US1685413A

US1685413A - Fountain pen

Info

Publication number: US1685413A
Application number: US144923A
Authority: US
Inventors: Frank M Ashley
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-10-29
Filing date: 1926-10-29
Publication date: 1928-09-25
Anticipated expiration: 1945-09-25

Description

Sept. 25, 1928. 1,685,413

F. M. ASHLEY FOUNTAIN PEN Filed Oct. 29, 1926 INVENTOR Patented Sept. 25, 1928.

UNITED STATES FRANK M. ASHLEY, F BROOKLYN, NEW YORK.

FOUNTAIN PEN.

Application filed October 29, 1926. Serial No. 144,923.

My invention relates to fountain pens of v the self-filling type.

The object of my invention is to provide a self-filling pen in which all of the parts may be made of durable material and which may be filled by a single outward and inward stroke of a piston.

A further object is to provide a pen having a large ink capacity without increasing the usual length of the pen, and other advantages hereinafter set forth.

Referring to the drawings which form a part of this specification: M

Fig. 1 is a side elevational view of a pen embodying my design and invention.

Fig. 2 is a longitudinal sectional view of the pen illustrated in Figure 1.

Fig. 3 is an enlarged view of the piston and rod construction shown in Figure 2.

A, indicates the barrel of the pen which is provided with a smooth cylindrical-reservoir A, the inner diameter of which is enlarged as illustrated at A 13, indicates the pen section which is shown connected to the barrel by a screw-joint C, but which may be connected by a tight slip joint, or made integral with the barrel if desired.

The pen section is provided with a friction surface at B reduced in diameter relative to the outer diameter of the barrel A, to provide means for holding the cap B to the pen section, the outside diameter of the cap being made equal to that of the barrel.

This reduction in diameter of the pen section adjacent the barrel, provides a gripping surface for the fingers, of such reduced proportions that a large barrel pen may be provided with a small grip surface, making a very convenient instrument to use, and also presenting a pleasing appearance when the cap is on the pen, the outside of the cap and barrel being of equal diameter.

It will be noted that the pen section is considerably longer'than those'of pens now in general use, which permits an exceptionally long feed-plug D, to be used, whereby the ink flow may be controlled, which is necessary where a large reservoir is used.

E, indicates a piston of novel construction which I prefer to make of hard vulcanized rubber or other suitable st-ifi elastic material. The piston E is formed with two or more concentric flanges E which present sharp outer edge portions which fit closely in air-tight relation with the inner wall of the arrel, and by this construction all sticking o the piston to the cylinder wall, due to gumming of the ink or undue area of surface contact between the piston and cylinder wall, is eliminated, and the piston may be moved with a minimum of friction and still maintain a perfectly tight sliding joint. I prefer to make the grooves between the flanges E, deep and narrow to permit the flanges to bend slightly, so that there will be an elastic contact between the edges of the flanges and cylinder wall, which provides for wear and also compensates for any unevenness in the cylinder bore. The piston is provided with a longitudinally-extending bore F at its centre, through which extends the piston-rod G on which the piston is rigidly mounted. A valve H is mounted on the end of the piston-rod to close the passage I, leading to the ink-duct in the feed-plug D. An annular space J is formed between the back of the valve and front end of the piston,

and in this space mounted on the piston-rod is a disc-shaped valve K, which is free to move back and forth between'the valve and piston, and serves to close one or more passages L, when the piston is forced forward in the barrel on its filling stroke.

A plug M, is held by a thread M to the rear end of the barrel and its outer end is provided with a friction surface M to engage and hold the cap B. The piston-rod passes through a central bore M formed in the plug, and a rodhead R is secured to the outer end of the piston-rod. A stuffing-box is formed in the plug by making a bore N therein to receive packing material N and a packing nut P, is threaded to engage a thread P, formed in the outer end of the bore. The packing nut P is screwed into the bore N far enough to provide room for the same thread P, to engage a thread R, formed on the shank R of the piston-rod head R, to prevent the piston-rod from being accidentally moved, and to regulate the movement of the valve H in controlling the flow of ink to the feed-plug, through the valve seat H, formed in the end of the pen section.

