US1262971A - Lettering-triangle. - Google Patents

Description

, 0. A. OLSON.l

LEITERING TRIANGLE. APPLICATION FILED MAR- 29. |917- 'Patented Apr. 16,1918.

UNITED srArEs PATENT OFFICE.

' LETTERING-TRIANGLE.

Specification of Letters Patent. Patented Apr, 16, 1918.

Application led March- 29, 1917. Serial No. 158,444.

' To all whom it may concern.'

Be it known that I, OSCAR VA. OLsoN, a citizen of the UnitedStates, and resident of Ames, in the county of Story and State of A further object is to provide such a trif angle having`a 'rotary member, the triangle and rotary member being made of lsuch material and so arranged that the rotary member is normallylocked by the resiliency of' the 'parts against movement, the rotary member having portions adapted to be grasped by the fingers of the user, the partsvbeing so arranged that when irmly gripped by the linger of the user, the locked engagement of the parts will be released.

Still af further object is to provide such a triangle having a rotatable member provided with regularly spaced openings for makinglettering lines, said openings being arranged for makingdines at different dis' tances from each other.

Still a further object is to providesuch a triangle as that mentioned in the last paragraph having adjacent to said rotarymember certain indicating characters, which when the rotary memberis moved to a certain position` with relation thereto, indicate the 'relative 'spaces between the holes in the'r rotary .member for thereby indicating the height vof letter made in the use of lines formed by marking through said openings and sliding the triangle. s

Still a further object is to provide such a triangle having a rotary -member provided a with regularly spaced openings, and to provide figures adjacent to said rotarymember forming a protractor.

A still further object is to providev such a triangle having-figures and letters formlng a protractor arranged near one edge of the triangle for aiding in fdrawing slope lines for lettering.

Still a further object is to provide near one point of the triangle an opening with a plurality of circles arranged concentric therewith, and a line crossing said circle and said openmg and bisecting said angle of the triangle for making fillets or the like.

Vith these and other objects in View, my invention consists in the construction, ar-

rangement and combination of the various.

parts of the device, whereby the objects contemplated' are attained, as hereinafter more fully lset forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

` Figure 1 shows a top 0r plan view of a lettering triangle embodying my invention, and Fig. 2 shows a vertical, sectional view through the same taken on the line 2--2 of Fig. 1. v

In the accompanying drawings, I have used the character 10 to indicate generally a triangle preferably made of some transparent material such as Celluloid or Xylonite, and

having three straight edges .0, p and g.

Arranged adjacent to the straight edge Q are parallel concentric curved lines 11 and 12 lforming semi-circles centering' at 1". A plurality of lines 1,3 extend from the line 11 radially toward the center of the circles.

At the outer ends of the lines '13 are suitable numbers. The lines 13 are regularly spaced, and together with thelines 12'and 11 and the. members ust mentioned form a pro tractor.

On the` centralportion of the triangle is fa round opening 14. The wall ,of the triangle aroundjthe opening 14 is` provided -with a grooyewl. Mounted in the opening ing at its peripher an' annular, central iange 7c received in t e groove 15, and hav-v -ing on opposite sldes recesses, the walls of which are indicated by the letter y'.

14 is a transparent rotary member 16 hav- Between the two recesses in the oppositeNV side of the rotary member 16 are parallel slots e andl c1. -The'rotary member is made fof resilient, transparent material and isso arranged that the portions 17, forming points at the ends of the recesses in the rotary,\member, frictionally engage the vrWall of the opening 14 for locking the rotary member against movement. f

When originally made the pointsl? eX- tend outside of `.a true circle and they are pressed .inwardly in mounting the rotary member in the opening 14, after which they form a friction lock for normally preventing rotation of the rotary member.

.j When the fingers are inserted in `the recesses in the rotary member and pressed `toward. each other, it will be 'seen that the body of the rotary member, between the slots e and e1 and the recesses in said rotary member will yieldingly slide, so that the portions 17 will be drawn inwardly for thereby reducing their frictional engagement with the body of the triangle and thereby permitting the easy rotation of the vregular intervals at any desired distance apart.

The holes in the different rows are arranged at different distances apart. Take for instance the holes in the rows il. These holes are arranged to make lines for making letters, the lower portions of which are two-thirds the entireheight of the letters, and `the upper portions of which are one`l third the entire height of the letters. Thus the holes in the row l are arranged in the order of one hole, then two' holes closer together, then another single hole, then two holes closer together and so on.

