US1426438A - Lead pencil - Google Patents

Description

D. ZAKIM.

LEAD PENCIL. APPLICATION FILED MAY 31, I921.

Patented Aug. 22, 1922..

awweutoz earner eerie-e;

DAVID ZAKII/i, OF NEW YORK, N. Y., ASSIGNOR T0 STERLING MIETALt-NQVELTY MFG (30., INC OF NEW YORK, N. Y., A. CORPORATION OF NEWYQR I{ LEAD rnncrn I-uIdW Specification of Letters Patent.

To all whom it may concern: v y

Be it known that 1, DAVID Z I a citizen of Poland, and a residentflof Bronx in the county of Bronx and State of New York,

have invented certain new and useful 1111- p p terior tubular barrel or'casing f of the pencil,

provenients in Lead Pencils vof which the following is a specification.

The invention relates to improvements" in mechanical leadpencil's of the clutch type; and, it resides in certain novel features hereinafter described whereby within the barrel; of a clutch vpencil I -,provi'de' a reservoir for leads to 'b'elusedlwith the'pencil. Mechanical pencils ofthe plunger type have been equippedv with chambers for'holding reserve leads, but I'am not aware that a clutch pen cil has been so constructed, as to providefa reservoiror chamber for reserve leads, and my invention isconiinedto means for ion ing within the barrel of a clutch penc heX terior to the clutchtube an adequate cha nber for holding reserve leads, v

The clutch pencil of my invention comprises an exterior tubularbarrel tapered at its forward end to iorma tip member, a clutch tube within said barrel, a head carrying said clutch tube and threaded to engage a projectionor thread within the rear end of said barrel and a tubularinember located within said barrel and eXteriorto and encompassing the clutch tube, said-tubularmernber permittingof a free sliding movement of the clutch tube through it and having at its ends laterall-yextending ineans for engaging the inner wall oftheexteriorbarrel and forming a chamber between itself and the exterior barrel for receiving a reserve stock ofleads; p,

The invention will be fully understood from the detailed "description hereinafter presented, reference being had to the accolnpanying drawings, in which; p I

Fig. 1' is a central longitudinal section through a clutch "pencil constructed in accordance with and embodying my invention;

Fig. 2 is a perspective viewof thetubular niemberprovided by me for-insertionwithin the exterior barrel of thepencil and form-f ing with said barrel the reservoir forjreserve' leads I p Fig. 3 is atransverse section 'throughthe lead pencil, taken on the dotted line3+3 of Fig. 1";

Fig, 1 is a sirnilar 'section "througjh Patented 19212; 1921. Serial No. 3599,

same, taken on the. dottedfllineft of Fig. L d 7 s s a Fig. 5 isa cor-respondind section,' ta-ken.

on the dotted line 5 5 o f Fig. 1.; p p Inthe drawings, lOidesignates the, ex-v 11 a tapered tip-memberjforn ed on the for}vv ward end of said fbarrel, 12'1thefclutchitube, s and 13 a head o hich. an u 'h-. ube, '.is"

secured andlwhich' is formed with a net lii to enter the .rear'end o'jf the bar rel lOfand whose thread is adapted to; engagejan inwardly pressed lug 15 tormedfonthebarreh 10. The rear end o fthefclutchetube Sis" secured in a socket within the nut iletl in the usual manner; and the exposedi portion; of

the head l3 will be of any suitable orna rnental' character. The thread onfthe nut 14: 1s adapted to engage the lugl5 and said lug avoids the provision o aregulanlscrew1l thread on the interior the barrel 10, The nutv 14- and 'clutch-tube 12' operate in their usual' manner, and sai d; elntcll tube. at, its; Y forward end 18 slottedon, oppositer sides up as at 16, to receive thelead 17 and operate. to clutch saidlead-WhemjQbyImeans of..thej head 13-, the clutch-tube is forced forwardly,

so that the members, ofits forward end lock,

come pressed against the inner walls of the,

tapered tipgmernber 11 ofthebarrel or cas;

ing "10 this being the usual operation of clutch pencils. Inaccordance with my .c'on-I str-uction the slots lfiiofthe c lltch -tube 12' I terminate within thelforward-portion of the barrel or casing 10,, and hence the tube 12 I from the inner ends oi -the slots'lfi to" the. nut 14E present integral 5 mootnunbrokea surfaces. l I p I In e nce' Wlth ,my invention I lnsert,

