CN2434146Y - Rule scale able to draw ellipse - Google Patents
Rule scale able to draw ellipse Download PDFInfo
- Publication number
- CN2434146Y CN2434146Y CN 99247827 CN99247827U CN2434146Y CN 2434146 Y CN2434146 Y CN 2434146Y CN 99247827 CN99247827 CN 99247827 CN 99247827 U CN99247827 U CN 99247827U CN 2434146 Y CN2434146 Y CN 2434146Y
- Authority
- CN
- China
- Prior art keywords
- ruler
- vernier
- rope
- draw
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a sector type drawing instrument capable of drawing ellipses, which is novel stationery integrally composed of a sector rope (2), a protractor (5) and a ruler (1). The utility model can be used for drawing geometric figures, and has the functions of drawing circles, ellipses, arcs and straight lines and measuring angles. A vernier (4) is arranged on the ruler (1), and the vernier and the sector rope (2) can be fixed by screw nails (3) at a certain scale of the ruler (1) for drawing the ellipses.
Description
The utility model relates to a kind of geometry mapping apparatus, belongs to the stationery field.
Geometry carries out construction with ruler and compasses at present, and instrument commonly used is compasses, ruler and protractor, because this three is not integral, the patent application of people from Jinan, Shandong Jiang Xuebo " a kind of construction with ruler and compasses instrument " has proposed compasses, ruler, protractor " Trinity " scheme.Though this scheme is feasible, can't be in order to draw ellipse.
The purpose of this utility model is will provide a kind of can draw oval construction with ruler and compasses instrument, and it not only possesses the function and the advantage of existing construction with ruler and compasses instrument, but also available it draw various ellipses.
The purpose of this utility model is achieved in that 1. mfg. moulding dies: please make a kind of chi mould of being made up of ruler and protractor in the mould factory.Make a kind of vernier mould simultaneously.2. casting: with injection molding machine shrink rule body and vernier.On chi body 0 scale, bore a rule rope hole, on vernier, bore a screw hole and a rule rope hole.3. wire rope handling: will advise in the rule rope hole that rope is through chi body and vernier, and vernier being fixed on the ruler with screw.When picture is oval,, can determine focal length, after both are definite, will advise rope with the vernier screw and be fixed on certain scale, support with nib and advising the satisfactory ellipse that to draw of restricting according to the ruler scale according to the definite length of restricting of the axial length of ellipse.Can draw ellipse is advantage of the present utility model.
Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.Fig. 1 is according to a kind of profile that can draw oval construction with ruler and compasses instrument that the utility model proposes.Describe this a kind of details and the working condition that can draw oval construction with ruler and compasses instrument in detail below in conjunction with Fig. 1.
The utility model comprises one by rule rope (2) and a vernier (4) are housed on ruler (1) and protractor (5) the casting chi body chi body together, and a hold-down screw (3) is arranged on the vernier (4).When picture circle or arc, measure suitable rule rope length, be fixed on 0 graduation mark with hold-down screw, prop up with nib and advise desirable circle or the arc of to draw of restricting together with vernier.But with chi body measuring angle, picture straight line.Draw when oval, according to focal length vernier is slided into certain scale earlier, long according to axial length again with ruler angle gauge block rope, will advise rope with hold-down screw again and vernier is fixed, supportting with nib then and advising the ellipse that can draw of restricting.
Claims (1)
1. can draw oval construction with ruler and compasses instrument for one kind, it is characterized in that on by ruler (1) and protractor (5) casting chi body together, rule rope (2) and vernier (4) being housed, have a circle to decide screw (3) on the vernier (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99247827 CN2434146Y (en) | 1999-11-16 | 1999-11-16 | Rule scale able to draw ellipse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99247827 CN2434146Y (en) | 1999-11-16 | 1999-11-16 | Rule scale able to draw ellipse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2434146Y true CN2434146Y (en) | 2001-06-13 |
Family
ID=34033170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99247827 Expired - Fee Related CN2434146Y (en) | 1999-11-16 | 1999-11-16 | Rule scale able to draw ellipse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2434146Y (en) |
-
1999
- 1999-11-16 CN CN 99247827 patent/CN2434146Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |