US1474519A - Pencil - Google Patents

Description

Nov. 20 1923.

1.. w. FABE ET AL PENCIL Filed April 20. 1921 NVENTORS: 9% 7% ATTbRNEY8..

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45 engage one end of said ejecting rod, whereb meme Nov. 2c, 1923."

umran stares LO'IHAB W. FABER, OF NEW YORK, AND WILLIAM ROBINSON, OE BROOKLYN, HEW

YORK, ASSIGNOBS '10 EBERHARD FABER IENCIL GOMPANY, A CORPORATION 01 new roan,

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Application filed April 20, 1921. 'Serial No. 462,882;

in the county of Kings and State of ew York, have invented new and useful Improvements-in Pencils, of which the following is a specification.

This invention relates to pencils of the type which comprise a casing to hold a length of lead at one end thereof and mechanism for ejecting or propelling said lead outwardly from said casin writing position as the lea wear s awayor becomes broken ofi.

The objects of the invention are to provide a pencil of the character described embodving novel features of construction for holding and guiding the lead in the casing; to provide improved means foryejecting or propelling the lead from the casing; to provide a pencil of this character includin a casing and a lead holding and guiding tube, and improved means for securing said lead holding tube in said casing; to thus provide a casing having a removable tip "connected to one end thereof, and a lead holding tube with means for frictionally and adjustably mounting said lead holding tube'in said tip; to se cure the lead holding'tube in said tip by means of a pair of complemental substantially cross-sectionally semi circular strips of yielding frictional material, such as wood,

applied to said tube from opposite sides thereof and frictionally forced into one end of said tip; to provide a casing formed of provided with a'lead two telescoping correspondingly threaded tubes or sleeves one end'of one of which is uiding passage, an ejecting rod being slida I mounted in said lead guiding passa e, and the other of said sleeves being provi ed with a plug intermediate its ends to frictionall and detachably firelatwe revolving of sald sleeves in one d1 into operative in which like numerals of reference indicate the same parts throughout the several views, 1

Figure 1; is a longitudihal sectional view through apencil constructed in accordance with our invention; I

Figure 2 is a side elevation of the pencil;

Figure 3 is a detached side elevation of the lead holding and gu' ding tube with the friction strips applied thereto; 4 v

Figure 4 is a detached side elevation of the barrel or casing of the pencil Figure 5 is a detached side elevation of the tip of the pencil;

Figure 6 is a similar viewof the ejecting rod actuating sleeve;

Figure 7 is a side elevation of the cap of the pencil which serves as a closure for the reserve lead chamber;

Figure 8 is a perspective view of the lead holding and guiding tube and the friction strips detached therefrom;

Figure 9 is a perspective view of the lead ejecting rod, and

Figure 10 is a perspective view of the lead holding tube, friction strips and the ejecting rod assembled.

has threads 2 rolled therein and extending i from oneend-thereof to a point adjacent to the opposite end. A tubulartip 3 has one end thereof threaded as at 4: and is ada ted to be screwed intoone'end of-the main arrel 1, the walls of said ti at the opposite end thereof tapering as in icated at 5. The tip 3 is adapted to receive a lead holding and guiding tube 6 which is of a diameter slightly greater than the openm vat the small end of the tip and has one en tapered as indicated at 7 and slit for a portion of its length as atS, said end being adapted to pass through the opening on the small end of the tip 3 as shown in Fig. 1.

, The lead holding tube 6 is frictionally and adjustably mounted in the tip 3, and when the tube is forced outwardly through the small end of the tip as indicated in Fig. 1,

the walls of the tip engaging the tapered and split end 7 of the tube forces the sameinto tight frictional engagement with the lead 9 which is slidably. mounted in the tube 6 so as to hold the lead against falling out of not not

