US1511225A - Pencil - Google Patents

Description

l @et Mr i924 G. LARSEN PENCIL Filed May 17, 1922 Patented Oct. 14, 1924. y y UNITED STATES A 1,511,225 PATENT OFFICE.

GABRIEL LABS, 0F SPRINGFIELD, NEW JERSEY, ASSIGNOR T0 L. E. WATERMAN COMPANY, 0F YORK, N. Y.,

A CORPORATION 0F NEW YORK.

PENCIL.

Application nled May 17,

To all 'whom'it may concern.'

Be it known that I, GABRIEL LARsEN, a citizen of the United States, residing at Springfield, in the county of Union and State of New Jersey, have invented certain new and useful Im rovements in Pencils, of which the following is va specification.

My invention more particularly relates to a mechanical pencil comprising comparatively few parts which are easily assembled and which form a simple and cheap construction. p

Another object of my invention is a pencil of this character in which it lis not possible for the lead to jam and in which the parts do not get out of order. f

Other objects of my invention will appear in the specification and will be particularly pointed out in the claims.

My invention will best be understood by reference to the accompanying drawings, in which Fi re 1 is a longitudinal section, partially 1n elevation, taken through the axis of the referred form of pencil embodying my invention; Fig. 2 is a cross-section taken on the line 2-2 of Fig. 1; Fig. 3 is a fragmentary sectional view illustrating a slightly modified form-of my invention; Fig. 4 is a cross-sectional View, taken on the line 4 4 of Fig. 3; Figs. 5 and 6 are sectional views similar to Fig. 3, illustrating further modiications of my invention, Fig. 7 is a longitudinal section, partially in elevation, of a pencil made in accordance with my invention, and illustrating a novel form of magazine, and Fig. 8 is a plan View of the member which is rictionally held in position within the casing.

Like reference characters indicate like parts throughout the drawings.

Referring, now, to the drawin s, and first to Figs. 1 and 2, the pencil s own comprises a barrel or outer casing 10, preferably formed of rubber or the like, though obviously it may be formed of metal or other material, and internally threaded at 11 for at least a portion of its length. A member 12 is adapted to be retained within the barrel 10, and preferably at an intermediate point thereof. In the form of my invention illustrated in Fig. 1, the member 12 is threaded to engage the screw threads 11 of the barrel 10, the member being so formed with reference to the barrel that the frictional engagement between the two is suiicient to 1922. Serial No. 561,813.

prevent the member turning relatively to the barrel when the lead is ed forwardly in a manner which will now be described. A carrier 13 is received within the barrel 10 and is swivelled to the member 12, preferably by a stem 14, which, in the form shown in Fig. 1, is inte ral withy the carrier 13 and which passes t rough an opening 15 in the member 12. The end of the stem 14 is provided with a head, as at 16, a washer 17 preferably being interposed between the head 16 of the stem and the member 12. The carrier 13 is preferably rotated relatively to the barrel 10 by a tip or nose 18, preferably conical in form, as shown,.engag1ng, in its assemble-d position, the end of the barrel 10 and secured to the carrier 13 (it being understood that in practice the nose is usually held by one hand while the barrel is rotated with the other). Preferably the tip 18 is provided with a recess 19, in which a contracted part 20 'of the carrier forms 'a tight fit.

\ In the pencil illustrated, the carrier forms a guide on the propelling member, and in the form illustrated, the carrier 13 is provided with a transverse slot 21 extending the major portion of the carrier and adapted to receive the head 22 of a propelling member, indicated generally at 23, the propelling member also comprising a stem 24 extending downwardly from the head 22 and received in an axial opening 25 in the lower end of the carrier. Thehead 22 is screw threaded, as at 26, to engage the screw threads of thc barrel 10. The upper end of-the barrel is preferably closed by a cap 27, which is preferably provided with a screw-threaded contracted portion 28 engaging screw threads 29 formed in the upper part of the barrel 10. The upper portion of -the barrel forms a convenient magazine for leads, the member 12 forming the lower wallof the magazine;

To assemble the parts, the tip 18 is secured to the carrier 13 and the propelling member placed in position within the carrier, with the stem 24 in the opening 25 of the carrier and the head 26 located in the slot thereof. The member 12 is then screwed into the barrel, the same preferably being provided with notches or openings (not shown) which may be engaged by an appropriate tool inserted from the too of the barrel, until the tip 18 engages the lower end of the barrel. I The yhead 22 of the propeller 'is screwed into the barrel by turning the tip 18 and the carrier attached thereto. By

providing both the member 12 and the cross head 22 with screw threads of the same pitch which engage the same screw threads of the casing or barrel 10, the parts are readily assembled with the tip 18 engaging the end of the barrel 10, and any subsequent separation between the tip and the barrel may readily be corrected by4 adjusting the position of the member 12.

