US1288675A - Process of making drawing-pens. - Google Patents

Description

F. 0. RACE.

PROCESS OF MAKING DRAWING PENS. APPLICATION FILED IAN-26.1918.

7 1,288,675. Patented Dec. 24, 1918.

use.

'stantially tint FRED 0. RAGE, OF NEWARK, NEW JERSEY.

PROCESS OF MAKING DRAWING-PENS.

Specification of Letters Patent.

rammed Dec. 2a, 1918.

Application filed January 26, 1918 Serial No. 213,990.

To all whom it may concern:

Be it known that I, FRED 0. RACE, a citizen of the United States, and a resident of Newark, county of Essex, and State of New Jersey, have invented certain new and useful lmprovements in Processes of Making Drawing-Pens, of which the following is aspecification.

My invention relates to an improved process for making drawing pens for draftsmens A superior article of the character referred to may be produced in accordance with my process at a'very great saving in expense. In order that a drawing pen may be capable of holding a considerable reserve supply of ink without danger of dropping, and be adjustable for making lines of considerable width without dropping or blotting, it is requisite that the. interior surfaces of theseparated nibs between which the ink is held shall be very smooth and highly polished, and this is very difficult if not impossible of attainment when, as is customarily the practice, the pen is constructed of a single piece of material, and the opening between the nibs is formed by cutting out the material between the nibs by a milling machine or similar device, since in such case the access to the interior surfaces is limited and difficult and the requisite degree of smoothness and polish, if attainable at all, can only be secured with the utmost difficulty and at con siderable expense.

According to the present invention the nibs of the pen are formed separately and are afterward secured together in such manner that a structure is obtained which is subas strong and rugged as if made from a single piece of metal. The nibs being constructed separately may be produced in a simple and effective manner, as by means of dies, and access is, of course, obtained to the interior surfaces of the nibs which may readily and cheaply be made entirely smooth and be given a high polish.

In the drawing forming part of this specification and wherein the same reference numerals designate the same parts throughout, I have illustrated a pen made in accordance with my improved process, indicating the steps of the process by which it is produced.

In the said drawing which is intended only for the purpose of making my invention clearly understood and not for limitation thereof, Figure 1 is a side view of a completed pen. Figs. 2 and 3 are side views of the pen nibs, the dies by which they are formed being illustrated in dotted lines. Figs. 4 and 5 are plan views of the pen nib parts with the dies also illustrated in dotted lines. Figs. 6 and 7 are end views of the nib parts. Fig. 8 is a view partly in dotted lines illustrating the preferred mode. of shaping the shank and shoulder of the pen. Fig. 9 is a similar view illustrating the mode of attaching the holding sleeve for securing the pen nibs together, and Fig. 10 is a side view of the 'pen without the handle but with the holding sleeve in place thereon and with the openings formed therein for the adjusting screw.

The two pen nibs are designated by refer ence numerals 10 and 11 and are preferably formed of steel, dies 12 and 13 being used to form the nib l0 and being provided with appropriate forming surfaces for this purpose, and dies 1a and 15 of appropriate form being used to make the nib 11. The nib 10 is formed with a substantially half cylindri cal lug l6 and the nib 11 with a similar sub stantially half cylindrical lug 17, the two when placed together forming a substantially cylindrical shank 18 as shown in Figs. 8 and 9. After the nibs are formed by dies, as stated, their inner surfaces 19 and 20, as well as their other surfaces, are of a high degree of smoothness and the interior surfaces 19 and 20 are preferably buffed in or der to give them a high polish before the parts are assembled together. If desired, these inner surfaces 19 and 20 may be ground after being die formed and before being buffed, but as a rule this is not necessary and it is not considered essential. The pen points may be also ground to a true fit, if desired. After the nibs 10 and 11 have been completed they are placed together in pairs, preferably in a clamp as illustrated at 21, Fig. 8, and the shank 18 and the shoulder 22 are trued up as by means of a hollow member 23 which simultaneously trues up the shank and forms the accurate shoulder 22, and while the nibs are still held together in the clamp 21, the holding sleeve 24 is forced thereon as by driving means 25, such as a hammer or press punch, the opening 26 in the sleeve 24 being of such dimension that the sleeve 2 f has a driving fit on the shank 18, and when driven completely in place thereon, as in Fig. 10, serves to hold the nibs 10 and 11 securely together with substantially as great rigidity as if the parts were all made of a single piece of metal. After the nibs 10 and 11 have been secured together bv the sleeve 2% and their permanent relation to one another established, the nibs are bored for the adjusting screw 30, a threaded opening 31 being made in the nib 10 and a preferably smooth somewhat larger opening in the nib 11, the nib 11 being preferably thinned as shown at 33 in order to give it a spring action so that the nibs may be adjusted relatively by the screw to provide the desired distance between the points of the nibs whereby the width of the line to be formed by the pen is regulated.

Suitable provision is made for attaching the handle 27 t0 the sleeve 24, and in the form shown the handle 27 is provided with a threaded shank 28 which is screwed Within the threaded opening 29 provided in the sleeve 24 to receive the same.

It will be seen that by the present invention a drawing pen may be constructed at very low cost and that access to every part thereof is readily had in the manufacture, and all parts may be made smooth and accurate and may be readily given a high degree of finish or polish.

I claim:

1. The process of making a drawing pen which comprises forming separate nibs therefor by means of dies, clamping the nibs together and forming a substantially cylindrical shank thereon made up in part of the material of each nib, and securing a sleeve upon said shank with a driving fit while the nibs are still clamped together.

2. The process of making a drawing pen which includes forming the nibs" therefor separately by means of dies, polishing the freely exposed interior portions of the nibs, clamping the nibs together in permanent relation and forming a substantially cylindrical shank, part on each nib, driving a sleeve on such shank while clamped, and boring and tapping the shanks for the adjustment screw after they have been secured together by means of the sleeve.

In testimony that I claim the foregoing, I hereto set my hand, this 23rd day of January, 1918.

0. RACE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. 0.

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