into the outer casing orbarrel 10 thereser voir-forn ing member 18 separately illustrated in Fig. 2 and consisting, of atube 19 fer to make the same .ofs sheet, metal .andof cup forinand to give the samexsuch propo'rvtionsas will insure, byfthefit oi 'stl within theb arrel 1Q thereinalningstatioriea ary of the member 18 after said member has been introduced to position within said barrel. The arms 21 1 form from the material of the tube 13 by slitting the end of the tube and bending the slitted members outwardly to form the arms 21 and forwardly extending arms 22. The arms 22 also tightly tit within the exterior casing or barrel 10 and aid in maintaining the member 18 stationary and properly spaced from the inner walls of said casing. The tube 19 is of a diameter to snugly receive the clutch tube 12 and to permit said tube to have its usual movements forwardly and backwardly in the customary manipulation of a clutch pencil. The tube 19 is beneficial in its relation to the clutch tube 12 in that it serves as a guide for said tube 12 and helps to maintain. the same concentrically within the exterior casing or barrel 10. I provide the tube 19 more especially for the purpose of forming be tween itself and the inner walls of the exterior casing or barrel 10 a chamber 23 to serve as a reservoir for reservoir leads, which I number 24. The arms 21 space the tube 19 at its rear end from the inner walls of the barrel 10 and leave entrance spaces,

23 and as a support for the leads 2% during the use of the pencil. The arms 21 by being widely spaced apart, as shown. in Fig. 3, form entrance spaces for the leads 2 1, and also as means for guiding the clutch end of the tube 12 to the tube 19, through which said tube 12 is passed on being introduced to its position shown in Fig. 1.

hen leads are to be introduced to the chamber 23 the head 13 and tube 12 are withdrawn from the exterior casing or barrel 10, and after the leads 24; have been inserted between the arms 21. and into the chamber 23, said head and tube 12 are restored to position, the leads 24: then being confined within the chamber 23 and be i tween the head 20 and the nut 1 1 carried by said head, as represented in Fig. 1. The reservoir forming member 18 keeps the leads 24c separated from the tube 12 or from in any manner interfering with the operation of said tube. The member 18 is comparatively inexpensive to manufacture and converts the clutch pencil into a reservoir pencil adapted for holding a reserve stock of leads. I i

I do not limit my invention to all of the details of form and construction hereinbefore described for carrying out my invention, but I recommend the construction shown in Fig. 2 since it is one which has proven to be of practical merit.

What I claim as my invention and desire to secure by Letters Patent, is:

1. A clutch pencil comprising an exterior tubular casing formed integrally therewith I ith a forward tapered tip-member, a central clutch tube extending longitudinally through said casing and adapted at its forward end to said tip-member, and at its rear end having rigidly secured thereto an exposed head carrying a nut in threaded engagement with the rear end of said exterior casing, said head closing the rear end of said casing and being detachable with said tube from said end of said casing, and an elongated tube through which said clutch-tube extends and by which it is guided in its longitudinal movement in which elongated tube has on its forward end a cupshaped head closely engaging at its sides the interior walls of said casing and serving to position said elongated tube, said head. also serving as a support for reserve leads introduced through the rear end of said easing into the chamber left between said elongated tube and said casing.

2. A clutch pencil comprising an exterior tubular casing formed integrally therewith with a forward tapered tip-member, a central clutch tube extending longitudinally through said casing and adapted at its forward end to said tip-member, and at its rear end having rigidly secured thereto an exposed head carrying a nut in threaded en gagement with the rear end of said'exterior casing, said head closing the rear end of said casing and being detachable with said tube from said end of said casing, and an elongated tube through which said clutch-tube extends and by which it is guided in its longitudinal movements and which elongated tube has at its forward end a laterally extending head closely engaging the interior walls of said casing and at its rear end laterally extending spaced-apart arms closely engaging said walls, a chamber for reserve.

leads being formed between said elongated tube and said casingand said leads being introducible into said chamber through the rear end of said casing and between said spaced-apart arms,and said head serving as a support for said leads. y

3. A clutch pencil comprising an exterior tubular casing formed integrally therewith with a forward tapered tip-member, a central clutch tube extending longitudinally through said casing and adapted at its forward end to said tip-member, and at its rear end having rigidly secured thereto an exposed head carrying a nut inthreaded engagement with the rear end of said exterior casing, said head closing the rear end of said casing and being detachable with said tube from said end of said casing, and an elongated tube through Which said clutohformed between said elongated tube and said tube extends and by Which it is guided in its casing and said leads being introducible into longitudinal movements and which elonsaid chamber through the rear end of said gated tube has at its forward end a laterally casing andbetween said spaced-apart arms,

5 extending cup-shaped head closely engaging and said head serving as a support for said 15 the interior Walls of said casing and at its leads. Y a rear end laterally extending spaced-apart Signed at New York city,v in the county arms Whose extremities are bent longituof New York and State of New York, this dinally to engage the inner Walls of said cas- 27th day of May A. D., 1921; a i

10 ing, a chamber for reserve leads being D AVID ZAKIM.

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