CN2235903Y - Multi-purpose protractor - Google Patents
Multi-purpose protractor Download PDFInfo
- Publication number
- CN2235903Y CN2235903Y CN 95224937 CN95224937U CN2235903Y CN 2235903 Y CN2235903 Y CN 2235903Y CN 95224937 CN95224937 CN 95224937 CN 95224937 U CN95224937 U CN 95224937U CN 2235903 Y CN2235903 Y CN 2235903Y
- Authority
- CN
- China
- Prior art keywords
- protractor
- vernier
- ruler
- angle
- utility
- 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
Landscapes
- Drawing Aids And Blackboards (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The utility model discloses a multi-purpose protractor which collects a straight rule, a protractor and a vernier into integration. With convenient operation and artful design, the multi-purpose protractor can be used as the protractor for measuring angles, and can accurately draw various angles. The utility model can also be used as the straight rule, and has flexibility and practicality compared with the single protractor or a triangular rule.
Description
The utility model relates to a kind of student's drawing article, relates in particular to a kind of drawing instrument that is used to measure and draw angle.
At present, the protractor purposes on the market is single, is mainly used in the tolerance angle, when drawing various angle, need to determine earlier a starting point, measure the angle that needs with protractor again, draw a point, be connected with the point of ruler with starting point and tolerance, just can obtain needed angle, it is cumbersome to draw.
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of angle that both can be used to measure is provided, and can directly draw the new multi-purpose protractor of angle as required again.
The purpose of this utility model is achieved in that the protractor based on prior art, and the base is designed to a ruler, fixes a vernier in the center of ruler, when vernier is vertical with ruler, one side the central point of crossing protractor of vernier.When tolerance angle or drafting angle, rotate vernier as required, can measure out angle accurately or draw out angle to required angle.
The center of the described protractor of the utility model multipurpose protractor can have a half slot, can reduce the rubbing surface of vernier on protractor.
The utility model multipurpose protractor, collection ruler, protractor, vernier are one, are skillfully constructed, easy to use, both can measure angle as protractor, can draw out various angles exactly again, also can be used as ruler, have more flexibility and practicality than individual quantities hornwork or set square.
Reaching embodiment in conjunction with the accompanying drawings is further described the utility model:
Accompanying drawing 1, the utility model example structure schematic diagram;
As shown in drawings, protractor (2) base is a ruler (1), and vernier (3) is fixed at the middle part with ruler (1), can rotate mutually; When vernier (3) is vertical with ruler (1), vernier (3) one side the central point of crossing protractor (2); When vernier (3) was parallel with ruler (1), the measurement limit of vernier (3) overlapped with the inner side edge of ruler (1).The center of protractor (2) has a semi-circular groove (21).(be carved with the tolerance angle on 21, ruler is carved with yardstick on (1) to protractor.
When the utility model is used as the tolerance angle, the inboard of ruler (1) can be leaned against on the limit of tested figure, the summit of its measured angle is positioned at ruler (1) center, rotates vernier (3) and makes it measure limit (31) to another measured limit, can read the angle of tolerance on protractor (2) exactly.
The utility model is used as when drawing angle, can directly rotate vernier (3), and the inner side edge of measuring limit (31) and ruler (1) to vernier (3) is required angle ∠ A.At this moment, the outer side edges of the another side of vernier (3) and ruler (1) is angle ∠ B, because the inside and outside side of ruler (1) is parallel, and the measurement limit (31) of vernier (3) is parallel with another side, so ∠ A=∠ B draws ∠ B and can obtain required angle.Angle too hour also can directly be drawn ∠ A in the semi-circular groove (21) of protractor (2).
Claims (3)
1, a kind of multipurpose protractor is characterized in that: the base of protractor is a ruler, fixes a vernier in the center of ruler.
2, multipurpose protractor according to claim 1 is characterized in that: when described vernier was vertical with ruler, the central point of protractor was crossed on the measurement limit of vernier, and when vernier was parallel with ruler, the measurement limit of vernier overlapped with the inner side edge of ruler.
3, multipurpose protractor according to claim 1, it is characterized in that: the center of described protractor can have a half slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95224937 CN2235903Y (en) | 1995-10-12 | 1995-10-12 | Multi-purpose protractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95224937 CN2235903Y (en) | 1995-10-12 | 1995-10-12 | Multi-purpose protractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2235903Y true CN2235903Y (en) | 1996-09-25 |
Family
ID=33871540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95224937 Expired - Fee Related CN2235903Y (en) | 1995-10-12 | 1995-10-12 | Multi-purpose protractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2235903Y (en) |
-
1995
- 1995-10-12 CN CN 95224937 patent/CN2235903Y/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 | ||
| 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 |