US1685414A

US1685414A - Fountain pen

Info

Publication number: US1685414A
Application number: US221436A
Authority: US
Inventors: Frank M Ashley
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-09-23
Filing date: 1927-09-23
Publication date: 1928-09-25
Anticipated expiration: 1945-09-25

Description

Sept. 25, 1928. 1,685,414

F. M. ASHLEY FOUNTAIN PEN Filed Sept. 23. 1927 1. IIIIIIIIIIIIIIII/III Ill!!! 11111111111)! INVENTOR Patented Sept. 25, 1928.

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

FOUNTAIN PEN.

Application filed September 23, 1927. Serial No. 221,436.

My invention relates to fountain pens. The object of my invention is to provide a fountain pen that is easy to fill and which will have a large ink capacity. A further object is to provide a pen having a main reservoir of relatively large capacity, that may be closed from the atmosphere, and a small feed reservoir that is at all times in open communication with the feed duct leading to the pen point, and means for opening communication between the main reservoir and feed reservoir to supply the latter with ink.

This pen should always be used with the main reservoir sealed in such a manner that no air can enter the main reservoir except when ink isfiowing therefrom to the feed reservoir, unless the pen is made in a small size whereby the feed plug is capable of controlling the entire ink supply.

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

Fig. 1 is a view of the exterior of a pen embodying my invention. I

Fig. 2 is a longitudinal sectional view.

Fig. 3 is a longitudinal sectional view of a portion of the piston rod, piston and filling tube, shown on a larger scale drawing, and showing one way to pack the joint between the filling tube and piston.

Fig. 4 is a longitudinal sectional view of the body portion of the pen showing the pis ton and alve held in proper position to allow ink to fiow from the main reservoir into the feed reservoir.

Fig. 5 is a tool used to turn the nut which compresses the packing around the piston rod.

A indicates the barrel of the pen in which is located the main reservoir A. B indicates a. pen section which is connected to the barrel at B. The inner wall of the barrel is formed with a smooth cylindrical wall and is enlarged in diameter at one end to provide a by-pass conduit A which is formed in open communication with a feed chamber B and the bore B in which the feed plug C rests.

The feed plug is provided with a centra cylindrical passage leading entirely therethru, and a small cylindrical tube D is held rigidly therein at one end and projects therefrom into and substantially the entire length of the main reservoir as shown. A feed duct C is formed in the feed plug in the usual manner, and a pen E is held in the usual man-v ner at the front end of the pen section.

A tubular piston rod F made of hard rubber, the inner diameter or which is somewhat greater than the outer diameter of the tube D, is fitted to slide thru a stufling box G formed in an end plug H, and is provided with a handle I, by means of which it may be reciprocate-d.

A piston J, of less length than the by-pass conduit A is fitted on the inner end of the piston rod F, which rod directly abuts the inner side of the end wall of the piston at J, as illustratedin Fig. 4, or may abut a washer K, as shown in Figure 3, which in turn abuts cork or other packing material K used to insure a tight sliding joint with the tube D. If the packing is not used, the'piston is made to slide over the tube D in close fitting relation in a bore J formed in the end wall of the piston.

A hole L is drilled thru the piston and pis ton rod to form a passage leading to the annular passage M formed between the piston rod and tube D, which passage communicates with the passage thru. the tube D and passage C leading to the atmosphere at N. The end surface 0 of the iston serves as a valve to close communicatlon between the main and feed reservoirs when it abuts the inner end of the pen section B, and when in this position the tube is closed by a plugP which is adj ustable in the end of the piston'rod D and also serves to prevent ink from passing from the reservoir to the atmosphere, as will be readily understood. This lug P may be made of cork or other suita le material such as soft rubber.

The inner end of the handle I is provided with a. thread I which engages a formed in the plug H.

As illustrated in Fig A, the piston rests in the conduit A midway thereof so that ink may flow from the reservoir A to the feed reservoir B, and the end of the tube adjacent the plug P is spaced therefrom so that air can flow from the atmosphere thru the tube D and annular passage M, and hole L into the main reservoir, and bubble up thru the ink therein to the upper end thereof as the ink flows therefrom nto the feed reservoir, thereby permitting the ink to flow freely during this operation. After the feed reservoir is thread filled, the handle I is screwed into the plug H to seat the piston and close the passage between the reservoirs and also cause the plug P to abut the end of the tube 1) and close the passage C thus completely closing the main reservoir.

The tubular piston rod is rather brittle and the Wallis thin. Therefore, .the arrangement "of the rod relative to the piston is rather imsmaller and more convenient gripping surface for the fingers, as illustrated at R, and have provided a smooth surface at S and S to hold the cap of the pen by frictional engagement.