The pen is filled as follows:

First unscrew the head R from the bore N, then submerge the pen point and end of pen section in ink, then draw the piston to the rear end of the barrel, thus causing all air and ink therein to pass through the passages L, to the lower side of the piston, then push the piston downward its full stroke, which will cause the check-valve K to close at the beginning of the stroke, due to a partial vacuum being formed between the inner end of movement of the the plug M and the piston, and the downward piston will force all the air and ink that may be in the barrel, into the ink receptacle, and when the piston enters the enlarged bore at A the atmospheric pressure acting on the surface of the ink in which the pen is submerged, will force the ink through the feed duct and around the piston in the space A and into the reservoir of the pen, as will be readily understood. When through writing, the valve H may be closed and thus avoid any leakage of ink from the reservoir,

and also prevent evaporation in case the pen is laid aside for a considerable period of time. Having thus described my invention, I claim as new:

1. A fountain pen comprising a pen-section, a barrel having a smooth cylindrical bore which is of increased diameter adjacent the inner end of the pen-section, a pistonrod, a piston carried thereby having a passage leading therethrough, and automatic means for opening said passage on the outward stroke of the piston and closing said passage on the inward stroke thereof.

2. A fountain pen comprising a pen-section, a barrel having a smooth cylindrical bore which is of increased diameter adjacent the inner end of the pen-section, a piston rod, a piston carried sage leading therethrough, and a check-valve for opening said passage on the outward stroke of the piston and closing said passage on the inward stroke thereof.

3. A fountain pen comprising a pen-section, a barrel having a smooth cylindrical bore which is of increased diameter adjacent the inner end of the pen-section, av piston-rod, a piston carried leading therethrough, a check-valve mounted directly on the piston-rod for opening said passage on the outward stroke of the piston and closing said passage on the inward stroke thereof.

4. A fountain pen comprising a pen-section, a barrel=having a cylindrical reservoir formed therein, a piston-rod, a piston of hard semi-elastic material mounted rigidlythereon and carried thereby and having a plurality of concentric flanges located directly adjacent to each other with sharp outer edges formed thereon which contact with the walls of the cylindrical reservoir to form an air-tight sliding joint, substantially as set forth.

thereby having a pas-' thereby having a passage 5. A fountain pen comprising a barrel having a smooth bore, a piston rod, a piston having a. passage therethru and fixed on said rod, a means carried by said rod adapted to close said passage on the inward stroke of the piston and open said passage on the outward stroke thereof.

6. A fountain pen comprising a barrel having a smooth bore, a piston rod, a piston having a passage therethru and fixed on said rod, and means carried by said rod adapted to close said passage on the inward stroke of the piston and open said passage on the outward stroke thereof, and a valve carried on the inner end of said rod to close the forward end of said barrel.

7. A fountain pen comprising a barrel having a smooth bore, a piston rod, a piston having a passa e therethru and fixed on said rod, a check-va ve slidably mounted on said rod to close said passage on the inward stroke of the piston and open said passage on the out Ward stroke thereof.

8. A fountain pen comprising abarrel having a smooth bore, a piston rod, a piston having a passage therethru and fixed on said rod, a check valve slidably mounted on said rod to close said passage on the inward stroke of the piston and open said passage on the outward stroke thereof, and a valve carried on the inner end :of said rod to'closethe forward end of said barrel.

9. A fountain pen comprising a barrel, enlarged in diameter at its forward end to provide aspace for ink, and having a smooth bore, a piston rod, a piston having a passage therethru and fixed on said rod, and means carried by said rod adapted to close said passage on the inward stroke of the piston and open said passage on the outward stroke thereof.

10. A fountain pen comprising a barrel having a smooth bore, a piston rod, a piston having a plurality of thin flanges provided with sharp outer edges, said flanges being of slightly larger diameter than the diameter of the bore and adapted to bend slightly to permit the piston to enter the bore and slide in frictional engagement therewith, the said flanges being made of hard semi-elastic material substantially described.

In testimony whereof I have afiixed my signature.