US1904358A - Fountain pen - Google Patents

Description

April 18, 1933. A. o. DAHLBERG FOUNTAIN PEN 2 sheets-'sheet 1 Originl Filed Sept. 14. 1928 3 I.. i ai.. l.

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`Patented Apr. 18, 1933 I UNITED. STATES vPAT-awr: oFFl'cE ARTHUR 0. DABLBERG, F LAKE WORTH, FLORIDA, ASBIGNOB THE PABKB PEN COMPANY, OF JANESVILLE, WISCONSIN, A, CORPORATION OF WISCONSIN FOUNTAIN PEN Continuation of application Serial No. 306,009, filed. September 14, 1928. This application filed January Q4, 1933. Serial No. 653,346.

My invention relates generally to fountain pens and more particularly to filling means therefor.

rlihe principal objects of my invention are to provide: y

First: An improved filling device which may be easily operated with one hand;

Second: A flexible diaphragm to seal one end of the barrel, thereby to eliminate the possibility of ink leakage;

Third: A lling device in which most of the parts may be made oimetal and are kept from contact with the ink;

Fourth: A cap for the end oi the barrel, the cap being rotatably secured to the plunger oi' the filling device;

Fifth A cap which is automatically raised on the plunger as the cap is unscrewed from the barrel;

Sixth: A filling device which may be removed from the barrel as a unit;

Seventh: A lling device, the'parts of which may be easily manufactured andassembled;

Eighth; A filling ifeviee whieh iekee up only a relatively small portion of the interior of the barrel, thus permitting the utilization of a greater volume of the barrel as an ink reservoir; I .Y

Ninth: A filling device in which the diaphragm is wedged in place, thus insuring tightness without the use of cement or adhesive;

Tenth: A filling device in which the force of a spring is utilized on the suction stroke;

and

Eleventh: A filling device which is durable, may be economically manufactured, and

-mag be easily and quickly operated.

her objects will appear from the following description, reference being had to the accompanying drawings, in which Fig. 1 is a central longitudinal section of a fountain pen in which a preferred form'of the fillingV Fig. 2 is a similar view of the filling-device only, showing theparts in normal operating position; A

devlce of my invention is incorporated, showing the parts in'normal mop-- eratlve position;

'parts'in normal inoperative position;

Fig. 5 is a similar view showing the parte in normal operating position;

Fig. 6 is a central longitudinal section of a second modified form of filling device;

Figs. and 8 are transverse sectional views thereof taken on lines 7--7 and 8 8, respectively, of Fig. 6; z f

Fig. 9 is a central longitudinal section of a fountain pen infwhich a third modied form of filling device is incorporated, the parts being in normal inoperative position;

Fig. l0 is a similar view of the filling device shown in Fig. 9 with the parts thereof shown in operated position; and

Fig. 11 is a central vertical sectional view of a fountain pen with a fourth modified form of filling device, showing the parts in normal position.

The pen as shown in Figs. 1, 2 and 3 com-1 prises a barrel 12, the lower end of which is threaded to receive the usual section 14, into whicha feed bar 16 and pen point 18 are secured in the customary manner.

The feed bei hee e, longitudinal ink feeding in the patent to Taylor No. 802,668, dated,

October 24, art.

The upper end of the barrel 12 is closed by a pliable sealing member or flexible diaphragm 26 made of rubber or other. suitable material. The diaphragm has a frusto-conical portion 28 and a central portion 30 which is preferably made thicker than the portion 1.905, and are well known in the 2.8V and hasva shallow annular groove 32 formed therein to receive an inwardly extending annular ange 34 of a tubular plunger 36. u'Ihe portion 28 Yof the diaphragm is Joined to the central portion 30 by an annular trough shaped portion 37 which forms an initial bend in the diaphragm to aid in causing the diaphragm to roll freely upon itself as will more fullyappear hereinafter'.

'lhe outer edge portion of' the diaphragm is pressed or clamped against a tapering an-' nular shoulder 88 formed in the barrel 12 by the complementally tapered ring portion 40 ci a. sleeve 42.

The sleeve 42 is forced into the barrel by an annular nut 44 which is threaded in the end ol the barrel and engages a shoulder 46 on the sleeve 42. rl`he nut 44 has heris 48 to receive a Spanner wrench. The nut is preferably screwed into the barrel a sucient distance so as'to he slightly beneath the end oi the barrel. The sleeve 42 has an annular shoulder 50 at the upper end of the tapered portion 40 which is oi substantially the same diameter as the inside of the barrel and thus prevents the portion 28 of the diaphragm romsliding upwardly on the wedge portion 40 when the diaphragm and, sleeve are being insert/ed into the barrel.

rlhe wedge portion 40 has a tapered bore 52 to provide clearance for 'the diaphragm when it is at the upper end ol its stroke.

'lhe plunger 36 has a plurality or narrow open end slots 54 cnt in its upper end, the tongue portions between the slots having small outwardly extending heads or ianges 56 formed thereon. rlhese `langes project into an annular groove 58 undercut in a cap 60, or, as shown, formed at the end or a bushing 62 which is pressed into the ca The lower end of the cap is internally t readed and adapted te he screwed upon the end of thel sleeve 42.

A compression coil spring @4 is confined between the end wall of the cap 60 and a pin 66 which passes through longitudinal slots 68 formed in the plunger 36 and the ends of which restin suitable' holes drilled in the l sleeve 42. The pin is sufficiently long so that it is conned against appreciable longitudinal movement by the wall the barrel l2. rlihe slots 68 preferably project a short distance below the top surface ol the central portion 30 of the diaphragm so that the latter may serve as a cushioninr butler against pin 66 to limit upward movement of the plunger.

The operation of the filling device is as follows:

The cap 60 is unscrewed from the end of y the sleeve 42 swiveling on the plunger 86,

whereupon the spring 64 willL force the cap and plunger outwardly until the lower ends of slots 68 abut against the pin 66 as shown in Fig. 2. The pen point is hen inserted in an ink well and the plunger rapidly reciprocated, preferably by the index nger to the top of the f. grasping the barrel between the thumb other fingers.

` Lacasse i `During the downward stroke against the pressure of the spring the diaphragm will roll upon itself from the position shown in Fig. 2 to a position substantially as shown in Fig. l, displacing a certain amount of air which is ejected through the tube 24, duct 22 and lower portion 20 of the ink groove. Upon relieving the linger pressure on the cap 60, the spring will force the plunger upwardly, causing a partial vacuum within the barrel and consequently dow of ink into the barrel under atmospheric pressure. The ink will. enter the barrel through the ink groove 21 or through both the ink groove 2l and air tube 24, depending upon the degree of vacuum produced.

Buring the initial portions ofthe second and subsequent depressions of the plunger, the pressure in the barrel will be raised above atmospheric and the inlr which stood in the air tube 24 (at approximately the same level as the inlr in the barrel) will be ejected. At this time a certain volume of ink will be forced from the barrel through the ink groove 20, 2l but due to the fact that there is Iainuch smaller quantity ol ink in the tube 24 and duct 22 than in the barrel, the ink will be exhausted from the former before an appreciable volume of ink has escaped from the barrel through the groove 20, 2l. lUpon continued downward movement of the plunger' after the inl( has been exhausted from the tube 24 and duct 22, the air in the barreh due to its much greater duidityywill he, forced from the barrel through the groove 20, 2l much more rapidly than inlr is ejected. 'Ehe ratio ol air and ink ejected from the barrel is dependent upon the speed of the depression stroke of the plunger.

'lhe fact that the cross sectional area of groove 20, 2l is less than that of the tube 24 and duct 22 y (and consequently its resistance to dow greater is a factor which aids in reducing the proportion of inlr expelled upon each depression of the plunger.

That the barrel is full of ink may be sensed because correct pressure is required to oper ate the plunger and also because air is no Ylonger ejected from the pen point.

During the reciprocation of the plunger the diaphragm 26, dueto the way in which it is secured to the barrel and to the plunger and also due to its exibility and resiliency, will not buckle or fold but will roll smoothly from one end of its stroke to the other. The

,sleeve 42has a sufficiently-long guiding surltlm level ol the end ot the barrel, manipulanecessary to rotate the diaphragm when inserting it in the barrel and since the ange 50 prevents the diaphragm from slipping up.

wardly on the wedge 40, 4theproper positioningof the diaphragm is assured.

in Figs. 4 to 10, inclusive, 1 have illustrated various modifications of my invention, and since the modified structures in construction and operation are generally similar to the device above described, have applied similar reference characters to corresponding parts and will hereinafter point out and particularly describe only the parts and features in which the modifications differ from the structure shown in Figs. 1, 2 and 3.

