US2119645A - Fountain pen - Google Patents

Description

June 7, 1938. E, Q PEARSON 2,119,645 Y FOUNTAIN PEN Filed June 29, 1936 lvwemtoz 33M ttm Y Patented June 7, 1938 UNITED vsfrii'riis' PATENT OFFICEY FOUNTAIN PEN Eric G. Pearson, Roselle, N. J.

Application June 29, 1936, Serial'No. 87,982

4 Claims.

This invention relates to fountain pens and it has, as its primary object, to provide improved means for securing the ink-sack to the so-calledV section which holds the pen point and securing the section in the barrel.v

As heretofore constructed, the section has been formed with a shank of two diameters adapted to be inserted into the barrel. VThe open end of the ink-sack was fitted to, and cemented upon, the inner andsmaller diameter while the larger diameter was frictionally secured in the open end of the barrel.

That prior construction has not been entirely satisfactory, due to the fact that, under the screwing action of the pen cap, thesection would sometimes be turned relative to the barrel. Inasmuch as the ink-sackwas cemented to the section, one end thereof also would be turned. It frequently happened that the ink-sack, would eitherl adhere to the inner surface of the barrel or catch upon the filler mechanism, with the result that the turning of the section, and the end of the sack secured thereto, would cause twisting of the ink-sack. This would prevent the ink from f flowing and, therefore, render the pen useless.

This invention has effectively overcome that difficulty by providing an improved and simplied construction which prevents relative rotation between the section and the barrel, and renders the cementing of the bag to the section unnecessary. Y

A drawing illustrating a preferred form of this invention, and several modifications thereof, has been annexed as a part of this disclosure, and in such drawing Figure 1 is a siderelevation, partly in section, of a fountain pen, embodying the preferred form of the invention.

Figure 2 is a disassembled side View of various elements shown in Figure 1.

Figure 3 is an end view of a split sack-retaining sleeve later to be described.

Figure 4 is a detail view of a modified form of point-supporting section. l

' Figure 5 is an enlarged detail sectional View disclosing a modification of the construction shown in Figure l, and embodying the pointsupporting section shown in Figure 4,

Figures 6 and 7 are side and end views, respectively, of the sack-retaining sleeve embodied in the construction disclosed in Figure 5.

Figures 8 and 9 are side and end views, respectively, of a second modified form of sack-retaining sleeve,V and Figure 10 is a view similar to Figure 8 showing the sleeve constricted.

for

(Cl. 1Z0-42) Referring more specifically to the drawing, and first to the construction shown in Figures 1, 2 and 3, the invention is disclosed as embodied in a fountain pen comprising abarrel l, a section 2 which carries a feed 3 `and pen-point 4, and Va collapsible rubber ink-sack 5. One end of the' ink-sack is closed and the free open end 5a thereof is stretched vand fitted upon thereduced inner end 2EL of the section 2. In this construction the pcrtion of the section which projects into the barrel is of uniform diameter and is shorterthan in prior constructions while the ink-sack has approximately twice the bearing thereon.

After the open end of the saclf:Y has been stretched and placed upon the end 22L ofthe section 2 a split sleeve 6 is placed thereabout. The bagc, sleeve S and end 2`a are then inserted within the open end of the' barrel as shown in Figure 1. The parts are so proportioned thaty their insertion in the barrelA causes the splitV sleevel 5 to be constricted about 4the end portion of the sack,` thereby forming an in kftight joint between the sack and the portion 2a of the pointsupporting section, without theuse of cement or the'like. The sleeve 6 also forms a tightY joint with the inner Wall of the barrel I. Any tendency of the section 2 to turn causes the sleeve 6 to open slightly whereupon the edges 6a of the slot 6b more securely grip the inner surface of the barrel. Thus, through the action of the sleeve 6, the sack 5 is securely fastened to the section 2 and the section is locked against turning in the barrel.

It will readily be perceived that not only does this construction securely hold the parts against relative movement but also that the parts do not require the precision in manufacture required in prior constructions in which the section was fitted directly within the bore of the barrel. This is true because of the fact that the rubber sack 5 may readily be compressed about .005 of anV inch, thus giving considerable tolerance as compared with prior constructions in which the section had to be fitted in the barrel with great precision. Y

In such prior constructions, if the Section was the least bit too small it would turn in the barrel. If it was slightly too large insertion thereof vinto the barrel would cause one of two defects, it would either split the barrel or it would expand the barrel so that the cap would not fit thereon.

The present invention obviates both of these defects and permits the parts to bel completely` `machined before they are assembled with the assurancethat they will t after assembly.

In the modication shown in 4ligures 4 to '7,

thereduced end 'la of the section 1, which corf respondsrto the section 2 of Figurek 1, is formed,

intermediate Vits ends', with an annular groove 1b and the split sack-retaining sleeve 8 is provided with a complementa] annular depression 8a adapted, when theV parts are assembled, toV force the sack 5 into the groove 1b as shown Virnrlfigure 5. This securelyy locksY the parts against axial i movement and facilitates withdrawing of the parts from the barrel, when necessary. Y

Y Figures 8 vand 9 show still anotherform of split sack-retaining sleeve. In this form the sleeve 9 is split diagonally as indicated at 9X, instead'ofv lengthwise as in Figure 2. This construction permits a materially greater degree of compression for a given width of slot, as the sleeve may be compressed, not only until the edges Si@L and 9b of the slot abut,y butfurther, as indicated in Figure 1D, the parts moving axially as well as Vcircumferentially4 after the opposite walls 9a and 9b of the Vslot have been brought into contact. f

From the foregoing it will be apparent that I have provided an improved and simplified'means for securinglan ink-sackjto the point-supporting section ofafountain (pen, and for securing the "sectionwithinl the barreLJIt will also be percei'ved that this construction may be `more readily assembled than prior'constructons, that no cementingof the sack is required, and that, when assembled, the undesirable twisting of the sec-V tion andY sackrrelative to the barrelwill be obvi- Furthermore it will be apparent that, as 'the portion of the section which is inserted into the barrel is materially shorter than as heretofore constructed, a correspondingly longer ink-sack may loe used, Vthereby proportionately increasing l the inklcapacity of the pen.v

VHavingfrthus describedr the inventionV what I claim anddesre to secure by Letters Patent of the United States is: n Y.

M 1. A fountain penr comprising a barrel; a pointsupporting section having a reduced portion, of

uniform diameter, arranged within said barrel;

an ink-sack fitted upon said reduced portion; and

Va diagonally split member surrounding said reduced portion and the sack thereabout and adapted to be compressed by insertion withinrsaid barrelto` clamp said sack upon said reduced portion,`said split member also serving to frictionally retain said section in said barrel.V

V2.A A fountain pen comprising a barrel; a pointsupporting section having a reduced portion located within said barrel; an ink-sackV having one Y end fitted upon said portion; Vand a sleeve, splitV in Y the general direction of its length but at an angle to its axis, surrounding said end of the sack and the reduced portionV of said section, said sleeve frictionally engaging the inner surface of said barrel and serving to clamp said bag to said section and to prevent rotation of said seotionin said barrel.

3. Ak fountain pen comprising na barrel;Y a point.-Y

supporting section having a portion arranged within said barrel, saiolportion being provided,

intermediate its ends, with agroove; an ink-sackV having ione rend fitted-upon said portion; and a compressible clamping sleeve tightly fitted within said barrel kand surroundingV said sack and Ypo r-4 tion, said sleeve having a depression comple' mental to said Vgroove andgadapted when compressed by said barrelto force a portion of said sackY into saidgroove, Vthereby to secure said sec.- tion and sack together, said sleeve also serving to frictionally secure said section in said barrel.`

4. A fountain pen comprising a barrel; a point'- supporting section having a portionV arranged.y

within saidkbarrel; an ink-sack having an end fitted Vupon saidportion; Vand a diagonally split compressible sleeve surrounding said portion and the end of said sack fitted thereon, said split ysleeve normally being of larger diameter than the diameter of the bore" in said barrel but being adaptedto be constricted to an extent greater than'the space between thek walls of the split therein and to be insertedinto said. bore, the

constrition'of said vsleeve serving to clamp said 'n sack to Vsaid point-supporting section.Y

' Y ERIC G. PEARSON.

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