JPS61143890U - - Google Patents
Info
- Publication number
- JPS61143890U JPS61143890U JP2787585U JP2787585U JPS61143890U JP S61143890 U JPS61143890 U JP S61143890U JP 2787585 U JP2787585 U JP 2787585U JP 2787585 U JP2787585 U JP 2787585U JP S61143890 U JPS61143890 U JP S61143890U
- Authority
- JP
- Japan
- Prior art keywords
- reference line
- center point
- margin section
- protractor
- scales
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Length-Measuring Instruments Using Mechanical Means (AREA)
Description
第１図は本考案の分度器の実施例の外観平面図
、第２図は本考案の分度器を使用して傾斜した線
分を画く説明図、第３図は従来の分度器により角
度の位置を求めるときの説明図、第４図は第３図
にて求めた角度の線分を画く説明図である。
なお図面に記載の記号は下記のものを示す。０
……中心点、１……分度器、２……余白部、３…
…スリツト、４……基準線、５……尺度。
Fig. 1 is an external plan view of an embodiment of the protractor of the present invention, Fig. 2 is an explanatory diagram of drawing an inclined line segment using the protractor of the present invention, and Fig. 3 is an illustration of determining the position of an angle using a conventional protractor. FIG. 4 is an explanatory diagram showing the line segments of the angle determined in FIG. 3. The symbols shown in the drawings indicate the following. 0
...Center point, 1...Protractor, 2...Margin, 3...
...Slit, 4...Reference line, 5...Scale.
Claims (1)
より前記基準線の左半分に対し０°〜１８０°の
各角度をなす角度目盛が刻まれ、前記の側と反対
の側に直線目盛等が刻まれた余白部が設けられて
いる分度器において、前記余白部に一辺が前記基
準線と一致し筆記具の先端部を挿入できるスリツ
トが貫設されてなる分度器。 With respect to the reference line passing through the center point, angle scales are carved on one side to form angles of 0° to 180° from the center point to the left half of the reference line, and on the opposite side to the above side, linear scales, etc. What is claimed is: 1. A protractor that is provided with a margin section in which is engraved, the margin section being provided with a slit in which one side coincides with the reference line and into which the tip of a writing instrument can be inserted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2787585U JPS61143890U (en) | 1985-02-27 | 1985-02-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2787585U JPS61143890U (en) | 1985-02-27 | 1985-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61143890U true JPS61143890U (en) | 1986-09-05 |
Family
ID=30525233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2787585U Pending JPS61143890U (en) | 1985-02-27 | 1985-02-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61143890U (en) |
-
1985
- 1985-02-27 JP JP2787585U patent/JPS61143890U/ja active Pending
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