The modification shown in Figs. 4 and 5 is provided to overcome aJ seeming disadvantage of the structure previously described in that the downward stroke of the plunger of the latter is limited by the contact of the lowermost thread in the cap with the uppermost thread on the sleeve 42, thus decreasing the` plunger displacement and increasing the number of strokes necessary to lill the barrel.

ln the modification (Figs. 4 and 5) the plunger 70 has a portion 72 of increased diameter which is threaded in a bushing 74 fixed in a cap 76. The upper end of the plunger is closed and has a laterally extending annui -.r flange 78 which is of greater diameter than the inside diameter of the bushing 74.

As shown in Fig. 4, the bushin 74 is normally threaded over the'end o which is held inthe barrel by a nut 82. p

When the cap 76 is unscrewed from the sleeve it will simultaneously unscrew from the plunger also. Continued rotation of the cap after it is released from the threads of the sleeve will raise lthe cap further relative to the plunger. This upward movement of l-the cap is limited by the abutment of the flange 78 with the upper end of the-,sleeve 74 as shown in Fig. 5. With the parts in this position a longer plunger stroke is possible,

since the plunger may move a distance equal to the full length of the slots 68 in the plunger, and is not limited by thevabutment of the threads in the bushing' 74 with the threads on the sleeve 8 0.

In the modification shown in Figs. 6, 7 and 8 the bore of sleeve 84 tapers. outwardly at its upper end and plunger 86 is complementally sleeve ved to receive a cover cap tapered at 88 so that the plunger may be wedged into the sleeve and thus held in its lower position after. completion of the filling operation. The angle of the taper on the sleeve and on the plunger is such that it requires a little more than the ordinary operating pressure to wedge the plunger tightly in the sleeve. n

' The pen shown in Figs. 9 and 10 comprises the usual barrel 90, the lower end of which is threaded to receive a plug 92. A feed bar 94 is fitted in the'plug and has a channel 96 formed therein beneath the pen point. An open end tube 98 communicating with .the

channel 96 and having a small ink port 100 is xed in the upper end of the feed bar so as to extend coaxially with the barrel 90.

A shoulder 102 near the upper end of the tube 98 provides a seat for a disc 104 which may have a plurality of notches 106 in its periphery or be otherwise suitably apertured to permit ink to flow freely from the upper to the lower portion of the barrel. c

A conical helical spring 108 is slightly compressed between the disc 104 and the end of a piston 110 which may be suitably recessed as at 112 to hold the spring in position. The disc aids in centrally supporting the air tube 98 and in this construction thev recess in the end of the finger piece, lplunger y or actuating stem 120. l

VThe skirt portion of the sealing member 118 is bent back upon itself as indicated at 122 and is cemented or otherwise suitably secured to the outer surface of a guide sleeve 116 over which a hollow frusto-conil l 124' which is threaded in the upper end of the barrel and is provided with a guiding shoulder 126 which also serves as a limiting stop' through its engagement with the complementary circumferential projection 128 on the stem 120. This method of sealing the plunger in the barrel eliminates the necessity l of askets or fluid tight sliding fits and makes lea age from the upper end of the barrel irnpossible, reasonable care a sealing member -made of the proper quality of rubber will outlive the useful life ofthe pen.

T he upper end of the sleeve 124 is threadsince it has been yfound that with' 130, which protects the stem 120 4against accidental reciprocation.

The spring 108 ispreferably to prevent itsV corrosion by the ingredients 1- 1t godpaedla of the ink. Due to the rubbing action between the coils of the spring and against the walls of the barrel, the gold plate (which for practical reasons must be very thin) will normally wear away in spots in a relatively short time. l preclude this possibilityby fixing small globules 132 of solder or other suitable material at short intervals along the spring Wire. These globules prevent contact of the gold plate of one turn of the spring wire with that of the adj acent turns, the barrel wall, or the air tube 98.

rThe operation of the modified structure of Figs. 9 and l0 is similar to that of theA filling devices previouslyv described. 'llhe piston l1() with its ring 114. is practically air and ink tight so that the. displacement per unit length of plunger stroke is slightly greater in this modiicationthan in the structures previously described.

The ink aperture 100 is spaced a short distance above the lower end of the barrel so that a small quantity oi" ink will be retained in the barrel at all times, thus aiding in the preservation of the rubber parts by keeping them moist, and preventing the inlr from drving up and clogging the passageways.

ln Fig. 1l, l have illustrated a. modiiied construction of the sealing member and the related parts. ln this embodiment Vthe sealing member 5l has its edge held against a tapering surface 53 ot' the barrel by a wedge shaped ring 55, Rubber cement is preferablv used tn holdthese parts in position 'to make an impervious seal.. A telescoping member or sleeve 57 lits freelyT over theend of the tube and has a shell 59 or other suitable abutment formed integrally therewith. t helical spring 6l is compressed between the shelf 59 and a disc 63 which is secured toor formed integrally with the tube l5, tending normally to hold the sleeve in its upper position. A plunger or hnger piece is `guided in a head 67 which threads into the end Aoi the barrel, preferably having left hand threads.A rllbe lower end of the linger piece engages the central portion of the sealing member 5l, pressing it into a shallow socket. 69 inthe upper end of the sleeve 57, thus maintaining these parts in alignment.

The piece has a. tritato-conical surface 67 adjacent its lower end toY provide a backing or support for the sealing member when the finger piece is depressed, and also to provide a shoulder which abuts the annular inward projection 69 on the head t? to limit the upward movement of finger piece 65 and consequently that of tbc sleeve 57 and the sealing member 5l. lf desired, the sleeve 57 may be provided with a plurality o? tures to facilitate thev admi tu the end of the tube 15 auf? t.; y to flow therefrom more frech., In this embodiment the neonata course, tends to lengthen its life. The dif-- ameter of the threaded portion of the head 67 over which the cover cap 7l is screwed is of smaller diameter than the threaded portion which screws into the barrel. rlhis construction makes it easy to unscrew the cover cap withoutunscrewing the head from the barrel because -a greater turning moment is exerted at the threads engaging the cap than at the threads engaging the barrel.

This application is a continuation of in application, Serial No. 306,009' led Septemher 14, 1928, entitled Fountain pens which application in turn is a continuation in part of my application, Serial No. 149,817 filed November 22, 1926.

While l have shown and described particular embodiments of my invention, it will be apparent to those skilled in the art that numerous variations and changes may be made without departing from the principles thereof, and l therefore wish my invention to embrace all such changes,4 variations, modifications and substitutions as will naturally suggest themselves to persons skilled in the fountain pen art.

- lVhat is claimed, is: l

l. ln a fountain pen having a barrel, a leed bar secured to one end ot said barrel and having inlr` and air passageways formed therein, an air tube connected with said air passageway and extending a substantial distance into said barrel, and filling means located in the other end of' said barrel coinprising a reciprocable plungergiaJ spring tend ing to urge said plunger outwardly, and a pliable sealing member having its peripheral edge iXed relative to said barrel and having its central portion engaged hy said plunger and adapted to be reciprocated thereby.

2. ll'n a fountain pen having barrel, a feed bar secured in one end oz' barrel and having ink and air passageways formed therein, an air tube connected with said air passageway and extending substr-tial clistance into said barrel. and filling for said barrel comprising a reciprocahle plung er, a. spring tending to urge plunger outwardly, means to limit the reciprocatiu movement of said plunger, and a plif bl ing member having its peripheral relativefto said barrel and having portion engaged by said plunger ancy to be reciprocated thereby.

3. ln a fountain pen having a barrel ing as an ink reservoir, a leed bar secured one end of said barrel and having l air ducts formed rein, means to ni air passageivaj with s and extending le' fr tid Y l' .ance into said i uid reservoir cc'rng, the other end et s :fr r iser carried by s acress the end ci. s

n VB las,

vpressures greater and less than atmospheric in said barrel, said last named means comprising a pliable normally conically-shaped element fixed relative to said barrel to close one end thereof, means to turn said conical element inside out, and resilent means to return said element to normal position.

5q In a fountain pen, the combination of a barrel, a feed bar carried in said barrel and having a passageway for airand for ink, means for conducting air from a point adjacent the end of the barrel opposite said feed bar to'said passageway, and. means for alternatively creating sub and super atmospheric pressuresin said barrel, said last named means comprising a flexible diaphragm mounted at the other end of said barrel, manipulative means for moving the central part of said diaphragm inwardly, and resilient means for moving the central part of said diaphragm outwardly thereby to vary the pressure within the barrel.

6. In a fountain pen, the combination of a barrel, a sleeve secured in the end of said barrel. said sleeve having an end portion spaced from the walls of the barrel, a iiexible diaphragm fitting over-the end of said sleeve and secured thereto, the greatest external diameter of said diaphragm being less than the least internaldiameter of said barrel, whereby said sleeve and diaphragm may easily be removed from said barrel as a unit, and 'manipulative means guided in said sleeve 'and removable therewith, said means being adapted to move a portion of said. diaphragm to and fro. 7. A. self filling fountain pen comprislng a barrel having a feed bar secured in one end thereof, .said feed bar and an air passageway associated having an in therewith,

- said air passageway extending a substantial distance longitudinally said filling means comprising a' flexible diaphragm, a manually reciprocable member connected to the central portion of said diay8. In a fountain pen l'filling device, the

of said barrel, and' barrel filling means at the other end thereof,

U 16.: In a fountain pen combination of a sleeve, a pin passing diametrically through said sleeve, a reciprocable plunger guided in said sleeve, and a ilexible diaphragm having its peripheral edge secured relative to said sleeve and its central portion attached to said plunger.

9. In a fountain pen filling device, the combination of a sleeve having a threaded end, a reciprocable plunger guided in said sleeve, a flexible diaphragm having its edge encircling said sleeve and its central portion secured to said plunger, secured to said plunger and vhaving a threaded bore cooperable withthe threaded end of saidsleeve.

10. In a fountain pen, the combination of filling means, a plunger for operating said filling means, a threaded portion near the end of said plunger, externally threaded means for guiding said plunger, and an internally threaded cap screwed over the threaded portions of said plunger and said guidin means.

l1. n a' fountain pen, the combination of a barrel, filling means in said barrel, a plunger for operatin said filling means projecting from the en of said barrel, a, cap threadedly joinedl to said plunger and barrel andY of, a pin, a spring between said pin and plunger, and integral-means for guiding said plunger, carrying said pin and supporting the peripheral edge of said diaphragm. 14. In a fountain pen filling of, a threaded cap rotatably secured to said plunger, and integral means for guiding said plunger, supporting the peripheral portion of said diaphragm, and havin threads cooperable with the threads in said cap.

115. In a fountain pen, the combination of a barrel, a filling device, la. plunger for operating said filling device and proJecting from the end of said barrelfsaid plunger having a plurality of open end slots and an outwardly projecting flange at its outer end,

device, the,l combinationV of a flexible dlaphragm, a k plunger attached to the central portion thereand a cap rotatablyy ured to the central portion thereand a cap adapted to be attached to the en d of said barrel, said' cap having an undercut annular groove to receive the flange on said plunger.

having a barrel, fillsaid barrel and havin ing means comprising a reciprocable plunger, a spring tending to ur e said plunger outwardly, and a pliable lmperiorate member having its peripheral edge fixed relative to its central portion adapted to be actuated y said plunger.

17. ln a fountain pen having a barrel, lilling means therefor comprising an element manually operable in one direction, a spring for moving said element in the opposite direction, and a dexible member closing the end of said barrel, said member being adapted to be moved to and i'ro by said element.

18. ln a. fountain pen filling device, the combination of a sleeve, a reciprocable plunger guided in said sleeve, a Herible diaphragm having its edge surrounding said sleeve and its central portion engaged by said plunger, a cap carried by said plunger, and cooperative quick detachable connecting means on said sleeve and on said cap. l

i 19. ln a fountain pen falling device, the combination of a flexible diaphragm, a plunger for reciprocating the central portion of said diaphragm, a spring for urging said lunger in one direction, and integral means or guiding said plunger, supporting the edge of said diaphragm and one end ci said spring.

20. In a fountain pen lling device, the combination of a barrel, a sleeve secured in the upper end of said barrel, a plunger reciprocable in said sleeve, and a flexible dias phragm having portions held by said `sleeve and said lunger, respectively, said sleeve and plunger having interengaging vvedging suriaces whereby said plunger may be hned in said sleeve.

2l. ln a fountain pen, the combination of s barrel having a shoulder adjacent one end thereof, filling means comprising a flexible diaphragm having its peripheral edgeseated against said shoulder, a sleeve for pressing said edge of said diaphragm against said shoulder, a plunger for moving the central portion of said diaphragm to and fro` and a nut rotatable relative to said sleeve and threaded in the end of said barrel to force said sleeve into said barrel.

