US1693578A - Magazine pencil - Google Patents

Description

Nov. 27', 1928. 1,693,57 l

` J. sTRAKA MAGAZ INE PENvCIL Filed April 18, 1921 lwenor En n I owww wd/fg@ Patented Nov. 27, i928,

-narran stares entrant onirica.

JOHN STRAKA, F CHICAGO, ILLINOIS, ASSIGNOR, lBY DIRECT AND MESNE ASSIGN- MENTS, TO THE WAHL COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 0F DELAWARE.

Application filed April 18, 19251. Serial `No 462,146.

A This application, in so far as the subject matter relating to' the separation of the holder and the tip intact, with their associated parts, by a simple relative longitudinal movement of the tip and holder, is concerned, is a continuation of my copending application,A

. rect endwise movement, whereby a great deal of time may be saved in reloading the lead feeding mechanism of the pencil. Another object is to provide pencil lead feeding mechanism, containing a lead receiving member in which is mounted a lead feeding pin which cooperates with a spiral track to feed the lead out of the handle, which lead receiving member and its lead feeding pin may be disconnected from the remainder of the pencil by one endwise movement therefrom, whereby when removed, the lead feeding pin may instantly return to an initial position solely by gravity.1 Another object is to provide a pencil wherein all of the parts thereof may 3o sembled without the aid of any special machinery. Another object is to provide improved means for effectively securing in place -an eraser member and a cap for the eraser.

With these andother objects and radvantagesin view, this invention consists in a lead pencil having a lead receiving member and a lead feeding pin associated'therewith, which may be disconnected from the remainder of the pencil by one endwise movement, whereby thelead feeding pin is free to gravitate to an initial position when removed from the handle. The invention furtherpconsists in the several novel features hereinafter fully set forth and claimed.

The invention is clearly illustrated in the accompanying drawing, in which v:--

\,Fig. 1 is a side elevation of a pencil embodying a simple form of the present invention; F1g. 2is a central, longitudinal section an eraser member 'and a. combined magazine and guide member, showing the three membe quickly and readily disassembled for thef. purposes lof repair and may be readily asbers disconnected from each other; Fig. 4c is a perspective view of fragments of a guide member and lead receiving member, showing the same disconnected from each other in posltion for reassembling the two; Fig. A5 is a detail cross-section taken on theline 5 5 of Fig. 3; Fig. 6 is a detailcross-section taken on the line 6-6 of Fig. 1; Fig. 7 is a detail cross-section taken on the line 7-7 of Fig. 3; Fig. 8 is a detail cross-section taken on the line 8-8 of Fig.v 3;.Fig. 9 is a detail crosssection taken on the line 9-9 of Fig. 3; Fig. 10 is a detail cross-section taken on the line 10--10 of Fig. 2; Fig. 11 is a view, partly in side elevation and partly. in section, of a modified form of the invention, andFig. 12

is a detail crosssection through a slightly modified form of theeraser portion. Figs. 2 to 10, inclusive, are on an enlarged scale.

Referring to said-drawing, the reference character 10 designates the tubular casing or outer shell of the pencil, which, if desired, may be hexagonal or other suitable cross-section, said casing or shell being open at both regatas ends and the end containing the pencil point being slightly Figs. 1 and 2.

Removably secured in said casing 10 is a tubular guide member 11 in which is removably secured the lead receiving member 18 and its lea-d feeding pin 24, whic i guide member, for convenience in construction and assemblage, is made up in connection.. with a tapered, as shown at 10 in `magazine portion 12 which is of the same cross-Section as the casing shell 10-and is frictionally held against the internal face thereof. At the place 13 where the tubular guide member 11 joins the magazine portion 12, the wall thereof may be reduced to circular form, as is indicated in Fig. 7 and if desired, a disc 14 may be placed against said reduced part to provide a )partition between the magazine portion 12 and guide member 11, although this partition may be omitted, if desired, to leave a continuous chamber extending through the magazine portion 12 and guide.

member 11.

