US1494424A - Magazine pencil - Google Patents

Description

C. N. JOHNSON MAGAZINE PENCIL Filed Dec. 31.

May 20 1924.

Patented May 20, 1924.

UNITED STATES y 1,494,424 PATENT OFFICE.

CLIFFORD N. JOHNSON, OF TOLEDO, OHIO, ASSIGNOR T0 THE CONKLIN PEN MANU- FACTURING" COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO.

IAGAZlNE PENCIL.

Application nled December 31, 1921. Serial No. 526,182.

To all whom it may concern Beit known that I, CLIFFORD N. J oHNsoN, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have made an Invention Appertaining to a Ma azine Pencil; and I do hereby declare the ollowin to be a full, clear, andexact description o the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.A

This invention relates to pencils, and particularly to those of the magazine type employing a lead propelling and repelling mechanism including -a helical tube and a longitudinal slotted tube fitted one within the other.

The primary object of the invention is the provision of a simple, strong, durable and inex ensive pencil of the character described whic is capable of having the parts thereof easily and quickly. assembled and secured together in a manner to facilitate a' separation thereof to facilitate re air or inspection of the interior arts, there y enhancing the practicability o? pencils of this character.

A further object of the invention, .is to simplify, cheapen and strengthen pencils of this class by making the fluted magazine tube and the longitudinally slotted tube forming a part of the lead propelling and repelling mechanism in a single piece, which is preferably formed by extruding metal in cold formfrom a sha ing die.

The invention is ully described in the following specification, and while 1 n its broader aspect it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in which,-

Fi 1 is a side elevation of. a pencil embodying'the invention. Fig. 2 is an enlarged central longitudinal section thereof. Fig. 3 is aside elevation of the spirally slotted tube of the encil, with a tip engaging collar mounte on its forward end. Fig. 4 is a side elevation of the internal tubes of the encil in assembled relationwith a part broken away. Fig. 5 is a cross-section on the line 5-5 in Fig. 2, and Fig. 6 is a crosssection on the line 6 6 in Fig. 4.

Referring to the drawings, 1 and 2 re- .inner ends on the sleeve.

spectively designate the barrel and tip members of a pencil embodying the invention, 3

-a small helically slotted tube which is fixed at its forward end to the interior of the tip member 2'and extends rearwardly therefrom centrally through the barrel member to the rear end thereof, and 4 a longitudinally slotted tube which is mounted for free rotary -moveinents on the tube 3 extending from the forward shouldered end of the tube 3 to a point adjacent the rear end thereof.

The longitudinally slotted tube 4 is provided in equidistantly spaced relation therearound with a plurality of radially projecting flutes or ribs 5, which extend longitudinal of the tube from a point near its rear end to a point near its forward end, the tubular portion of the tube being extended slightly beyond the rear end of the flutes to Aform a threaded nip le 6 and being extended slightly beyond) the forward end of the flutes to form the nipple or bearing extension 7. The flutes or ribs 5 on the tube 4 have a tight fit Within the barrel l, thereby serving to frictionally retain the barrel in assembled engagement therewith. The fluted tube 4 cooperates with the barrel to form a series of lead receiving pockets 8 within the latter, said pockets, in the present instance, being three in number.

The forward end of the tube 3 is formed with a taper to fit the interior taper of the tip 2 and is rigidly secured to the tip by solder or in any other suitable manner. The inner end of the tip 2 is mounted on a sleeve 9, which may be journaled for f'ree turning movements on the nipple or bearing extension 7 at the forward endfof the tube 4. The forward or inner end of the barrel preferably laps the sleeve 9 and has a turning fit thereon. If desired, both the barrel 1 and tip 2 may have a turning lit at their A ferrule member l() threads at its inner end on the nipple 6 of the tube 4 and has a turning lit in the outer end of the barrel 1. The ferrule l() extends beyond the outer end of the barrel and is adapted to have a cap 11 removably mounted thereon to enclose an erasure rubber 12 which is mounted in the outer end of the ferrule.

A lead gripping sleeve 13 is mounted to have its forward end receive and frictionally grip the inner or rear end of a lead 14 mounted on the pencil so that the lead is caused to have reciprocatory movements therewith. The sleeve 13 has a.. stud 15 projecting laterally from its rear end throu h the helical slot 16 of the tube 3 and into t e longitudinal slot 17 of the tube 4 so that a turning of one tube relative to the other will cause the sleeve 13 to move 1n one direction or the other l0n `tudinally of the tube as is Well understood 1n the art. A lead ejecti-ng stem 18 projects into therear end of the sleeve 13 and has its outer end angled to project through the helical slot 16 and into the longitudinal slot 17 so that the sleeve 13 and stem will travel together 1ongitudinally of the tubes upon a relative turning thereof. The longitudinal slot 17 is provided at its forward end with a lateral extension 19 into which the stud 15 of the clutch sleeve 13 passes when it has reached the limit of its forward movement, thereby preventing it from having further forward movement. While the stem 18 continues its forward movement to eject the lead from the sleeve. Nothing new is claimed for this method of propelling and retracting the lead, as it is old in the arr.

