CN87214466U - Multipurpose teaching ruler - Google Patents
Multipurpose teaching ruler Download PDFInfo
- Publication number
- CN87214466U CN87214466U CN 87214466 CN87214466U CN87214466U CN 87214466 U CN87214466 U CN 87214466U CN 87214466 CN87214466 CN 87214466 CN 87214466 U CN87214466 U CN 87214466U CN 87214466 U CN87214466 U CN 87214466U
- Authority
- CN
- China
- Prior art keywords
- ruler
- angle
- utility
- multipurpose teaching
- teaching ruler
- 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.)
- Withdrawn
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- Length-Measuring Instruments Using Mechanical Means (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a multipurpose teaching rule which can directly draw a general special angle and can be used as a protractor, and the utility model is composed of the combination of two set squares with the special angles and a graphometer.
Description
In mathematics, physics teaching, often use set square and graphometer protractor, one group totally three ruler.The utility model is combined three rulers, constitutes the multipurpose educational chi.Make this teaching chi and can save lot of materials.This chi carries more convenient, can satisfy the needs of general teaching.
This chi is on the basis of the right angle triangle that 30 °, 60 °, 90 ° three angles are arranged originally, and the interior angle of 60 ° of rulers is changed interior angle at 45.Ruler after the improvement with constituting the vertical bar shaped plate on the shortest limit of triangle, makes trapezoidal plate into.
When using this ruler, only need interior angle or the special angle that just can directly draw 30 °, 45 °, 60 °, 75 °, 90 ° and 105 °, exterior angle with it.
On the minor face of ruler, add the scale of upper angle in addition, constitute protractor.The center of protractor is on the hypotenuse of set square, and is whole the structure of ruler such as accompanying drawing.
Claims (3)
1, a kind of multipurpose educational chi is the right angle triangle that 30 °, 60 °, 90 ° three angles are arranged, and it is characterized in that: the interior angle that ruler is 60 ° changes 45 ° interior angle into, adds the scale of upper angle on the minor face of ruler.
2, utility model according to claim 1 is characterized in that an interior angle of ruler is 45 °.
3, utility model according to claim 1 is characterized in that the center of protractor is on the hypotenuse of ruler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87214466 CN87214466U (en) | 1987-10-22 | 1987-10-22 | Multipurpose teaching ruler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87214466 CN87214466U (en) | 1987-10-22 | 1987-10-22 | Multipurpose teaching ruler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87214466U true CN87214466U (en) | 1988-06-01 |
Family
ID=4828782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87214466 Withdrawn CN87214466U (en) | 1987-10-22 | 1987-10-22 | Multipurpose teaching ruler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87214466U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106114012A (en) * | 2016-07-29 | 2016-11-16 | 咸宁职业技术学院 | The set square for teaching of circle drawn by a kind of band slideway |
| CN109410710A (en) * | 2018-11-02 | 2019-03-01 | 珠海格力电器股份有限公司 | A kind of measurement method and device of period of single pendulum |
-
1987
- 1987-10-22 CN CN 87214466 patent/CN87214466U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106114012A (en) * | 2016-07-29 | 2016-11-16 | 咸宁职业技术学院 | The set square for teaching of circle drawn by a kind of band slideway |
| CN109410710A (en) * | 2018-11-02 | 2019-03-01 | 珠海格力电器股份有限公司 | A kind of measurement method and device of period of single pendulum |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |