US1457875A

US1457875A - Stylographic fountain pen

Info

Publication number: US1457875A
Application number: US590724A
Authority: US
Inventors: Noel H Coates
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-09-26
Filing date: 1922-09-26
Publication date: 1923-06-05
Anticipated expiration: 1940-06-05

Description

June 5, 31923. 11,457,875

N. H. coATl-:s

STYLOGRAPHI C FOUNTAIN PEN Filed Sept. 26, 1922 A/j y ///A// 0W and illustrated in the accompanying Patented lune 5, i923.

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application med september 26, 1922. serial No. 590,724

To all lwho/m, t may concem:

Be it known that ll, Noni. H. C oii'rns, a citizen of the United States, residing at Oakland, county of Alameda, and State of California, have invented new and useful Improvements in Stylograpliic Fountain Pens, of which the following is a specification. v

This invention relates to stylographic fountain pens, and has for its object to simplify and improve the construction and operation of a device of this sort. 0

These pens being provided with rigid points, the problem is to control .the iiow of ink thereto in a simple and effective inanner, and at the same time insure against leakage when the pen is not in use. In the resent invention l have provided a novel) and simple valve action for controlling the How of ink, the valves automatically opening when the pen is. 1n use and remaining closed at all other times.

ll-have also embodied a simple and edective self-filling feature in the pen.

One form which my invention may assume is exemplified in the following descri tion awings, in whichc lEig. 1 shows a side elevation of a en.

Fi 2 shows a longitudinal, centr sectiona view of the same.

Fig. 'shows a cross section on the line Y ess of rig. 2.

Fig." 4 shows a cross section on the line 4-4 of F' 2.

Fig. 5 lows an enlarged section of the upper end of the pen.

Referring in detail to the accompanying drawing, it will be seen that the pen coinrises a barrel 10 closed at its upper end by a head 11, which preferably is formed integral with the barrel and having at its lower end a plug 12, which preferably is screw-threaded into the barrel. Extending longitudinally through the barrel 1s a stem 13 which has its upper end fitted slidably in an Opening. in the head ll, and at its lower end isl provided with a stylus 14, which extends through van opening in the plug 12. 'lhe portion of the stein extending through the head 11 is fluted or grooved, as .shown at ,15, to admit air to the interior of the barrel, and the stylus is also rovided with grooves 16 to allow ink to ow out. The lower end of the stem has a ange-hke .plug 12.

the head 11. This tube has an end portion v 2l formed with a vent opening 22 and al pocket 23. ln the pocket is mounted a valve 24 adapted to seat in the opening in the head 11, the upper end of the stein 13 terminating short of the end of the barrel. The valve is suspended by a helical spring 25, which spring, in turn, is secured to the` end of the tube 20 and serves to' keep the valve 24 seated when the parts are assein bled, as shown in Fig. 2.

ln operation, the pressure exerted on the stylus 14 in. writing will move the stem 13 upwardly and unseat the valve 17, so that ink will ow from thebarrel to the tip of the stylus. At the same time the upper end of the stem 13 will contact with the valve 24 and raise the latter, so. that air will be admitted throu h the vent opening 22 to the interior of thearrel.

When it is desired to lill the barrel, this can be done by unscrewing the tube 20 and sliding it back and forth on the barrel so as to create a suction within the barrel, the suction being suciently strong to lift the stem 13 so as to unseat the valve 17. The pen can also be filled by removing the The adjustment of the upper valve can be varied through the screwthreaded connections between the tube 20 and the barrel.

The above-described device is simple and inexpensive to construct. When not in use no leakage of ink can occur, due to the closing of the

valves

17 and 24 by spring action. The opening of these valves for writing purposes is entirely automatic. Also the construction shown herein permits the tube 20 to be used for creating suction to lill the pen.

Various changes in the construction and arrangement of the several parts herein shown and described may be employed without departing from the spirit of my invention as disclosed in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. A stylographic fountain pen comprising a barrel, a stylus, a spring-pressed stem on the stylus extending longitudinally of the barrel and guided in openings in the opposite ends of the barrel, a valve carried by the stem to control the opening in the bottom of the barrel, a vented cap fitted over the upper end of the barrel and a valve carried by the cap t0 control the opening in the upper end of the barrel, both of said valves being held normally closed by spring pressure and adapted to open when the stem is moved upwardly under the pressure exerted on the stylus in writing.

2. A stylographic fountain pen comprising a barrel, a stylus, a spring-pressed stem on the stylus extending longitudinally of the barre and guided. in openings in the opposite ends of the barrel, a valve carried by the stem to control the opening in the bottom of the barrel, a vented cap fitted over the up er end of the barrel and a valve carried by t e cap to control the opening in the upper end of the barrel, both of said valves being held normally closed by spring pressure and ada ted to open when the stem is moved upwar ly under the pressure exerted on the stylus in writing, said cap being slidable on the barrel and adapted to create suction within the barrel whereby to raise the stem and permit automatic filling of the barrel.

3. A stylographic fountain pen comprising a barrel, a stylus having a stem extending longitudinally of the barrel and guided in openmgs in the opposite ends of the barrel, a' valve on the stem to control the opening in the lower end of the barrel, spring means exerting downward pressure on the stem to maintain the stylus projected and the valve thereon closed, a vented cap for the upper end of the barrel and a springpressed valve carried by the cap to control the opening in the upper end of the barrel, said last-named valve being so positioned with relation to the stem as to be raised thereby when the stern is depressed, due to the pressure on the stylus in writing.

4. A stylographic fountain pen comprising a barrel, a stylus, a spring-pressed stem on the st lus extending longitudinally of the barre and guided in openings in the opposite ends thereof, a valve carried by the stem to control the opening in the bottom of the barrel, the lower end of the barrel being formed by a screw-threaded plug, which plu forms at its inner end a seat for the va ve, a cap fitted over the upper end of the barrel and a valve carried by the cap to control the opening in the upper end of the barrel, both of said valves being held normally closed by springpressure and adapted to open when the stem is moved upwardly under preure exerted on the stylus in writing.

5. A stylographic fountain pen compris'- ing a barrel, a stylus, a spring-pressed stem on the stylus extending longitudinally of the barrel and guided in openings in the opposite ends thereof, a valve carried by the stem to control the opening in the bottom' of the barrel, acap fitted over the upper end of the barrel7 a spring-pressed Valve carried by the cap to control the opening in the upper end of the barrel, the upper end of the barrel being formed with exterior screw threads to co-operate with interior screw: threads on the cap, both of said valves being normally closed by spring pressure and being adapted to open when the stem is moved upwardly by preure exerted on the stylus in writing.

6. A stylographic fountain pen comprising a barrel, a stylus, a spring-pressed stem on the stylus extending longitudinally of the barrel and guided in openings in the opposite ends thereof, a valve carried by the stem to control the opening in the bottom of the barrel, a cap fitted over the upper end of the barrel, said cap having a vent and a pocket in its end, a valve in said pocket adapted to seat against the opening in the upper end of the barrel and a spring connected to the cap for pressing the valve against its seat, both of said' valves being opened by an upward movement of the stem produced by pressure on the stylus in writmg.

NOEL H. COATES.