22. ln a fountain pen, the combination of a barrel having a sloping annular shoulder at one end thereof, a dexible sealing member having its peripheral edge resting on said shoulder, a sleeve having a surface complemental to the surface of said shoulder and arranged to press the peripheral edge of said diaphragm against said shoulder, and a nut swiveled on said sleeve and threaded in the end of said barrel and adapted to force said sleeve inwardly thereby to clamp said diaphragm in said barrel.

23. In a fountain pen having a barrel serving as an ink reservoir, means for filling said barrel comprising a sleeve secured at the end of said barrel, a pliable sealing member con- Lacasse lined Within said barrel, said member being fastened to said sleeve, being of slightly7 lesser diameter than the internal diameter of the end of said barrel and removable from said barrel With said sleeve, said sleeve and member closing the end of said barrel, and means to move a portion of said' member to and fro to create did'erential pressures in said barrel.

24. lin a fountain pen having a barrel serving as an ink reservoir, a feed bar secured in one end of said barrel and having ink and air passagevvays formed therein, an air tube communicating with said air passageway and extending into said barrel, and means for creating pressures in said barrel alternately greater and less than atmospheric pressure, said means comprising a substantially conical sealing member closing the other end of said barrel, means to hold the edge portion ci said member stationary relative to said barrel, means to move the central portion ofsaid member to and iro to cause the intermediate portions of said member to roll freely relative to one another, thereby creating difierential pressures said barrel, and a spring to move said last named means in one direction.

25. ln a fountain pen having a barrel, a feed bar secured in one end ci said .barrel and having ink and air passagevvays formed therein, an air tube communicating with said air passageway and extending into said barrel, and means for creating pressures in said barrel alternately greater and less than atmospheric pressure, said means comprising a substantially conical diaphragm secured Within the other end of the barrel and having its edges fixed relative to said barrel, said diaphragm being capable ci rolling freely 'upon itself and turning inside out to vary the effective volume of said barrel when the central portion of the diaphragm is reciprocated, means for moving the central portion oi said diaphragm in one direction, and resilient means to move said central portion in the opposite direction.

26. lin a fountain pen filling means, the combination of a barrel forming an ink reservoir, a feed bar secured in one end of said barrel and having ink and air passageways formed therein, an air-tube communicating with said air passageway and extending into said barrel, and means for creating pressures in said barrel alternately greater and less than atmospheric pressure, said means comprising'a lexible diaphragm having its peripheral edge fixed relative to said barrel, a manually reciprocable plunger engaging the central portion of said diaphragm, means to limit the stroke of said plunger sufiiciently at all times to maintain a bend lll-shaped in cross section in said diaphragm, and resilient means to move the central porti on ofI said diaphragm in one direction. V-

p 27. ln a fountain pen filling means, the

' combination of a barrel'forming an ink reser- 'air from said barrel, and a compression spring surrounding said tube and compressed upon inward movement of said plunger.

28. In a fountain pen filling device, the combination of a barrel forming an ink reservoir, a tube providing a passageway for the dischargeI of air from said barrel, a plunger reciprocable in said barrel and guided partially by said air tube, a flexible diaphragm having a portion fixed relative to the walls of said barrel and a portion movable with said plunger, and a spring surrounding said air tube and operative to move said plunger outwardly.

29. In a fountain pen filling device, the combination of a fleXi-ble diaphragm, a plungy er for reciprocating the centrai portion of l moved in the opposite direction.

said diaphragm, a spring for urging said plunger in one for guiding said plunger and supporting one end of said spring, said means Ibeing connected to said plunger and the central portion of said diaphragm. y

30. In a fountain pen filling device, the combination of a barrel forming an ink reservoir, a dexible diaphragm having its edge fixed relative to said barrel at one end thereof, manually operable means for moving the central portion of said diaphragm inwardly, aspring for moving the central portion of said diaphragm outwardly, and a rigidmeinber interposed between said diaphragm and said spring-and adapted to transmit the force of said spring to said diaphragm.

31. In a fountain pen filling device, a barrel forming an ink reservoir, aA diaphragm closing one end of said reservoir for varying the pressure therein, from the pen point end of said barrel 'to a point adj aoent the other end of said barrel, a spring within said barrel to move a portion of said diaphragm in one direction, and guide n means fitting around said air tube, said means engaging said spring Vand adapted to be moved thereby in one direction and manually 32. A fountain pen comprising a barrel, a plunger reciprocable therein, a spring urging said plunger outwardly, a channeled feed bar fitted in one end of said barrel, a tube extending inwardly from said bar andhaving its passage-communicating withthe channel of said bar, and an apertured member carried by said tube adjacent its inner extermity, contacting with the walls of-said bar- Y. Yrel and serving as a .seat

for said spring.

