US841475A

US841475A - Self-filling fountain-pen.

Info

Publication number: US841475A
Application number: US31142106A
Authority: US
Inventors: Paul E Wirt
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-04-13
Filing date: 1906-04-13
Publication date: 1907-01-15
Anticipated expiration: 1924-01-15

Description

No. 841,475. PATENTBD JAN. 15, 1907-.

P. E. WIRT. SELF FILLING FOUNTAIN PEN.

APPLICATION FILED APR.13. 1906.

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\ PAUL E. WlRT, 0F BLOOMSBURG, PENNSYLVANIA.

SELF-FILLING FouNTAm-PEN. i

F ountain-Pens, of whichthe following is a specification.

This invention relates to self-filling fountainpens of the plunger type, wherein a lunger or piston is employed within the older or case for creating the necessary vacuum or suction to effect a filling of the reser-.

i To this end the-invention has specially in view the provision of a ractical form of pumping attachmentfor ountain-pens emodying simplicity of construction, a minimum number of parts, and reliability of action.

In this connection the invention has. for a general object dispensing with the employment of collapsible rubber sacks-or bags as a reservoir for the pen and also obviating the use of press-bars, levers, cams, and the various kinds of auxiliary devices and attachments that are ordinarily associated with the rubber sack common to many self-filling pens.

In carrying out the above objects the pres ent invention provides a plunger-pumping device or attachment which does not increase in any way the desirable proportions of a fountain-pen, while at the same timeinvolventirely out of the waywith'but affecting or disturbing the ordinary functions 'of the fountain-pen.

With these and other objects in view, which will'more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and

claimed.

The essential features of the invention involved in the construction and relation of the plunger-head and the controlling-stem therefor are susceptible to some structural modifications without affecting the scope of the invention, a preferred embodiment of which is shown in the accompanying drawin s, in whichlgure 1 is a sectional view of fountain-- Specification of Letters Patent.

Application filed April 13,

1906- seria nasnazi.

pen equipped with the filling attachment contemplated by the present invention and showing the plunger-head. and its controllingstem disconnected nd in the position which they occupy when The pe11-reservoir is filled. Fig. .--2 is a similar view showing the plungerhead and stem releasably hooked together or engaged to permit of the reciprocation ofthe plungen-head for fillin purposes. Fig. 3 is a perspective view of t e complete pumping attachment or device, showing the varlous parts thereof separated. Fi 4 is a detail in perspective, showin a mo ification which may be resorted to 1n the construction of a plunger-head.

The improvements contemplated herein are capable of application to the ordinary types of fountain-pens, so for illustrative purposes there is shown in the drawings a fountain-pen embodying in its general organization a reservoir-holder 1, Whose inthe pen. Also, in the construction illustrated, the liolder 1 is equipped at one end with the pen-bearing sectlon or nozzle 3, fitted with the pen-point 4 and the feeder 5. It is preferable in carrying out the present invention to provide the holder, container, or case 1 atthe end opposite the pen-bearing section with a threaded socket 6, adapted to receive the eXteriorly-threaded fasteningcollar 7, formed at the inner side of an operating-knob 8, to which is permanently screwed the front end of the reciprocating plunger-stem 9, which in conjunction with the plungerehead 10 constitutes apumping attachment or device for filling the pen-reser- A distinctive feature of the invention reger-head l0 and its relation to the stem 9. Referring to the plunger-head structure, it will -be observed that the same essentially sitely-arranged head-disks 11 and 12, respectively, and an interposed larger packin -disk 13, preferably of cork. 12, and 13 are placed in closely-assembled relation and are united in said relation through the medium of a plurality of fastening-pins of rivets 14, extending through alined openings in the several disks and upset or riveted at their ends onto the head-disks.

The plunger-head 10 as'an entirety is provided therethrough with what may be termed a stem slide opening 15, which slidably sides in the specific construction of the plun- The-several dis s 11,

Patented Jan. 15, 1907.

terior chamber 2' constitutes the reservoir of and preferably consists of a pair of oppo interior surface of the holder, but also packs the plunger-stem, thereby obviating leakage.

Also the said cork packing grips the interior surface of the holder with sufiicient firmness to hold the lunger-head stationary in any position in W ioh it may be left by the stem.

To provide for the releasable or interlocking engagement between the plunger-stem and the lunger-head, the latter is preferably provided on one of its head-disks 12 with an integral offset keeper-hook 16, adapted to be engaged by a laterally-projecting catch rojection- 17 at the inner terminal of the p unger-stem 9. In this connection a modification that may be resorted to is the one suggested in Fig. 4, wherein the keeper-hook 16 is illustrated as of a duplex construction having oppositely-arranged hook elements 18, so that an engagement of the plunger-stem catch may be made with the kee er byturning the stem in either direction. owever, the single type of hook seems to be the preferable one, inasmuch as it simply requires the turning of the stem in one direction for engagement purposes and in the other direction for disconnecting the stem and the plunger-head.

When it is desired to fill the pen, the parts bein in the positions shown in Fig 1, it is simp y necessary tounscrew the operatingknob, draw out the stem, and turn the latter to bring its catch beneath and into engagement with the keeper-hook of the plungerhead. This looks the parts together, so that the plunger-head can be reciprocated to draw in a supply of ink for the reservoir. After this is done and the plunger-head brought to the outer end of the container the stem is turned to disconnect the same and then moved back into the holder and the op- 1 erating-knob secured by screwing in the fasger-stem slidable through the head an provided with a terminal catch projection adapted to be turned'into and out of en 'agement eing arwith said hook, the said packingi1 1d d 0 er an ranged to ack the head 1n the also to pac the plunger-stem.

- In testimony whereof I hereuntoafliz; my signature in the presence of two witnesses.

. PAUL WIRT.

Witnesses JAs. C. BROWN, S. F. PEAOOCK.