The uide member 11 is preferablylmade cylindricalortubular in form and is provided with laterally disposed, lengthwise extending guidewaysl (see Fig. 8v) which may thereof; Fig. 3 is a side elevation .of a cap,

be .jfiormed by striking up the metal to p'rovide'lengthwise extending beads that form grooves in the internal face of the guide memin@v ber 11. Said guideways open out in an endwise direction toward the pointed end of the pencil, to permit the lead receiving tub-e 18 with its lead guiding pin 24 to be freely disconnected from said guidemember 11 and casing 1() by one direct, endwise, outward vmovement of the lead receiving tube from the posite projections that have inclined edges 16, which are provided for the purpose of facilitating thereassembling of the lead receiving member and lead feeding pin with the guide member and casing. The guide member 11 is also formed with oppositely disposed lengthwise extending slits or slots 17 whereby the opposite parts of the wall of the guide member adj acentsaid slits may be sprung together lslightly to 'afford a frictional grip upon the lead receiving member.

The lead receiving member 18 may be in theform of a tube having a small bore for the reception of a length of pencil lead 19 of small diameter, and to one end of said lead receiving member 18 is secured the pencil tip 20 which is taperedand when in position on the casing projects eyond the tapered end 10a thereof, to form a continuation thereof. The lead receivin member 18 and tip"20 may be secured toget ier by soldering them together Y or in any other suitable fashion. Within the tip 20 the lead receiving member 18 is reduced in diameter as at 21 and a lengthwise extending slit 22 is formed in said reduced portion 21 and the two slit parts of said reduced portion are sprung towards each other slightly, so as to afford a firm grip upon the pencil lead. v

' To obtain a slight amount of flexibility for the tip, I provide a resilient annular member between the tip and casing. To obtain this flexible connection, the tip is formed with a reduced neck 33, which enters the tapered end 10L of the casing,.and on said reduced neck 33 `is secured a sleeve 34 which is constructed of spring like material, and bears against the internal wall of the tapered part of the casing. The neck 33 is further reduced in diameter at 35 and thesleeve 34 is slit lengthwise to leave flexible tongues 36 that bear against the'internal wall of the tapered end of the casing. This arrangement and construction allows' the lead receiving tube 18 and tip 20 to flexfrom the place Where the tube 18 is secured in the guide member 11 when the lead is pressed laterally (as is the case when used in writing) and the slitted sleeve acts to return the tip to an axial position directly upon the release of lateral pressure on the lead. The purpose ofthe flexible tip connection is to Jprevent the lead from being broken whenit is pressed with considerable force against the surface on which the pencil is writing. The sleeve 34 may be held on the neck 33 by forming an annular groove in the neck and an inwardly pressed bead in the sleeve, which seats in said groove. If desired, an outwardly pressed groove may be formed in the sleeve for engagement'with a shoulder on the inner .face of the tapered end of the casing.

Beyond the tip 20, ber 18 is formed with a spiral track which ma comprise a spiral slot 23 -formed in the wal of said lead receiving member 18, and in the bore of said member 18 is contained the lead feeding pin 24, which has a laterally projecting end portion 25 that protrudes the lead. receiving memthrough said spiral slot and enters one of the A lengthwise extending guideways 15 of the guide member 11. hor convenience in construction, the spiral slot extends to the end of the member 18 and its open end is closed by a plug 26 soldered or otherwise secured in the end portion of the member 18.

The lead receiving member 18, is slidably as well as rotatably secured in the guide member 11 and it is obvious that when one is r0- tated relative to the other in the proper direction, the lead feeding pin will be moved which tits on the end portion 12Zt and a rcduced part 29, in which is secured a block of eraser material 30.y The extreme end of the4v .eraser shell 28 may be turned in as shown, to

grip the eraser material 30. On the reduced part 29 of the shell 28 is removably secured a cap 31 for inclosing the eraser material 30. To obtain frictional engagement between the eraser member shell 28 and end portion 12, I emboss or slightly raise the material of the part 12a at the places indicated by the reference character 12b. The slight increase in diameter of the end portion 12 at saidembossedor raised parts 12b furnishes sufficient friction against the internal face of the shell 28 to securely -hold it on the end portion 12", but this friction is easily overcome when the vshell is pulled olf the same. The reduced part 29 of the shell 28 may be embossed in the same manner to securely hold the cap in place thereon.

A clip for securing the pencil in place in Legame azine and casing` and, if desired, the thickness of the tongue 32 of the clip 31 may be sufficient to create the necessary friction between the contacting walls to securely hold the magazine in place in the casing. .c

The chamber of the magazine 12 may contain a number of lengths of lead for use in connection with the pencil, and these leads may be removed through the upper end of the magazine by removing the eraser member 27, or, if desired, the partition 14 may be omitted and the leads may be discharged through the guide member 11 whenever the lead recciving member 18 is disconnected therefrom.

