US757543A - Fountain-pen. - Google Patents

Description

No. 757,543. PATENTED APR. 19, 1904.

M. R. GROSSMAN.

K0 MODEL.

'-1 i510 1 ai g UNITED STATES Patented April 19, 1904.

PATENT OFFICE.

FOUNTAIN-PEN.

SPECIFICATION formingpart of Letters I'atent No. 757,543, dated April 19, 1904.

Application filed January 28, 1904,

To all whom it may concern:

Be it known that I, MARTIN R. OnossMAN, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Fountain-Pens, of which the following description, in connection with the accompanying drawings, is a specification, like numerals on the drawings representing like parts. This invention relates to fountain-pens, and has for one of its objects to provide a novel feed device which prevents all flooding or gushing of the pen and makes it practically non-leakable.

Another'object of the invention is to provide a feed device comprising an open-ended feed-tube, the open end of which projects beyond the barrel and through which open end the pen can be filled. This avoids the necessity of making the barrel in two or more parts which are screw-threaded or otherwise joined together, and thereby absolutely does away with all leaky joints.

In constructing a pen according to my invention I make the barrel of one piece and provide the same in its end with a substantially axial opening through which the open-7 ended feed-tube is inserted. Said feed-tube may extend for a greater or less extent into the barrel, as desired, and is provided with a longitudinal slot which extends substantially to the slit in the pen-point. The projecting end of the feed-tube is closed by a suitable removable plug. The slot in the feed-tube constitutes a feeding-channel through which the ink is conducted to the pen-nibs. The barrel can be filled by simply removing the plug and filling it with a suitable dropper through the open end of the feed-tube.

In the drawings, Figure 1 is a side view of a pen embodying my invention. Fig. 2 is a longitudinal section, on an enlarged scale, of

tube therein.

The barrel of the pen is designated by 3 Serial no. 191,057. (No model.)

and is formed with the usual ink-chamber 4. The end of the barrel is provided with the substantially axial bore 5,'through which is inserted a feed-tube 6, said latter being made exteriorly to tightly fit the bore 5. This tube is provided with the longitudinal slot 7, which extends from a point 8, near one end thereof, clear to the other end. The end of the barrel 3 is counterbored, as at 10, to provide a space immediately surrounding the feed-tube into which the pen-point 9 is inserted and frictionally held in a manner very similar to that in which an ordinary steel pen is held in an ordinary penholder.

The tube 6, it will be understood, is permanently and fixedly carried in the bore 5 of the barrel independently of the pen-point 9, so that the latter can be readily removed or inserted without in any way disturbing the feed-tube. I Y

The tube 6 is hollow or tubular throughout its entire length, and to close the open end' thereof, which projects beyond the barrel, I employ a suitable plug 11, which will preferably have a suitable finger-piece or knob 12,

by means of which it can he removed. As-

seen in Fig. 6, the plug completely fills the feed-tube, and theink is conducted around the plug 11 to the pen-points through the slot 7 which forms an ink-conducting channel. The terminal point 8 of said slot 7 is preferably situated substantially opposite the usual hole 13 at the end of the slit in the pen-point.

I have demonstrated from practice that the air-pressure on the plug 11 is suiiicient to hold it in the projecting end of the feed-tube 6, and, indeed, the pressure of air is such that without some suitable stop to limit its inward movement said plug would tend to work its The knob 12 therefore perway up the tube.

First, it provides a finiorms two functions.

ger-piece by means of which the plug can be A feed constructed as above described is very simple and inexpensive to manufacture, and will absolutely prevent the pen from flooding or gushing, even when there are only three or four drops of ink in the barrel.

By simply removing the plug 11 an open passage into the ink-chamber of the barrel is provided, and the pen can be filled through said open end of the feed-tube by means of an ordinary dropper 31, as shown in Fig, 8, or in any other suitable way. After the pen is filled the plug 11 is put in place and the pen is ready for use.

By employing the feed-tube as a filling-tube it is unnecessary to make the barrel in two or more parts united by a screw or other joint, and therefore I contemplate making my barrel in one piece. This has the advantage that all liability of leaky joints is absolutely avoided.

As herein illustrated, the plug 11 is provided with the spring or resilient fingers 16,. which by their frictional engagement with the interior of the tube 6 serve to hold the plug in the dotted-line position, Fig. 2,while the pen is being filled, as seen in Fig. 8. This avoids the necessity of entirely removing the plug during the operation of filling the pen, and thus the liability of losing it.

I prefer to make theslot 7 with the convexed walls, as shown in Figs. 6 and 7, although it may be made with straight or concaved walls, if desired.

My invention is not limited to the exact.

form and arrangement of parts illustrated, and these may be varied in many ways -without sacrificing any of the advantages of the invention or departing therefrom.

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

1. In a pen, a barrel, anopen-ended slotted feed-tube inserted in the end of said barrel, and a removable plug to close the open end of said tube.

2. In a fountain-pen, a barrel containing an ink-reservoir and having a substantially axial opening in one end, an open-ended slotted feedtube inserted in said opening, and a removable plug to close the open end of said tube.

3. In a fountain-pen, a 'barrel having an ink-chamber and provided at one end with an opening, an open-ended slotted feed-tube inserted into said opening and projecting beyond the barrel, a removable plug in the end of said feed-tube, the. end of the barrel being formed with an annular chamber surrounding the feed-tube, and a pen-point frictionally held in said chamber.

4. In a fountain-pen, a barrel having an ink-reservoir provided with an opening in one end, an open-ended slotted feed-tube fixedly secured in said opening and projecting beyond the barrel, a removable plug to close the open projecting end of the feed-tube, and means to prevent said plug from working its way into the tube.

5. In a fountain-pen, a barrel having an ink-chamber and provided with an opening at one end, a slotted combined feed and filling tube inserted in said opening and projecting beyond the barreL'and a removable plug closing the projecting open end of said tubefthe slot in said tube forming a channel to conduct MARTIN R. CROSSMAN.

Witnesses:

LoUIs 0. SMITH, GEO. W. GREGORY.

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