US1508171A - Pencil - Google Patents

Description

F. w. DOLIER PENCIL Filed Jan. 26, 1923 Patented Sept. 9, 1924,.

EJNHTED FRANCIS \V. DOLIER, OF MOORESTOWN, NEW JERSEY.

PENCIL.

Application filed January 26, 1923. Serial No. 614,948.

To all whom it may concern:

Be it known that I, FRANCIS W. DOLmR, citizen of the United States, residing at Moorestown, in the county of Burlington and State of New Jersey, have invented certain new and useful Improvements in Pencils. of which he following is a specification. I

This invention relates to pencils and pertains particularly to magazine pencils and to pencils for carrying extra lead.

()ne of the general objects of the invention is to provide a compact simple device which will be durable and easily operated,

and at the same time inexpensive to manufacture.

The particular features of this invention include a novel type of lead holding clutch so designed that the lead may be fed through a round smooth bore, free from obstructions, and yet be held against loss. This clutch is yieldably adjustable to accommodate any size of lead and will hold the lead without damage to the lead.

Another particular feature includes the construction of the actuating end piece and the shape and arrangement by which the rear end is assembled, and is an improvement on the construction illustrated in my copending application Ser. No. 510,493.

Another feature of this invention relates to an arrangement of a separable combined protecting cap and writing tip end for covering a split finger clutch formed of the material of the pencil and from whichclutch the cap is spaced.

The general arrangen'ient of the operating mechanism is similar to that new form illustrated inmy Patent 1,436,581.

The. above features and advantages, and

other details of the invention are described and claimed in the followlng specification and claims, and illustrated in the accompanying drawing, in which:

Fig. 1 is an enlarged view taken sectionally and longitudinally through the pencil:

Fig. 2 is a side viewof the rear end piece removed from the barrel, illustrating the end of the spring actuating screw positioned in the slot in the end piece;

Fig. 3 is a view of the enlarged portion of the barrel with the outer sleeve moved endwise, illustrating the detent member in its uncovered position, looking down on the construction shown in Fig. 1;

same diameter as the diameter of the shoul- Fig. 4 is a fragmentary view of the end portion of the barrel showing a side sectional view of the detent member;

Fig. 5 is a perspective view of the lead clutch showing the projecting lug extending radially from one side of the split tube;

Fig. 6 is a perspective view of the extreme forward writingtip, illustrating the rear threaded portion and a notched wall for the rFeception of the projecting lug illustrated in 'ig. 5; V

Fig. 7 represents a pencil with a modifica tion of clutch for a writing tip end; and

Fig. 8 isa side view of the writing tip end illustrated in section in Fig. 7.

Like parts in the various figures are identified by like reference characters.

