US756778A - Self-filling fountain-pen. - Google Patents

Description

No. 756,778.- PATENTED APR. 5, 1904. R. GONK'LIN.

SELII FILLING FOUNTAIN PEN.

APPLmATIoN FILED MAB. 4. 1904.

H0 MODEL.

INVENTOR Allornej Tn: Nonms perus co. vnmxumo., wAsmNoYoN. u c.

Patented April 5, 1904.

UNITED STATES PATENT OFFICE.

ROY CONKLIN, OF TOLEDO, OHIO.

SELF-FILLING FOUNTAIN-PENl SPECIFICATION formingpart of Letters Patent No. 756,778, dated April 5, 1904.

Application iiled March 4, 1904:. Serial No. 196,562. (No model.)

To a/ZZ whom/ it may concern.:

Be it known that I, ROY CoNkLIN, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented new and useful Improvements in Self- Filling Fountain-Pens, of which the following is a specification. l

This invention relates to fountain-pens; and its object is to improve the construction of that class of fountain-pens known as selffilling -such, for example, as the pen covered by my prior patent, No. 685,258, dated October 29, 1901. In that pen the ink-reservoir consists of a slender rubber bag inclosed in a rigid barrel or holder and communicating at one end with the pen-section. bar is laid along one side of the bag between it and the barrel, and a rib on the bar projects out through a slot in the barrel, so that by pressing on the rib the bag can be compressed. If when so compressed the pen is dipped into a supply of ink and the pressure on the rib is then relieved, the resiliency of the rubber bag causes it to resume its former expanded shape, and in so doing it sucks itself full of ink. A

locking-ring passing through a slot in the rib I is then turned to prevent accidental inward movement of the rib and presser-bar until it is desired to refill the pen.

The presentinvention consists in anew locking device for the presser-bar.

It comprises a tubular member rotatable on the outside 'of the barrel or holder, both of said parts being provided with interoperating portions which effect a longitudinal movement of the tubular member simultaneously with its rotation and cause it to approach toward orrecede from the rib on the presserbar. By locating the rotatablemember quite near to one end of therib it will when rotated in one direction clamp the rib tightly between its adjacent edge and the opposite end of the slot in the barrel through which the rib projects. Rotation in the opposite direction will release the rib and leave the presser-bar free to be pushed in to collapse the ink-reservoir.

In the accompanying drawings, Figure l is a perspective view of a pen embodying my invention. Fig. 2 is a partial longitudinal section of the same. Fig. 3 shows a modica- A pressertion of the invention, and Fig. 4 is a crosssection on the line L 4, Fig. 3, on an enlarged scale.

The barrel 1 is of hard rubber or other rigid material. It incloses the ink-reservoir 2 of elastic rubber. The presser-bar 3 lies along one side of the reservoir and has a rib Lipassing out through a slot 5 in the barrel. Adjacent to one end of the rib is located the tubular locking device,which is preferably a sleeve 6, concentric with the barrel and extending from one end of the rib to or aboutto the end of the barrel. the sleeve has an internal or female screwthread engaging with an external or male screw-thread formed on the outer surface of the barrel. It follows that when the sleeve is rotated it will move lengthwise on the barrel, and one end will come in contact with the adjacent end of the rib 4 and forcing the rib lengthwise in its slot in the barrel will clamp it tightly against the opposite end of said slot. The rib cannot then be pushed in to collapse the ink-reservoir, but will be firmly locked. To insure this result, the ends of the rib are For some portion of its lengthl preferably undercut a little, as shown, so as to slightly overlap the ends of the sleeve and the slot. To unlock the rib, the sleeve is given one or two turns in the opposite direction, which back it away from the rib and leave thelatter free to be pushed in.

In order that the cap 7 may fit both the ta- I pered end of the sleeve and opposite end of the barrel, the outside diameter of the sleeve must be no greater than the opposite end of the barrel. That portion of the barrel surrounded by the sleeve must, therefore, be reduced in diameter to receive the sleeve. This reduced portion extends to a point slightly.A

beyond the end of the rib, where a shoulder 8 is formed, which the end of the sleeve almost touches when the rib is locked, thus preserving the uniform size of the barrel from end to end. For convenience in manufacture both IOO @ring only a small screw-threaded portion of the barrel and having an internal screw-thread engaging therewith. The ring ispreferably large enough to encirclethe barrel without reducing the latter in diameter. One edge of the ring is close to one end of the rib, so that o when the ring is screwed toward the rib it will lock it against the opposite end of its slot.

Having thus described my invention, what IO I claim is- 1. In a self-filling fountain-pen, the combination with a barrel having a slot, of an elas tic ink-reservoir in said barrel, a presser-bar having a rib projecting through said slot, and rotatable means for forcing said rib lengthwise against one end of said slot.

2. In a self-filling fountain-pen, the combination with a barrel having a slot, of an elastic ink-reservoir in said barrel, a presser-bar 2O having a rib projecting through said slot, and

a rotatable locking member abutting against one end of said rib and operating to force said rlib lengthwise against the opposite end of said S ot.

3. In a self-filling fountain-pen, the combination with a barrel having a slot, of a flexible ink-reservoir in said barrel, a presser-bar havinga rib projecting through said slot, a tubular locking member rotatable on said barrel, and means for effecting a longitudinal movement of said locking member when rotated to cause it to engage with one end of said rib.

4. In a self-filling fountain-pen, the combi.

nation with a barrelhaving a slot and provided with external screw-threads, of a flexible ink-reservoir in said barrel, a presser-bar having a rib projecting through said slot, and

a tubular rib-locking member rotatable on scribing witnesses.

E OY CONKLIN.

Witnesses:

THOMAS DURANT, ALEXANDER S. STEWART.

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