US2747548A

US2747548A - Attachment for lead pencils

Info

Publication number: US2747548A
Application number: US309443A
Authority: US
Inventors: Platzke Emil
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-09-13
Filing date: 1952-09-13
Publication date: 1956-05-29
Anticipated expiration: 1973-05-29

Description

y 9, 1956 E. PLATZKE ATTACHMENT FOR LEAD PENCIL-S Filed Sept. 15, 1952 FIG. 6

u ai w mm INVENTOR. EMIL PLATZKE BY ATTORNEY v surv- Kw:

United States My present invention relates to novel attachments for lead pencils, and particularly to improvements in pencil sharpeners, pencil erasers and pencil clips.

An object of my invention is to provide a novel eraser, tubular in form and which is placed longitudinally over the writing point of a pencil to facilitate erasures at the point of writing. Said eraser is formed as an integral part of a latch-controlled coiled spring adjustable and operable, by a touch of the finger upon said latch, to release the spring from compression and project the eraser downwardly and over the pointed lead in a convenient position for making erasures. Compression of the spring after use of the eraser by an upward push on said eraser automatically locks the eraser in such position by means of the finger-controlled latch. In addition to providing means for erasure at the point of writing, the coiled spring provides and assures the writer of a firm grip on the pencil and also, when the pencil is not in use, the spring may be released from compression by a touch of the fingercontrolled latch, thereby projecting said eraser over the pointed lead and thereby protecting the same from breakage when not in use.

Another object of the invention is to provide a novel pencil sharpener and eraser combination designed to be attached, preferably, when not in use, to the upper end portion of a pencil, said unit being tubular in shape and fitted with both pencil and ink erasers. In addition to providing both a pencil sharpener of the conventional type and the erasers as described, this combination also affords additional pencil length when said pencil has been shortened to inadequate length by continued sharpening.

A still further object of my invention, described as a modification herein, is the provision of a combined eraser and pencil clip applicable to either end of a pencil which provides again for an eraser at the point of writing by adjustment of the eraser clip combination longitudinally on the pencil, which may be left in such position for purpose of erasure or point protector or moved to an inoperable position insofar as the aforesaid functions are concerned and the same used merely as a pocket clip.

To the above end, generally stated, the invention consists of the novel devices and combination of devices hereinafter described and defined in the claim.

In the accompanying drawing which illustrates the several forms of the invention, like characters indicate like parts throughout the several views.

Referring to the drawing:

Fig. 1 is an elevational view of a combined eraser and pencil point protector applied to the pointed end portion of a lead pencil;

Fig. 2 is a view partly in end elevation and partly in section taken on the line 2-2 of Fig. 1;

Fig. 3 is a fragmentary view showing the eraser held in a retracted position to uncover the pointed end portion of the pencil;

Fig. 4 is a fragmentary elevational view of a combined pencil sharpener and eraser applied to one end portion of a pencil;

atent O Fig. 5 is an end view of the invention shown in Fig. 4;

Fig. 6 is an elevational view of an eraser and clip applied to one end portion of a fragment of a pencil; and

Fig. 7 is a view of the upper end of the invention shown in Fig. 6.

Referring first to the invention shown in Figs. 1, 2 and 3: The numeral 8 indicates a conventional lead pencil having a pointed end portion 9. A tubular eraser 10 is telescoped onto the outer end portion of a tube 11 and secured thereto. This tube 11 is telescoped onto the pointed end portion of the pencil 8 for free sliding move ment longitudinally thereof. The tube 11 and hence the eraser 10 is attached to a longitudinally divided spring clip 12 by a coiled spring 13 encircling the tube 11 and the pencil 8 and secured to the clip 12. The clip 12 encircles the pencil 8 and is frictionally held where positioned on said pencil.

When the spring 13 is extended, it holds the eraser 10 over the pointed lead of the pencil. A latch 14, springconnected to the clip 12, is provided for holding the spring 13 retracted by engaging one of the convolutions of said spring, see Fig. 3.

The purpose of this attachment is fiilly set forth in the objects of the invention.

Referring now in detail to the invention shown in Figs. 4 and 5, the numeral 15 indicates a pencil sharpener having secured at each end a tube 16. As shown, one end portion of a lead pencil 17 is inserted into one of the tubes 16 and frictionally held. A tubular eraser 18 is telescoped onto each tube 16 and secured thereto. One of the erasers is for pencil erasure and the other for ink erasure.

The purpose of this invention is fully set forth in the objects of the invention.

The invention shown in Figs. 6 and 7 includes a tubular erasure 19 telescoped onto one end portion of a tube 20 and secured, and which tube, as shown, is telescoped onto one end portion of a pencil 21 and frictionally held. A clip 22 is spring-connected to the tube 20 and operable to secure the pencil in a pocket.

The purpose of this attachment is also fully set forth in the objects of the invention.

While there are herein disclosed but a limited number of embodiments of the structure, process and product of the invention herein presented, it is possible to produce still other embodiments without departing from the inven tive concept herein disclosed, and it is desired, therefore, that only such limitations be imposed on the appended claim as are stated herein, or required by the prior art.

What I claim is:

in a pencil attachment, a tubular eraser, a tube, one end portion of which is telescoped into the eraser and secured thereto, said tube being movable from a retracted to a projected position, a clip, a spring connecting the tube and the clip, and a latch attached to the clip and engageable with one of the convolutions of the spring for holding the spring retracted, said clip being applicable to a pencil in a fixed position with the eraser, the tube and the spring encircling the pencil.

See

References Cited in the file of this patent UNITED STATES PATENTS 426,950 Negraval Apr. 29, 1890 1,121,318 Allen Dec. 15, 1914 1,339,707 Lazarides May 10, 1920 1,432,993 Garner Oct. 24, 1922 1,569,742 Goerling June 12, 1926 2,057,792 Sakai Oct. 20, 1936 FOREIGN PATENTS 530,082 Great Britain Dec. 4, 1940