Referring in detail to the drawing, 1 in dicates the barrel of a pencil of the type de scribed, enlarged considerably, in order to most clearly illustrate the relative positions of the parts. 1 indicates the rear end of the barrel, and 1 indicates the front end of the barrel, and the front end is provided with the threaded outer portion 1. The rear end portion of the barrel for inch or more of its length, is provided with an enlarged bore formed either as an enlargement of the wall 1, or as a section of tubing of larger size, secured to the end portionof the smaller portion of the barrel, to provide a shoulder or projecting flange wall 1. A combined actuating and rear end member 2 is shown in its removed position in Fig. 2, and in Fig. 1 in its assembled position within the enlarged bore of the rear end portion of the barrel 1. The rear end member 2 is provided with a reduced portion 2 which is adapted to slide into the enlarged bore of the barrel '1, in a manner hereinafter described and claimed as a telescopic rotatable connection. A right angle shoulder 2* is provided as a step between the portion 2 and the reduced portion 2 and this wall 2 is adapted to abut against the barrel end 1 when the parts are in the assembled position. The extreme forwardend of the part 2* is provided with an annular shoulder 2 which. has a larger diameter than the portion of the part 2 immediately adjacent thereto, thus providing a marked step. At the. rear portion of the part 2 and immediately adjacent the shoulder 2 is an annular shoulder portion 2 which has the der 2". The enlarged rear end portion of the barrel 1 has a first bearing surface adjacent the end 1; and a second bearing surface, spaced inwardly from the end and the inside diameter of the enlarged end of the barrel is approximately the same diameter as the outside diameter of the shoulders 2 and 2 Thus, when the portion 2 is positioned within the enlarged end portion of the barrel, the shoulders 2 and 2 have a close fit with respect to the inner surfaces of the barrel, and the inner surfaces of the barrel immediately opposite the shoulders 2 and 2 serve as bearing portions for the shoulders, providing a snug and yet rotatable engagement. A slot 2 is provided between shoulders 2 and 2 to extend length wise through the wall of the portion 2 for the reception of the actuating spring screw member, as will be described. lt will be observed that the rear end portion of the slot 2 has higher side walls than the forward portion. In other words, the material of the portion 2 is thicker adjacent the shoulder 2 than at the end next adjacent the shoulder 2. In the manufacture of this end portion, the tapered portion 2* may be formed by turning down a piece of solid material to cut away the taper and form the sharp step at the shoulder 2 or the material 2 could be stamped or drawn from a single piece of sheet material. in which case the walls of the slot 2* would probably be of approximately the same thickness. The i1nportant feature is to provide the shoulders 2, 2 at the same height and to provide side walls for the slot 9. extending rearwardly from the'lowest point of the slot and at the same distance from the center of the bore of the pencil so as to insure an engaging surface for the end of the actuating spring.

The front end of the barrel is equipped with a screw threaded fastening cap 3, which has a rear portion 3 with threads adapted to engage the threads 1 of the barrel. Tapering forwardly from the portion 3*, the inner walls of the cap are indicated at 3, and this tapered portion extends into a more sharply inclined part indicated at 3. From 3 and extending forwardly is a continuation of the inner wall, indicated at 3 having a ver gradual inclination and terminating at a s .oulder extending at right angles to the bore of the barrel. 'lhr final inclination of the wall 3 serves to guide the central pencil lead tube into place, and the wall 3 serves to limit the movement of the tube forwardly within the wall 3*, as will be explained. The rear end of the cap 3 is provided with a right angle shoulder 3 having an abutting engagement with the outer sleeve on the barrel, as will be explained. The extreme forward end of the cap 3 has an end surface at right angles to the bore of the pencil, indicated at 3 Just forwardly of the Wall 3 the material of the cap 3 projects inwardly providing an annular shoulder 3 which has a small central opening therethrough for the reception of a pencil lead, and through which opening the lead is to have a relatively close sliding engagement. The here through the portion 3 is understood to be perfectly smooth. From the end wall 3 the cap 8 is cut away inwardly to provide a threaded surface 3 terminating in a forward shoulder at the front end wall of the part 3*. This shoulder formed by the forward side of 3* serves to limit the inward movement of one end of a particular clutch for leads. as will be described.

Detent means for holding the actuating end piece 2 in position at the rear end of the barrel 1 is provided by a tongue memher 4 which is struck up out of the materia'. of the enlarged rear end portion of the barrel. The detent member is shown clearly in Figs. 3 and 4 as formed from the material of the barrel and extending as a continuation of the wall of the barrel from a point at l forwardly and terminating with a free end at 4". It will thus be seen that the detent member 4 is provided with a slot around three sides of it. On either side of the tongue detent member l are small notches in the adjacent side walls of the barrel. The tongue l normally lies in the plane of the wall and toward the tip 4P it is bent inwardl'v as indicated in F l. When the part 9, assembled with the barrel. as illustrated in Fig. l the shoulder 2 slides beneath the surface of the detent tongue t and finally 6r capes and the tongue end l" snaps down against the rear face of the shoulder 2 and into the position illustrated in Fig. 1. lVhen it is necessary to remove the end 2 from the barrel a pin or piece of wire may be inserted in the notches 5 and projected beneath the tongue el to raise it from engagement with the rear face of the shoulder 2 that the portion 2 and shoulder 2 may be withdra we from the barrel.