To fill the pen, the handle is unscrewed from its engagement with the plug H and the opening N is submerged .in ink, after which the piston is drawn to the upper end of the reservoir, thus trapping the air and any 'ink therein, and forcing it thru the hole L, passage M and tube D thru passage-C and outlet N. When the piston is forced down thru the barrel, ink is drawn in thru the said passages and fills the reservoirs, after which the handle I is screwed into the plug H to close the conduit A and passage leading to the main reservoir as above set forth.

When the pen is full of ink, it is not so necessary to have the passages thru the tubes closed as the ink serves as a seal and prevents the pen from flooding, but when the reservoir of a pen having a large ink capacity is partly or nearly empty, the feed duct C is not able to hold the ink, especially when the air in the barrel expands due to heat, and if the tubular passages'are not closed, even though the valve between the reservoirs be closed, and the tubular passages not closed, the air in expanding will force some of the ink from the main reservoir thru said passages to the atmosphere.

Having thus described. my invention, I

claim as new: i

1. A fountain pen comprising a barrel having a reservoir therein, a-feed plug having a bore extending therethrough, a tubular piston-rod, a piston thereon, a tube extending from said bore in said feed plug through said piston into said piston rod and contributing to form an annular passage between said piston-rod and tube, said piston and rod having a passage leading from said reservoir to said annular passage to provide a continuous passage leading from said reservoir through said tube to the atmosphere.

2. A fountain pen comprising a barrel having a reservoir therein, a feed plug having a bore extending therethrough, a tubular piston-rod, a piston thereon, a tube extending from said bore in said feed plug through said bore extending therethrough, a tubular piston-rod, a piston thereon, a tube extending from said bore in said feed plug through said piston into said piston-rod and forming an annular passage between said piston-rod and tube, said piston and rod having a passage leading from said reservoir to said annular passage to provide a continuous passage leading from said reservoir through said tube to the atmosphere, said construction embodying a feed reservoir communicating with said first reservoir and means for closing communication between said reservoirs.

4. A fountain pen comprising a barrel having a reservoir therein, a feed plu having a bore extending therethrough, a tu ular piston-rod, a piston thereon, a tube extending from said bore in said feed plug through said piston into said piston-rod and forming an annular passage between said piston-rod and tube, said piston and rod having a passage leading from said reservoir to said annular passage to provide a continuous passage leading from said reservoir through said tube to the atmosphere, said construction embodying a feed reservoir communicating with said first reservoir and means for closing communication between said reservoirs, and means for closing the passage leading from the reservoir in the-barrel to the atmosphere.

5. A fountain pen comprising a barrel having a main reservoir therein, a pen section having a reservoir therein, a feed plug therein having a central bore extending therethrough, a tubular piston-rod having a piston thereon, a tube extendin from said bore in said feed plug through said piston into said piston-rod and contributing to form an annular passage therebetween leading from said reservoir through said tube to the atmosphere, said piston and tube fitting in sliding relation to provide a joint for the purpose specified, said construction having a feed chamber located adj acent the end of said pen section in open communication with the atmosphere at one end and with the main reservoir at its opposite end, said piston serving to close communication between said reservoirs.

6. A fountain pen comprising a barrel having a main reservoir therein, a pen section, a feed plug therein having a central bore extending therethrough, a tubular piston-rod having a piston thereon, a tube extending from said bore in said feed plug through said piston into said piston-rod and contributing to form an annular passage there between leading from said reservoir through said tube to the atmosphere, said piston and tube fitting in sliding relation to provide a joint for the purpose specified, said construction having a feed reservoir located adjacent the end of said pen section in open communication with the atmosphere at one end and with the main reservoir at its opposite end, said piston serving to close communication between said reservoirs, and means for closing the passage through said tube.

7. A fountain pen comprising a barrel having a reservoir therein, a pen section having a feed plug therein with a bore extending therethrough, a tubular piston-rod having a piston thereon, a tube extending from said bore in said feed plug through said piston into said piston-rod and contributing to form an annular passage between said piston-rod and tube and packing material located betweenthe end of said piston-rod and piston, substantially as shown.

8. A fountain pen comprising a barrel having a reservoir therein, a feed-plug having a bore extending therethru, a piston having a bore thru the-centre thereof one end of which is reduced in diameter, packing in said piston, a tubular piston-rod abutting said packing and holdin it under compression, a central tube eXten ing from said bore in the feedplug thru said piston and packing into said tubular piston-rod, said piston and rod having a passage leading from said central tube into said reservoir in the barrel.

In testimony whereof, I have signed my name to this specification, this 21st day of September, 1927.

FRANK M. ASHLEY.