US2780203A - Fountain drawing pen - Google Patents

Description

Feb. 5, 1957 J. G. MoRAN r-:TAL

FOUNTAIN DRAWING PEN 2 Sheets-Sheet l Filed 001'.. 27, 1952 Ivz/erzrz a'aa ralf. L maa/0. Josep .7ar'aw.

- Feb. 5, 1957 J. G. MoRAN ET AL 2,780,203

FOUNTAIN DRAWING PEN Filed Oct. 27, 1952 2 Sheets-Sheet 2 3 La/e2? fors.' cazfd E lacado mztfosej 6:' l/ofajz FOUNTAIN DRAWING PEN Joseph G. Moran and Richard E. Lucado, Chicago, Ill.

Application October 27, 1952, Serial No. 316,962

7 Claims. (Cl, 1Z0-47) This invention pertains to drafting or drawing pens and more particularly to such a pen equipped with a reservoir for a more or less continuous supply of ink and mechanism whereby the pen user may control the flow of ink from the reservoir to the pen or pen blade points or nibs.

One of the principal objects of the invention is to provide a safe and sure arrangement whereby ink from a reservoir in the pen may be positively fed to the pen blade points in such quantity and at such time as desired and otherwise under the complete control and at the will of the user.

Another principal object is to provide a reservoir or fountain pen of such construction that the reservoir may be quickly, easily and safely relled and such that the danger of accidental flow or leakage of ink from the pen is reduced to a minimum 4if not completely eliminated, the construction also providing for easy cleaning.

Still another important object is to provide a safe and positive means for depositing ink on or between the pen blade points or nibs, the delivery means providing a closed channel to the place or area where the ink must be delivered or deposited for effective use thereby also to reduce premature drying of the ink.

Many other objects as well as the advantages and uses of the invention will become apparent after reading the following description and claims and after viewing the drawings in which: t

Fig. l is a view partly in longitudinal section of a ruling or drafting pen embodying a presently preferred form of the invention, the parts being illustrated as they appear at the time the pen reservoir has been emptied and the pen is being readied for lling;

Fig. 2 is a view in longitudinal section of the same pen, the section being taken at right angles to or 90 displaced from the section of Fig. l and illustrating the parts in positions assumed after a portion of the ink has been displaced from the reservoir;

Fig. 3 is a large scale longitudinal sectional v-iew corresponding to that of Fig. 1 but showing the parts in their positions with the plunger advanced part way toward the discharge end; and

Figs. 4 and 5, respectively, are transverse sectional views taken substantially along the section lines 4 4 and 5 5 of Fig. 3 looking in the direction of the arrows.

In the embodiment illustrated the pen has a two part cylindrical body composed of a tubular barrel member 3 providing an ink reservoir the internal bore or wall 4 of which is cylindrical and a housing 5 coaxial with the barrel 3 and removably secured thereto as by threads 6. An internal circumferentially extending por-tion 7 of housing 5 provides a shoulder abutment 8 at one side for the adjacent end of barrel 3 and a shoulder abutment 9 at the opposite side for the forward end of a coiled spring 10. The internal siu'face or bore of portion 7 is cylindrical and in mating registry with the bore 4 of barrel 3 for the reception of a cylindrical plunger generally designatedl 11 which is mounted in these bores with a sliding mired States Patent O Mice tit for movements back and forth between ends of the reservoir provided by the barrel 3. At its forward yend the plunger V11 may be provided with a suitable packing ring or circular gasket 12 held in place by a cap member 13 having threaded connection with a threaded boss 14 on that end of the plunger, thereby to maintain a liquid tight sliding t between the plunger and the reservoir walls.

The rear end of plunger 11 has an outwardly directed circumferential ange 15 which not only provides an abutment for the rearward end of spring but also serves as a guide or bearing for the plunger since it has sliding .engagement with the cylindrical bore 16 of housing 5 as the plunger is moved back and forth in the barrel 3. The spring 10 is conned in the circumferential recess formed between the outer surface of plunger 11 and the bore 16 of the housing 5, rests at its ends against the abutment surfaces or shoulders formed by portion 7 and ange and normally urges the plunger out of the reservoir or toward the right viewing Figs. 1 and 2, Fig. l illustrating the positions of these parts when the plunger is at its extreme rearward position. A slot 17 extends through the plunger 11 from side to side on a diameter and is of a length between its opposite rounded ends equal to the distance over which the plunger is to travel. A pin 18 extending through the opposite sides of housing 5 and through the slot 17 and releasably or removably secured to the housing, not only acts as a stop to limit the plunger travel in each direction but prevents the plunger from rotating within the barrel and housing.

