JPH01146996U - - Google Patents
Info
- Publication number
- JPH01146996U JPH01146996U JP4407788U JP4407788U JPH01146996U JP H01146996 U JPH01146996 U JP H01146996U JP 4407788 U JP4407788 U JP 4407788U JP 4407788 U JP4407788 U JP 4407788U JP H01146996 U JPH01146996 U JP H01146996U
- Authority
- JP
- Japan
- Prior art keywords
- plate member
- fan
- center plate
- center
- shaped plate
- 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
- 230000005415 magnetization Effects 0.000 claims 1
Landscapes
- Drawing Aids And Blackboards (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Description
第１図は本考案の一実施例を示す平面図である
。
１は中心板部材、２は角度目盛、３は扇形板部
材、４は線引き辺、５は基準線。
FIG. 1 is a plan view showing an embodiment of the present invention. 1 is a center plate member, 2 is an angle scale, 3 is a fan-shaped plate member, 4 is a drawn side, and 5 is a reference line.
Claims (1)
目盛を施した中心板部材と、 中心板部材の円弧に嵌り合うように中心部分を
切り欠いた扇形板部材とよりなり、 次の(イ)〜(ハ)の特徴を備えた分度器。 (イ) 中心板部材の外周にＮ極とＳ極を一定のピ
ツチで繰返し着磁する。 (ロ) 扇形板部材の内周に、Ｎ極とＳ極を中心板
部材の着磁ピツチと等しいピツチで少なくとも１
回着磁する。 (ハ) 扇形板部材の側辺を線引き辺とする。[Scope of Claim for Utility Model Registration] A center plate member that is circular or semicircular and has an angular scale from a reference line around its periphery, and a fan-shaped plate member that has its center portion cut out so as to fit into the arc of the center plate member. A protractor with the following features (a) to (c). (a) Repeatedly magnetize N and S poles at a constant pitch on the outer periphery of the center plate member. (b) At least one N pole and one S pole are arranged on the inner circumference of the fan-shaped plate member at a pitch equal to the magnetization pitch of the center plate member.
Rotate magnetize. (c) The side edges of the fan-shaped plate members are the drawn edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4407788U JPH01146996U (en) | 1988-03-31 | 1988-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4407788U JPH01146996U (en) | 1988-03-31 | 1988-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01146996U true JPH01146996U (en) | 1989-10-11 |
Family
ID=31270454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4407788U Pending JPH01146996U (en) | 1988-03-31 | 1988-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01146996U (en) |
-
1988
- 1988-03-31 JP JP4407788U patent/JPH01146996U/ja active Pending
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