GB275445A - Improvements in drawing apparatus - Google Patents
Improvements in drawing apparatusInfo
- Publication number
- GB275445A GB275445A GB2571726A GB2571726A GB275445A GB 275445 A GB275445 A GB 275445A GB 2571726 A GB2571726 A GB 2571726A GB 2571726 A GB2571726 A GB 2571726A GB 275445 A GB275445 A GB 275445A
- Authority
- GB
- United Kingdom
- Prior art keywords
- square
- blade
- scale
- head
- setsquare
- 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
- B43L7/00—Straightedges
- B43L7/02—T-squares and other similar squares
Landscapes
- Drawing Aids And Blackboards (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
275,445. Solere, F. Oct. 15, 1926. No Patent granted (Sealing fee not paid). Squares,. protractors; rulers. - In a drafting instrument of the kind in which aT-square 2, which may have a pivoted blade, carries a slidable scale 3 and a slidable set-square &c. 4, the scale is graduated in opposite directions along its two edges so that measurements &c. can be made from either end. The scale is provided with a groove fitting over a rib 12 on the blade 2 and the set-square carries a plate 5 extending over the scale and having sighting-apertures 5' through which the two sets of graduations are read. Means are provided for maintaining the head of the T-square in engagement with the edge of the drawing-board, the device in the form shown comprising a rod 6 carried by the board and engaged by members 8 at the ends of a spring 7 secured to the head. Scales 18 are provided to enable the blade to be set at any desired angle in relation to the head. The setsquare 4 may be replaced by an adjustable protractor, Fig. 15, consisting of a graduated segment 23 and blade 21 pivoted to a slide 20 bearing index marks Z against which the graduations are read. The ruling edges of the T-square, setsquare &c. may be formed of transparent material such as celluloid.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2571726A GB275445A (en) | 1926-10-15 | 1926-10-15 | Improvements in drawing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2571726A GB275445A (en) | 1926-10-15 | 1926-10-15 | Improvements in drawing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB275445A true GB275445A (en) | 1927-08-11 |
Family
ID=10232130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2571726A Expired GB275445A (en) | 1926-10-15 | 1926-10-15 | Improvements in drawing apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB275445A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2236596A (en) * | 1988-12-13 | 1991-04-10 | Richard Begemann | Measuring instrument |
-
1926
- 1926-10-15 GB GB2571726A patent/GB275445A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2236596A (en) * | 1988-12-13 | 1991-04-10 | Richard Begemann | Measuring instrument |
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