US773847A - Fountain-pen. - Google Patents

Description

No. 773,847. PATENTED NOV. 1, 1904.

J. BLAIR.

FOUNTAIN PEN.

APPLICATION FILED APB..16. 1904.

N0 MODEL.

J'T j" wamwm 9 1 @51 Patented November 1, 1904.

ATENT rricn.

JOHN BLAIR, OF BROOKLYN, NEW YORK.

FOUNTAIN-PEN.

SPECIFICATION forming part of Letters Patent No. 773,847, dated November 1, 1904.

Application filed April 16, 1904:.

T0 aZZ whom it may concern:

Be it known that I, JOHN BLAIR, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Fountain-Pens, of which the following is a specification.

In the writing-pens in which a supply of ink is carried in a reservoir in the barrel of the pen and intended to be fed down to the pen-point in the act of writing there is still more or less ditficulty in regulating the feed of the ink to the exact demand. There is also a liability to flooding and to the exudation of the ink through the joint connecting the pensection with the barrel. This invention is designed to remedy these defects. A great desideratum in pens of this class is a means for filling the ink-reservoir in the pen-barrel without employinga separate filler and without removing the pen-section. My present invention includes a very simple device for effecting this object.

The accompanying drawings fully illustrate the invention, its various features being referred to by letters, similar letters denoting corresponding parts in the several views.

Figure 1 is a side view of the pen, partly in section and with the cap on the rear end. Fig. 2 is an enlarged plan of a cross-section of the nozzle or pen-section on line at w of Fig. 1. Fig. 3 is an enlarged plan of a cross-section on lineg y of Fig. 1, and Figiis an enlarged cross-section on line 2 2 of Fig. 1.

The letter A designates the barrel of the pen, which incloses the reservoir holding the supply of ink, and a is the removable threaded plug at the rear end of the barrel.

B indicates the pen-section of a fountainpen or, as shown in the drawings, the pointsection of a stylographic pen. It hasathreaded end 6 to engage the inner threaded end of the barrel A. This point-section is provided with an exterior annular recess 6 at the base of the conical point 6 and with a recess t between its middle part and its rear threaded end 6. An air connection 6" is made across these threads to connect the recess 5 with the reservoir in the barrel.

One or more air-ducts b are made length- Serial No. 203,452. (No model.)

wise from the recess 6 through the pen-see tion to the recess 6 A continuous air connection is thus established between the exterior recess 5 and the ink-reservoir by which a uniform air-pressure is maintained and flooding and leakage are prevented.

6 is the ink-duct through the point-section, in which the feed-bar b is located.

On thethreaded rear end of the barrel A is the threaded plug a already mentioned. The threads and part of the stem of this plug are cut off at one or more places to form an airpassage (0 when the plug is partly removed.

O is a cap having a small vent-hole c, preferably through its otherwise closed end. This cap is employed to cover and protect the nib of the pen when the pen is not in use and is also made to fit evenly and snugly over the rear end of the barrel, covering, of course, the plug a.

In order to fill the ink-reservoir, the plug (6 is unscrewed about a half-turn or just sufficient to allow the passage of air through the channel a. The cap O is then put on and pressed down its full length. The nib or point of the pen is then inserted in the ink, when by covering the hole 0 with the finger and slowly drawing the cap off the ink will be drawnup by suction into the ink-reservoir. The plug is then screwed down tightly and the operation of filling the pen is completed.

In order to prevent a failure of the tractive force by reason of imperfect joining of the inner surface of the cap with the barrel, either by the stretching of the cap or defective construction, I form a groove D around the body A near its rear end, and insert in said groove a collar or packing (Z, oflinen,wax ,or other suitable substance, which will insure an air-tight connection between the cap and the barrel. If necessary, there may be two or more of these collars provided.

Havingnow described the invention and the manner of using it, what I claim, and desire to secure, is-

I. In a fountain-pen a point-section having a body portion and an interior threaded portion provided with a longitudinal air-channel, said interior portion having a recess between said body portion and said threaded portion I00 10 section and air-ducts connecting said exterior recess with said internal annular recess as herein described.

In testlmony whereof I have signed my name to this specification in the presence of two subscribing W tnesses.

JOHN BLAIR.

l/Vitnesses:

MAY HoLLINesHEAD, RICHARD F. OLPHERTS.

Images