US2176050A - Pencil - Google Patents

Description

Oct. 17, 1939. E BAILEY 2,176,050

PENCIL Filed June 15, 1938 2 Sheets-Sheet 1 By: 2am

M M m- A iiomeys In venior R. E. BAILEY ocg. 17, 1939.

PENCIL 2 Sheets-Sheet 2 Filed June 13, 1938 Attorneys Patented Oct. 17, 1939 UNi'lED stares PATENT GFFIQE 3 Claims.

This invention relates to the class of stationery, and more particularly to pencils.

The invention has particular reference to that class of pencils known as mechanical pencils and an object of the invention is to provide a pencil of this character characterized by simplicity of construction and operation.

The pencil embodying the features of the present invention, together with its advantages, and the object of the invention will all be best understood from a study of the following description taken in connection with the accompanying drawings wherein:

Figure 1 is an elevational View of the pencil,

Figure 2 is a view somewhat similar to Figure l but with parts broken away and shown in section to illustrate certain details hereinafter more fully referred to,

Figure 3 is a fragmentary longitudinal sectional View through the pencil at the point end of the pencil,

Figures 4 and 5 are transverse sectional views taken substantially on the lines 44 and 5-5 respectively of Figure 2, v

Figure 6 is an elevational view of a plunger rod, and

Figure 7 is a perspective view of the lead pieces.

Referring to the drawings by reference numerals it will be seen that in the preferred embodiment thereof the improved pencil comprises a cylindrical barrel 5 which at one end is provided with an axial socket 6 which snugly receives a tubular extension I provided on one end with a barrel section 8. Barrel section 8 forms a continuation of the barrel 5 and has a tapered intermediate portion 9 merging into a substantially cylindrical free end I0.

The barrel section 5 constitutes a magazine for the pencil and is provided with a circular series of longitudinal lead-accommodating chambers II which receive and accommodate pieces of lead 12 which at one end are sharpened to points I3. The lead pieces I2 are arranged in the chambers II as shown so as to feed suc cessively from each chamber into a receiving chamber I4 provided therefor in the barrel section 8, and with which the chambers II are caused to successively align by rotating barrel section 5 about the extension 'I as an axis relative to the barrel section 8.

Barrel section 5 is provided with an axial bore I 5 that is in alignment with an axial bore I6 that extends through the barrel section 8 from the end I0 of the section through the extension 1 of said section.

Aligned bores 6 and I5 slidably accommodate a plunger rod I! which at one end is diametrically enlarged as at I8 and fits within a counter bore I9 provided therefor in the barrel section 5.

The enlarged end I8 of plunger I1 merges into an integral cap 20 for the upper end of the barrel 5. Cap 20 is provided-with a socket or otherwise as at 2I for accommodating an eraser 22. It will thus be seen that cap 20 serves to close the upper ends of the lead chambers II.

As clearly shown in Figure 2 the lead-receiving chamber I3 inwardly from the end I0 of barrel section 8 opens into the bore 5 of said section whereby to permit a lead piece I2 to pass from the chamber I4 into the bore 6 at the end IU of the barrel section 8. Normally, rod I serves to close communication between chamber 4 and bore 6 as also shown in Figure 2.

From the above it will be seen that to replace the lead in the end E0 of the pencil rod I1 is pulled outwardly longitudinally of the barrel sections 5 and 6 toward the right in Figure 2 so that the rod I! will clear the inner end of the bore I4 permitting the foremost lead piece I2 to pass from the bore of chamber I4 into the bore 6 to align with the rod II. Rod I1 is then pushed in a reverse direction or toward the end I0 of the pencil to force the lead piece received into the bore 6 into engagement with the lead to be displaced, forcing such lead from the end I0 of the pencil, and causing the second lead to have its pointed end I3 projected beyond the end In of the pencil for use.

Manifestly as one chamber I I empties, barrel 5 is rotated relative to barrel section 8 to bring the next successive chamber II into alignment with the chamber I l so that the lead in the second chamber will then feed successively to the chamber It to in time be used.

Normally a clearance is maintained between the meeting ends of the barrel sections 5 and 8 and the meeting ends of the barrel section 5 and cap 20, so that one, in an obvious manner, may readily determine whether or not all of the lead in the barrel 5 has been used.

It is thought that a clear understanding of the construction, operation, utility and advantages of a pencil embodying the features of the present invention will be had without a more detailed description.

Having thus described the invention what is claimed as new is:

1. In a pencil of the character described, a pair of longitudinally aligned complemental barrel sections having an interfitting engagement at the meeting ends thereof in a manner to permit the barrel sections to be rotated relative to one another, one of said barrel sections having a diametrically reduced free end portion and adapted to accommodate in said end a writing lead, said one section being also provided with a feed chamber for accommodating lead to be fed to said end of said barrel section, and the other of said barrel sections constituting a magazine for the pencil and provided with a circular series of longitudinal lead-accommodating chambers adapted to be successively moved into alignment with the aforementioned feed chamber, said barrel sections having aligned axial bores, the bore of said one section communicating with the feed chamber therein, and a plunger rod slidably fitting in said bores and having an end arranged to engage a lead passing from the feed chamber into the bore of the first-named barrel section for forcing such lead to an operative position at the free end of the first-named barrel section.

2. In a pencil of the character described, a pair of longitudinally aligned complemental barrel sections having an interfitting engagement at the meeting ends thereof in a manner to permit the barrel sections to be rotated relative to one another, one of said barrel sections having a diametrically reduced free end portion and adapted to accommodate in said end a writing lead, said one section being also provided with a feed chamber for accommodating lead to be fed to said end of said barrel section, and the other of said barrel sections constituting a magazine for the pencil and provided with a circular series of longitudinal lead-accommodating chambers adapted to be successively moved into alignment with the aforementioned feed chamber, said barrel sections having aligned axial bores, the bore of said one section communicating with the feed chamber therein, and a plunger rod slidably fitting in said bores and having an end arranged to engage a lead passing from the feed chamber into the bore of the first-named barrel section for forcing such lead to an operative position at the free end of the first-named barrel section, the lead chambers in the second-named barrel section being opened at their ends, and a cap on one end of said plunger rod and serving as a closure for said chambers at the end of the second barrel section farthest remote from the first barrel section.

3. In a pencil of the character described, a pair of longitudinally aligned complemental barrel sections having an interfitting engagement at the meeting ends thereof in a manner to permit the barrel sections to be rotated relative to one another, one of said barrel sections having a diametrically reduced free end portion and adapted to accommodate in said end a writing lead, said one section being also provided with a feed chamher for accommodating lead to be fed to said end of said barrel section, and the other of said bar rel sections constituting a magazine for the pencil and provided with a circular series of longitudinal lead-accommodating chambers adapted to be successively moved into alignment with the aforementioned feed chamber, said barrel chambers having aligned axial bores and said feed chamber being inclined with respect to said bore and communicating at one end with an intermediate portion of the bore of said one barrel section and communicating selectively at its opposite end with the lead chambers of the other section, and a plunger rod slidably fitting in said bores and having an end arranged to engage a lead passing from the feed chamber into the bore of the first-named barrel section for forcing such lead to an operative position at the free end of the first-named barrel section, the lead chambers in the second-named barrel section being opened at their ends, and a cap on one end of said plunger rod and serving as a closure for said chambers at the end of the second barrel section farthest remote from the first barrel section.

RAYMOND E. BAILEY.

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