To load said lead receiving member 18, the latter is drawn out of the guide-member 11 by one direct endwise or lengthwise movement. This is possible because the guideways which hold the lead feeding pin 244 against rotation relative to said guide member 11 open out in the direction of the pointed end of the pencil. After the lead receiving member has been withdrawn, it is inverted so as to bring the tip -uppermost and this permits t-he lead feeding pin to fall by gravity to the bottom of the spiral track 23. A length of lead may now be inserted through the tip and because of the spring pressure of the slitted reduced end of said lead receiving tube 18, the length of lead is securely held in the lead receiving tube. The latter may now be inserted through the open tapered end of the casing and because of the inclined guiding edges 16 of the guide member 11, the projecting end 25 of the lead feeding pin will automatically find its way to one of the guideways 15 in the guide member 11. Fig. Il illustrates the relation between the lead feeding pin and guide member 1l when the lead receiving member 18 is about to be inserted.

into said guide member 11.

As the lead wears down from use, it may be fed forward by turning the casing relative to the tip in the right direction, thereby turning the guide member 11 and therewith the protruding end of the lead feeding pin, causing said end to travel down the spiral track 23 of the lead receiving tube and consequently feeding the lead out through the tip.

By reason of the disconnectible feature of the lead receiving tube from the guide member in the casing, very little time is consumed in reloading said lead receiving member- There are no parts to unscrew, but the disconnection of the parts is made by one direct endwise movement of said lead receiving member. By providing an out-let for the leads from the magazine through the guide member 11, further time may be saved in reloading, because when the lead receiving member is disconnected from the handle, a length of lead may be dropped out, inserted in the tip and the parts reconnected. In case any ofthe leads remain in the guide member,

they may be returned to the magazine by shaking or slightly jarring the handle while held in an inverted position.

In Fig. 11 is illustrated a slight modification 0f the invention. The spiral'track on the lead receiving member 18a is in the form of aspiral groove 28a in its external face, and a lengthwise extending slot 15a is formed in the wall of said member 18a through which the protruding end 25a of the lead feeding pin 24 extends. A sleeve 1la surrounds the member 18L and has teeth 11 that travel in the spiral groove 23a. Said sleeve is non-rotatively connected with the casing, as for instance by making its external face many sided and guided to move lengthwise in a many sided rguide member 11C.

In Fig. 12 the frictional connection between the erasure member and casing or between the cap and eraser member is obtained by making the side walls of the member which extends overthe other, of inwardly curved cross-section, as at 12C. When placed on the inner member, the latter distends or straightens out the inwardlyv curved sides, and creates sufficient friction between the two to firmly hold them together and thereby prevent them from becoming accidentally separated.

More or less variation of the exact details of construction is possible without departing from the spirit of this invention; I desire, therefore, not to limit myself to the exact form of lthe construction shown and described, but intend, in the following claims, to point out all of the invention disclosed herein,

I claim as new and desire to secure by Letters Patent:

l. A lead pencil, comprising a tubular pencil casing, a tubular guide member secured therein andformed with internal lengthwise extending grooves opening out toward the point end of the casing, a lead receiving member having a bore therein for receiving a pencil lead, `and a spiral slot, and a lead feeding pin movable lengthwise in said bore-and having laterally projecting part entering said spiral slot and one of said grooves, said lead receiving member with its lead feeding pin being removable from said tubular guide member andA casing by one direct endwise movement when in any position of adjustment. f

2. A lead pencil comprising a tubular pencil casing, a tubular guide member secured therein and having a lengthwise extending open ended guideway and terminating atits outer end in an inclined annularly disposed guide portion, a tubular lead receiving inember having a lead feeding pin in its bore, provided with a lateral projection adapted to be guided into said guideway by the inclined annularly disposed guide portion.

