GB231615A - Improvements in or relating to mathematical instruments - Google Patents
Improvements in or relating to mathematical instrumentsInfo
- Publication number
- GB231615A GB231615A GB248224A GB248224A GB231615A GB 231615 A GB231615 A GB 231615A GB 248224 A GB248224 A GB 248224A GB 248224 A GB248224 A GB 248224A GB 231615 A GB231615 A GB 231615A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- members
- pin
- relating
- mathematical instruments
- 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
- B43L13/04—Guides for rulers
- B43L13/048—Guides for rulers with T-squares
Landscapes
- Preliminary Treatment Of Fibers (AREA)
- Scissors And Nippers (AREA)
- Catching Or Destruction (AREA)
Abstract
231,615. Edwards, L. E. Jan. 30, 1924. Pivoting adjustments.-The blade 2 of a teesquare has at one end a head 3 which may be fixed or adjustable and at the other end a parallel motion device comprising the members 4, 5 pivotally connected by links 6, 7 and urged apart by a spring 8, Fig. 3. The member 5 is connected to the blade 2 by a joint comprising a threaded pin 11 carried by the link and passing through a member 15, the gripping portion 16 of which is above the serrated surface 13 of a washer 12 interposed between the member 5 and the blade, the members 12, 15 being arranged to grip the blade at points considerably removed from the pin 11. The parts are clamped by a knob 17. To facilitate longitudinal adjustment of the members 4, 5, the blade is formed with a slot 18 through which the pin 11 passes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB248224A GB231615A (en) | 1924-01-30 | 1924-01-30 | Improvements in or relating to mathematical instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB248224A GB231615A (en) | 1924-01-30 | 1924-01-30 | Improvements in or relating to mathematical instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB231615A true GB231615A (en) | 1925-04-09 |
Family
ID=9740330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB248224A Expired GB231615A (en) | 1924-01-30 | 1924-01-30 | Improvements in or relating to mathematical instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB231615A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2415926A (en) * | 1945-05-05 | 1947-02-18 | James W Wilt | Ruling guide |
US2490315A (en) * | 1944-09-25 | 1949-12-06 | Engineering Mfg Co | Drafting apparatus |
US4245394A (en) * | 1979-02-02 | 1981-01-20 | Peterson Jerald G | Clamping device for straight edge |
-
1924
- 1924-01-30 GB GB248224A patent/GB231615A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2490315A (en) * | 1944-09-25 | 1949-12-06 | Engineering Mfg Co | Drafting apparatus |
US2415926A (en) * | 1945-05-05 | 1947-02-18 | James W Wilt | Ruling guide |
US4245394A (en) * | 1979-02-02 | 1981-01-20 | Peterson Jerald G | Clamping device for straight edge |
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