DE1486926A1 - Adjustable curve ruler for circular arcs - Google Patents

Description

PATENT ADVOCATE
DiPL-iMC. K iUNK

8 Mündtäii ö

4 / V U86926 2 L ΟβΖ.

Dieter acfele

793. Uh i η <j e η / Danube

KechtstraAe 6

"Adjustable curve ruler for! Vreisbogen"

) ^L as described hereinafter linear curves to the notv.ejulif vic & i, in I'andcl under the Dczeichnunn; ".'isejibahn rulers" available, replace. Every desired arc of a circle is '' ure '': putting down its radius

lic l; rfindun ^ is characterized by a guide ruler provided with a scale for the lladicn with a guide groove in the form of a sirale whose tan ^ entcnv / inkol \ f rac :: the following i'a'icrimgsforr.iel can be defined:

⁺ 1.3 x

3 :: lo ° lo ¹⁴

and -hire] one from "[e ^ cnseiti ^ schici-baren to each other -", n leads en '■■ ic "sai: ien lanelles existing I.body, which is in a guide that intervenes in dos fi'-irun ^ slineal has, 'crcn Krünmunr; represents a V / cndc line,

909829/0129 BATH _{0R | G: NAL}

which is identical to the hat of the starting piece of the guide ruler.

According to the invention, the ruler also consists of one Spiral guide rail ruler, which expediently consists of three parts lengthways, around the guide rail Can be made to a manageable size by putting two files together as required. There is one in this rail interchangeable division let in, which corresponds to the set Show outside and inside radius to show the radii in the different Measuring systems and also in the individual scale ratios without the original calculation. In the drawing is an example of the object of the invention in plan view in FIG

Fi ?. 1 shown

Fi-j. 2 is a cross section

according to line H-TI of the Fi ;;. 1 on an enlarged scale. Fig. 3 is an explanatory diagram

the Xähcrunnsforeiel

In the drawing dos guide ruler is denoted by 1; there is an interchangeable scale 2. The ruler 1 has a guide groove "^ to which a flexible body 4 is assigned, which is transparent and consists of lamellas 5 and has a guide rail 6. The groove 3 has a spiral shape, the tangent angle can be defined according to the following formula:

3 x lo ³ lo ¹⁴

where L ⁼ arc length from the starting point of the spiral to the relevant point and

909829/0129 ORIGIMAL BATHROOM - 3 -

³ H86926 ^1/2

3 * "is the tangent l.'angle at the point in T degrees. The guide rail 6 has the curve of a turning line, which is identical to the curvature of the groove 3 of the starting piece of the guide line 1. The attachment 4 is thus composed of individual elastic, e.g. plastic slats 5, the following conditions meet nuts: They should have a constant through a suitable interlocking or through individual brackets Have a width of about 5onm. This flat approx. 5oram wide band must be easy to bend in length (400 - 500 mm) and be crystal clear, at least in the area of the reading line. The length of the P> and, as shown in FIG. 1, is symmetrical with the initial curvature of the spiral into two Parts cut through, the turning point is in the middle. Along this line of intersection it is attached to an elastic Strip, guide rail 6 welded on; this strip is matched to the guide rail by means of a suitable profile design connected and still equipped with a reading line 7. By moving this attachment 4 in the guide rail it now always bends into the desired circular curvature. A clamping device known per se prevents one unwanted adjustment. Pie two outer profiles are at the edge of the character with a scale of 8 (mm division) Mistake; it allows easy measurement of all circular arc lengths.

In the drawing, the body 4 is in two positions A and B illustrated, with A showing R «* <% and B showing a Curvature of »1 = 150 ./. 200 m shows.

90 9829/0129 ORIGINAL BATHROOM

Claims (1)

Cl J Adjustable curve ruler for creating circular arcs of any radii, characterized by a guide ruler (1) with a scale (2) for the radii and a guide groove (3) in the form of a spiral whose tangent angle J *% can be defined according to the following approximation formula: 7 * = 1.3 χ L. 3 χ lo ³ lo ¹⁴ and by one consisting of mutually displaceable flexible lamellae (5) which are joined to one another Body (4), which in itself is a 909829/0129 BATH ¹ - 5 - 1 / 2-3488 U86926 has ruler (1) engaging guide rail (6) whose curvature represents a kend line that is identical with the groove (3) of the starting piece of the guide ruler (Ό is. . 2. Adjustable curve ruler according to claim 1, characterized in that the ruler consists of several of each other is composed of detachable parts. 3. Adjustable curve ruler according to claim 1 + 2, characterized in that the scale division can be replaced by another one that has a different system of measurement or Has scale ratio. 4. Adjustable ". Curve ruler according to claims 1-3, characterized characterized in that the outer lamellae are given away with a "laßskala 8". 909829/0129 , b. ι L e θ r s e 11 e