US1587185A - Lettering pen - Google Patents

Description

June 1 1926.

H. 1. ROGERS LETTERING PEN Filed Jan. 15, 1924 W J 7 n V M v. m I 9 7 5 INVENTOR Jforace I Rogers 7e. vd ATTORNEYS l atented June 1, 1926.

v UNITED STATES- 1,587,185 PATENT ()FFKQE...

- HORACE I. ROGERS, OF DETROIT, MICHIGAN, ASSIGNOR TO KEUFFEL AND ESSER COM- PANY, OF HOBOKEN, NEW JERSEY, CORPORATION OF NEW JERSEY.

LETTERING min.

Application filed January 15, 1924. Serial No. 686,246.

My invention relates to lettering or marking pens and particularly to that type of pen described in Letters Patent of the United States No. 1,367,846, to lValter F. Barch, dated February 1, 1921.

The Bar-ch pen, while being remarkably eflicient and practical, has the very objectionable feature that the ink when applied to the ink reservoir not only fiows downwardly to the extremities or termini of the nibs but also flows rearwardly to and beyond the adjusting thumb screw. This flow of the ink in both directions is probably due to capillary attraction, occasioned by the closely adjacent walls of the slot between the nibs. The ink accordingly becomes clogged with.- in the threaded portions of the thumb screw, materially interfering with the adjustment and free action of the same, and having passed rearwardly beyond the thumb screw renders the pen difiicult to clean. It is accordingly an object of my invention to provide a pen of the above character which is so constructed that the ink will be prevented from reaching the adjusting thumb screw and also from passing therebeyond.

A further object is to accomplish the aforementioned ends without materially affecting the ink holding capacity of the reservoir or in any way interfering with the proper action of the adjusting thumb screw and the resultant variation of the Width of the marking line produced bythe pen, and with the foregoing and other objects in view, my invention resides in the novel pen hereinafter described and claimed and in such variations and modifications thereof as will be readily apparent to those skilled in the art to which my invention pertains, it being understood that changes may be made within the scope of what is claimed without departing from the spiritthereof.

The preferred embodiment of my invention is disclosed in the accompanying drawings, wherein F lgure 1 1s a view 1n perspective of my lmproved pen;

Figure 2 is a somewhat enlarged top plan view thereof; and

Figure 3 is a View in section taken on the line 33 of Figure 2.

Referring to the drawings, the pen is composed of a body portion 10 in which is provided the customary longitudinal slot 11 forming the two pen nibs 12 and 18. An

ink reservoir 14 is formed upon the upper sides of the nibs and is of sufficient size to contain a considerable quantity of ink. The reservoir is formed with a sloping bottom wall which gives maximum ink holding capacity at the lower or forward end thereof, with gradually decreasing ink capacity toward the rear end, where the bottom wall merges with the upper side ofthe nibs. A thumb screw 15 extends through the opening 16 in the nibs, one of the openings being threaded, and which thumb screw is located some little distance in advance of the rear extremity 17 of the slot 11, allowing for the ready adjustment of the spacing of the extreme ends 18 of the nibs.

The side walls of the slot 11 immediately in front of the thumb screw are provided with transversely extending channels or grooves 19, which extend uninterruptedly from top to bottom of the rib cross-section, and which grooves together define a transversely extending opening 20, the same being of sufficient size to prevent the ink from the reservoir 14 from flowing therebeyond. By the location of the opening 20, at the point in the reservoir shown, it will be seen that substantial filling of the reservoir with ink will not defeat the object of the invention nor permit the escape of ink by way of the enlarged opening. The opening 20 spaces the side walls of the slot sufficiently far enough apart so that capillary attraction is ineffective to advance the ink beyond this point. The opening 20 accordingly projects the thumb screw from corrosion by the ink or from becoming clogged with the same. The ink, being prevented from reaching the thumb screw, accordingly cannot flow therebeyond and thus the rear extremity 17 of the slot is always maintained in a clean condition. My improved pen may accordingly be very easily cleaned by opening the nibs slightly and inserting the edge of a piece of paper or similar article into the slot 11 and which paper may readily reach all parts of the slot which are accessible to the ink from the reservoir 14.

Having thus described and explained my invention, I claim and desire to secure by Letters Patent-- A pen of the character described comprising a body portion having a vertically disposed slot extending inwardly from the outer end thereof and defining pen nibs, an

ink holding reservoir With sloping bottom Wall formed in the upper side of said nibs to provide increasing capacity toward the nib end of the pen, a thumb screw passing 0 through said nibs intermediate the ends of said slot, the slot being formed at the rear end of the reservoir and in front of the thumb screw with an enlarged opening having continuous side Walls Which spaces the nibs apart a distance sufficient to prevent the ink in the reservoir from reaching the said screw.

Signed at Detroit in the county of Vayne and State of Michigan this ninth day of January A. D. 1924.

HORACE I. ROGERS.

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