GB170338A - Drawing instrument - Google Patents
Drawing instrumentInfo
- Publication number
- GB170338A GB170338A GB1669720A GB1669720A GB170338A GB 170338 A GB170338 A GB 170338A GB 1669720 A GB1669720 A GB 1669720A GB 1669720 A GB1669720 A GB 1669720A GB 170338 A GB170338 A GB 170338A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ruler
- square
- pencil
- scale
- groove
- 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
Links
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
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
170,338. Batic, A. June 21, 1920. Protractors ; squares. - In a drawing-instrument comprising a rotatable ruler b carried by a member c slidably mounted on a T-square. both the square and the ruler are provided with interchangable scales a, a<1> and with sliding pencil-holders k, which can be moved transversely to the edges of the square and ruler, and the member c is provided with a scale marked in degrees and with an additional scale d for facilitating the equal division of circles and arcs. The member c has a slot through which the scale a is visible, and a crossbar f in line with the centre of rotation of the ruler b. The pencil or copying- point t, Fig. 3, of the ruler is mounted in a sleeve l, which can be inserted in a groove in the slide of the pencil holder. The drawing-pen m is provided with two ledges o at right-angles, either of which can be inserted in the groove. The pencil-holder of the T-square is rotatably mounted on. the sliding frame k, as shown in Fig. 7.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1669720A GB170338A (en) | 1920-06-21 | 1920-06-21 | Drawing instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1669720A GB170338A (en) | 1920-06-21 | 1920-06-21 | Drawing instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
GB170338A true GB170338A (en) | 1921-10-21 |
Family
ID=10081986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1669720A Expired GB170338A (en) | 1920-06-21 | 1920-06-21 | Drawing instrument |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB170338A (en) |
-
1920
- 1920-06-21 GB GB1669720A patent/GB170338A/en not_active Expired
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