33. In a self-filling fountain pen having a reservoir barrel, a reciprocable member for direction, and integral means an air tube extendingstroke of said plunger.

endof said barrel and having ink and air l passageways formed therein, an air tube extending into said barrel, bar and communicating with said air passageway; and 'filling means at the other end of said barrel, said means comprising a siidable plunger having a stem, a spring urging said plunger outwardly, :a conical sealing member closing the end of said barrel and normally tting over said stem, and a reeipi rocable finger piece protruding from the end of said barrel and having its inner en'd engaging said may be depressed, causing said member to be unfurled from said stem and thereby vary the effective volume of said barrel.

35. In ya fountain pen having al barrel, means for varying the pressure in the barrel comprising a spring returned plunger recipr'ocable in said barrel, a plunger stem, a flexible tapered 'sealing member secured to said barrel and normally tted, to said stem',

securedto said feed 1 member, whereby said plunger` and a recessed finger piece adapted to engage the end. of said stem whereby'said plunger may bedepressed.

36. In a device of the class describedthe combination of a cylinder, an element reciprocable therein, a coil spring within said cylinder for moving said element, and a plurality of globules of solder secured to said pring lto form lateral bearing points there- 37. In a device of the class described, a liquid receptacle, a plated coil spring therein,

and means to prevent abrasion of the plating from said spring comprising a plurality of globules of a soft metal spaced along saidv spring. l

38. As an article of manufacture a plated coil spring havingdrops of a bearing metal fixed at intervals of its length to prevent.

abrasion of the plating.

39. In a fountain pen, the combination of a barrel having a male threaded part at the end thereof, filling means inl said`barrel, a plunger for operating said filling means pro-- jecting from the end of said barrel and having a male thread at the proiecting end thereof, and a cap loosely threaded on the threaded end of said plunger and on the threaded part of said barrel, whereby unscrewing said cap from vsaid part will result in simultaneously unscrewingthe cap lrelative to said plunger thereby t'o lengthen the effective 4|0. Afountain pen comprising ay barrel,

a feed bar having ink feeding and air conducting passageways formed therein and secured lin one end of said barrel, an air tube communicating With said air passageway and extending Within said barrel substantially the length thereof, and means at the other end of said barrel for alternately creating pressures greater and less than atmospheric pressure within said barrel, said means comprising a flexible cup having its open end iixed relative to said barrel, a manually engageable plunger for deiorming said cup to expel the contents thereof, and a spring for' moving said plunger in one direction.

lll. A :fountain pen filling device of the character adapted to bet inserted in and removed from the fountain pen barrel as a completely assembled unit comprising Aa diaphragm adapted to be expanded and collapsed, a plunger for actuating said diaphragm, spring means to move said plunger in one direction. means for supporting' said diaphragm, said plunger and said spring means, ,and means adapted to engage the barrel ci a fountain pen for locking the fillingy device in operative position therein.

d2. A filling device for fountain pens of the type adapted to be detachably secured in the barrel oi a fountain pen comprising a ilexible diaphragm, a member for supporting the peripheral edge portion of said diaphragm, a plunger guided by saidv member and secured to the central portion of said diaphragm, resilient means for moving said plunger in one direction., and means for detachably securing said member, diaphragm,

plunger and resilient means in the end of a barrel of a fountain pen, said securing means being operative to force said member and parts associated therewith into the barrel of the fountain pen by a translational movement relative to the barrel of the fountain pen.

e3. ln a fountain pen .having a barrel, fillin means therefor which comprises a flexible member sealing one end portion of the barrel, a ring member cooperating with the inner Wall of the barrel to secure said flexible member in place, a plunger member attached 'to said sealing member for flexing the same to vary the air pressure in said barrel, resilient means for returning the plunger to its normal position, and another member threadedly engaged with the barrel at said one end and guiding the movements of said plunger member. f