The rear end of the plunger is also counter-bored and `tapped as indicated at 19 for mating engagement with a thread 20 on a stem 21. If desired a pin 22 may extend into transversely drilled registering holes in the plunger and stem to provide added security against rotation or displacement of stem 21 relative to plunger 11. The rear end of stem 21 may be equipped with a cap 23 for ease of linger manipulation. Stem 21 passes through and normally has threaded engagement with a thread in a split nut the complementary halves of which are designated 24, 24. The split nut is mounted in the rear end of the housing 5 for rotation relative thereto and to such end has a circumferential groove 25 (one half in each half of the nut) in which a two-part or split collar 26 is rotatably mounted and normally retained by an embracing spring ring 27. The split collar 26 has threaded con nection, as indicated at 28, with the rear end of housing 5 and has a circumferentially extending radial flange by which it may be gripped whenever lit is desirable to unscrew it from the housing thereby to remove the split nut. Between the inner or forward end of the split nut and a shoulder 29 in housing 5 is a washer 30.

The halves of the split nut have complementary internal recesses 31 for the reception of a spring ring 32 which normally tends to spread the nut halves apart to the positions shown lin Fig. 1 while projecting port-ions 33 carry complementary parts ot' an external thread engageable by a mating internal thread in a cap 34 which when in place holds the split nut halves together. When the split nut halves are held together by the cap 34 or otherwise, the internal thread thereof is engaged with the mating thread of the stem 21 so that upon relative rotation between the split nut and stem, the stem will be caused -to travel in one axial direction or the other and, in turn,

- will cause the plunger to be moved in the barrel in a corresponding direction. Of course upon release of the split nut halves 24, 24', it will be spread to the position shown in Fig. 1, thereby releasing the thread of stem 21 whereupon spring 10 will move the plunger to the right to the limit of its path of travel in that direction as determined by the engagement of pin 13 with the forward or left hand end of slot 17, as shown in Fig. 1.

The forward end of barrel 4 is counter-bored and mouth part 35 of a needle outlet tube 36 and the adjacent reduced and threaded end of a ferrule 37. Internal threads at the opposite end of ferrule 37 engage external threads on the base 38 of the pen proper the blades of which, designated 39, 39', are integral with the base 38, The needle tuber36 passes through an aperture centrally located through the base 38 and has its outer or delivery end disposed just back of the working tips of the blades at approximately the normal place of application of ink when ink is applied by the usual quill. As usual, one blade, that designated 39, is relatively stationary while the other, 39', is resilient over a portion of,` its length for adjustment toward and from blade 39 through the screw and clamp indicated at 4i).

While the operation of the pen to feed inkA from the reservoir and to refill theV reservoir after exhaustion of the ink therefrom are more or less obvious, they will be briefly described. Rotation of the split nut 24, 24 and cap 34 together relative to the barrel will cause the stem 21 to move the plunger 11 in one direction or the other depending upon the direction of rotation of cap and split nut and whether the stem thread is left or right hand. Of course, the arrangement will be such that the operator or user will be able readily to determine the proper direction of rotation to effect ink displacement. Thel advance of the plunger into the reservoir displaces the inl; therefrom into the needle tube and thence to the space between the pen blades. If for some reason, such as for refilling the reservoir, the cap 34 is removed and the split nut permitted to spread or open, the stem thread will be disengaged from the split nut'whereupon the spring will force the plunger out of the reservoir and the stem back as indicated in Fig. l. In order now to refill the reservoir it is preferable to remove the blades by unscrewing the base 38 from ferrule 37 and to insert the needle tube point in the bottle or other ink supply the plunger then being or previously having been depressed into the reservoir by pressing the finger against cap 23 to urge the stem 21 through the spread halves of the split nut. The stem is then released and the upward or outward movement of the plunger from the reservoir will draw ink into the reservoir through the needle tube whereupon the split nut halves may bepressed together, the cap 34 reassembled in hplace and the pen blades reconnected with the ferrule 37.

Many variations in construction and arrangement of the form described may be effected and the invention may be embodied in other formsas will be appreciated. Accordingly we desire that the invention be considered as limited only by its spirit and the scope of the appended claims.

