US1615312A

US1615312A - Fountain pen

Info

Publication number: US1615312A
Application number: US69040A
Authority: US
Inventors: Poetz John Carl
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-11-14
Filing date: 1925-11-14
Publication date: 1927-01-25
Anticipated expiration: 1944-01-25

Description

Jan. 2s, 1927. 41,615,312

J. c.' PoETz- FOUNTAIN PEN Filed Nov. 14,4 1925 Patented Jan. 25, 1927.

Eliefern ATEfS `JOHN CARL fronrz, or naciera, amino.

1 FOUNTAIN Application VAfiled. November L4. 1925. 'Serial No. 69,040.

age is avoided and the iil'lingidevice is well sealed for use of the pen, .andgthe parts may readily-be -manipulated in the filling operation. The fountain pen as constructedaccording to my invention is comprised of a practical mini-mum number of parts7 .is durable, and may be manufactured aft a comp aratively `lo-vv .cost of production. I

,The invention consists 1n certain novel features of construction and combinations and arrangements-of parts in the filling device of the vpen-as will hereinafter `be more fully set ,forth and claimed.

In the accompanying drawings I have illustrated onecomplete example of thephysivrcal.embodiment of my invention wherein the parts are combined and arranged in accordance ,with the best mode 1 have thus Yfar devised for the practical application of the principles of any invention.

Figure 1 is a vertical longitudinal section of the pen with some parts in elevation, showing the parts in normal position with the pen filled.

' Figure 2 is an enlarged sectional view showing the plug-handle withdrawn as when filling the pen, and in closed dotted position.

Figure 3 is a detail sectional view at line 3-3 of Fig. 2.

In the preferred form of my invention as illustrated in the drawings utilize a cylindrical barrel 1 of suitable material and size to which is attached the head 2 of the pen which is provided with the usual pen point 3. The feed of ink from the barrel to the pen point is through ducts 4 in the head 2, and the barrel is also filled, by suction, through these ducts when the head of the pen is immersed in the supply of ink.

The pen is filled with ink through the manipulation of a reciprocable piston 6 which conforms to the cylindrical interior of the barrel and is designed to be reciprocated therein, first to force out any ink that may remain in the barrel for cleansing purposes, and then to draw in a fresh supply of ink through the ducts 4 by the action of suction; The 4piston is `provifled with -an annula'rexterior 4groove 7 inwhich a packing ring '-7 is located to prevent passage of ink along the piston surface, .and Aa rubber gasket 8 is also attached yto Ethe piston vfor -contactwith the inner wall ofjthe cylinder or :barrel Lto prevent leaks.

The gasket l,is :secured on the end of the rpiston lby means of a -metal plate or retainer F9, `and the Vplate and 'gasket are fastened -to the piston by means of a si-iita-blenumber of screws or pins 10 lwhich pass-through' the plate gasket andare lsecuredy in the piston. y

`In :its normal position at the upper Aend-of the barrel, the piston lis held against rotation ztheren'by 'the co-action -of an exterior longitudinal vgroove orsocket `11, and a retaining pin 1,2, the latter :fixed inthe wall of the barreland projecting radially ftherein to occupy the space of the groove v11. Wfl-n Figure E2 it will be seen that the groove eX- tends through a `portion of the piston and also throughfthe gasket yand its retaining plate to lpermit `the piston to be pushed o-r moved from its normal position in full lines Figure .2 to its dott-ed position in thisfligure.

The lretaining upin however prevents the pis- 'ton from :being )pulled upward :to the eX- treme upper open end of the barrel.

The piston is provided with a central longitudinal opening to accommodate its detachable stem 13 which is supported therein under normal conditions as indicated in Figure 1. At its inner end the stem is fashioned with an enlarged head 14 which is threaded at 15 to engage complementary threads in a socket 15 of the piston. I At the junction of the head with its stem a conical valve portion 16 is provided which engages a complementary seat 17 fashioned in the longitudinall opening of the piston, to prevent passage of ink through the piston.

At its outer end the stem is provided with a plug-handle or knob 18 having a socket therein for the end of the stem, and the plughandle or knob is secured on the stem by means of a transversely extending retaining pin 19.

To insure a close fitof the plug-handle within the upper end of the barrel, the plug is cut away, grooved, or undercut as at 20, and a shoulder 21 is thus formed on the plug to engage'over the end of the barrel. By this means of' the annular groove on the plug and its shoulder, the plug, in normal position is rigidly retained within the end of the barrel by the frictional engagement of the plug and barrel, and the stem which is rigid with the plug is maintained in its normal position of Figure 1.

As an additional means for securing a leak-proof joint of the stem in the piston, the plug-handle is fashioned with a central boss 22 which, when in normal position tits neatly into a central opening 23 in the metal retaining plate 9 and bears against the eX- posed central portion of the rubber gasket 8 to compress the latter about the stem.

In Figure l the pen is illustrated as sunstantially filled with ink and with its parts in position for use. Vhen the'pen'is empty and the supply of ink is to be replenished,

the plug-handle is grasped by the lingers and thumb and pulled from the end of the barrel. thus pulling the head ofthe stem into the socket of the piston. Then the stem is rotated to engage the threads of the head in the threaded socket, the pin 12 and groove 1l cio-acting to prevent turning of the piston. After the head is screwed into the piston and thus attached thereto, the piston is pushed down in the barrel by pressure on the plug-handle to eject air and any ink remaining in the barrel through the ducts 4L of the pen-head. Then by reversing the movement of the piston by a pulling action on the plug handle, and with the pen head immersed in an ink supply, it will be appar ent that a supply of ink is drawn by suction into the barrel for filling the same. After the barrel has been filled and with the piston retained against rotation in its normal position of Fig. 2 the plug handle is turned to unscrew the head 14 from the piston and the stem is then pushed into normal position of Figure l. In this position the plug handle closes the upper end of the barrel and makes a tight joint between the stem and piston to prevent leaks.

I-Iaving thus fully described my invention, what I claim as new and desire to secure by Letters Patent is- 4l. The combination with a barrel having a laterally projecting retaining pin therein and a piston having an exterior transverse groove for co-action therewith, of a stem and means for detachably connecting said stem and piston, a gasket and an open center retaining plate on the piston, a plug handle on the stem adapted to seat in the end of the barrel, and a boss on said plug-handle-adapt ed to seat rwithin the retaining ring for enn gagement with said gasket.

2. In a fountain pen, the combination with aV piston having an exterior, transverse groove, a central threaded socket and an alined opening through the piston, of a barrel having a laterally projecting retaining pin therein for co-action with the groove of the piston, a stem reciprocable in the piston and an enlarged threaded head on the stem for engagement with said socket, a gasket and an open center retaining plate on the piston, a plug handle on the stem adapted to seat in the end of the barrel, and a boss on the plug handle adapted to seat within the retaining ring for engagement with said socket.

In testimony whereof I affix my signature.

J OI-IN CARL POETZ.