US250802A - Stylographic pen - Google Patents

Description

(No Model.)

W. E. GARD.

STYLOGRAPHIG PEN.

Patented 1300.13, 1881;

v No. 250,802.

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UNITED STATES PATENT OFFICE.

STYLOGRAPHIC PEN.

SPECIFICATION forming part of Letters Patent No. 250,802, dated December 13, 188i.

Application filed August 29, 1881. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM E. GARD, of

Baltimore, in the State of Maryland, have invented an Improved Stylographic Pen or Fountain-Pencil; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification Figure 1 being a longitudinal central section IQ of the pen, with a view of the style or pin in position for use; Fig.2, a corresponding section, showing the parts in position for carrying in the pocket; Fig. 3, a section of the upper part of the instrument, showing a modification of the construction; Fig. 4, a section of the lower end of the pen, the style not being in section, showing the parts enlarged beyond their actual size to exhibit the form thereof more clearly,

Like letters designate corresponding parts in all the figures.

My improved fountain-pencil is of extreme simplicity in construction, and yet is efficient in action and easily managed and keptin order.

A simple hollow or tubular holder, A, of proper length and diameter to conveniently hold in the hand, has a weighted style or pin, B, therein. These two parts have the following special features of construction: The hollow holder A, which may be of hard rubber,

glass, or other suitable non-corrosive material, has a hollow conical point, a, preferably of a hard as well as a non-corrosive material, so that it may wear and endure the longer, the fine capillary openingtherein being at the apex only, and immediately enlarging on the inside, substantially as shown. The style or pin B is also conical or correspondingly enlarged just above its lower pointed end, b, so as to fit down 4 in the hollow point of the holder and close the orifice thereof, as a valve, when it descends by its own gravity to its lowest position, while at the same time its point extends downwarda little beyond the point of the holder, as usual with such pens or pencils. By thus enlarging the inside of the holder-point a immediately at its capillary extremity air is admitted through this orifice to replace the ink drawn out in writing, and thus I obviate the requirement of an air-admitting orifice near the holder, to be opened or closed by the cap. The admission of the air is thus regulated by the flow of ink, and is never too free, nor is the flow of ink in consequence ever excessive hence the pen is easily controlled.

The cap 0 of the holder screws or otherwise fits air-tight into or over the upper end thereof. Its interior surface, 0, is concavely conical, its center being the apex of the cone; and into this conical cavity the upper conical or pointed end, d, of the style B fits and plays, the cavity in the cap being larger than the style, so that one cannot stick in the other, but is free to enter and separate from the same. This construction not only keeps the style in a central position, but enables me to use the cap both as a regulator of the movements of the style and to close it down and shut the orifice in the point of the holder when the pencil is not in use. To effect this it is only necessary to unscrew the cap alittle away from the upper end of the style, as indicated in Fig. 1, so as to allow the latter to have a slight play or movement up and down for using the pencil. Then, when the holder is to be closed for carrying, 75 the cap is screwed down against the upper end of the style, as indicated in Fig. 2, so as to' cause the lower conical end of the style to shut the lower orifice of the holder, and all is secure, with no danger of the escape of any ink. The extent of the play of the style in use is easily regulated by the cap, and since the admission of air and giving out of ink do not depend on the cap 0, that is never disturbed for that purpose.

In Fig. 3 I have shown a modification of the construction of the cap 0. Its inner part, c,

is an elastic plug, of india-rubber or equivalent elastic material, with preferably an airspace above. This construction gives a yielding pressure on the upper end of the style, so as to prevent injuring anything in screwing down the cap, and to insure the complete closing of the orifice at the'lower end of the holder at the same time. 95

The style or pin B is weighted sufficiently to give the requisite downward pressure to properly close the ink-outlet after each raising of the same in writing. I prefer to make the weight a near the upper end, as shown, but Ice this is not essential. The weight or enlargement should not be too great in diameter, so as to interfere with the filling of the holder with ink, which is poured into the top of the holder after removing the cap 0. The requisite weight may be given to the style by making it of sufficient uniform diameter along its whole length.

To protect the projecting point of the style B, when the pen is closed for carrying about, a shield-cap, D, is fitted over the lower end of the holder, as shown in Fig. 2, there being a portion, f, of the holder of proper size to receive it, without the shield being necessarily larger in diameter than the holder. When the pencil is in use this shield is placed on the upper end of the same, as shown in Fig. 1, there being an upward extension, g, on the cap 0, to receive the shield, which may simply slide on its receiving-extensions, or be screwed thereon.

What I claim as my invention, and desire to secure by Letters Patent, is-- 1. In a stylographie pen, the combination of the holder A, having its ink-controlling valve'seat close to the discharge-orifice, and the style B, having a valve-surface thereon close to the point, substantially as described, whereby not only is the ink discharged, but the ink replacing air admitted through the said orifice, substantially as herein specified.

2. The combination of the style B, havinga conical point at its upper end, and the cap 0,

having a conical cavity to receive the upper end of the style, substantially as and for the purpose herein specified.

The foregoing specification signed by me this 24th day of August, 1881.

WILLIAM E. GARD. Witnesses:

WALTER E. GARD, S. H. GARD.

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