GB260068A - Improvements in drawing instruments - Google Patents
Improvements in drawing instrumentsInfo
- Publication number
- GB260068A GB260068A GB2038925A GB2038925A GB260068A GB 260068 A GB260068 A GB 260068A GB 2038925 A GB2038925 A GB 2038925A GB 2038925 A GB2038925 A GB 2038925A GB 260068 A GB260068 A GB 260068A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rules
- slide
- slides
- instrument
- arm
- 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
- B43L11/00—Non-circular-curve-drawing instruments
- B43L11/02—Non-circular-curve-drawing instruments for drawing conic sections
- B43L11/04—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses
- B43L11/055—Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses with guides
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
260,068. Thompson, W., and Marsh, G. Aug. 13, 1925. Ellipsographs.-An instrument for drawing or cutting-out ellipses &c. comprises two rules 13, 14 at right-angles to each other, a rule. 17 which can slide on either of the rules 13, 14, and slides 1, 2 adapted to slide in any of the rules and carrying pivotal members through which passes an arm 19 carrying the marking or cutting means 20. Fig. 4 shows the slide 2, on which is pivoted a guide 3 within which is loosely mounted a block 4 provided with a screw 5 and lock-nut 6 and having an aperture 7 through which the arm 19 is passed. The slide 2 and block 3 are provided with pointers 10, 9 respectively, co-operating with scales on the rules and arm. Rollers 11 carried by the slide run on tracks 12 in the rules, which are also provided with grooves 15 to receive the slides. The slides can be clamped to the rules by screws 16, and' the rule 17 can also be clamped to either of the rules 13, 14 by a screw 18. By means of the instrument a portion of an ellipse or an arc of a circle can be drawn and combined with a portion of another ellipse or an arc of a circle. By fixing one of the slides 1, 2, the instrument can be used as a beam compass.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2038925A GB260068A (en) | 1925-08-13 | 1925-08-13 | Improvements in drawing instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2038925A GB260068A (en) | 1925-08-13 | 1925-08-13 | Improvements in drawing instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB260068A true GB260068A (en) | 1926-10-28 |
Family
ID=10145139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2038925A Expired GB260068A (en) | 1925-08-13 | 1925-08-13 | Improvements in drawing instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB260068A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2226530A (en) * | 1988-10-21 | 1990-07-04 | Peter John Fitch | Apparatus for describing an elliptical curve |
-
1925
- 1925-08-13 GB GB2038925A patent/GB260068A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2226530A (en) * | 1988-10-21 | 1990-07-04 | Peter John Fitch | Apparatus for describing an elliptical curve |
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