all. ln a ountain'pen having a-barrel, ll-

' ing means therefor which comprises a exible member sealing one end portion of the barrel, a ring membershaped for'wedge-engaging said 'exible member with the inner Wall of the barrel, and another member threadedly engaged with the barrel, at said one end and adapted to force said ring mem- Lacasse ber into and hold it in its said wedge-engaging position. d5. A lling mechanism adapted to be inserted in the barrel of a fountain pen which comprises a plurality of parts interconnected to orm a self-contained unit with the parts thereof adapted to be held operatively connected when in or when removed from said barrel, said parts including a diaphragm member adapted to seal one end of said bar 75 rel, a support therefor, and an actuator. con- .i

nected to said diaphragm member. l 46. ln a fountain' pen, a barrel and filling mechanism adapted to'be mounted therein which comprises a reciprocable plunger member, a guide for said plunger, means cooperatively connected to said plunger member for varying the air pressure in said barrel, and means located between said plunger member and said guide and selectively effective under the control of the operator for holding said plunger member in an inwardly-reciprocated position.

47. lin a fountain pen, a barrel and filling mechanism adapted to be mounted therein which comprises a reciprocable plunger member,`a guide for said plunger, means cooperatively connected to said plunger member and said guide, :for varying the air pressure in said barrel, and means betweensaid plunger membefnand guide adapted in an inwardlyreciprocated position of said plunger member to hold said plunger in such inwardly reciprocated position.

48. A self-contained filling mechanism adapted to be inserted in the barrel of a fountain pen .which comprises an extensible memberl for'. closing one end of said barrel and for varying the air pressurevin the barrel,

a support for said member, a plunger connected to said member for extending the latter, and means releasably engageable with the barrel securing said member, support Aand plunger in the barrel, said member, supportv and plunger being so interconnected that they may be'vvithdrawn -from the barrel as a unit upon release of said means Without breaking their operating relationship.

49. ln a fountain pen, a barrel filling mechanism therefor comprising an extensible .fa cap threadedly part and' shielding ,irel and the structure 50. In a fountain pen, a barrel, filling 125 mechanism therefor comprising an extensible member closing one end portion of said barrel, means :fixing said member `relative to the" barrel Wall at said one end, a plunger member for extending said extensible member,resil 13o r and having a proient means for returning the plunger member to its normal position, means guiding said plunger and having a projected threaded part, and means for holding said plunger in 5 position with said extensible member extended.

, 51. A filling mechanism in the form of a self-contained unit adapted to be inserted in and removed from the barrel of a fountain l pen which comprisesa flexible member adapted to span and seal' the barrel adjacent one end thereof, a support for said member, an exteriorly accessible plunger reciprocable for flexing said member to vary the air pressure l in the barrel, and means self-contained withto return the plunger to its projected open position and a rotatable connection between said plunger and barrel whereby the plunger may be locked to the barrel when in its depressed condition following the filling operation.

In testimony whereof I aiiix my si nature.

ARTHUR O. DAHLB RG..

in said unit for limiting the reciprocating movement of said plunger.

52. In a fountain pen having a barrel, filling means therefor comprising a reciproeating pump adapted to be manually actuated, means tending normally to return the ump to its projected position and means or locking the pump to the barrel in its retracted position following the filling operation.

53. In a fountain pen, in combination, a barrel, a reciprocating plunger for filling the same, means for returning the plunger to its Yprojected position following the depressionv thereof and means for securing the plunger relatively to the barrel in its depressed condition following the fillingoperation.

54. In a fountain pen, in combination, a Y barrel, a flexible diaphragm located therein,

i 6 a reciprocating plunger for moving said diaphragm back and forth for filling the pen, spring means for urging the plunger in a projected position and means for securing the plunger to the barrel in its depressed position following the filling operation.

' 55. In a fountain pen,vin combination, a barrel, a flexible diaphragm situated therein, a plunger adapted to be moved back and forth for actuating said diaphragm whereby 5 to fill the barrel and interlocking means associated with the plunger and barrel, respectively, for locking .the plunger to the barrel in its depressed position following the lling operation.

56. In a fountain pen, in combination, a barrel, filling means for said barrel, comprising a diaphragm, a plunger operatively secured to said diaphragm for moving the same repeatedly whereby to fill the barrel, means tending normally to return said plunger to its projected position and meansadapted to lock the plunger relative to the barrel when in its depressed condition, said last mentioned means including a. rotatable 0 connection.

57. In a fountain pen, in combination, a barrel, a flexiblel diaphragm disposed therein,

a plunger connected to said diaphragm and adapted to be moved to and fro whereby to 05 fill the pen, resilient means tending normally

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