US2418854A - Magazine pencil - Google Patents

Description

April l5, 1947. B. D. SMITH.

MAGAZINE PENCILl v 5 Sheets-Shee't l Filed Jan.` 19, 1944 ,...il J J April 15, 1947. B. D. SMITH A 2,418,554

MAGAZINE PENCIL Filed Jan, 19, 1944 s sneetssheet 2 pril l5, 94?. B, D, SMlTH i 2,418,854

MAGAZINE PENCIL Filed Jan. 19, 1944 3 sheets-sheet 5 @M QMMQMM Patented Apr. 15, 1947 MAGAZINE PENClL Blanchard D. Smith, Atlanta, Ga., assignor to Scripto Inc., a corporation of Georgia Application January 19, 1944, Serial No. 518,863

The invention relates to mechanical pencils and has as an object the provision of an improved spare lead magazine contained within the casing of the pencil. K It is an object of the invention to utilize space between relatively rotatable inner and outer portions of the pencil structure for a magazine'or magazines for spare leads.

It is a further object of the invention to provide a pencil having a magazine wherein the leads are retained to individual positions.

A further object is to provide a pencil having a plastic split tube molded to provide a space for spare leads.

A still further object of the invention is to provide a mechanical pencil having individual magazines with means to lift each magazine carrying the leads with them into position for ready access.

Further objects will appear from the following description when read in connection with the accompanying drawing showing illustrative embodiments of the invention and wherein:

Figure 1 is a side View of a pencil substantially full size.

Figure 2 is a detail side view showing the eraser ferrule removed and a magazine lifted.

Figure 3 is a vertical section on broken line 3 3 of Figure 4 drawn to an enlarged scale.

Figures 4 and 5 are horizontal sections upon a still larger scale on lines 4 4 and 5--5 respectively of Figure 3.

Figure 6 is a vertical section on the scale of Figure 3 taken on broken line 6 6 of Figure 4.

Figure '7 is a perspective view of a cap shown to an enlarged scale and in its form prior to assembly in the pencil.

Figure 8 is a perspective View of a split tube shown to an enlarged scale and in its form prior to assembly in the pencil.

Figure 9 is a perspective view of a magazine part shown to an enlarged scale and in its form prior to assembly in the pencil.

Figure 10 is a perspective view of a nut shown to an enlarged scale and in its form prior to assembly in the pencil.

As shown, the device comprises a barrel l shown as interiorly screw threaded with a plurality of threads, three being shown for purpose of illustration as indicated in Figure 5.

Revoluble in the barrel I5 is the split tube I6 having the channel Il for coaction with the nut portion I8 and a clutch i9 which may be of any desired form. To cause relative revolution between the barrel l5 and the tube I6, there is Claims'. (Cl. 1Z0-18) shown a cap 2t crimped at 2l into a channel 22 in the barrel I5. To cause the cap 2l) to revolve with the ferrule 23 which holds the eraser 24, the cap Z is shown as formed with ridges 25 forming a slip i-lt with the ferrule 23. The tube l is shown as formed with external portions cut away. leaving fluted inner surfaces as shown at 25, 2l, three flutes being shown in each.

To carry the leads 28 there are shown slidable carriers 29, each having a shelf 3d at its lower end and projection 3l at its upper end provided with a lip 32 which may be grasped by the user, as for instance by fingernail to lift the slide carrying the leads with it to the position shown in Figure 2 where a lead may be readily extracted. The cap 2d is shown as cut away at 33, 34 to permit the passage therethrough of the slides 29 in this sliding movement. By provision of the flutes 26, 2i, the leads are retained each in individual position and do not stand askew in the magazine which tends to preserve them from breakage and abrasion.

It will be seen that attempted use of space between the split tube and the outer barrelwhich are rotated relatively to each other in the use of the pencil, must fail unless there is provided means to prevent wedging and consequent breakage of leads. Should the magazine space be provided by cutting away the material of thesplit tube or the barrel or both so that the leads would contact each other and be free to assume a tilted position in the` magazine, Vthe result would be that crossed leads would become wedged in the space and broken up by the friction of the opposite relative movement of the tube and barrel. It follows that important objects of the invention may be secured by the use of either the sliding lead carrier, or the fluted surface of one side of the magazine space which uted surface could beprovided in the barrel side of the space.

