US1292426A - Pencil. - Google Patents

Description

0. H. BHASELTON & F. M. CARROLL;

PENCIL. APPLICAITIONQILED mmo, 19:1.

Patented Jan. 28,1919.

7 7. 12 IIVI/ENTORS Fred M Gar/a Chas/er arose/for;

' ATTORNEY UNITED STATES PATENT OFFICE.

i HES'DER H. BRASELTON, OF TOLEDO, OHIO, AND FRED M. CARROLL, NEW YORK,

V N. Y.; SAID BRASELTON ASSIGNOR T0 SAID CARROLL.

PENCIL.

Specification ct Letters Patent.

Continuation of application Serial No. 695,842, filed May 6, 1912. This application filed. January 39, 1917.

Serial No.

To all whom z'tmuy concern:

Be it known that we, Cnns'rnn H. Bnasnn- TON and FRED M. CARROLL, citizens of the United States, residing at Toledo, in the county of Lucas and State of Ohio, and New York, in the county of New York and State of New York, respectively, have invented certain new nd useful Improvements in Pencils, of w iich we declare the following to be a full,'clear, and exact description.

This invention relates to pencils and particularly to that class of pencils in which the lead is protruded from its holder or casing as the lead is worn away keepin the pencil of substantially the same lengt i, as distinguished from the class of pencils in which the covering for the lead usually of paper or more often wood is gradually cut awa or removed 'to keep the lead exposed. T is is a substitute application of our earlier application Serial No. 695,342 filed May 6,1912.

the lead opposite that to be used and The main object of the invention is to construct a pencil of more economical lnanu facture than those at resent on the mar ket andof simpler an more efficient construction and operation. These objects are obtained in the present invention through the revision of novel means for protruding the ead from its casing when desired which means includes a fluid body of liqui semiliquid or plastic material confined in the casing of the pencil and adapted upon application of pressure toact on the end of reect'the latter end from the pencil casing.

he means for applying pressuretothe'fluld material is allowed to move in one direction,

namely that which tends to protrude the lead from the casing but the construction in this respect. is such that the non-solid which:

backing for the pencil can not yield in the opposite direction to allow the protruded lead1 to recede into its casing asthe pencil is use Other and incidental objects will readily appear from the following description of the invention taken in connection with the accompanying drawings which accompany and form a part of time specification and in Figure 1 is a longitudinal sectional view of our improved pencil.

Fig. 2 is a transverse sect onal View taken on the line 22 Fig. 1 looking in the direction of the arrows.

ratemeooan. as, 1919.

Fig. 3 is a detail, enlarged sectional view i of the backing plug for the lead.

Fig. 4 is an enlarged view of a portion of the metallic lead inclosing tube, and Fig. 5 is an end view of the tube shown in Fig. 4.

In the drawings, 1 indicates the main portion of the pencil which may be made of' wood, metal or other suitable substance. This is prov1ded witha chamber 2 in one end, which is connected with the oppositepointcd end 3 of the main portion 1 by a longitudinal bore l. Inserted within the bore 4 is a metallic tube 5, thebore of which is slightly restricted at the end 6, which 1 end is split at one point 7 on its periphery to provide a yielding grip by this portion 1 I of the tube on the inelosed lead. The end 6 of the metal tube is beveled as shown at 8 to continue the pointed effect of the pencil beyond the end of the main portion 1. A.

core of lead 9 is located in the tube 5 and when of its original length extends from substantially one end of this tube to slightly beyond the other end suliiciently, however to be exposed enough for use. A backing plug 10 cupped at one end, as shown at 11, is located within the tube 5, with its uncupped end adjacent the unexposed end of the lead core 9.

Rigiilly mounted within the chamber 2 of the main portion 1 of the pencil is the enlarged head 12 of the tube 5. This head portion of the tube is provided with a cavity. 13 which connects at 14 with the bore of thometullic tube proper. The head 12 is. in tcrnally screw threaded at 15, the threauls coiiperating with external threads on a plug 16, closely fitting the cavity 13 of the head 12. The non-solid or plastic material is placed in the cavity 13 of the head 12 and screwing of the pliig 16 into this cavity is adapted to cause the material therein to flow down the bore of the metal tube 5, pushing ahead of it the backin plug 10 and the lead tl'which it engages. n this way the lead 9 may be protruded from the tube 5 as the pointed end of the pencil becomes used away in use.

To provide means for readily turning the' to project the lead from the point of the the pointed end of the pencil.

pencil, the plug provided with a headl? having ratchet teeth 18 on one side of it cotiperating with opposed ratchet teeth on a disk 20, which loosely mounted upon a reduced portion 19 of the plug which axially projects beyond the head 17 and the ratchet teeth 18. This reduced portion loosely carrying the disk 20 is surrounded by a coil spring BS'bearing at one end, upon the disk 20 and with its other end upon an enlarged portion 22 of the reduced portion 19 of the plug. This spring serves at all times to engage the, ratchet teeth 18 with the opposing ones of the disk 20 and these teeth are so shaped, as shown in the drawing, that rotation of the disk 20 in a clockwise direction,

Fig. 2, will similarly rotate the plug 16 so to force a portion of the fluid material confined in the cavity 13 into the tube 5 and project more of the'lead from said tube at In the particular form shown rotation of the disk 29 in a countercloclnvise direction, Fig. 2, does not rotate the plug 16, the ratchet teeth of the disk merely slipping over those of the head 17 being allowed so to do by the spring In this way the lead 9 may be protruded from the tube 5 and the pointed end of the pencil as it becomes worn away 1n use, I

A. sleeve 24 which serves also to cover the inclosed mechanism and to support an erasing rubber 25 for the. pencil provides a means for rotating the disk 20 in either direction. This sleerevia supported by the end of the main portion 1 of the )encil and is internally bcadedat 26. which )eading is located in a circuinl'ercntial groove inothe main portion 1. thus providing such connection between the sleeve and the rnunber 1 that they may have independent rotation but no independent longitudinal moven'ient. Dianietrically spaced hmgitiui'inal ribs 21 are provided in ihe sleeve 24 which play-in (oni'esponding notches 27 in the periphery of the disk 20. Through these ribs and notches the rotation of the sleeve 24 is comniunira ted to the disk 20. As above described, rotation ofthe disk 20 in one direction only is oifoctive to rotate the plug; .16. rubbm-"BS is supported in the end of the sleeve 24 in the usual manner by an internal a screw The erasing f a fluid backing for the lead,zand means for applying pressure to the fluid backing to protrude the lead from its casing.

2. In a pencil, the combination with a casing having a longitudinal opening there through enlarged at one end, of a lead mounted in the opening in the. casing, extrusive material mounted in the enlarged portion of the opening and at the back of the lead, and means for applying pressure to said material to force a part of it from the larger portion ol? the opening intothe portion'of smaller-diameter and thus project the lead from its casing.

.In a pencil, the combination with a casing having a longitudinal, opening therethrough, of a lead mounted in said openin a cavity at the back or the lead in communication with said opening, finidniaterial in said cavity, a plug working in said cavity, and means for forcing the plug into the carity toi'orce a portion of the material therein from it intothe openingin the casing and behind the lead whereby the latter may be protruded from the casing.

at. A pencil comprising a casing having a longitudinal opening, a tube mounted in the opening adapted to yieldingly hold a :lead

therein, fluid material at the back ofthe lead in the tube and in a recess at. one end thereof, a plug for forcing the material from the recess into thetube, and means for forcing the plug into the recess operable from the zter ior of the pencil whereby the lead'when desired may be protruded from its casing and tube 5. A pencil comprising the combination with a casing, having an opening-therethrough, of lead mounted in the recess oflarger diameter than" the opening but in communication therewith in one end of the casing, and with its walls internally opening, a

screw threaded, fluid material-in the recess,

threaded plugiworking in the recess with its qthreads cooperating with the thrcadedintcrior surface ofthewalls of mounted on' the adjacent the latter, a sleeve endof the casing, and connections between the sleeve andthe screw plug whereby rotation of. the former ellects rotation and movement of-the latter into therece'ss and j v the fluid material from the.

forces some of lie latter into the opening in the casing to protrade the load from the pencil.

6. A pencil comprisi igthe combination of a casing, a longitudinalboi e thereima re ccss in one end of the casing of largerdiamelerilian the bore and internally screw threaded, a lead mounted in the longitudi an] opening of the casing. extrusive material mounted in thcrcccss intheend-of thecasing. an externally screw threaded plug working in lhc recess in the casing? and having a licadcd porl ion provided with ratchet teeth. a disk having opposing ratchet teeth spring held with its teeth in engagement with the ratchet teeth on the head of the plug to rotate the latter when the disk is rotated in one direction only, and a sleeve rotatively mounted upon the casing and connected withsaid disk to rotate the latter in either direction;

7. In a pencil, the combination of a casing; a lead mounted therein; a member movable longitudinally of the casing; and means end of the casing, a chamber at the other end of the casing connecting with the bore in the latter but of a difi'erent diameter than said bore, extrusive material mounted in said chamber, and a rotary member mounted on said casing adapted when rotated to have a slight longitudinal movement relative thereto, said member cooperating with the extrusive material in the chamber to force some of it therefrom into the bore of the casing and to project the lead therein from the latter, this movement of the lead being greater than the longitudinal movement of the rotary member.

10. In a pencil, the combination of a casing, a lead mounted therein, a longitudinally'movable member for rotruding the lead therefrom, and capab e of rotative movement, and ratchet connection for rotating said member and through said rotation moving said member longitudinally.

In witness whereof we have hereunto set our hands.

CHESTER H. BRASELTON.

FRED M. CARROLL.

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