US1426131A - Magazine pencil - Google Patents

Description

J. H. WARING,

MAGAZINE PENCIL.

APPLICATION FILED JUNE 17. 921.

Patented Aug. 15, 1922 J) v eJ w James I-LWaring 9% all/lg 03/125 Ill: rllllilli ll!!! ll! Iran lililllirllran-r OFFICE.

JAMES H. WARING, 0 MILWAUKEE, WISCONSIN, ASSIGNOR 0F ONE-HALF TQ PAUL F, SCHRYER, 0F WAUWATOSA, WISCONSIN,

MAGAZINE PENCIL.

Application filed June 17, 1921.

To all whom it Hay concern:

Be it known that I, JAMES H. VVARING, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Magazlne Pencils; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention refers to-magazine pencils such as disclosed in my application for patent filed February 28, 1921, Serial #44 8318.

The primary object of my present invention is to provide a pencil of the above general type, wherein a metallic follower mandrel is under a two way clutch control and is adapted to abuttingly engage and feed short sections of lead, which sections are thereby not subjected to clutching control that would tend to mar or break the same. Thus the feed of the lead, irrespective of its density, is positive.

Another object of my invention is to provide a metallic follower mandrel for maintaining control and feeding the sections of lead, irrespective of their length, down to a minute end, whereby economy in the lead is effective, it being understood that said lead is frictionally gripped at the point of the pencil to prevent droppingout by gravity.

Another object of my invention is to provide a tubular construction wherein the parts can be readily manufactured and assembled at a minimum cost, and wherein the liability of the movable elements to wear or become disarranged through usage, is eliminated.

lVith the above and other objects in view, the invention consists of certain peculiarities of construction and combination of parts as are hereinafter set forth with reference to the accompanying drawings and subsequently claimed.

In the drawings,

Figure 1 represents a sectional elevation of a pencil, embodying the features of my invention, parts being broken away, and other parts in full to moreclearly illustrate the details of construction.

Figure 2, a cross section of the same, the section being upon an enlarged scale, the section being indicated by 2-2 of Figure 1. and

Figure 3, another cross sectional view,

particularly showing the clutch elements, the

. Specification of Letters Patent.

Patented Aug. 15, 1922.

Serial m. 478,256.

section being indicated by ure 1.

Referring by characters to the drawings, 1 represents a jacket, the lower end of which is tapered, and is formed with a lead discharge nozzle 1. Mounted in the lower end of the shell is a lead receiving magazine tube 2, the lower end of which is open and split a predetermined distance to form gripping tongues 2', which enga e a section of lead q. and thus prevent t e same from dropping out through the nozzle 1 by gravlty, it being understood that the split tongue sections at their ends are seated in a shoulder formed in the bore of the nozzle, whereby the magazine tube is held against end play in one direction, the split tongue being izonzracted about the body of the section of ca a.

line3-3 of F ig- The receiving mouth of the magazine tube mounted above the ring is a conically cup' ped clutch collar 6, which cupped clutch collar, in conjunction with the retaining ring 5. serves as a housing for a series of clutch balls 7, the same being normally forced inwardly by engagement with the conical walls of the collar 6. This structure constitutes a friction clutch, wherein the group of balls bitingly grip a matallic follower mandrel 8, which mandrel is aligned with and adapted to abut the upper end of section lead (1, whereby said lead is fed downwardly through the magazine tube from time to time, as the projected point, thereof, becomes shortened through wear or breakage.

The housing 4 at its upper end is also flanged inwardly to limit upward movement of a reciprocative conical cupped clutch collar 6. The clutch collar 6 functions in connection with the second series of gripping balls 7, which gripping balls are normally held in biting engagement with the follower 8 by a retaining ring 5, there being a coil spring 4 interposed between said retaining clutch collar is forced downwardly, and the retaining ring 5' is forced upwardly to thus place the two sets of clutch balls under spring control. The lower set of clutch balls 7, and their associated parts, comprise what might be termed a locking clutch for the mandrel, and the upper clutch balls 7 may be termed a feeding clutch mechanism for said mandrel, these separate clutch elements being practically duplicates. The clutch collar 6, however, is. secured to, or constitutes a part of a reciprocative hollow plunger 9, which plunger extends upwardly to a point near the end of the jacket 1, and incidentally serves as a guide for the metallic follower mandrel 8. The hollow plunger 9 is arranged to be manually actuated in a downward direction in opposition to pressure of the coil spring 4' through the feed clutch elements. Manual control ofthe hollow plunger is effected through engagement of a cross pin 10, which cross pin extends through slots 10 that are formed in the walls of a jacket cap 12, the said pin being secured to a reciprocative exteriorly knurled sleeve 11, that is mounted upon the outer wall of the cap. The jacket cap is arranged to be detachably connected with the upper open end of the jacket 1, by threaded engagement therewith, as best shown in Figure 1, and the upper end of the jacket cap has fitted therein, an eraser rubber 13, whichincidentally forms a top closure for the cap.

In order to provide a guide for the reciprocative hollow plunger, I have, in this exemplification of my invention, shown a thimble 14, which thimble is removably fitted in the upper portion of the jacket 1, and its central bore, thereby, serves to center and guide the upper end of the plunger 9. The annular-walls of the thimble may be provided with a series of longitudinal grooves 14', as .best shown in Figure 2,

which grooves serve as pockets for a series of sticks or sections of lead a", whereby a sufficient supply may be carried with the pencil for indefinite use.

From the foregoing description, it is apparent that the lead sections in the magazine tube, have no connection with the feed mechanism,w hich feed mechanism is located above. Hence when it is desired to feed the lead, the operator reciprocates the sleeve 11, whereby the plunger and its associated clutch collar 6' will move downwardly, causingthe gripping balls 7 to bite and frictionally grip the metallic mandrel, whereby it will be positively fed downward, and, due to its abutting engagement with .the upper end of the lead, said lead will be forced outwardly through the nozzle 1- a predetermined distance. When manual pressure is relieved from the sleeve 11, the hollow plunger 9 and clutch causes the mandrel to move downward step by step with each manual impulse of the sleeve 11, and after each downward feed movement of the metallic mandrel, the looking clutch will function, whereby its gri ping balls will frictionally bite .against tl fe surface of the mandrel and prevent retraction thereof, in opposition to its forced feed.

Thus the mandrel will be fed by one clutch mechanism, and the travel of it will be maintained, due to the grip of the locking clutch elements.

Obviously when the mandrel is fed downwardly, the locking clutch elements will permit the longitudinal movement, while a reverse tendency in the travel of the mandrel will be opposed by the grip of the balls 7. It is also manifest that, owing to the distinct separation of the feed mechanism from the lead sections, that said lead sections can be utilized down to -a minute end and the strength or density of the lead is thus.immaterial to proper functioning of the feed mechanism.

While I have shown and described minutely the structural features, as exemplified in the drawings, it is understood that I may vary such structural features within the scope of the appended claims, as they will be hereinafter interpreted by those skilled in the art of mechanics.

I claim:

In a magazine pencil, the combination of a hollow plunger, means for reciprocating said plunger, a housing, a clutch collar rigidly secured to said plunger and reciprocable in said housing at one end thereof, a retaini'ng ring secured to said housing at the other end, a second clutch collar slidably positioned in said housing adjacent said retaining ring, a plurality of balls interposed between said second collar and said retaining ring, a second retaining ring, a spring interposed between said second clutch collar and second retaining ring, a plurality of balls interposed between said second retaining ring and first mentioned clutch collar, and a mandrel extendingthrough said hollow plunger,

Wisconsin. JAMES H. WARING;

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