the tube 6. For the purpose of mounting the lead holding tube 6 in the tip 3 we preferably form the tube with spaced projections on the exterior thereof and provide a pair of'complementalstrips 11 substantially semi-circular in cross-section and formed of a yielding frictional material, such for instance as wood, the said strips 11 being applied to the tube 6 from opposite sides thereof over the projections 10. The diameter of thestrips 11 is slightly greater than the internal diameter ofthe threaded end 1 of the tip 3, and the lead holding tube 6 and the strips 11. are forced into the threaded end a of the tip, the tight engagement of the strips with'the walls of the tip 3 causing the-projections 10 on the tube and the threads lon the tip to bite into the strips 11 and produce a tight frictional engagement of thestrips with the tube and the tip. For the purpose of ejecting or propelling the lead 9 out of the tube 6 into a writing position, We provide an ejecting rod 12 which is slidably mounted in the tube 6 and is adapted to be actuated by an actuating sleeve 13 threaded for a portion of its length correspondingly to the barrel 1 as indicated at 1 1 and telescdpically received within the end of said barrel opposite the tip 3. The sleeve 13 is formed at an intermediate point in its .length with an inwardly pressed rib 15 which serves as a stop for a ,plug or disk 16 mounted within the sleeve and adapted to engage the end of the'ejecting rod 12as shown in Fig. 1. It'will thus be seen that relative revolution of'the barrel 2 and the actuating sleeve 13 in one direction will cause relative longitudinal movement of said barrel and sleeve to slide the ejecting rod 12 in the. tube 6 and eject the lead 9 there from, the disk 16 in the actuating sleeve-13 frictionally engaging the end of the ejecting rod 12. The actuating sleeve 13 is prevented from being pulled out of the barrel 2 by engagement of the inner ends of the threaded portions of said barrel and sleeve or in other words the "en-.

gagement of the threaded portion 14 of the sleeve 13 with the "smooth or un- .threadedpor'tion at the end of -the (barrel 1. The portionjof. the actuating sleeve 13between the disk16 and the endof the sleeve opposite its threaded end le se'rves as a chamber to receive the plurality of reserve leads 90 as shown in Fig. 1, the said end of the said chamber being closed by a tubular plug 17 having in oneend thereof an eraser 18. In the ordinaryoperation of the pencil the actuating sleeve 13 is revolved until its threaded end 14 engages the smooth end of the barrel 2, as shown in Fig. 1, after which a-leadis inserted in the outer end of the lead holding tube 6 and pushed invm'dly so as to force the ejecting rod 12 2 held in one hand, the sleeve 13 is revolved with the thumb-and fingersof the other in a clock-wise direction which causes the same to move inwardly of the barrel. 2 to push, through the disk 16, the ejecting rod 12 through the, tube 6 and force the lead 9 outwardly of the said tube. If the lead becomes loose in the lead holding tube6 so that it falls out of thesame when held in a vertical position, it is'merely necessary to force the tube 6 and the friction strips 11 further into the tip 3 so as tocause a tighter engagement of the tapered end 7 of the tube 6 with the tapered portion 5 of the tip, which action causes the split end of the lead holding tube to tightly engage the lead 9.

@bviously, detail modifications and changes can be made in the construction of our pencil without departing from the spirit or scope of the invention, and therefore we do not desire to be understood as limiting ourselves except as required by the following claims when construed in the light of the prior art.

Having thus we claim is: v

l. A pencil including a tubular casing, a lead holding and guiding tube ofa size smaller than that of said casing to receive and guide a lead, and complemental strips of frictional material applied to opposite described the invention, what sides of said tube and frictionally engaging theinner walls of said casing to support and hold the tube against movement therein.

2. A pencil including a tubular casing, a lead holding and guiding tube of a size smaller than that of said casing to receive a lead, said tube having exterior projections thereon, and complemental strips of material applied to said'tube from opposite sides thereof and having an exterior diame-.

ter slightly greater than the internal diameter of said casing, said tube and stripsbeing forced into said casing and held byfrictional engagement, and means for propelling a lead through said tube.

1. A pencil including a pair of tubular telescoping sections having a threaded engagement whereby relative revolution thereof produces relativejlon itudinal movement of said se i ns, ne 9.. sa d secti ns haying a lead-guiding passage, an ejecting ted the other side of said plug serving as a slidably, mounted in said passage, a 'plug chamber to receive reserve leads, and a 010- fixedly arranged in the other of said secsure for said chamber.

tions intermediate the length thereof to fric- 5 tionally and detachably engage at one side thereof one end of said ejecting rod, the portion of said second-mentioned section at Witness:

LOTHAR W. FABER. WILLIAM ROBINSON.

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