US1410666A - Pencil - Google Patents

Description

IAIIUIGGGD H/ FISCHER. PENCIL. APPLICATION FILED APR. I9, I92].

Patented Mar. 28, 1922.

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Specification of Letters Patent.

Application filed April 19, 1921. Serial No. 462,508.

To all whom it may concern:

Be it known that I, JOHN H. FISCHER, a citizen of the United States of America,residin at New York city, county and State of ew York, have invented certain new and useful Improvements in Pencils, of which the following is a full, clear, and exact description. I

at are commonly known as mechanical pencils from' the fact that they are pro- .vided with means for feeding lead to and through the point and renewing such leads when used, have heretofore been designed and made in a very great number of forms, but in practically all instances the object of the designer has beento improve and incidentally to simplify the mechanical parts without attempting to change the general character of the device as a whole. In other words, it has generally been assumed that these pencils belonged to a class in themselves and could not bemade and sold for a price which, for what is known. as an ordinary pencil, would be prohibitive.

The construction of a mechanical pencil in such manner and form that it maybe made and sold at a price reasonably within that for which ordinary pencils may be purchased, is the problem that I have sought to solve and this I have succeeded in accomplishing by the construction and design of the pencil herein shown and described.

' The improvements-which I have made and which enable me .to produce such a pencil as is herein contemplated, consist in making the body of the pencil ca'se'entirely of wood, painted or otherwise ornamented like an ordinary pencil. This case is provided at its front end with a metal cap of conical form through which projects the lead guide tube entering and secured in the bore of the wooden case, and at its rear end with a metal cylinder, to which the means for advancing the leads and carrying an eraser are secured. These parts are designed and constructed in the simplest and cheapest possible manner so that the pencil as a whole may be made and sold at a very low cost although it has all the properties and capabilities of those of more expensive and elaborate design, except that it is usually not provided, as most of these pencils are, with an interlor lead magazine, although this might be added.

My improved pencil is. illustrated in the accompanying drawing, in which:

Figure 1 is a view in elevation of the complete device.

Figure 2 is a longitudinal central section of the same.

Fig, 3 is a cross section on line 33 of Fig. 2.

Fig. 4 is a cross section on line H of Fig. 2; and,

Fig. 5 is a view of the upper end of the case with the lead-feeding parts removed.

The main pencil case 1 is entirely of wood. Usually this is made in two parts which are subsequently glued together, and have grooves which form a circular bore throughout the entire case, and an additional and deeper groove 2 in one or both parts which extends down to a proper distance from the tip or point.

The rear end of the Wooden case is fitted with a cylindrical sleeve 3 which is secured to the case by an indentation 12 or by threads impressed therein after it is put in place. Fitting down over this sleeve is an outer sleeve or tube 4, which may be attached by any usual form or joint or by threads. impressed therein which engage with those in the inner sleeve, and to said outer tube is rotatably secured an inner tube 5 with a contracted extension 6, and which carries at its outer end a rubber eraser 7 The tube 5 turns freely within the sleeve 4 to which it is rotatably secured by an impressed groove or grooves, as shown.

To the extension 6 is secured the end of a spiral wire 8 in any simple and convenient manner, and within this Wire is a lead follower wire 9 with a projecting or bent portion 13 that engages with the spirals and enters the groove 2. When this spiral with the follower wire is introduced into the bore of the case 1, in the manner indicated, the turning of the tube 5 advances or retracts the follower wire to feed the lead.

Into the bore of the case 1 is inserted a lead guide tube 10'which extends down to the end of a conical cap 11, which is secured to the forward end of the case. This tip and inner tube may be split in one or more places for the fractional part of an inch in order to have a friction fit with the lead.

This pencil is filled by removing the Patented Mar. as, 1922. i

sleeve 4, withdrawing the spiral after re tracting the follower wire 9, and dropping a lead down into the tube 10. The sleeve 4 is then replaced and the eraser tube turned to feed the lead for the desired distance the various parts is required. The pencil is reduced to its simplest possible form and is a very serviceable and extremely cheap device to manufacture.

\Vhat I claim is A mechanical pencil comprising in combinntion a case composed entirely of wood with a central bore and a side groove extending along a portion of the same, a fixed metal sleeve secured to and extending beyond the rear end of the case, a rotatable metal sleeve within and engaging with the fixed sleeve having a. tubular extension projecting down into the bore of the case, a spiral connected to said tubular extension and adapted to be rotated thereby, a follower wire within the spiral and having a projection engaging therewith and entering the said groove, a lead tube secured to the case and entering the bore of the same at the forward end, and a conical metal cap secured over the same and to the forward end of said case..

In testimony whereof I hereto aflix my signature. JOHN H. FISCHER.

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