GB179059A - Improvements in or relating to instruments for drawing parallel and radial lines - Google Patents
Improvements in or relating to instruments for drawing parallel and radial linesInfo
- Publication number
- GB179059A GB179059A GB1029221A GB1029221A GB179059A GB 179059 A GB179059 A GB 179059A GB 1029221 A GB1029221 A GB 1029221A GB 1029221 A GB1029221 A GB 1029221A GB 179059 A GB179059 A GB 179059A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rollers
- ruler
- roller
- rulers
- needles
- 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
- B43L7/04—Straightedges with rollers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
179,059. Harter, G. April 7, 1920. Rulers; centrolineads.- Consists of a parallel or radial ruler comprising a straight-edge or body 2 provided with bearings for a spindle on which are mounted rollers 1, the rollers being provided with peripheral needlelike points to grip the paper, as described in Specification 164,065. As shown in Figs. 5 and 7, each roller is composed of rings 12, 13 filled in with cement &c. 14 in which the needles 11 are embedded. One or both of the rings are made cylindrical to bear on the paper, or a separate bearing-roller independent of the wheel may be mounted in close proximity to it. One or more circles of needles may be provided on each wheel. Fig. 8 shows a ruler for drawing radial lines, the rollers 1, 1<a> being mounted on separate spindles which are connected by gearing 22 - - - - 28. the gear ratio being variable by moving the idler 27. The roller 1<a> is splined on its spindle 21 so as to be axially adjustable thereon. This device may be adapted for describing circular arcs by the attachment of a pencil point or pen. Rollers as described may be used in rulers having two sets of rollers at an angle to each other and with those having means for indicating the displacement and/or locking means for preventing displacement. A straight edge may be adjustably secured to the body of the ruler.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1029221A GB179059A (en) | 1921-04-07 | 1921-04-07 | Improvements in or relating to instruments for drawing parallel and radial lines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1029221A GB179059A (en) | 1921-04-07 | 1921-04-07 | Improvements in or relating to instruments for drawing parallel and radial lines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB179059A true GB179059A (en) | 1922-05-04 |
Family
ID=9965171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1029221A Expired GB179059A (en) | 1921-04-07 | 1921-04-07 | Improvements in or relating to instruments for drawing parallel and radial lines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB179059A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2810197A (en) * | 1954-07-01 | 1957-10-22 | Robert C Sherry | Drafting instruments |
US4823475A (en) * | 1988-03-21 | 1989-04-25 | Hoegh Poul E | Drafting device |
US4914824A (en) * | 1989-05-04 | 1990-04-10 | Lee Otis M | Parallel rule |
USRE33654E (en) * | 1988-03-21 | 1991-08-06 | Drafting device |
-
1921
- 1921-04-07 GB GB1029221A patent/GB179059A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2810197A (en) * | 1954-07-01 | 1957-10-22 | Robert C Sherry | Drafting instruments |
US4823475A (en) * | 1988-03-21 | 1989-04-25 | Hoegh Poul E | Drafting device |
WO1989009139A1 (en) * | 1988-03-21 | 1989-10-05 | Hoegh Poul E | Drafting device |
USRE33654E (en) * | 1988-03-21 | 1991-08-06 | Drafting device | |
GB2245979A (en) * | 1988-03-21 | 1992-01-15 | Poul E Hoegh | Drafting device |
GB2245979B (en) * | 1988-03-21 | 1992-12-02 | Poul E Hoegh | Drafting device |
US4914824A (en) * | 1989-05-04 | 1990-04-10 | Lee Otis M | Parallel rule |
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