US2491770A - Scribing instrument - Google Patents

Description

' W. A. ROSS Dec. 2U, 1949 S CRIBING INS TRUMENT Filed Aug. 24, 1946 WALL/AM A. 72055 INVENTOR.

Patented Dec. 20, 1949 SCRIBING INSTRUMENT William A. Ross, Portland, reg., assignor of onehalf to Paul F. Gronnert, Portland, Oreg.

Application August 24, 1946, Serial No. 692,757

1 Claim. 1

This invention relates to improvements in drafting instruments and more particularly (to the type used for scribing letters, numerals, symbols, and the like.

It is one of the principal objects of the invention to provide an instrument of this character which is of simple and compact form and which is accurate in its operation of scribing a wide range of sizes and styles Of letters, numerals and symbols. in conjunction with a template.

A further object is the provision of a device of this character which may be readily attached to. and successfully operated with, other well known types of scribers.

These and other objects will appear as my invention is more fully herein-after described in the following specification, illustrated in the accompanying drawing and finally pointed out in the appended claims.

In the drawing:

Figure 1 is a plan view of an extending arm.

Figure 2 is an edgewise view of Figure 1.

Figure 3 is a. plan view of the main body member of the invention.

Figure 4 is a top plan view of the invention in its completely assembled form.

Figure 5 is a side elevation of Figure 4.

Figure 6 is a fragmentary top plan view of one portion of a template in which letters, numerals, symbols, characters and the like are engraved.

Referrin now more particularly to the drawing.

Reference numeral l indicates the main body member of the invention in the form Of a plate I terminating at one of its ends in a screw-actuated grip 2 for holding a writing instrument 3. The opposite end of the body member is notched as at 4 for engagement as an accessory with a pin 5 carried by a frame 6 of a scriber now common in the art. When so desired the body member is fixedly secured to the frame by means of rivets or the like extending through apertures I and '8.

In Figure 4 the invention is shown as a separate and individual instrument adapted for use in conjunction with the template shown in Fig- -ure 6.

As shown in Figure 5 the apertures i and 8 are threaded to receive a pin 9 and the threaded shaft of a finger grip II], respectively. To the body member I adjusta bly attach an extending arm H by means of spaced and numbered apertures I2 equally spaced apart throughout its length. The extending arm is securely held in any adjusted position by placing any one of the selected apertures i2 over the pin 9 and advancing the 2 threaded shaft of the finger grip l0 into the threaded aperture 8 of the body member.

To one end of the extending arm I secure a tracing pin [3 adapted to be deposited in and to trace letters, numbers, symbols, and the like, as indicated at M and engraved in a template I5. To the opposite end of the extending arm I l I secure a pivot pin l6 adapted to travel lengthwise of a channel ll formed in the template in spaced relation to the letters, etc., as shown.

In operation, the pin [6 becomes a pivot point for the extending arm I I as it moves transversely, lengthwise, or in a. circular path in tracing the engraved letters or the like, in the template. Due to the adjustable attachment of the extending arm to the body member I am able to scribe a wide variety of sizes of letters, numerals, symbols, characters, and the like, ranging from two sizes larger than the template size when the extreme right hand position as shown in dotted lines in Figure 4 to six sizes smaller than template size when in an extreme left hand position as shown in broken lines.

Between the scriber grip 2 and the finger grip Hi, I attach a pin 18 whose upper end terminates in a cup 19 to receive the tip of the index: finger of the user for convenience in manipulating the instrument in the scribing operation.

While I have shown a particular form of embodiment of m invention, I am aware that many minor changes therein will readily suggest themselves to others skilled in the art without departing from the spirit and scope of the invention. Having thus described the invention; what I claim as new and desire to protect by Letters Patent is:

A scribing instrument comprising an elongated body member adapted to receive and hold a writing instrument at one Of its ends, spaced-apart internally threaded apertures formed through the body member in the direction of its length, an extending arm formed with a plurality of apertures spaced-apart throughout its length and adjustably mounted lengthwise of the body member by means of a finger grip having a threaded shaft adapted for selective insertion through one of said apertures in the extending arm and into threaded engagement with one of said apertures in the body member, a stabilizing pin carried by the bod member and adapted for insertion into another of said apertures in the extending arm, a tracing pin carried by one end of the extending arm and adapted to trace letters engraved in one portion of a template, a pivot pin carried by the opposite end of said extending arm and adapted for pivotal and sliding movement in a channel Number formed in the template in spaced relation to said 2,011,195 letters. 2,088,063 WILLIAM A. ROSS. 2,398,323 REFERENCES CITED The following references are of record in the gg f file of this patent: k

UNITED STATES PATENTS m i l Number Name Date 1,775,904 Kassebaum Sept. 16, 1930 Name Date Keufel Aug. 13, 1935 Kassebaum July 27, 1937 Olson Apr. 9, 1946 FOREIGN PATENTS Country Date Germany Apr. 22, 1922

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