US1787896A - Fountain pen - Google Patents

Description

Jim. 6,1931. F. B. CHAMBERLIN 1,787,896

FOUNTAIN PEN Filed July 8, 1929 mo AQZ/ Patented Jan. 6, 1931 rm: '3. cnmnmLm, or commrans, onro noun-ram rm:

"Application filed July 8,

This invention relates to improvements in fountain pens and has for its, primary object the provision of an improved mechanism, constituting a permanent part of the pen, for

I effecting the complete filling of the ink-holding reservoir of the pen.- In the ordinary fountain pen there is. provided a collapsible sack, and the barrel of the pen is equipped with a sack collapsing and extending means.

I) It is a matter of common experience that this customary construction in fountain pens does not permit of a complete filling of the inkholding sack with a writing fluid and it is necessary at relatively frequent intervals to refill the pen with the writing fluid.

It is an outstanding object of the present inventionto eliminate the ink-holdingsack from the barrel of the pen and to provide an improved filling mechanism consisting of a folding bulb at one end of the pen arrel which folding bulb when actuated operates tov permit of the free flow of ink into the elongated ink-holding chamber of the bar-, rel, permitting said chamberto be filled to its maximum capacity with the writing fluid by providing the bulb with a novel type of valve mechanism, which is of such design that while ink is being drawn into the barrel air is at the same time excluded, whereby through the exclusion of the air the maximum capacity of the chamber or barrel may be used in receiving the writing fluid.

It is another object of the invention to provide a fountain pen which will not leak when being carried about the person and also one of positive yet inexpensive construction and wherein the pump mechanism does not add appreciably to the size of the pen or render the same bulky or awkward to carry and manipulate.

With these and other objects in view which will appear as the description proceeds, the invention consists in the novel features of construction, combinations of elements and arrangements of parts hereinafter tohe fully described and pointed out in the appended claims.

In the accompanying drawings:

Figure 1 isa view in vertical section taken through a-fountain pen formed in accordance 1929. Serial R0. 378,1589. I f

with the principles of the present invention Figure 2 is an enlarged vertical sections view taken through thevpump mechanism of the pen and disclosing the pump mechanism in a position admitting ink into the receiving chamber of the pen barrel,

Figure 3 is a horizontal sectional view on the plane indicated by theline 3-3 of F ig-' ure 2,

Figure 4 is a similar view on the line 4-4 of Figure 2, y

gigure 5is a plan view of the disk valve, an c Figure 6 is a detail view in side elevation thereof. I I c y Referring more particularly to the drawings, wherein has een depicted one of the preferred embodiments of my invention, the numeral 1 designates the barrel of the pen. This barrel may be formed from any of the customary materials employed in the manu facture of pens of this character and, also, may be of any desired sha e, form or appearance, since. it is one of t e features of the present inventionthat while an improved type of filling mechanism has been provided, yet the standard exterior construction of the pen isnot affected thereby. The lower end of the barrel 1 is provided with the usual 11 point 2, and the ink guidingfeeder 3, the Fa t ter being provided with the usual channel or passage 4 by which the writing fluidmay be I conducted from the ink receiving chamber5 withinthe barrel in regulated quantities to the pen point. 1

The upper end of the barrel 1 is vprovided with. a normally closed wall 6 and. extending longitudinally and axially through the chamber 5 and connected with the wall 6 is a tube 7 of relatively smalldiaimeter. The lower end of this tube terminates a short distance above the feeder 3, as shown in Figure 1. H

The wall 6 is exteriorly threaded as at 9 for the reception of aninternally threaded cap section 10. When the pen is in ordinary use, as shown in Figure 1, the cap section is connected threadedly withthe barrel 1 so as to constitute in effect a continuation of said barrel. y

The cap section 10 is of sufficient size to provide a bulb compartment 11 between the there is received a pump mechanism which in this instance comprises a. folding bulb 13 formed from soft rubber or other material possessing equivalent flexible properties. This bulb has the body portion thereof provided with accordion pleats. The lower end of the bulb is secured by means of an adhesive or otherwise to an annular rib 14 projectingv upwardly fgom the wall 6', while the upper portio n ofthe bulb 13 is attached by a swivel connection to the inner surface of the wall I2, whereby when the cap section has been disconnected from its threaded engagement with the barrel pulsating, collapsing and expanding movement may be 1mparted to the bulb or the purpose of securing a pumpingaction.

Connected with the cap section and extending axially through the bulb and into the upper end of the tube 7 is a guide stem 15. The upper end of this stem is headed as at 16 for connection with a disk 17 which is embedded in the wall 12 of the cap section, in order that the stem will constitute a unitary part of the cap section for the purpose of guiding and controlling the movement of said cap section. The connection between the stem 15 and the disk 17 in this instance is in the form of a key hole slot 17, the larger portion of which is to one side of the axial center of the pen. In registering the head 16 of the stem with the lar er portion of the key hole slot, the upper e ge portion of the bulb 13 will be slightly compressed against the side of the cap 10, thus when released due to the expanding nature of the rubber formin the bulb, the stem will be so positioned t atthe. head 16 of the stem will slide over the narrow portion of the key hole slot, thus forming a swivel connection between the cap 10 and the stem 15 permit-- ting of the rotation of said cap without twisting or distorting the bulb 13. Formed with the lower end of the stem 15 is helical convolutions 18 which, when the cap section is drawn to assume a position fully expanding the bulb, en ages with the hub 19 of a disk valve 20, t e hub 19 being connected with the body of the valve by means of arms 21. These arms are positioned for limited sliding movement within slots 22 provided in the enlarged upper end of the tube 7. Exteriorly the upper end of the tube is threaded for'the reception of a stop nut 23, which serves to limit the upward or opening movement of the valve when the latter is forced to an open position by theengagement of the convolutions 18 of the stem with the hub 19 of the valve.

The wall6 of the barrel is provided in this instance with a plurality of arcuate slots 24 which are normally closed by the valve 20 but which permit of communication for fluid flow between the chamber 5 and the interior of the bulb 13 when the valve 20 is raised by the movement of the cap section In the use of my device the accordion bulb is normally folded inside of the cap section 10, where it is concealed and protected. Then to fill the en with a writing fluid the point 2 is inserted into the ink or other fluid in the usual manner. The cap section is then unscrewed from enga ement with the barrel 1 and manually raise thus'expanding the bulb and creating a vacuum, causing through the pressure differential thus established a flow of the ink into the chamber 5 of the barrel and also into the tube 7. The raising of the valve 20 permits; air inflow from the barrel 1 into the bulb 13 so that when the cap section is then forceddownwardly it closes the valve 20 and preventsthe expulsion of the ink from the chamber 5 and forces the air within the bulb out through the open end of the tube 7 to the atmosphere. The cap section is then pulsated upwardly and downwardly until all air is driven out of the barrel and a complete filling with ink is secured. The valve lifting rod or stem 15 constitutes an improved feature of the present invention in that it serves to positively open the disk valve 20 for the purpose of establishing an even air pressure in all parts of the pen. The filler will operate without the valve operating rod or stem, but the action is slower and without Eositive assurance of constant reliability.

y adding the lifting rod speed in o eration is secured and in addition the possi ility of the valve sticking is eliminated. The lifting rod or stem also acts as a check and permits the bulb to be raised or expanded only to the re uired extent. Furthermore, the stem or ro operates to positively connect the removable cap section with the barrel of the pen.

What is claimed is:

1. In a fountain pen, a barrel provided with an ink receiving chamber, a cap section removably connected with the upper end of said barrel, a collapsible bulb secured to said cap section and the upper end of said barrel and formed to be disposed within the confines of said cap section when the latter is secured to said barrel, said bulb being in communication with said ink chamber through a restricted ort formed in one end of said barrel, and a va ve normally positioned to close said ort but responsive to the expansion of said Bulb to open said port and establish communication between the ink chamber and the interior of said bulb.

2. In a fountain en, a barrel formed to include an ink cham er, a bulb of collapsible material secured to one end of said barrel, there being a restricted port formed in one end of said barrel to establish communication between said ink chamber and the interior of said bulb, a valve normally positioned to close said port, and a member movable in unison with said bulb and arranged for co-operation with said valve to positively move the latter to a position opening said port when said bulb assumes a predetermined position of expanslon. Y

3. In a fountain pen, a barrel provided.

with an ink-chamber, a cap member removably connected with one end of said barrel, a bulb of flexible material connected with said cap member and with said barrel, the interior of said bulb being in communication with said ink chamber by means of a restricted port, and a valve normally positioned to close said port and responsive to the expansion of said bulb to admit of the opening of said port.

4. In a fountain pen, a barrel provided with an ink chamber, a cap member removably connected with one end of said barrel, a bulb of flexible material secured to said barrel and cap member, the interior of said bulb being in communication with said ink chamber by means of a restricted port, a valve normally closing said port and arranged to be opened and closed by the expansion and contraction of said bulb, and a tube passing through said ink chamber and in open communication at one end with said bulb and its other end terminating in the lower portion of the ink chamber.

' 5. In a fountain pen, a barrel formed to include an internal ink receiving chamber, a

cap member removably connected with the upper end of said barrel, a bulb of flexible material secured to said cap member and barrel, the interior of said bulb communicating with said ink chamber through a restrictwith an ink receiving chamber, a. cap section removably connected with the upper endof said barrel, a collapsible bulb secured to the upper end of said barrel and formed to be disposed in a collapsed position within the confines of said cap section, said bulb being in communication with said ink chamber through a restricted port formed in one end of said barrel, and a valve normally positioned to close said port but responsive toot-he expansion of said bulb to open said port and esta lish communication between the ink chamber and the interior of saidbulb.

In testimony whereof'I afiix my signature.

' FRANK B. GHAMBERLIN.

ed port, a valve arranged to open and close i said port upon the'expansion and contraction of said bulb, a tube passing through said ink chamber and establishing communication between the interior of said bulb andink chamher, and a guide stem secured to said cap member at one end and having its other end loosely positioned within said tube.

6. In a fountain pen, a barrel formed to include an internal ink receiving chamber, a cap member removably connected with the upper end of said barrel, a bulb of flexible material secured to said cap member and barrel, the interior of said bulb communicating with said ink chamber through a restricted port, a valve arranged to open and close said valve when said bulb assumes a predeter-' mined position of expansion.

'7. In a fountain pen, a barrel provided

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