Assume that the letter to be made is one-fourth inch in height, then the two close holes are arranged one-twelfth of an inch apart and each close hole is arranged twotwelfths 'of an inch from the next adjacent single hole. Thus if the triangle is placed on a piece of paper and the base is placedv against some fiXed guide object witha straight edge, then if the pencilA is inserted in the second circle from the toplan'd the triangle is slid-laterally, for makin a line,

' and the-pencil is placed in the third hole from the top and the triangle isslid laterally for making a second line, and the pencil is then placed in the fourth hole from the top and the triangle is slid laterally formaking a third line, the first and third lines Awill be one-fourth of an inch apart, and the first land second Alines will he one-twelfth of an inch apart, andthe second and third lines will be two-twelfths 1 is directly above the lower line already made.

The holes in the rows h and g are arranged atv different distances for making letters on other scales. I f

Assume that the holes in the row'z'l 'are arranged as mentioned, the distance from each hole to the second hole therefrom will be eight thirty-seconds of an inch. 1f it is desired to make letters on the same scale of one-third and two-thirds, but 'to make them of a different height above and below the middle guide line of each set of three of such lines, I have provided adjacent to the opening 14 a plurality of characters and lines c. The characters are the numbers 2, 3, 4, 5, 6, and 7. These represent the numerator, the unshown but understood denominator for each number being 32 and the number referring to fractions of inches.

When the middle row of holes L is in vso vertical position they will be in line with the line d, and the numeral 8 arranged below the center of the rotary member 16. The characters 2, 3, 4, 5, 6 and 7 and the lines adjacent thereto are so arranged that when the rowjof holes z, is turned to be in line with the numeral 7, then when the row of holes 'i1 is used for making lines, the lines will be properly spaced for making letters seven thirty-seconds of an inch in i height, and so on. y

Tt will be seen from 'the illustration'given that spaced lines for making letters of ,a great variety of heights may be made with the rotary member shown hereinprovided with the different rows of holes. Arranged near the lower corner of the triangle is an opening m around which are concentric cir.

cles Z. The opening m is in the line bisectin the angle of the triangle in which the ho e m is located'. The circle and opening m are used for locating the centers for drawing fillets.

Assume that it is desirable to show in the drawing a fillet extending from one to another of two lines arranged at right-angles to each other, the triangle is placed on the drawing until opposite sides of the same circle touch the two lines. 3A pencil can then be inserted through the hole m for marking on the drawing the center from which to f draw the llet.

It will be seen that a triangle of this kind can be put to a great variety of uses, and it is especially designed for use by students in the studyv of lettering. d

4Some changes may be made in the construction, and -it is my'intention .to vcover by the claims of 'my patent any modified forms of structure or use of mechanical equivalents, which may be reasonably ineluded within the scope of my claims.

I claim as my invention:

1. An instrument having straight edges, and having a circular opening, a member m unted for rotation in said openingsaid m mber being provided with a row of regularly. spaced holes, said instrumenthaving indicating marks adjacent to said opening,

for indicating the distances between the paths of travel of the various holes, 'and in dili'erent positions of the rotary member when the instrument is moved with a straight edge along a given straight line.

2. A measurin instrument having a straight edge, an al circular opening, a rotary member substantially circular in form mounted in said opening, vsaid Ainstrument and rotary member being provided with coacting guide portions, said rotary member being provided with opposite recesses in its periphery, and being made of resilient material, and being provided with slots spaced from said recesses, the parts being so arranged that the portions of the body of said Irotary member, adjacent to said recesses, normally, yieldingly, frictionally engage said instrument, and so that when the ngers are inserted through said recesses and pressed toward each other, said portions of the body will be drawn inwardly for reducing such rial, and being provided with slots spaced from said recesses, the parts being so arranged that the portions of the body of said rotary member, adjacent to said recesses, nor-V mally, yieldingly, frictionally engage said d instrument, and so that when the fingers are inserted through said recesses and pressed toward each other, said portions of the body will be drawn inwardlv forl reducing such frictional engagement, and additional means for yieldingly pressing said portions outwardly against the wall of said instrument around the opening therein.

4. An instrument having straight -edges and having a circular opening, a member l mounted for rotation in` said opening, said member being provided with, portions for yieldingly engaging the body of theinstrument, and with portions adapted to be grasped for drawing said first portions away from such engagement.

Des Moines, Iowa, March 9`197.

OSCARl A. oLsoN.

Images