The provision of the sliding plate which carries the leads into position of ready access has a second important function. The plate presents a smooth surface to the interior of the barrel for rotation relative thereto, and the leads are carried in a chamber opposite surfaces of which are relatively stationary while the magazine and contents partake in the relative movement of the tube with respect to the barrel.

In forming the spaces for the magazine, it is preferred to leave the portions of the split tubev I6 at each side of the slot I1 and also a portion diametrically opposite the slot to be in the surface of a cylinder fitting in the outer shell or 3 barrel of the pencil, to preserve the centering of the split tube in the barrel.

Minor changes may be made in the physical embodiments of the invention within the scope of the appended claims without departing from the spirit of the invention.

I claim:

1. In a mechanical pencil of the type including relatively revoluble inner tube and outer barrel members: the material of at least one of said members cut away at the surface thereof partaking of motion of revolution relative to a surface of the remaining member, to provide magazine space for spare leads; and wedgingpreventative means in said space to prevent breakage of leads by relative rotation of said members. Y

2. In a mechanical pencil of the type including relatively revoluble inner tube and outer barrel members with their contiguous surface exposed for mutual Contact: the material of at least one of said members cut away to provide magazine space between the members for spare leads; and partition means forming an outer wall of the magazine space thus provided, to hold individual leads with their axes parallel with the axis of the pencil,

, 3. A magazine pencil comprising, in combination: an outer barrel member; an inner tubeV member formed with a longitudinal slot opening to its periphery; said members associated for relative rotation between contacting surfaces thereof; the surface of said inner member cut away circumferentially and longitudinally, beginning at lines spaced from said slot, to provide magazine space between the members; the surface of said tube member in the magazine space fluted to hold leads individually therein in alignment with the axis of the tube.

4. A magazine pencil comprising, in combination: an inner, longitudinally slotted tube member and an outer barrel member; the material of the outer surfaceof said tube cut away circumferentially and longitudinally beginning at lines spaced from the longitudinal slot thereof to provide lead-magazine space; a curved plate defining the outer side of said magazine space andlying closely adjacent the inner surface of the outer barrel; and means actuated by relative rotation of said members to control lead carried in said tube member.

5. The combination of -claim 4 wherein said plate is circumferentially stationary with respect to said tube member.

6. The combination of claim 4 in which said plate is formed with` an end ilange underlying leads when contained in the magazine and is longitudinally slidable to extract leads from the magazine.

7. A magazine pencil comprising, in combina-'- tion: an inner longitudinally slotted tube; an outer barrel formed with interior screw threads, thelcrests oi said threads exposed to contact with the surface of said inner tube; lead feeding and control means in said tube actuated by relative rotation of said tube and barrel; the surface of said tube, departing from a cylindrical form at portions spaced from its slot to provide lead magazine space between the tube and barrel; and means to preserve a substantially coaxial relation between the tube and barrel.

8. The combination of claim 7 in which diametrically opposite portions of said tube, at least one thereof being'closely adjacent its slot, are formed on arcs of a cylinder and serve as means to preserve coaxial relation. 1

9. The combination of claim 7 in which the magazine space is outwardly enclosedl by a plate formed onV an arc of a cylinder and serves to at least assist in preserving the coaxial relation.

10. A magazine mechanical pencil comprising, in combination: an interiorly threaded barrel; a cap revolubly associated with said barrel having a closure overlying the end of the barrel and formed with an opening; a split tube revoluble in said barrel and formed with a recessed magazine space in its periphery; a portion of said tube forming a wall of said space projecting through but not lling said opening whereby to force revolution of said tube when said cap Vis revolved and to provide access t0 said magazine space.

BLANCHARD D. SMITH.

' REFERENCES CITED The following references are of record inthe file of this patent:

UNITED STATES PATENTS

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