Means for covering the detent tongue l and its slot is provided by a slidable sleeve 6 which is designed to have a snug fit over the enlarged portion of the barrel and to extend between the end 1" and the shoulder if when the pencil is in the assembled pos tion. The slidable sleeve 6 has an end wall indicated at 6 which has a central opening therein with walls closely embracing the smaller portion of the barrel 1., thus providing a shoulder at 6 which the shoulder i to limit the endwise movement of the sleeve 6 when brought into its assembled position as shown in Fig. 1. A transparent. or other decorative sleeve, 7 is positioned on the barrel 1 between the shoulders 63* and S. Preferably the shoulders 6 and 3 have the same height so that with the addition of the sleeve 7 therebetween the pencil is provided with a smooth cylindrical exterior.

The writing tip end 8 of the pencil is illustrated in section in Fig. 1 and in perspective in Fig. 6. The tip end 8 is preferably made of extremely hard metal and is designed to withstand the relatively hard usage normally given the writing end of a pencil. The tip end 8 has a rear face 8 adapted to abut the end face 3 of the cap 3. A reduced tubular portion on the rear end of the tip 8 is provided with threads 8 designed to have threaded engagement with. the threads 3 at the forward end of the cap 3. The extreme forward writing tip is indi cated at 8 and within this extreme writing tip end is a central bore having smooth side walls, and having a diameter approximately the same as that opposite the shoulder 55*. Just to the rear of the shoulder 3 and the bore thereof and extending rearwardly to the end of the tip 8 and thus for approximately nine tenths of the length of the tip is a second bore for the reception'of a split tube clutch for lead as will be described. Immediately to the rear of the threads 8 is a relatively smaller tubular portion 8 which is provided with a slot 8 in the wall thereof and extending inwardly from the extreme rear end. The clutch for holding leads within the pencil point, so that the leads may be freely slidably advanced and yet held against accidental loss, is provided by means of a tube 9 split throughout its length and formed of extremely thin spring like material having a bore approximately that of the bore for the lead. In Fig. 5 the clutch tube is shown in perspective, showing the two sides of the split at 9 and at one end a radially extending lug 9 projecting as an extension of one of the walls. The lug 9 is adapted to slide into the opening 8 when the split tube is inserted into the tip 8, and when so assembled the extreme rear end of the tube 9 is flush with the extreme end of the tip 8, and both of these ends have abutting engagement with the forward end of the shoulder 3 so that the tube 9 is held'against endwise movement between the shoulders 7% and 8.

The operating mechanism of the pencil is substantially of the same general arrangement as that illustrated in my Patent No. 1,436,851. central. partition 10 is secure y fixed within the barrel by brazing solderin or other suitable means, and divides the inner bore of the barrel into a front and a rear chamber, the front chamber being magazine for extra leads and the rear chamber containing the actuating screw and the propelling mechanism. The partition 10 has an axial opening 10 for the reception of the guide tube which will be described.

' The guide tube 11 is rigidly mounted within the opening 10 by brazing and soldering and is thus fixed with respect to the barrel. projecting beyond the end of the barrel 1 and adapted to engage the inclined wall 3 and abut against the rear face of the shoulder 3 as at 3 The rear portion of the tube 11 on the opposite side of the partition 10 is indicated as provided with a slot through the wall thereof, this slot extending from the rear end of the guide tube substantially all of the way to the partition. The actuating helically coiled spring screw member 12 substantially fills the diameter of the bore of the barrel and extends substantially the full length of the rear chamber. The spring screw member 12 is free to revolve within the circular walls of the barrel; the latter portions of the spring 12 are loosely positioned within the barrel; and the coil or turns are positioned apart a distance sub stantially as great as the cross section of the material of the spring. The extreme rear end 12 of the spring 12 extends in a radial direction into the slot 2 so that by turning the actuating piece 2 the screw 12 may likewise be turned. In assembling the spring 12 in the end piece 2 the spring 12 is positioned so that the end 1E2 may be introduced into the next adjacent end of the slot 2 This may be accomplished readily because the end of the slot is relatively near the end open ing. Then the spring 12 is moved endwise along within the portion 2 with the extreme end 12* confined in the slot 2 sothat finally the end 12 is positioned at the opposite end of the slot from that at which it was introduced. This is obvious for the reason. that the projecting end 124 must first be introduced into the slot before the spring 12 can be brought into alignment with the part 2 in its assembled position. The actuated screw and plunger 13 is illustrated in Fig. 1 in its assembled position. This structure is peculiar in that the plunger rod is continuous and formed in one piece with the screw portion 13 A right angle shoulder 13 extends from the straight rod 13 to the helical turn of the actuated screw part 13". This member is inserted in the rear end of the barrel by fitting the rod 13 into the slotted guide tube 11 so that the right angle shoulder 13* extends through the open slot and is prevented from turning by the side walls of the slot. By referring to F 1 it will be noted that the respective size and position of the turns of the helical screw portions 12 and .13 are substantially the same and that the turns of the member 13 substantially fill the spaces between the adjacent turns of the member 12. The details ot the rod and spring screw members are described and claimed in my Patent No. 1,436,581.

