mechanism when the barrel is collapsed.

Fig. 4 is a cross section, about on line 5--5 of Fig. 3.

Fig. 5 is a detail longitudinal section of the writing end of the pencil, showing the operation of ejecting or expellingv the lead.

Fig. 6 is a detail cross section, about on line 6-6 of Fig. 2, illust-rating an advantageous feature of the invention.

The vpencil illustrated comprises a tapered writing tip 10, and a barrel composed of a forward or outer section 11 and a rear or -inner extensible section 12, the tip vand barrel being rotatable relatively to'each other -4'.l as is customary in propelling pencils.

Fixed to the tipfand extending rearwardly into the barrelsection at the center or axis thereof is a-tube 13, having a helical slot 14,V

and fitted smoothly on'- the outside of vthis helically slotted' tube is a tube 15 having a straight longitudinal slot 16. Inside of the inner tube 13 is a tubular clutch 17, in which the rear end of the lead is vinserted and held, and which is provided with a rear i i lug 18 extending radially into the two slots 14 and 16. In the clutch tube 17 is a plunger 19, projecting rearwardly and equipped at its rear end with a lug 20, extending into the two slots 14 and 16 in rear of the lug 18. Assuming that the tubes 13 and 15 can be rotated relatively to each other but cannot move lengthwise, it will be seen that rotation of the inner (helically slotted) tube in the direction of the arrow in Fig. 5 will cause the clutch tube 17 and plunger 19 to move together toward the tip '10, thereby advancing the lead, which is shown at 2l, and that-rotation in the opposite direction will retract the lead.

At its forward endlthe longitudinal slot 16 in tube 15 has a short lateral recess or circumferential extension 22, Fig. 5. Then when the clutch 17 has been advanced, as described above, until the lug 18 has reached the forward end of slot 16 the clutch can advance no further, and the lug turns into the lateral recess; but the lug 20 on plunger 19 can still advance,'thereby ushing the plunger ahead and causing its orward end to expel or eject the lead from the clutch. When the parts are rotated in the opposite u. direction the reverse movement takes place,

as will be readily understood: the plunger is irst retracted, thereby permitting a fresh lead to be inserted into the forward end of the clutch, after which the clutch itself is retracted. u

For convenient actuation of the mechanism described above, the enlarged forward end 23 of the screw or helically slotted tube 13 is soldered or otherwise'fastened to the tapered tip 10, and the guide bushing 24, which Iextends into the tip 10, is soldered to the barrel section 11 and alsoto the end of the longitudinally slotted tube 15. It will therefore be seen that rotation of the tip 10 relatively to the barrel, or vice versa, will cause relative rotation of the helically and longitudinally slotted tubes, thereby causing the described movement of the lead. Lengthwise displacement of either tube rela- .'tive to the otheris prevented bythe collars 25 and 26 soldered on the ends of tube 13. The tip 10 and barrel sectiony 11 are thus rotatable relatively to each other but are inseparable lengthwise. f'

The telescoping slides inside of the forward section 11, en. closes a magazine tube 27, shown in Fig. 4

as being in cross section similar to a sixbarrel section 12, which pointed star, soldered or otherwise secured to the barrelv section 12'and fitting snugly therein to provide cells 28 for the individual leads 29. I`hese cells are closed at the forward end by a ring 2ea soldered to the tube 27. On the rear portion of the longitudinally slotted tube 15 is a lug or rib 30 extending into one o1' the grooves between the ribs on the magazine tube 2T, as indicated in Fig. 3. lt will therefore be seen that the inner tclescoping barrel section 12 can be drawn rearwardly out of the main section l1, carrying with it the magazine 27, and that lengthwise separation ot' the barrel sections is prevented by the lug or rib 30, which lies in the path of the ring 28a. In the pencil shown the hexagonal shape of the telescoping barrel sections makes relative rotation of these snugly itting parts impossible. It' the barrel sections were cylindrical, such movement would be prevented by the lug or rib 30, as will be readily understood, since this rib extends into one ot the inner grooves of the magazine tube 2T and the latter is fixed to the barrel section 12. 'Ihe rear end of the magazine tube is extended slightly beyond the tubes 13 and l5 to receive a short screw 31, which is lixed in the end of the magazine by solder 251 or other convenient means. The lead cells 2b are closed at the rear by removable cap 32 threaded on to the screw 31. This cap also aiords convenient grasp for the lingers when the user desires to lengthen or shorten the pencil by telescop` ing movement of its parts.

In the form illustrated in Fig. 6 the sliding longitudinally slotted tube l5 is formed with one or more ribs 15 (in the present inlstance three) extending its full length and iitting in the inner eorrugations of the magazine tube 27 so as to slide therein. In this construction, which aiilords great strength and smoothness ot operation, the lug 30. (Figs. 2 and 3, not shown in Fig. 6) serves merely as a stop to prevent the telescoping barrel-section and magazine from being drawn entirely ofi'.

From the foregoing it will be vseen that when the barrel sections are telescoped together the pencil is short enough to be carried conveniently in a small pocket or in a small purse, but that it can be extended to a convenient length for writing as in Fig. 2, merely by pulling on the cap 32. To actuate the lead, that is, to advance, retract or expell the lead, it is not necessary that the barrel be collapsed; and since the magazine is carried by the rear of inner barrel section,

access to the magazine for removal ot leads can be had with this section extended as well as in the collapsed position.

vIt is to be understood that the invention is not limited to the construction herein specitically illustrated and described but can be embodied in other forms without departure from its spirit as defined by the appended claims.

I claiml. A magazine pencil having, in combination, a longitudinally extensible and collapsible barrel composed of relatively telescoping main and rear sections, lead actuating mechanism housed within said main section 0I the barrel and longitudinally stationary therein, and a magazine carried by the rear section of said barrel and slidable within the other section, said magazine surrounding and sliding over the lead actuating mechanism between the latter and the main barrel section in the tclescoping movement of said sections.

2. A magazine pencil having, in combination, a barrel composed of a main section and a rear telescoping section, mechanism extending lengthwise of the main barrel section and having parts rotatable relative to each other to advance and retract the. lead, a magazine carried by the telescoping section and surrounding said mechanism, and means connecting the magazine with one of the relatively rotatable parts ot said mechanism to rotate said part when the telescoping barrel section is rotated, and permitting sliding movement of said mechanism and telescoping barrel sections relative to the main barrel section.

3. In a magazine pencil, in combination, a barrel comprising a main section and a rear section telescoping into the main section, mechanism extending lengthwise of the main barrel section and having p arts rotatable relative to each other to advance and retract the lead, a rotatable writing tip at the forward end of the main barrel section, one part vof said lead advancing and reti-acting mechanism being connected to said tip and the other to said main section, a lead maga zine carried by the telescoping section otl the barrel and surrounding said mechanism, and meansfor operatively connecting said telescoping section and one of said relatively rotatable parts. l

-II1 testimony whereof I .hereto aiix my signature.

HARRY P. FAJRoHiLD.

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