US2132633A - Lead pencil construction - Google Patents

Description

Oct. 11, 193:3. c. KOSTA 2,132,633

LEAD PENC IL CONSTRUCTION Filed May 5. 1935 J7 INVENTOR Charles hasza ATTORN EY Patented Oct. 11, 1938- PATENT OFFICE LEAD PENCIL CONSTRUCTION Charles Kosta, New York, N. Y. Application May 3, 1935, Serial No. 19,544

1 Claim.

This invention relates to writing instruments and more particularly is directed to an improvement in refillable lead-pencil construction.

Among the objects of the invention is to improve lead-pencil constructions whereby few and simple parts are assembled to provide a neat appearing, conveniently proportioned writing instrument which shall be cheap to manufacture, and which shall be practical and eflicient to a high degree in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the constructions hereinafter described and of which the scope of application will be indicated in the following claim.

In the accompanying drawing, in which is shown various possible illustrative embodiments of this invention,

Figure 1 is a front elevational view of a leadpencil construction embodying the invention;

Figure 2 is a fragmentary cross sectional View taken on line 2-2 in Figure 1;

Figures 3 and 4 are cross sectional views taken on lines 33 and I-4, respectively, in Figure 2, and

Figure 5 is a perspective view of the lead pusher.

Referring in detail to the drawing, I0 denotes a lead-pencil construction embodying the inventionwhich is seen to comprise an elongated body or holder II, preferably made of wood or other suitable material of polyangular or circular cross sectional shape, a length of graphite, commonly called the lead I2 mounted for sliding movement through an axial bore Ila, the lead being positioned as a longitudinally extending core in said body I I.

The holder II may terminate at its leading end III) in a tapered section, and if desired a reenforcing band I3 may be provided and located inwardly of said end section I Ib. At the end of said holder I I opposite said end section I lb, a ferrule or other suitable thimble receptacle I4 is secured for retaining a rubber eraser I5, as shown in Figures l and 2.

Extending substantially the entire length of body I I from the band I3 to the ferrule I4, there is provided a thin straight slot I6 which communicates with bore Ila. Mounted to slide with said bore Ila rearward of the lead I2 there is a pusher member I'I having a thin neck or shank I8 extending from one end thereof which passes through the slot I6, said shank I8 being terminated at the exterior of the body II by an enlarged head or knob I9.

Said member II, shank I8 and head I9 are preferably made of a single piece of metal and are adapted to abut the end of the lead I2 thus serving as a feeding means for projecting the latter through the body II as the lead end I2a exposed beyond the end section I6 is used up in writing. A tightly fitting ring 20 is mounted on the exterior of the body for sliding movement therealong, said ring 20 serving as an adjustable stop for retaining said lead feeding means from being displaced while using the pencil II]. In order to facilitate the positioning of the ring 20 along the body II, a rim ridge or outturned flange 20a is provided on said ring 20 which gives a convenient finger or nail grip means.

The pusher member I! is preferably made sufficiently long, that is, the end Ila thereof is spaced from the shank I8, a distance which will propel the rear end of the lead I2b just short of the end section I6 of the body, thereby permitting practically the entire lead I2 to be available for use.

The utility of the improved lead-pencil construction will now be apparent. After constructing and assembling the pencil parts, as shown in the drawing, the pencil I8 may be used in the well understood manner. As the lead end I2a is worn down the knob I8 is pushed toward the leading end Iila which causes the member I! toeject or propel the lead I2 out of the holder II, until the desired length I2a thereof is exposed. The ring 20 is then moved until it abuts the knob I9 by means of contact made with the flange 28a, said knob I9 preferably being made wider than the width of the slot I6. In this position said lead feeding means and the lead I2 are retained against any tendency to back up into the holder I By making the lead feeding means a single metal part, the shank I8 may be made relatively thin yet sufficiently strong to function satisfactorily and the slot I6 may be made correspondingly narrow to eliminate the possibility of foreign matter entering and clogging the movable parts of the pencil.

The proportion of the pencil body and parts constructed as above described and shown in the drawing form a well balanced writing means which is neat and attractive in appearance and convenient to handle.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved and which are well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes tending lengthwise thereof and terminating short a of said tapered end, a one-piece non-resilient lead feeding means having a pusher member adapted to slide in said axial bore, said member being substantially the diameter of said lead, a relatively thin shank extending from said member and integrally formed therewith adapted to move in said slot, a knob of greater Width than the shank integrally formed with and terminating the latter outside the body, said member having a length short of the distance between said terminal end of the slot and the tapered end of the pencil, and an adjustable ring slidably mounted on said body independent of said member adapted to be positioned in the path of movement of said knob to serve as an abutment stop.

CHARLES KOSTA.

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