A modified form of clutch for lead and The tube 11 has the extreme end extreme writing tip end is illustrated in 1 7 at the front end of (Y ti a 7 ed portion is provided alignment Wliil'l the bore lied by the material of ard of the threads 14: fingers 15 having the a j ent fingers and so to press yieldably and resilthe bore to be occupied by a c ringer clutches were known for m QOliUITP but such clutches have rough or else .ieen ad ustably held 5 e part the pened in Fig. 7 an 'p end 16 1s an extreme rear a corresponding 2a in the inside of i or tapered. surface from the 15. it

l .vriting end of the tip 1 'ing the side walls 16,

2% i e ericclil smooth and cylin- Ii 1 designed to closely hold a lead. This the ngers have unhindered freedom of action to lightly hold the lead against loss and at the same time the fingers a are protected by the tip 16 which also provides a nooth bore for the lead at its extreme forward end.

in this pencil assembly, illustrated in Fig. l the outer surface of the pencil is smooth fron'i the tapered tip 8 rearwardly along the cap 3 to the cylii'idrical portion of the barrel and thence to the extreme rear end i the sleeve In order to cover the actuating end piece it and protect the eraserwhich normally would be carried by that piece, there. is provided an end cap 17 formed a cylindrical sleeve of material p "eferably having the same thickness as that of the sleeve 6. Thus the outer surface from the cap 3 rearwardlv is given a uniform cylindrical shape. On the inside of the pencil the inner wall of the barrel 1 and the adjacent inner wall of the portion 2 extend as one so stantially continuous barrel having the same size and shape so that the spring screw 12 may have an even confining surface throughout its length.

l claim:

l. in a pencil. a barrel having an end portion, an end piece having a telescopic and rotatable connection with said end portion, and detent means carried by said barrel and extending lengthwise thereof wholly within tae outer contour of the wall of the end portion, said detent means being in releasable engagement with said end piece and permitting relative rotation but not lengthwise movement of said end piece with respect to the barrel when said detent means is in engagement with said end piece.

2. in pencil, a barrel having an end portion, an end piece having a telescopic and rotatable connection with the inner wall of said end portion, detent means carried by said barrel and extending lengthwise thereof in the wall of the end portion, said detent means being in releasable engagement with said end piece and permitting relative rotation but not lengthwise 'movement of said end piece with respect to the barrel when said detent means is in engagement with said end piece, and a sleeve slidable lengthwise with respect to said barrel and adapted to fit over said end portion and cover said detent means.

3. In a pencil, a barrel having an end portion, an end piece having a telescopic: and rotatl c connection with said end por ti ll, said barrel end portion having a slot therein, a detent member positioned in said slot and having one end thereof fixedly secured to the wall of said end portion, said detent means being in releasable engagement with said end piece and permitting relative rotation but not lengthwise movement. of said end piece with respect to the barrel when said detent means is in engagement itll said end piece.

l. lln a pencil, a barrel having an end portion, an end piece having a telescopic and rotatable connection. with said end portion, said barrel end portion having a slol therein extending lengthwise of said barrel, and a detent member positioned in said slot and having one end fixedly secured with respect to the wall of said slot and the other end movable in said slot, said detent means being in releasable engagement with said end piece and pern'iitting relative rotation but not lengthwise movement of said end piece with respect to the barrel when said detent means is in engagement with said end piece.

