US2638074A - Mechanical pencil with spiral feeding means - Google Patents

Description

May 12, 1953 H. s. HAssELQulsT l 2,638,074

` MECHANICAL PENCIL WITH SPIRAL FEEDING MEANS Filed Sept. 5, 1948 2 Sheets-Sheet l NIU VEEL May 12, 1953 H. s. .HAssELQUlsT 2,638,074

MECHANICAL PENCIL WITH SPIRAI.. FEEDING MEANS Filed Sept. 5, 1948 2 Sheets-Sheet 2 Patented May l2, 1953 MEcnANIeAnPENcitvvrrit sentar. FEEDING MEANS Hugo Si Hassel'qust, Oak larli, lili, assigner to Joseph Divian` Crucible Company, J ersey Gtv; N. J., a corporation oil New Jersey Appiication September 3, lil/i3, Serial No. 47,61i)

1 Claim. 1

This invention relates to mechanical pencils with spiral feeding means;

@ne object of the invention isf to provide a pencil ot the character described having novel and efiicient means for supporting. and frictionally engaging and gripping the lead in the tip in a manner to prevent it from. falling out.

Another object of theinvention` is to provide a pencil of the characterdescribed having the barrel, spiral, tip and. lead guidev and support so assembled and mounted that they will be maintained .in correct alinement and will be effectively held in the proper assembled relation with reference to each other.

Further objects of the invention will. appear from the following specification taken in connection with the drawings which form a part of this application, yand in which:

Fig. l. is a longitudinal sectional elevation of a mechanical pencil constructed in accordance with the invention, the lead feeding member being .shown in this view in its extreme position of retraction;

Fig. 2 is a longitudinal sectional elevation similar to Fig. l but showing the lead feeding member in operative position. feeding the lead;

Fig. 3 is an enlarged elevational View of the lead guiding and gripping member inserted in the pencil tip;

Figs. 4, 5 and 6 are respectively transversel sectional elevations, on an enlarged scale, taken substantially on lines l-i, 5 5 and 5 6 of Fig. 2, locking in the direction of the arrows;

'7 and 8 are respectively a longitudinal section and an end elevation of the lead supporting and gripping member shown in Fig. 3; and

d a longitudinal sectional elevation of a modified form of spiral.

In the embodiment of the invention illustrated in the drawings, the pencil comprises a 1carrel le, which may he formed of any suitable material, sach as wood, plastic or metal. front end of the barrel il) is tapered, as shown at l l, and ren ceives tapered or conical. end l2 of the pencil tip i3. The tip i3 at its outer end has a cylindrical here lli which receives a tubular lead guid ing member i ii. The lead guiding member it has its cuter end a cylindrical here Il for guiding the lead `and is provided with. a pair oi inwardly lient resilient iingers i8 and le which grip the lead and prevent the lead fromv falling out. The outer end of the tip i3 is beveled, as shown at 2U, and thc outer end of the member I6 is also beve cied, shown at 2l, these two hevels being formed on the same angle and merging, as clearly shown in the drawings.

(ci. iszcng) The barrel it houses cylindrical spiral' 25 having spiral slot 2B extending throughoutthe length tiierecfl The iront end' of the spiral' 25: is anchored in a collar 'iwhicli fits into the tapered portion i2" ci the' tip it and is held therein by laps or prongs The collar 2ihas a notch 2e its iront edge which receives the outwardly cent end 3'@ of the spiral 25; The engagement of the end te with the' notch' 2s prevents the spiral fri si rotating; relative tri the' collarl; l

T a end ci the" spiral 2'5' is anchored by a collar 35 which abuts against the rear end of the barrel it. The spiral H extends through the collar 3i? anc. the outer end of the spiral strip is bent laterally, shown at 35, to anchor the spiral in the collar. From the foregoing description it will he clear that the spiral is anchored in the barrel il. by; the collars 2l and 35.

A modified form of spiral strip is shown in Fig. il. In this form the edges ci' the strip liforming the spiral have inwardly extending flanges or beads 5i which stiien or strengthen the strip and also forni supports for the lead.

The rear end portion of the barrel is reduced in section, as shown at 31, and receives a cap 38 having an opening 3e in its outer end alined with the spiral 25 so that in order to rell the pencil it is merely necessary to drop the lead through the opening i into the spiral 25. This is done after the lead feeding member il has been retracted to the position shown in Fig. l.

The lead ieeding rnember 4! consists of a longitudinally extending hody portion lli having lugs projections 13.2 and i3 at the front and rear ends thereof. These lugs extend into a longitudinal. groove It formed in the inner wall of the rrei At its iront end the body portion lli s an inwardly extending lug l5 adapted to be positioned in one portion of the spiral slot in the spiral 2li and at its rear end adjacent the lug 43 the cody portion Il! has an inwardly,r extending finger le which extends through the slot 2li and to the spiral. when the lead feeding member is in operative position, as shown in Fig. 2. When the 'feeding member is retracted, the lug 43, in coniunction with the conical surface lil' of the collar 35, causes the rear end of the feeding member to he swung outwardly, thereby withdrawing the lead feeding nger it from the spiral to permit leadreplacements to ce ied into the rear end of the spiral through the cap opening 39.

lr. order to feed the lead the pencil, the bai'- rel i@ is rotated relative to the tip i3 or vice versa. This relative rotation causes the lead fee-ding member lll to he fed along the spiral 25 since the spiral is fixed relative to the tip and as the tip is rotated the lugs 42 and 43 will move along the groove 46 in the barrel and the rotation of the spiral will cause the lead feeding member to move along the spiral.

The collar supports the outer end of the spiral 25 and is rotatably supported in the cap 36. The cap thus forms a bearing for the collar.

Although one specific embodiment of the invention has been particularly shown and described it Will be understood that the invention is capable of modication and that changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention, as expressed in the following claim.

What I claim is:

In a mechanical pencil, a barrel, a lead snpporting and guiding spiral therein, a tip on the front end of the barrel, means in the tip for supporting the front end of the spiral, said spiral projecting beyond the rear end of the barrel, lead feeding means in the barrel having a portion engageable with the spiral to feed the lead, said feeding means having a spiral engaging portion, a lead engaging portion, and an outwardly and rearwardly extending lug, and a collar on the projecting rear end of the spiral disposed in abutting relation to the rear end of the barrel, said collar having a tapered surface engageable with the lug of the lead feeding means when said means is 4 retracted to lift the lead engaging portion thereof out of the spiral, said barrel having a surface on its rear end engaging the lug to move the lead engaging portion 0f the lead feeding means to operative position.

HUGO S. HASSELQUIST.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 246,339 Powers Aug. 30, 1881 1,381,517 Swanberg June 14, 1921 1,406,362 Fowler Feb. 14, 1922 1,485,073 Funk Feb. 26, 1924 1,489,765 Jones Apr. 8, 1924 1,563,217 Moore Nov. 24, 1925 1,606,909 Wahl Nov. 16, 19'26 1,694,945 Keeran Dec. 11, 1928 1,724,245 Woelrn Aug. 13, 1929 1,736,568 Aulrnan Nov. 19, 1929 1,348,608 Deli et al Mai'. 8, 1932 2,131,551 Deli Sept. 21, 1938 2,441,167 Raspet May 1l, 1948 FOREIGN PATENTS Number Country Date 1,953 Great Britain 1874 256,110 reat Britain Aug. 5, 1926 462,749 Great Britain Mar. 16, 1937

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