US2127385A

US2127385A - Fountain pen

Info

Publication number: US2127385A
Application number: US149976A
Authority: US
Inventors: Baron Herman
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-06-23
Filing date: 1937-06-23
Publication date: 1938-08-16
Anticipated expiration: 1955-08-16

Description

H. BARON FOUNTAIN PEN Herman Baron INVENTQR ATTORNEY$ Filed June 25, 1937 Patented Aug. 16, 1933 UNETE STTES PTELNT QFFHQE 4 Claims.

The invention relates to a writing pen and more especially to a fountain pen.

The primary object of the invention is the provision of a pen of this character, wherein the bar- 5 rel is fitted with a novel form of pump so as to enable the quick'and convenient filling of the pen with ink and such pump is a built-in unit of the pen.

Another object of the invention is the provision of a pen of this character, wherein the pump unit includes an extensible one stroke stem which on the retracting of the same will be confined or concealed within the barrel of the pen and is readily accessible for the operation of the unit to fill the pen with ink by a single stroke action.

A further object of the invention is the provision of a pen of this character, which is simple in its construction, thoroughly reliable and ef- -:fective in operation, susceptible of filling with ink through a single stroke action in the operation of the pump unit, durable, and inexpensive to manufacture.

With these and other objects in view, the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing, which discloses the preferred embodiment of the invention and pointed out in the claims hereunto appended.

In the accompanying drawing:

Figure 1 is a side elevation of a pen partly in section constructed in accordance with the invention.

Figure 2 is a fragmentary vertical longitudinal sectional View showing the stem of the pumping unit extended.

Figure 3 is a view similar to Figure 2 showing the pumping unit in position for the filling of 4.0 the barrel of the pen.

Figure 4 is an exploded perspective View of the extensible stern parts disassembled.

Figure 5 is a sectional view on the line 5-5 of "Figure 1 looking in the direction of the arrows.

Similar reference characters indicate corresponding parts throughout the several views in the drawing.

Referring to the drawing in detail, the pen constituting the present invention comprises a barrel ill tapered outwardly at one end at l l and having in this end a pen point l2 in association with an ink feeder (not shown). The barrel iii provides an ink chamber l3 interiorly thereof and the opposite end of this barrel is normally open and internally threaded at M for removably accommodating a sleeve-like plug 55 carrying a guide cylinder IS, the latter being fixedly held in a center opening ll provided in said sleeve-like plug 85. This cylinder it constitutes a housing for a purpose presently described.

Accommodated Within the cylinder iii are the inner and outer telescopically fitted stem sections 58 and I9, respectively. The section I9 slidably telescopes over the section it and is pro vided with a bayonet slot 2!! longitudinally disposed therein for accommodating a latching lug 2| on the section i8. Thus the section [9 can be extended on the section i8 and both sections [8 and i9 latched in the extended relation thereof. 7 Q

The plug I5 is formed with a reduced inner end 22 which is accommodated within the open end of an expansible resilient bag 23. This bag fitted over the reduced end 22 is made fast and sealed concentrically about said reduced end by a clamping ring 24. The section N3 of the stem is slidable through a guide opening 25 centrally in the inner end 26 of the cylinder l6 and this section has separably connected thereto at its innermost end a half spherical head 2'! which is accommodated within the bag '33 at its inner closed rounded end 28 to avoid damage thereto under expansion of said bag. The section l9 snugly fits within the cylinder l6 and when latched with the section is after extension of the section l9 thereon through a single stroke of the stem for expansion of the bag 23 the barrel ll) of the pen will be filled with ink in that the contracting of the said bag within the barrel iii effects suction of ink through the feeder end II for the filling of the ink chamber [3 within said barrel. The section H1 at its outer end has fitted therewith a combined cap and hand knob 29 which enables manual manipulation of the stem for single stroke operation thereof and for the extending of the section it of said stem as well as the confinement of this section i9 within the cylinder It. When the section 59 is confined within the cylinder l6 and the section it has be- 4 latches the cylinder in the extended position with relation to the section I8 of the stem. By forcing these latched sections l8 and IS with each other inwardly of the cylinder I6, the bag 23 will be expanded and when the latter contracts through inherent elasticity or resiliency a suction will be set up in the chamber I3 so that ink can be drawn into the barrel H] for the filling of the pen. Thereafter the section I8 of the stem will have moved into the cylinder l6 and it is required that the operator or user pushes the section [9 into the cylinder l6 for confinement therein with the cap 29 closing the end IA of the barrel Ill of the pen. The pen is now filled with ink and ready for use in the usual well-known manner.

What is claimed is:

1. In a pen of the character described, a barrel forming an ink chamber, a plug firmly but removably supported in an opening formed in said barrel, an extensible stem slidably fitting in an opening formed in the plug, a substantially stationary cylinder carried by and substantially fixedly mounted on the plug interiorly of the barrel and adapted to accommodate the extensible stem when in contracted condition, and an inherently elastic bag interiorly of the barrel, substantially fixedly connected to the plug and expanded by the said stem when extended and actuated.

2. In a pen of the character described, a barrel forming an ink chamber, a plug firmly but removably supported in an opening formed in said barrel, an extensible stem slidably fitting in an opening formed in the plug, a substantially stationary cylinder carried by and substantially fixedly mounted on the plug interiorly of the barrel and adapted to accommodate the extensible stem when contracted therein, an inherently elastic bag interiorly of the barrel, substantially fixedly connected to the plug and expanded by the said stem when extended and actuated, and means for latching the stem extended.

3. In a pen of the character described, a barrel forming an ink chamber, a plug firmly but removably supported in an opening formed in said barrel, an extensible stem slidably fitting in an opening formed in the plug, a substantially stationary cylinder carried by the plug interiorly of the barrel and adapted to accommodate the extensible stem when contracted therein, an inherently elastic bag interiorly of the barrel, substantially fixedly connected to the plug and expanded by the said stem when extended and actuated, means for latching the stem extended, and a cap carried at the outer end of the extensible stem for the barrel.

4. In a fountain pen of the type described the combination including a fluid reservoir, means for at least assisting in the filling of said reservoir comprising a substantially cylindrical plug, firmly but removably seated in an opening formed in said reservoir, and having a substantially coaxial opening formed therein; an essentially cylindrical hollow sheath-like guide member relatively fixedly mounted on said plug positioned coaxial said opening formed therein; a composite extensible plunger member positioned within said guide comprising a plurality of concentric telescoping tubes adapted to be engaged with each other when in extended position, a substantially hemispherical head carried on and fixedly secured to the end portion of said plunger normally positioned Within said reservoir, said head being adapted to rest upon the end of said guide member furthest from said plug; and a substantially cylindrical sac, elastic and extensible along the axis thereof, closed at one end, enveloping said head and guide member and fixedly secured at the open thereof to said plug.

HERMAN BARON.