DE250173C - - Google Patents
Info
- Publication number
- DE250173C DE250173C DENDAT250173D DE250173DA DE250173C DE 250173 C DE250173 C DE 250173C DE NDAT250173 D DENDAT250173 D DE NDAT250173D DE 250173D A DE250173D A DE 250173DA DE 250173 C DE250173 C DE 250173C
- Authority
- DE
- Germany
- Prior art keywords
- rail
- curve
- tear
- rays
- tear bar
- 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.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/14—Devices for drawing in perspective
- B43L13/141—Two-dimensional devices
- B43L13/142—T-squares
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE250173C true DE250173C (enrdf_load_stackoverflow) |
Family
ID=508728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT250173D Active DE250173C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE250173C (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3464117A (en) * | 1968-06-11 | 1969-09-02 | James R Johnson | Perspective drafting device |
-
0
- DE DENDAT250173D patent/DE250173C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3464117A (en) * | 1968-06-11 | 1969-09-02 | James R Johnson | Perspective drafting device |
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