To operate the pencil, assuming that there is no lead in the pencil, the tip 18 is rotated in a direction to run the head 22v of the propeller to the rear of the slot 21. A lead 30 is then inserted through the tip and against the stem 24 of the propeller.

' Then, by rotating the barrel 10 relatively to the tip 18, which may be held by one hand, the propeller, and with it the lead, is moved forwardly, as desired, the ti 18, which is preferably formed of rubber, orming an easy bearing for the lead, which fric! tionally retains the same in position.

The upper part of the barrel 10 preferably forms a magazine for the leads, the wall of the bottom of the magazine being formed by the member 12 and the top bein closed by the cap 27.

In the form of my invention illustrated in Figs. 3 and 4, the retaining member consists of a split collar 12a, tol which the carrier is swivelled in the same manner illustrated in Fig. 1. The split ring, which has a tendency to expand to a diameter greater than the internal diameter of the barrel, is forced into the barrel (with the carrier) by a straight longitudinal movement, and its tendency to expand retains the same in position, with the tip of the pencil against the end of the barrel.

In the form of my invention illustrated in Fig. 5, the member 12b' is integral with the barrel 10. A screw 14h passes through the opening in the member 12b and the screw-threaded end thereof is received in a screw-threaded opening in the end of the carrier, as illustrated.

In Fig. 6, the member 12b is also formed integral with the barrel. The carrier 13, however, is swivelled to the member 121 byV a connecting member 14c having the head engagingabove the member 12b and having a split stem 31, the ends of which are enlarged, as at 32, `and engaging an opening 33 in the end of the carrier 13.

This arrangement has the advantage that member sociated parts are the same as those shown in Fig. 1 and need not further be described. ''he magazine in this form of my invention comprises a casing 34 which may be attached to the cap 27, as by a screw 35, which is preferably permanently attached to the magazine. The casing 34 is cut away at one side, as at 36, to provide an opening through which the magazine may be charged, and which, at the same time, furnishes readyv access to the upper ends of the leads, particularly when the magazine is inclined, for the removal of the leads. To obtain a new lead, it is only necessary to withdraw the cap 27 and the attached magazine 35 and a lead can be taken from the side of the magazine.

One of the important features of this form of magazine is that the same may be sold se arately as a refill. For this purpose, t e magazine, with the screw 35 secured thereto, would be sold filled with leads, and the user, instead of being subjected to the usual annoyance in recharging his pencil with leads, would purchase a new filled magazine, and it would only be necessary for him to throw away the old magazine 34, and attach the new magazine 34 to the cap 27 by the screw 35.

What I claim and desire to secure by Letv 1 ly screw-threaded throughout the lower portion of its length, a screw-threaded adapted to engage the screw threads of said casing and to be frictionally retained'I in position therein, a carrier swivelled to said member, a nose through Whichthe lead is propelled secured to said carrier, whereby rotation of said nose effects rotation of said carrier, and a propelling member guided by and rotatable with said carrier and comprising a screwthreaded part adapted to engage the screw threads of said casing.

2. In a pencil, an outer casing internally screw-threaded throughout the lower portion of its length, a screw-threaded member adapted to engage the screw threads of said casing and to be frictionally retained in' position therein, a carrier swivelled to said member, a nose through which the lead is propelled secured to said carrier, whereby rotation of said nose effects rotation of said carrier, and a propelling member guided by and rotatable with said carrier and comprising a screw threaded part adapted to engage the screw threads of said casing, said 'member being provide-d with mea-ns, whereby a tool may operatively engage said member to turn the same and thereby remove said member and carrier through the nose end of the pencil.

- GABRIEL LARSEN.

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