US2092459A - Fountain pen - Google Patents

Description

Sept. 7, 1937.

L KUTTER FOUNTAI N PEN Filed Sept. 5, 1935 Fig.

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Patented Sept. 7, 1937 I I UNITED STATES PATENT OFFICE,

FOUNTAIN PEN Leopold Kutter, Vienna, Austria, assignor of onchalf to Roman Heller, Vienna, Austria Application September 3, 1935, Serial No. 39,011 In Austria September 15, 1934 2 Claims. (Cl. 120-49) Fountain pens are already known consisting of to the known arrangement with leaf spring, Figs. two telescopically slidable tubes in which a closing 1 and 2 being longitudinal sections with the nib flap on the outer tube is automatically opened retracted and pushed out respectively, and Fig. 3 and closed when the inner tube is pushed out being a longitudinal section of the middle part 5 or retracted, by means of a member actuated by of the holder on a larger scale in the position 5 the innertube and engaging the flap. In such shown in Fig. 1. i an arrangement it is necessary for the inner The fountain pen consists of the outer tube i tube, which is retracted in the outer tube up to and the inner tube 2. The outer tube has a cloa stop, to be secured to some extent against besure cap 4 which can swing at 3 and which in ing pushed forward so that the closure flap is the closed position bears on a packing 5. The 10 held closed by means of this actuating member. closure cap is controlled by a leaf spring 6, with This arrangement is necessary, more especially an end 1' in the form of a lug which engages the in a fountain pen in which the end of a curved cap 4 excentrically at 8 and is guided in a lonleaf spring engaging the closure flap excentricalgitudinal groove 9 of the outer tube ly cooperates with a transverse notch and ad- The inner tube 2 contains the known ink resjoining longitudinal groove which have hitherto 'ervoir, which is not illustrated, and has at its been worked in a metal sleeve pushed on the end the known ink guide it and the nib ll.

inner tube. This metal sleeve is also provided The transverse notch l2, with adjoining lonwith resilient ridges which, when the inner tube gitudinal' groove l3 serving for controlling the is completely retracted, engage behind an offset a leaf spring 6. and with it the closure cap 4, is 20 part of the outer tube and prevent displacement, worked according to the invention, in the nonwhen the end of the movement of the inner tube metallic material, for example, vulcanite of which has-been reached on account of a pin projecting the inner tube 2 is made. Moreover, at the secout of the inner tube striking against the end of and end of this longitudinal groove a transverse the groove of the outer tube. notch i4 is formed in the material of the tube 25 This metal sleeve or other necessary metal for a purpose tobe described below. parts are, however, complicated in manufacture The new arrangement for securing the inner and assembly, and also they have great disadtube 2 when completely retracted within the outer vantages for permanent satisfactory operation tube I, consists of an annular groove l5 arranged of the fountain pen because they are attacked preferably at a thickened part 28 of the tube 2 0 by the ink which easily reaches them from the and in which resilient members on the outer nib, so that the displacement of the tubes and tube I can engage. These resilient members in the springing of the parts is detrimentally afthe example illustrated consist of balls I! (see fe'cted. It would be much too expensiveto manmore particularly Fig. 3), which are mounted ufacture the sleeves or other large metal parts in cavities "of the outer tube from the outside 35 from suitable noble metal. in such a manner that they cannot fall out on The present invention avoids these disadvanthe inside. The balls are surrounded on the tages by dispensing with this metal sleeve or outside by a common freely springing ring ll other large metal parts and providing a securing which forces them inwards and is deformed re- 40 device for the inner tube when retracted in the siliently by pressure from inside. outer tube up to a stop, consisting of an annular The balls I are mounted in cavities in a short groove provided on the inner tube inwhich resleeve It, in order to fulfill a particular m mse, silient members are arranged on a sleeve which the sleeve being screwed into the outer tube I can be screwed on to the outer tube which also at 25 in such a manner that the free springing forms the'stop for an oifset part of the inner of the ring it arranged between the two parts I, 45 tube and satisfactorily limits its movement. I9 is not affected. The sleeve ll further has a Further, the resilient members are preferably smaller internal diameter than the tube I. This formed from balls which are embraced together results in an internal offset part 2. which serves by a freely springing ring. when a leaf spring for obtaining a limitation of movement of the engaging with the closure cap is provided the two tubes, I, 2 when the inner tube 2 is re- 50 transverse notch and longitudinal groove are treated since an offset part II of the inner tube .worked in the non-metallic material, such as I strikes againstit, which offset part is formed vulcanite or the like, which forms the inner tube. by a further thickening of the tube 2, preferably The accompanyingdrawing illustrates a conalong a suitable length If so that the tube 2 slides structional example of the invention as applied smoothly in the tube 1 and also the leaf spring 55 6 can be pressed flat, as will be clear from the further description.