We claim:

1. In a fountain pen a barrel providing a cylindrical reservoir chamber for ink and having an ink outlet at one end of the reservoir chamber, a plunger having an end removably mounted in the said chamber and movable therein axially thereof toward said outlet end for expelling ink through said outlet, means normally urging said plunger away from said outlet end toward the opposite end of the chamber, an externally threaded stem non-rotatably sec-ured to said plunger for movement therewith, means for securing said stem against rotation relative to said barrel, an internally threaded split nut secured to said barrel for rotation relative thereto and normally held against displacement'therefrom, the internal thread of said nut mating with saidthread of said stem, means normally tending to open said split nut to effect disengagement of the thread thereof from the thread of said stern, and releasable means for retaining the said nut thread in operative engagement with said stem thread.

2. In a fountain pen a barrel providing a cylindrical reservoir chamber for ink and having an ink outlet at one end of the reservoir chamber, a plunger disposed in the said chamber and slidably movable therein axially thereoftowardsaid outlet end for expelling ink through said outlet, spring means normally urging said plunger axially of the chamber away from said outlet end toward the opposite end thereof, an externally threaded stem non-rotatably connected with said plunger for movements therewith, means for securing said plunger against rotation relative to said barrel, an internally threaded split nut secured relative to said barrel for rotation relative thereto and normally held against displacement longitudinally thereof, the internal thread of said nut mating with said thread of said stem, means normally tending to open Said split nut to effect disengagement of the thread thereof from the thread of said stem, and releasable means for retaining the said nut thread in operative engagement with said stem thread.

3. In a fountain pen a barrel providing a reservoir chamber for ink and having an ink outlet at one end of the reservoir chamber, a plunger conformably fitting within said chamber and movable therein axially thereof toward said outlet endl for expelling ink through said outlet, means normally urging said plunger away from said outlet end toward the opposite end `of the chamber, an externally/,threaded stem connected with said plunger for movements therewith axially of said chamber, means for securing said stem against rotation relative to said barrel, an internally threaded split nut secured to said barrel for rotation relative thereto and against movements axially thereof, the internal thread of said nut mating with said thread of said stem, means normally tending to open said split nut to effect disengagement of the thread thereof from the thread to said stern, and releasable means for retaining the said nut thread in operative engagement with said stem thread.

4. In a fountain pen a barrel providing a reservoir chamber for ink and having an ink outlet at one end of the reservoir chamber, a plunger conformably fitting within said chamber and movable therein axially thereof toward. said outlet end for expelling ink through said outlet, spring means reacting between said barrel and plunger normally urging said plunger away from said outlet end toward the opposite end of the chamber, an externally threaded stern connected with said plunger for movements therewith axially of said chamber, means for securing said stern and plunger against rotation relative to said barrel, an internally threaded split nut secured to said barrel for rotation relative thereto and normally against displacement therefrom, the internal thread of said nut mating with said thread of said stem, means normally tending to open said split nut to effect disengagement of the thread thereof from the thread of said stem, and releasable means for retaining the said nut thread in operative engagement with said stem thread.

5. In a fountain pen, means providing a cylindrical reservoir having an outlet at one end, a plunger slidably mounted in said reservoir for reciprocal movements axially thereof, spring means reacting between said reservoir means and plunger and constantly urging said plunger away from the outlet end and toward the opposite end of the reservoir, a threaded member secured to said plunger, means carried by and rotatable relative to said reservoir means and releasably engaged with the thread of said threaded member for advancing said plunger toward said outlet end against the action of said spring, and manually operable means for releasing said rotatable means from the thread of said threaded member whereby said plunger' may be moved away from said outlet end by the action of said spring.

6. In a fountain pen, a hollow barrel providing an ink reservoir and having a discharge outlet at one end, a plunger mounted in said barrel for coaxial reciprocation therein, spring means constantly urging said plunger away from the discharge end toward the opposite end of said barrel, means including interengageable and disengageable threaded members one of which is carried by the plunger and the other of which is carried by the barrel for feeding said plunger toward the discharge end of said barrel against the action of said spring, and manually operable means for selectively engaging and disengaging the threads of said members. l

7. In a fountain pen, a hollow barrel providing an ink reservoir and having an outlet therefrom at one end, a plunger slidably but non-rotatably mounted in said barrel for coaxial reciprocation therein, spring means constantly urging said plunger toward the opposite end of said barrel, a threaded element carried by said plunger, a threaded element carried by said barrel and releasably engageable with and rotatable relative to the threaded 5 bers.

References Cited in the tile of this patent UNITED STATES PATENTS OConnor Nov. 22, 1949 FOREIGN PATENTS 169,423 Great Britain May 8, 1922

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