5. In a pencil, a barrel having an end portion, an end piece having a telescopicand rotatable connection with said end portion, said barrel end portion having a slot therein, and a detent member struck from the material of the wall f said. end portion and positioned in said slot and having one nd thercoii secured to the wall of said end portion, said detent means being in releasable eng gement with said end piece and permitting relative rotation but not lengthwise u'iovement of said end piece with respect to the barrel when said detent means is in engagement with said end piece.

6. In a pencil, barrel having an end portion, an end piece having a telescopic and rotatable connection with the inner wall id end portion, said barrel end portion having a slot therein, a detent member struck from the material of the wall of said end portion and positioned in said slot and hav lng one end thereof secured to the Wall of llU said end portion, said detent means being in releasable engagement with said end piece and permitting relative rotation but not lengthwise movement of said end piece with respect to the barrel when said detent means is in engagement with said. end piece. and a. sleeve slidable lengthwise with respect to said barrel and adapted to fit over said end portion and cover said detent means.

'7, In a pencil, a barrel having an end portion, an actuating end piece having a telescopic and rotatable connection with the inner wall of said barrel end portion, said inner wall having a first bearing surface adjacent the end thereof next to the extreme end of said end portion and a second. bearing surface spaced from said first surface and inwardly therefrom, said actuating end piece having a first annular shoulder adapted to rotate within said first bearing surface and a second annular shoulder adapted torotate within said second bearing surface, said first and said second surfaces being spaced apart and the wall of said barrel therebetween having a slot therein. and a detent member positioned in said slot and lengthwise thereof wholly within the outer contour of the wall of said barrel and adapted to engage said second annular shoulder.

S. In a pencil, a barrel having an end portion. an actuating end piece having a telescopic and rotatable connection with the inner wall of said barrel end portion, said inner wall having a first bearing surface adjacent the end thereof next to the extreme end of said end portion anc. second bearing surface spaced from said first surface and inwardly therefrom, said actuating end piece having a first annular shoulder adapted to rotate within said first bearing surface and a second annular shoulder adapted to rotate within said second bearing surface, said first and said second annular shoulder being of the same diameter and spaced apart, and the outer surface of said actuating piece between said shoulders being tapered gradually smaller from said first shouldertoward the base of said sec ond shoulder. and adetent member mounted to engage said second shoulder.

9. In a pencil. a barrel having an end portion. an actuating end piece having a telescopic and rotatable connection with the inner wall of said barrel end portion, said inner wall having a first bearing surface adjacent the end thereof next to the extreme end of said end portion and a second bearing surface spaced from said first surface and inwardly therefrom, said actuating end piece having a first annular shoulder adapted to rotate within said first bearing surface and a second annular shoulder adapted to rotate within said second bearing surface, said first and said second annular shoulder being of the same-- diameter and spaced apart, and the outer Surface of said actuating piece between said shoulders being tapered gradually smaller from said first shoulder toward the base of said second shoulder, and a detent member carried by said barrel end portion and normally yieldably extending lengthwise of said barrci and wholly within the outer contour thereof and alongside-of said tapered wall and toward said. second shoulder.

10. In a pencil, a barrel having a main portion and an enlarged portion adjacent one end and a shoulder at the point of-enlargement, said enlarged portion having a slot therein, and a. slida'ble' sleeve on said barrel having a main portion adapted to closely encircle said enlarged portion and having a shoulder closely encircling said main barrel portion and adapted to abut against said shoulder on said barrel.

11. In a pencil, a barrel having a main portion and an enlarged portion having a slot therein, a slidable sleeve on said barrel" having encircle said main barre-l portion adapted to abut against said shoulder on said barrel, a removable end piece on the end of said be rel opposite to said enlarged end and providing a shoulder projecting from said barrel, and an outer casing slidably remov able from said barrel and fitting between and. retained by said shoulder on said end piece and said shoulder on said sleeve.

12. In a pencil, a rigid barre] having a bore lengthwise therein for lead and a clutch member within said barrel in alignment with said bore, said clutch membercomprising a tube split lengthwise-and resiliently expansible to accommodate lead of different sizes, said barrel having a recess therein formed as an enlargement of the bore, and a projecting lug on said clutch tube adapted to fit into said recess and prevent relative rotation of the tube and barrel.

13. In a pencil, a barrel having a writing end with a bore for lead therein, a first shoulder extending from the wall of said barrel centrally and terminating at the lead bore, an extreme forward writing tip end having a round bore therein in alignment with the bore of said barrel, a second shoulder within said tip end adjacent said bore thereof, and a clutch for holding lead positioned within said barrel in alignment with the bore thereof, said clutch comprising a tube split lengthwise throughout its length and expansible resiliently to accommodate lead of different sizes.

M. In. a pencil, a barrel having a writing end with a bore for lead therein, a first shoulder extending from the wall of said barrel centrally and terminating at the lead bore, an extreme forward writing tip end having a round bore therein in alignment a main portion adapted to closely.

with the bore of said barrel, a second shoulder within said tip end adjacent said bore thereof, and a clutch for holding lead positioned between and held by said first and second shoulders and in alignment with said bore, said clutch comprising a tube split lengthwise throughout its length and expansible resiliently to accommodate lead of rilifi'erent sizes.

15. In a pencil, a barrel having a writing end with a bore for lead therein, a first shoulder extending from the wall of said barrel centrally and terminating at the lead bore, an extreme forward writing tip end having a round bore therein in alignment with the bore of said barrel, a second shoulder within said tip end adjacent said bore thereof, and a clutch individually and separately operable independently of said barrel. and said tip for holding lead and positioned between and held by said first and second shoulders and in alignment with said bore and noni'otatable with respect to said bore, said clutch comprising a tube split lengthwise throughout its length and expansible resiliently to accommodate lead of different sizes.

16. In a pencil, a barrel and a removable tip therefor, and a clutch for yieldingly holding lead and located within said tip, said tip having an extreme end provided with a first round bore to closely embrace lead and also a second and larger and relatively longer bore, said clutch being positioned in said second bore against relative rotation with respect thereto.

17. In a pencil, a barrel and a removable tip therefor, and a clutch for yieldingly holding lead and located within said tip, said tip having an extreme end provided with a first round bore to closely embrace lead and also a second and larger and relatively longer bore, said clutch being positioned in said second bore against relative rotation with respect thereto, said clutch comprising a tube split lengthwise and resiliently expansible to accommodate lead different sizes.

18. In a pencil, a barrel, and a removable tip having at one end a threaded sleeve por tion adapted to be brought into threaded connection with the adjacent end portion of said barrel, a first bore extending inwardly within said tip from said threaded end and terminating in a shoulder and continued to the extreme forward end as a second relaliveli; smaller bore. said threaded pcrri u having a recess therein formed as an enlargement of the bore, and a clutch member within said removable tip in alignment with said bore, said clutch member comprising a tube split lengthwise and expansible siliently to accommodate lead of different sizes, and a projecting lug on said clutch tube adapted to fit into said recess and prevent relative rotation of the split tube with respect to the tip.

19. In a pencil, a barrel having a bore therein, an end piece in telescopic rotatable engagement with said barrel and having a bore of the same diameter as the bore of said barrel and in alignment therewith,v and a coiled spring within both bores and capable of slidable endwise movement within both bores.

20. In a pencil, a barrel having a bore therein, an end piece in telescopic rotatable engagement with said barrel and having a bore of the same diameter as the bore of said barrel and in alignment therewith, the walls of the. bores of said barrel and said and piece extending as a substantially continuous cylindrical surface, and a coiled spring positioned within both said bores and capable of a sliding endwise movement within the bore of said end piece and capable of a rotary movement within the bore of said barrel.

In testimony whereof I aflix my signature,

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