CN2157045Y - Circle drawing instrument - Google Patents
Circle drawing instrument Download PDFInfo
- Publication number
- CN2157045Y CN2157045Y CN 93204758 CN93204758U CN2157045Y CN 2157045 Y CN2157045 Y CN 2157045Y CN 93204758 CN93204758 CN 93204758 CN 93204758 U CN93204758 U CN 93204758U CN 2157045 Y CN2157045 Y CN 2157045Y
- Authority
- CN
- China
- Prior art keywords
- circle
- scale
- utility
- compasses
- model
- 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 belongs to a drawing instrument which combines a pair of compasses with a scale. The utility model is characterized in that the scale is provided with a circle-center hole necessary for drawing a circle or an arc and scale holes of any radii, and the utility model replaces the existing V-shaped compasses for drawing within limits. The compass scale of the utility model has the advantages of convenient carrying, favorable durability, handy and accurate drawing, simple manufacture and wide application scope.
Description
It is a kind of with compasses and scale combinations drawing instrument together---compasses chi that the utility model belongs to.
Existing " V " shape compasses must be held its both feet with both hands during use and measure to such an extent that the capable again picture of radius is justified or arc to ruler.Particularly the common compasses of student's use usually because of clamping screw becomes flexible or disconnected pin, make in a rush, are difficult to mapping.
The purpose of this utility model be design a kind of combined compasses, ruler (or set square etc.) in one, with convenient, accurately, " the compasses chi " of fast drawing.
The utility model compasses chi is a foundation with the necessary condition (center of circle and radius) of drawing circle or arc, is equipped with circle center hole and any radius hole on rule, so that draw circle or arc.
Structure of the present utility model, details are as follows in conjunction with the accompanying drawings:
Figure one (1) (five holes) is the hole that is made for the center of circle.Center of circle rod (3) (available pin replaces also can be special) is inserted and the corresponding circle center hole in radius scale hole (1), and the center of circle is promptly fixed.
(2) (hole of each scale) is the scale hole of selective radius.With the scale hole (2) that tip hard-tipped pen such as pencil, ball pen insert required radius, can make circle or arc.
(4) (four circles) be made for radius at 4 millimeters with interior ready-made standby circle.
Figure two is set square, protractor, compasses chi Trinity example.
The benefit of existing " V " shape compasses of novel bow compass chi is: (one) convenient (saved hold the compasses both feet measure to the ruler the process of radius, quicken mapping speed; Carry very convenient).(2) accurate (radius scale hole is fixed, and the operational capacity that need not have compasses now just can be handy).(3) produce simple (will have rule now and suitably improve, and add the hole and get final product).(4) practical and durable (applied widely; Be difficult in mapping, being out of order).
Claims (1)
- A kind of compasses chi that is used for picture circle or arc is characterized in that being equipped with circle center hole and any radius scale hole on rule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93204758 CN2157045Y (en) | 1993-02-24 | 1993-02-24 | Circle drawing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93204758 CN2157045Y (en) | 1993-02-24 | 1993-02-24 | Circle drawing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2157045Y true CN2157045Y (en) | 1994-02-23 |
Family
ID=33788220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93204758 Expired - Fee Related CN2157045Y (en) | 1993-02-24 | 1993-02-24 | Circle drawing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2157045Y (en) |
-
1993
- 1993-02-24 CN CN 93204758 patent/CN2157045Y/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 | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned | ||
| CF01 | Termination of patent right due to non-payment of annual fee |