US1460481A - Fountain pen - Google Patents

Description

D. A. GLUSHAK FOUNTAIN PEN Y Filed Nov. 9, 1921 Chiot/nu.

July. 3, 1923.

Patented any a, 1923.

. :DAVID A. GLUsHAmor WASHINGTON', nistraicrforfconuivinrii.

i FOUNTAIN PEN;

.- Apipucatcn. ined November a, 1921. seriai No. 514,004.y

T 0 all 'whom t may concern:

Be it known that I, DAVID A. GLUSHAK, a citizen of the United States, residing at VVaShington, in the District of Columbia,

have invented a new and useful Fountain 'Pen, of which the following isa specification.

The object of my invention is to provide a novel self-filling -fountain pen having relatively few parts; to provide a construction in which the inner barrel of the foun- 4 tain also functions as a suction pump member; to provide means for preventing air bubbles in filling the pen; to provide a construction adapted to increase the capacity of a pen of this type; and to provide the novel combination and arrangement of parts hereinafter described. I attain these and other objects of my invention by the mechanism illustrated in the accompanying drawings, in which z- Figure 1 is a` vertical longitudinal section of a pen embodying my preferred con-A struction; l

' Fig. 2 is a detail elevational view of same, partly in section; y y

Fig. 3 is a top plan view of the outer baryrel with the inner barrel removed;

Fig. 9 is a detail elevational view, en-` larged, of the'outer knurled end of the barrel shown in Fig. 8. y

Like numerals designate like parts in each of the several views.

l Referring to the accompanying drawings, I provide an outer barrel 1 havingan interior annular shoulder portion 24 near'y the end of the barrel. I further provide an inner slidable or piston barrelV 3 having an annular shoulder portion 11 near its free end,

as shown in Figs. 1 and 8, 'said portion being adapted to abut against portion-2 of the outer barrel when the inner barrel is withdrawn to the limit of its range of movement. To `allow of the escape of air from the ychamber between the outer and inner barrel as the inner barrel is withdrawn, I

provide the longitudinal channels'S on the interior of the shouldered portion 2 of the outer barrel, as shown in Figs. 3 and 4. I may provide an end sleeve or cap 6 adapted to be screwed-as at 5, to the suitablythreaded portion of the end of the inner barrel, as shown in Figs. 1 and 6; orI may omit sleeve or cap 6 and provide the exposed portion of the inner barrel 3 with a suit ably lrnurled` surface 9 to permit of conveniently withdrawing the barrel. To preventV air bubbles forming and causing the spilling of ink, I prefer to provide a suitable ro'd 7 extending longitudinally of the centrally thereof,

barrel, lapproximately and attached to the interior portion of the end of the barrel.

In operation the pen is filled bydipping the point in ink and graspingeither the end sleeve 6 or the lrnurled Surface 9 of the inner barrel 3 and withdrawing the'inner barrel until its further outward lmovement tion 1 with' the shoulder portion 2 of the outer barrel. rIhe inner barrel functions as a piston or suction element to suck up the ink into the barrel 1. The pen is then reversed and the ink flows into the inner.V

is stopped by the contact of its shoulder porbarrel 3. The plunger is then pushed back to its original position. In the form. of the invention illustrated in Fig. 1,' several of the'suction or pumping operations are per formed to till the pen, but the penhas a- `relatively large capacity. In the form of the invention illustrated in Fig. 43, a lsingle operation of the inner barrel 3 suiiices to fill the pen. Air in the space between the barrels finds a way of escape through the small channels t3Y in shoulder 2. The shoulder 4 fits snugly on or against the surface of the outer barrel. The depending rod 7v on'tli'e inner barrel functions to-assist the ink in falling down the barrel, prevents `air bubbles and counteracts the effectbf capillary attraction. proximately the saine 'length as the inner barrel 3 but may be slightly-different from it in length. n

Vhat I claim is1- n 1.` In a fountain pen, the combination o an outer barrel having an annular shoulder projecting interiorly near its end,v an inner barrel slidably mounted in the outer barrel,

This rod,l is yofV apsaid inner barrel having anannular shoul.

der near its inner1 end projecting outwardly and adapted to abut against the shoulder of the outer barrel, means for the escape of air from the Space between the barrels on the outward'stroke of the inner barrela. rod afHXed to the inner surface of the end of the inner barrel and extending longitudinally of said barrel for approximately the entire length and spaced from the Walls 10 of the barrel.

2. In a fountain pen, the combination of an outer barrel, an inner barrel Slidably mounted in the outer barrel and having a small portion thereof, 'projecting beyond the outer barrel, means for limiting the outward movement of the inner barrel, and a rod extending longitudinally of the inner barrel for approximately the length thereofE to prevent the formation of air buloles.

DAVID A. GLUSHAK.

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