US623461A - George wallace bryant and thomas charles townsend - Google Patents

Description

i No. 623,46L Patented Apr. I8; 1899.

G. w. BRYANT a T. c. TowNsEND.

vFUNTAIN PEN.

(Application med nec. 27,1997.)

(No Model.)

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GEORGE IVALLACE BRYANT AND THGMAS CHARLES TOVNSEND, OF GRAVESEND, ENGLAND.

FOUNTAIN-PEN.

SPECIFICATION forming` part of Letters Patent No. 623,461, dated April 18, 1899.

Application led December 27, 1897. Serial No. 663,747. (No model.)

To roZ whom, it may concern:

Be it known that we, GEORGE WALLACE BRYANT and THOMAS CHARLES TowNsEND, subjects of the Queen of Great Britain, and residents of Gravesend, in the county of Kent, England, have invented certain new and useful Improvements in Reservoir-Pens,of which the following is a specification.

This invention relates to improvements in reservoir-pens; and its object is to provide suoli a pen which may be used with either a pencil-pointed writing-nib or an ordinary writing-nib and with an arrangement whereby the means of filling the reservoir are contained in and form part of the reservoir, thereby making the reservoir-pen, with its filling device, self-contained.

In the annexed drawings, Figure l is a longitudinal section, on an enlarged scale, of the pen with its reservoir and lling device and with the writing end made to take any ordinary writing-nib. Fig. 2 is a cross-section thereof on the line ab. Fig. 3 is a cross-section on the line c d. Fig. el shows the writing end or nib-casing removed from the reservoir in side elevation. Fig. 5 shows the same nib-casing in plan view. Fig. Gis a crosssection on the line e f, Fig. al. Fig. 7 is a part longitudinal section of the reservoir -'pen, illustrating a pencil-pointed writing end. Fig. S illustrates the pencil-pointed nib removed from its casing in side elevation. Fig. 9 shows the pencil-pointed nib in plan view. Fig. 10 is a cross-section on the line g h, Fig. 8.

The ink-reservoir consists of two parts A and D, sliding telescopically one within the other, and thus forms a contraetible and expansible reservoir, the cubical contents of which may vary according as the inner part is more or less drawn outof the outer part. The outer part A is cylindrical, and near its front end it is provided with interior screwthreads I to engage similar threads on the exterior of the nib-casing, so that the nibcasing closes this end of the part A, with the exception of the passages for supplyof ink to the nib hereinafter described. The rear end of part A is provided with a bush E, in which the inner part D of the reservoir moves tight. The inner part D, preferably of glass, is closed at its rear end by a cap K, which may have screw-threads to engage screwthreads in the part A. The cap Kis cemented to the tube D.' The inner end of tube D also moves lightly on the inner surface of thev part A.

The nib-casing'B is of one of two kinds, according as it is fitted to receive an ordinary pen-nib or apencil-pointed nib, hereinafter described. The nib-easing B to take an ordinary nib is shown in Figs. l, 2, el, 5, and 6, and is as follows: A block which is mainly of cylindrical form, to fit accurately in the front end of the reservoir-tube A, has a screwthreaded part to engage the screw-threads near the front end of said tube A, as shown at P. Rearwardly hereof the block is reduced in diameter abruptly, as at Q, continued cylindrically for a short distance, and again enlarged abruptly, after which itis conically reduced, as at R, and this cone forms a stopper to the inner end of the tube D when the latter is pushed in sufiiciently far (by screwing in the cap K) to abut against the cone.

The forward end of the nib-casing is beveled off' obliquely as` far as the under side of the nib C, but above the nib it'projects somewhat farther forwardly. Immediately below this forward projection a slit M is formed in the nib-casing, which extends longitudinally rearward for a sufficient distance to take nearly the whole length of an ordinary pennib C-t-hat is to say, nearly to the screwthreaded part of the nib-casing. In crosssection this slit M is curved to conform with the curvature of the nib. Laterally of the said slit M and longitudinally of the nib-casing there are made in the latter two V-shaped grooves O O, Fig. G, extending from the front end of the nib-casing rearward to and crossing the screw-threads and opening in the reduced face Q of the nib-casing. The slit M opens laterally into these grooves O O at a distance above the bottom angle of each groove. The sides of the nib-casing from points level (vertically) with the rear end of slit M are cut away obliquely, these oblique cuts forming two fiat faces S, one along each with sufficient friction to make the joint airl side of the nib-casing extending to its front IOO end, as shown by Figs. 4, 5, and G. On reference to Fig. 2 it will be seen that the slit M, grooves O O, and faces S S are so formed that the nib C in the slit M touches the faces S S on each side and covers in the deeper part of each groove O, converting the latter into a channel or passage to which ink has access from the reservoir, since the grooves O extend distance as far as the faces O and the slit M extend.

Reverting now to Figs. 7 to l0, when a pencil-pointed nib is desired the construction is as follows: The nib-casing B has a screwthreaded end P to engage in screw-threads in the end of casing A. lts forward end is conically reduced up to the margin of the central cylindrical passage-way, which holds the nib C', but at diametrically opposite sides it has in its forward end a V-shaped recess, as shown at U. The nib C comprises the conical part R for the purpose before described. Forward ofthe base of the cone the diameter is reduced, and this reduced part is ltraversed diametrically by a hole H. The nib is then again reduced to form a shoulder, as at V, and forwardly of this shoulder the nib extends in a form which is principally cylindrical up to a distance corresponding to lthe forward end of the nib-Casin g, after which the nib is reduced conically to a suitablyrounded point J. From the hole H to the point J of the nib the latter'is slit longitudinally, as shown in Fig. l0, the slit G opening at the rear end into the hole H and having its edges on both sides beveled away, so that the slit tiares laterally,as shown in Fig.10.

Then it is desired to till the reservoir with ink, the writing end of the pen is placed in the ink far enough to submerge the openings of the slits in the 'nib or nib-casing. Then the cap K, having been unscrewed clear of the screw-threads in the part A, is drawn out, so as` to draw outward with it the tube D. The expansion thus given to the cubical contents of the reservoir causes a suction which will draw in an equivalent quantity of ink until equilibrium of pressure is produced inside and outside the reservoir. On now reversingthe pen, so that the nib is uppermost, the ink previously drawn in will run into the tube D, and on carefully pushing back the tube D into the tube A and so again contracting the reservoir to its former size the air above the ink therein will be expelled and the reservoir will remain charged with ink.

We claim as our invention- In a reservoir-pen the combination with a tube A, open and screw-threaded at each end, of a writing end adapted to close the end of tube A having on part'thereof exterior screwthreads to engage the threads in one end of tube A and having a part ot' reduced diameter forming an annular groove inward of said screw-threads and ending inward of said groove in a conically-reduced face together with a tube D open at its inner end and adapted to slide tightly within the tube A and to seat itself upon the conically-reduced face of the writing end when fully inserted in tube A, and a cap K integral with and closing the outer end of tubeD and having screw-threads for engaging corresponding threads at that end of tube A for adjusting the tube D with reference to the conically-reduced face of the Writing end; t-he whole substantially as set forth.

In witness whereof we have signed this specification in presence of two witnesses.

GEORGE WALLACE BRYANT. THOMAS CHARLES TOWNSEND. Vitnesses:

A. J. HADDAN, CHAs. ROCHE.

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