JPS6472899A - Rotary drawing board and protruding point rule - Google Patents
Rotary drawing board and protruding point ruleInfo
- Publication number
- JPS6472899A JPS6472899A JP22975387A JP22975387A JPS6472899A JP S6472899 A JPS6472899 A JP S6472899A JP 22975387 A JP22975387 A JP 22975387A JP 22975387 A JP22975387 A JP 22975387A JP S6472899 A JPS6472899 A JP S6472899A
- Authority
- JP
- Japan
- Prior art keywords
- drawing board
- horizontal ruler
- rotary
- vertical direction
- board
- 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
Abstract
PURPOSE: To quickly create an accurate drawing without soil by rotatably mounting a center type drawing board of a drafting board, and mounting a horizontal ruler with projections which can be displaced in the vertical direction to the drawing board. CONSTITUTION: A rotary drawing board B is fixed in a state that a drawing board A and a protractor graduation E of the rotary drawing board B are fitted, and the drawing paper is set in the center of the rotary disc B in this state. Then a horizontal ruler is displaced in a vertical direction and positioned. The rotary disc B is freely rotatable, so that the angle and gradient are determined corresponding to the horizontal ruler. When the same many lines are drawn, the drawing board B is fixed, the horizontal ruler is successively moved in parallel in the vertical direction by using a tangent screw of the horizontal ruler, whereby the continuous lines are drawn at specific intervals. On this occasion, as a rear face of the horizontal ruler comprises projections, a surface of the drawing paper can be prevented from soiled by the lead of a pencil in accompany with the displacement of the horizontal ruler.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22975387A JPS6472899A (en) | 1987-09-16 | 1987-09-16 | Rotary drawing board and protruding point rule |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22975387A JPS6472899A (en) | 1987-09-16 | 1987-09-16 | Rotary drawing board and protruding point rule |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6472899A true JPS6472899A (en) | 1989-03-17 |
Family
ID=16897144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22975387A Pending JPS6472899A (en) | 1987-09-16 | 1987-09-16 | Rotary drawing board and protruding point rule |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6472899A (en) |
-
1987
- 1987-09-16 JP JP22975387A patent/JPS6472899A/en active Pending
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