3; A lead pencil comprising a tubular pencil casing, a tubular guide member securedtherein and formed withv internal, laterally lie member, having a bore therein, and a spiral track inrits wall, and a lead feeding pin in said bore and having a lateral projection traveling on said track and protruding into said groove, the lead receiving member being removable from the casing andthe lateral projection on the lead feeding pin being guided into the grooves'by the inclined annularly disposed guide portion. i

4. A lead pencil comprising a tubular casing, a guide member therein, a lead receiving member frictionally held in said guide member, a pencil tip secured on said lead receiving member, and a llexible sleeve interposed between said tip and casing, slaid sleeve being yieldable upon a straight longitudinal pull upon the tip to permit detachment ot' the tip from the casing while the guide member remains in the casing.

5. A lead pencil comprising a tubular casing, a guide member therein, a lead receiving member frictionally held in said guide member, a pencil tip secured to said lead receiving member and having a reduced neck extending into said casing, and a flexible lengthwise slitted sleeve secured on said tip and interposed between said neck and casing, and so'arranged that upon a longitudinal pull upon the tip the sleeve will llex and permit detachment of the tip from the casing, the guide member remaining in the casing.

6. A lead pencil comprising a tubular casing, a tubular guide member therein, having a bifurcated end, a lead receiving member frictionally held in`said bifurcated end, a tip secured on said lead receiving member and having a reduced neck extending into said casing, and flexible members interposed between said neck and casing and so arranged that said members will'tlex upon a longitudi- `nal pull upon the tip to permit detachment ot the tip from the casing.

7. A pencil having a hollow body, a tip` therefor removably fitted thereto to rotate relative thereto, a spiral carried by the tip and extended to lie within the body, a plunger mounted to travel within the spiral to advance a lead therethrough, an element projecting laterally from the plunger to a point exterior-ly ol the spiral, and means surrounding the spiral and within the body forming a longitudinal channel open at the end adj acent the tip and adapted to' slidingly engage said element to hold the plunger against-rotation Wlien the tip is turned to effect propulsion of the plunger, the tip together with the pai'ts carried thereby beiner removable -from the 'channeled means andtbody by direct longitudinal movement of the tip relative to the body substantially as described.

lalso engaging said longitudinally disposed guide means, so that relative rotative movement imparted to said feeding pin and said guiding member by relative rotation of said casing and said tip will cause the pin to travel longitudinally within said tubular lead guiding member for feeding a lead therefrom, said tubular lead guiding member, feed pin and tip constituting a unit which 'is readily conncctable with and disconnectable from said casing at any time by direct endwise movement olf the tip.

l). A pencil of the character described comprising a casing provided with an opening at one end and with an internal longitudinally extending guide-way open at its end toward the open end of said casing, a tubular leadguiding member adapted to slidably receive a lead, said member being provided with a helical track-way, a tip rotatably and removably engaging the open end of said casing, said tip being constant-ly fixed to one end of said tubular lead guiding member and of larger diameter than the same, and a leadfeeding pin movably mounted in said tubular lead-guiding member, said pin having a portion which engages said helical track-way and a portion which engages saidloiigitndinally disposed guide-way so that relative rotative movement imparted to said feeding pin andl said guiding member by relative rotation ot said casing and said tip will cause said pm to travel longitudinally within said tubular lead-guiding member7 said lead-gu idiiigmember, feed pin and tip constituting a unit which is readily connectable with and disconnectable from said casing at-any` time by direct endwise movement of the tip.

10. A pencil of the character described comprising a tubular lead-guiding member, a tip member having a central bore in which one end of said lead-guiding ,member is permanently fixed, and having a cylindrical poi'- lliii lll) ico.

tion of larger diameter than said lead-guiding said casing having a longitudinally extending guide-way, and a feed pin located within .said lead-guiding member, said leed pin and said lead-guiding member having complemental means and said pin and said guideway having complemental means for causing said pin to move longitudinally in said lead-guiding member when relative rotat-ion of the pin and the lead guiding member is eifected by relative rotation of said tip and said easing.

l1. A pencil of the character described comprising a tubular lead-guiding member, a tip member having a central bore in which one end of said lead-guiding member is permanently fixed, and having a cylindrical portion of larger diameter than said lead-guiding member, so as to provide a bearing portion enclosing the adjacent portion of said leadguiding member, a casing having a longitudinal guide-Way, said `casing having a complemental bearing portion engaging the bearing portion of the tip for maintainmg a fric-- tional engagement suiiicient to normally prevent separation thereof, but free enough to permit relative rotation, a feed pin located within said lead-guiding member, said feed pin and said lead guiding member having complemental means, and said pin and said guide- Way having complemental means, for causing said pin to move longitudinally when relative rotation of the pin and the lead guiding member is eii'ected by relative rotation of said casing and tip.

12A pencil of the character described comprising a tubular lead-guiding member, a tip rigidly secured to the'outer end portion of said lead-guidin member and provided with a bearing portion radially spaced from and concentric with said lead-guiding member, a casing having one end rotatably and removably engaging said tip and provided with a bore toreceive said lead-guiding member, and a feed pin located Within the lead iding member, Said casing having a longimtudinal guidewa said feed pin and said klead guiding mem er having complemental means, and said pin and gulde-Way having complemental means, for causing said pin to travel longitudinally when relative rotation of the pin and the lead guiding member is effected by relative rotation of said tip and saidl casing.

13. A .pencil ofthe character described comprising a tubular lead-guidin member, a tip rigidly secured to one end o said leadguiding member and provided With a bearing portion radially spaced from and concentric with said lead-guiding member, a casing having one end rotatably and removably engaging said tip and provided with a bore to receive said lead-guiding member, said feed pin and said lead guiding member having complemental means for causingsaid pin to travel longitudinally when relative rotation of the pin and the lead guiding member is ei'ected by relative rotation of said tip and said casing, and meansfor preventing relative rotation of the'feed pin and the casing while permitting relative longitudinal movement thereof.

14. In a pencil of the character described, a hollow casing open at one end and having an open-ended longitudinally extending guide-way, a lead-guide tube removably mounted in the casing, a spiral track-way provided in said tube, a tip rigidly lixed to one end of said tube, a lead propeller longitudinally movable through said tube and having means for engagement with said track-way and means for engagement with said guideway to propel a lead within said tube upon relative rotation of the casing and tip, said tip having means laterally spaced from said tube and concentrically fixed thereto for engagement with the end portion of t-he casing to prevent excessive insertion of the lead-guide tube in the casing whereby the tip is rotatable upon the end portion of the casing, the tip, lead-guide tube and propeller being removable as a unit from the casing upon a longitudinal pull upon the tip.

1.5. In a mechanical pencil a hollow barrel forming a handle portion, an inner tube removably mounted in said hollow barrel and having a substantial portion of one end of smaller cross-sectional area than the other and provided in said smaller end with a longitudinal groove, a tip removably and rotatably titted to the open end of said hollow handle, a separate extension securely fixed to said tip and provided with. a spiral trackway, and a longitudinally slidable plunger in said extension having a lateral proj ection to follow said tracliway and Said groove when said tip and handle are rotated relatively to one another.

16. A pencil comprising a holder having a hollow interior, a tip for said holder, an actuating member of smaller external diameter than the largest diameter of said tip securely fixed at one end to said tip to project into the hollow of said handle, said actuating member being formed with a spiral trackway, lead propelling means in said actuating member adapted to coact with said trackway to cause longitudinal movement of the propelling means in the actuating means upon relative rotation of the tip and holder, said tip, actuating member, and lead propelling means beine insertible into and removable from said handle as a unit by direct endwise movement in any position of adjustment.

17. n a mechanical pencil a hollow body portion, a tip secured to one end of said body portion, a tubular actuator member securely fixed at one end to said tip to extend into the hollovv of the body portion, a lead propeller in said actuator member longitudinally movable therein upon relative rotation of said tip 'and body portion, and resilient means secured to said tip and adapted to be'sprung between the bodyv portion and actuator member when the tip is applied in operative position to frictionallj7 and rotatably hold the tip in position but permit its removal with the actuator member and lead propeller as a unit When desired.

18. In a mechanical pencil a hollow barrel forming a handle portion, an inner tube removably secured in said hollow barrel and formed along its inner end portion with an open ended longitudinal groove, a tip rotatably and removably secured to one end of said barrel, a separate tubular actuator member securely fixed to said tip to extend Within said inner tube and formed with a spiral track- Way, a lead propeller in said tubular member having means to engage said traokway and said groove so that relative rotation ot' said tip and barrel Will cause longitudinal movement of saidpropelle-r, Said tip, actuator member, and lead propeller being removable from said barrel as a unit by longitudinal movement in any position of adjustment.

JOHN STRAKA.

Images