CN2423113Y - Ellipsograph - Google Patents
Ellipsograph Download PDFInfo
- Publication number
- CN2423113Y CN2423113Y CN 00220429 CN00220429U CN2423113Y CN 2423113 Y CN2423113 Y CN 2423113Y CN 00220429 CN00220429 CN 00220429 CN 00220429 U CN00220429 U CN 00220429U CN 2423113 Y CN2423113 Y CN 2423113Y
- Authority
- CN
- China
- Prior art keywords
- vernier
- utility
- model
- ruler
- ellipse
- 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
Images
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model relates to a drawing tool-a pair of elliptical compasses, which is composed of a straightedge, a flexible ruler, a vernier and a line collecting disc. The utility model is characterized in that two focal points F1 and F2 of an ellipse can be determined by the straightedge and the vernier. A constant PF 1+ PF 2 is determined by the flexible ruler. The utility model has the advantages of simpleness and practicality. The needed ellipse can be arbitrarily drawn, the blank of drawing the ellipse without a specific tool is filled, and the elliptical compasses are especially suited to be used for drawing for school students and drawing personnel.
Description
Up to now, when oval logo is drawn in mapping, very inconvenient because of there not being special drawing tool.
The purpose of this utility model provides a kind of instrument of special drafting oval logo.
The utility model is achieved in that
The utility model is made up of ruler, tape, vernier and take-up reel.It is characterized in that: an end of tape is installed in of ruler, and the other end is installed on the take-up reel through vernier, and take-up reel is installed in the other end of ruler.Vernier is installed on the ruler and can move freely.
Fig. 1 represents structural representation of the present utility model
Fig. 2 represents schematic top view of the present utility model
Be described further below in conjunction with accompanying drawing:
With reference to Fig. 1-Fig. 2
1 is ruler among the figure, and 2 is tape, and 3 is vernier, and 4 is take-up reel, and 5 is two pieces of locking pins on ruler and the vernier.
One end of tape 2 is installed in of ruler 1, and the other end is installed on the take-up reel 4 through vernier 3, and take-up reel 4 is installed in the other end of ruler 1, and vernier 3 is installed on the ruler 1 and can move freely.
When drawing oval logo, determine oval 2 focal point F 1, F2 with the locking pin on ruler and the vernier 5 earlier, determine constant P F1+PF2 with tape 2.Tighten the tape rotation with pen and draw out oval half (shown in Fig. 1 dotted line), transposing F1, F2 draw out second half of ellipse again, form complete ellipse.
The utility model has the advantages that: simple, practical, the required ellipse that can draw has arbitrarily been filled up and has been drawn ellipse The blank that does not have specific purpose tool. Be particularly suitable for using when school student and drawing personnel map.
Claims (1)
1. ellipsograph, be made up of ruler 1, tape 2, vernier 3 and take-up reel 4, it is characterized in that: an end of tape 2 is installed in of ruler 1, and the other end is installed on the take-up reel 4 through vernier 3, take-up reel 4 is installed in the other end of ruler 1, and vernier 3 is installed on the ruler 1 and can move freely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00220429 CN2423113Y (en) | 2000-05-25 | 2000-05-25 | Ellipsograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00220429 CN2423113Y (en) | 2000-05-25 | 2000-05-25 | Ellipsograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2423113Y true CN2423113Y (en) | 2001-03-14 |
Family
ID=33585472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00220429 Expired - Fee Related CN2423113Y (en) | 2000-05-25 | 2000-05-25 | Ellipsograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2423113Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070896A (en) * | 2014-06-19 | 2014-10-01 | 西京学院 | Ellipsograph |
-
2000
- 2000-05-25 CN CN 00220429 patent/CN2423113Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070896A (en) * | 2014-06-19 | 2014-10-01 | 西京学院 | Ellipsograph |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Nan Hao Document name: Notice of termination |
|
| 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 |