The helically slotted tube 3 has its forward end tapered, as shown at 20. to provide it with an extended surface for feeding into the taper of the tip 2, and iu order to facilitate a firm soldering of the tip to the tube 3, a tapered collar 21 is mounted on the forward end portion ofthe tube adjai cent to the taper 2O thereof and adapted to fit the ta er of the tip, thereby providing more sur ace for soldering contact with the than would otherwise be present. The

tullie 3 has spurs 22 struck from its sides near the taper 20 and these enter notches in the forward end of the collar 21 to retain the collar against turning relative to the tube. The rear end of the 'collar 21 forms a shoulder for abutting against the forward end of the tube 4 which is stationary with respect to the barrel v1. The helical slot 16 in the tube 3 extends from the collar 21 com` pletely to the rear of the tube. When the tube 4 has been mounted on the tube 3 the tubes are retained together by a headed screw 23, which is threaded into the rear end of the helical tube 3*'and has its head of sufficient size to lap the rear end of the tube 4. thereby preventing one tube from being withdrawn from the other. When the two tubes are assembled, with the tube 4 in-v abutment at its forward end with the collar 21, the rear end of the inner tube 3 will terminate slightly short of the adjacent end of the tube 4, as shown in Fig. 4. A turning of the screw 23 into the tube 3 with its head in contact with the rear end of the tube 4 causes a longitudinal tension to be strength and rigidity applied to the helical tube 3, which effects a' the helical tube 3 or to loosen the same, de 80 pending on the direction of relative turning of the tubes. This is not the case, however, as the stretchin of the helical -tube causes it to have a loc ring action` on the threads of the screw23 andv to retain it in adjusted position. 4

In making pencils of this character, it has heretofore been the practice vto provide a magazine tube separate from the slotted tube and enclosing the same, the magazine tube being of corrugated form to providey a plurality of lead receiving spaces between it and the pencil barrel. In the the longitudinal tube are combined in one, flutes or ribs tube being integral therewith and terminating short of its ends to provide nipples'or bearing extensions at both ends of the tube, the tube 4 is preferably made in this form truded through a die in` the form of a fluted by applying pressure to a cold block or bar v of metal and causing the metal to be ex tube .'after which the flutes or ribs 5 are milled off at the ends of the tube to formy the Atubular end extensions 6 and'7. The tube is also milled to form the slotv 17,-19 therein. This provides a tube which is of greater than the combined slotted and magazine tubes heretofore used, and it materially simplifies the manufacture of such tubes and lessens the cost'of same.

The barrel 1 is preferably secured in as,` sembled position on the fluted tube 4 by extending the inner end of the spring 24, which carries the pocket engagingclip 25, through a side opening in the barrel and thence for a distance longitudinally -of the barrel between it and one of the ribs 5 of the tube 4 and providing its free end with an angled tail-piece 26 for engaging in a notch 27 in the of locking the parts together bers 13 and 18 therein, the collar 9 being coacting rib 5. This method D is disclosed, and clalmed 1n my copending application mounted on the end extension 7 of the tube 4 before the mounting of such tube on the tube 3. The tip member 2 is then placed over the conical end portion 20, 21 of the tube 3 and heat is applied thereto around sired distance or until the inner angled end of the clip spring 24, which was previously inserted into position in the barrel has snapped into locking engagement with thel notch 27 in the coacting rib 5. The ferrule 10 is then threaded onto the end 6 of the tube 4. The screw 23 may be adjusted either before'or after the mounting of the barrel 1 on the tube 4, so as to apply the desired tension on the helical tube 3 to retain it in yielding assembled relation to the tube 4. It 1s apparent that the different parts of the pencil may be easily and quickly assembled Without the use of any solder except at the point of connecting the tip 2 to the forward end of the helical tube 3, thereby facilitating manufacture and also the separat-ion of the parts for repair or inspection.

I wish it understood that my invention is not limited to any specific construction, arrangement or form of the parts, as it is capable of embodiment in numerous forms without departing from the spirit of the claims.

Having thus described my invention, what I claim as new` and desire to secure by Letters Patent, is,-

1. In a pencil of the class described, a helical tube, a tip fixed to the forward end ofthe tube, a longitudinally slotted tube rotatably mounted on the helical tube and having integral radial ribs extending longitudinally thereof, means coacting with the two tubes to retain them in assembled relation, lead actuating means disposed within the tubes in engagement with the slots thereof and actuated by a relative turning of the tubes, and a barrel mounted on the ribs of the longitudinally slotted tube.

2. In a pencil of the class described, inner and outer relatively rotatable slotted tubes. a tip and a barrel fixed to the said tubes respectively, a lead actuating mechanism enclosed within the tubes and operated by a relative turning thereof, the outer slotted tube having integral longitudinally extending ribs projecting outward therefrom and supporting the barrel, and means coacting with the tubes to retain them in assembled relation.

3. In a pencil of the class described, an inner helical tube having a shouldered for- Ward end, an outer longitudinally slotted tube rotatably mounted on the helical tube in end abutment with the shouldered end thereof, the outer tube having inte ral longitudinally extending ribs projecting outward therefrom in circumferentially spaced relation and terminating short of the ends of the tube to form tubular end extensions, a collar mounted on the end extension adjacent to the shouldered end of the helical tube, means coacting with the rear ends of the two tubes to retain the tubes in' assembled relation, a tip member fixed to the shouldered end portion of the helical tube and at its rear end embracing the collar, a barrel mounted on the ribs of the outer tube for turning movements therewith and extending at its forward end adjacent to the tip, and a member extending into the rear end of the barrel and threaded on the rear end extension of the outer tube, and lead actuating means mounted within the tubes and actuated by relative turning movements thereof.

4. In a pencil of the class described, a helically slotted tube and a longitudinally slotted tube mounted one on the other for relative turning movements and having shouldered coaction at one end, a member coacting with the opposite ends of the tubes in threaded engagement with the helical tube and in end thrust engagement with the longitudinally slotted tube to exert a stretching tension on the helically slotted tube, and lead actuating means enclosed within the tubes and operated by a relative turning thereof.

5. In a pencil of the class described, a helically slotted tube having a shouldered forward end, a longitudinally slotted tube rotatably mounted on the helical tube in end thrust engagement with its shoulder and normally extending at its opposite end beyond the adjacent end of the helical tube, a screw threaded into the end of the helical tube opposed to its shoulder and havin a head in end thrust coaction With the a jacent end of the other tube to enable the screw to exert a longitudinal stretching tension on the helical tube to retain the parts in assembled relation.

6. In a pencil of the class described, a helically slotted tube lhavingl a shoulder at its forward end and having its slot extending to and opening without the opposite end thereof. a longitudinally slotted tube mounted on the helical tube in end thrust engagement at its forward end with the helical tube shoulder, the rear end of the helical tube normally terminating short of the ad jacent end of the other tube, a screw threaded into the rear end of the helical tube with its head in end thrust contact with the rear end of the other tube to apply a longitudinal stretching tension on the helical tube, and lead actuating means enclosed within the tubes and operated by a relative turning thereof.

7. In a pencil of the class described, a helically slotted tube, a thrust collar mounted on the forward end of the tube and cooperating to form a prolonged tapered surface, a longitudinally slotted tube rotatably therefrom in oircumferentially spaced rela-` tion and terminating short of the ends of the outer tubes to provide tubular extensions on the ends of such tube, a second collar mounted on the forward end extension of the outer tube, a tapered tip ittin on and fixed to the tapered surfaces of the ielical tube and first collar and extending at its rear end over and having a bearing on the second collar, a barrel fixedly mounted on the ribs of the outer tube and cooperating With the outer tube to form a plurality of lead receiving pockets around the axis of the pencil, means cooperating' with therear ends of the inner and outer tubes to retain them in assembled relation, a member fitting into the rear end of the barrel in closin relation to the lead receiving pockets amil threading on to the rear end extension of the outer tube, and lead actuating means projecting outwardly therefrom and co- 1 extensive in length therewith, millin(r soli' the end portions of the ribs to provi e tubular end extensions on the tube and forming a longitudinally extending slot inthe tube between a pair of ribs.

9. The method of forming a longitudinally slotted and fiuted tube for use in magazine pencils of the class described,

which consists in extruding metal under pressure in cold form from a die to form a tube of predetermined length having a plurality of longitudinally extending integral ribs projecting outwardly therefrom, and then forming a longitudinally extending slot in the tube between the pair of` ribs.

In testimony whereof I have hereunto signed my name to this specification.

CLIFFORD N. JOHNSON.y

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