The two tubes I, 2 are prevented from rotating by a straight line guide, a pin 23 on the inner tube 2 engaging in a covered groove 24 or an open slot in the outer tube 1. This pin has hitherto been made of metal and has been inserted in the groove 24 laterally from the interior of the tube I through a lateral opening. The groove 10 24 has been closed at both ends by the material of the tube 2, or otherwise, so that the pin 23 can strike against both ends in order to limit the movement of the tubes I, 2.

According to the invention the pin 23 strikes the end of the guiding groove 24 only when the pen is pushed out (Fig. 2). When the tube 2 is completely retracted (Figs. 1 and 3) the movement of the two tubes I, 2 is limited, not by the parts 23, 24, but by the stops 20, 2|. It is therefore also possible to arrange the pin 23 rigidly on the inner tube 2 and if desired to make it from the same material as the tube. The guiding groove 24 extends to the end of the tube I, that is up to the beginning of the thread 25, and there- 25 fore, when the sleeve I9 is screwed oil, the tube 2 together with the fixed pin 23 can be pushed into the tube I, because the pin can enter the groove 24 at the open end.

The mode of operation of the pen is known in the basic feature.

When the tube 2 is completely retracted (Figs. 1 and 3) its movement is limited by the stops 20, 2| and the balls I6 acted upon by the spring ring l8 enter the annular groove l5 of the thickened part 26 and secure the inner tube against displacement with a certain amount of force. In this way an undesired opening of the closure cap 4 is prevented because the end I of the leaf spring is thereby somewhat stretched and the notch is provided on the inner tube which is held fast.

When the tube 2 is pushed out, which is not possible only by using a certain amount of force in order to lift the balls l6 outof the groove IS, the closure cap 4 is first opened by means of the leaf spring 6. The lug I at the end of the spring moves out of the notch l2, slides into the groove I3 and finally enters the second notch 14 'at the end of the movement of the tubes l, 2 (Fig. 2) determined by the pin 23 and groove 24 or by the abutment 32. By this engagement the tubes I, 2 are held, with a certain amount of force, against a retraction of the tube 2, so that an undesired retraction of the nib by the pressure used in writing is not possible. The balls l6 slide on the part of the tube which is not thickened so 4 that the spring ring I8 is stretched somewhat and the pressure of the balls is smaller.

When the tube 2 is retracted the lug 1 is first lifted out of the notch l4. The cap 4 cannot then be closed because the leaf spring 6, which is pressed fiat by the thickened-part 22, slides ineffectively in the groove 13. When the tube is practically completely retracted the lug I catches in the notch I 2, assisted by the spring 6 becoming curved again, so that the cap 4 is closed.

What I claim is:

1. A fountain pen holder comprising two telescopically slidable tubes, the inner tube being provided with an annular groove, a plurality of members associated with the outer tube and resiliently engageable in said groove when the tubes are retracted, a sleeve member secured to the inner end-of the outer tube, said sleeve member having recesses for receiving said resiliently engageable members and having an internal offset portion, said inner tube having an external oifset portion, said offset portions abutting each other when the tubes are retracted, whereby the tubes are resiliently fixed to each other when retracted.

2. A fountain pen holder as claimed in claim 1 wherein said resiliently engageable members are constituted by balls and further comprising a freely resilient ring disposed between the inner end oi the outer tube and said sleeve for embracing said balls.

LEOPOLD KUTTER.

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