GB751427A - Improvements in or relating to boards for educational purposes - Google Patents
Improvements in or relating to boards for educational purposesInfo
- Publication number
- GB751427A GB751427A GB1691954A GB1691954A GB751427A GB 751427 A GB751427 A GB 751427A GB 1691954 A GB1691954 A GB 1691954A GB 1691954 A GB1691954 A GB 1691954A GB 751427 A GB751427 A GB 751427A
- Authority
- GB
- United Kingdom
- Prior art keywords
- black
- series
- frame
- maps
- boards
- 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
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/04—Blackboards
- B43L1/08—Blackboards flexible
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
751,427. Blackboards, maps &c. WILSON & GARDEN, Ltd. June 9, 1954, No. 16919/54. Class 146(2) In a blackboard of the type comprising an endless band constituted by flexible sheets of black - board - surface or like material detachably connected in series and entrained over top and bottom rollers 3, 3<SP>1</SP> carried by a frame 4, the bottom roller 3<SP>1</SP> is slidably adjustable in vertical slots 7 to take up slackness in the band and is held in adiusted position by pins insertible through a selected one of a series of horizontal vertically spaced holes formed in each of the side uprights of the frame. In lieu of black-board surface material the endless band may carry maps, diagrams or the like.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1691954A GB751427A (en) | 1954-06-09 | 1954-06-09 | Improvements in or relating to boards for educational purposes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1691954A GB751427A (en) | 1954-06-09 | 1954-06-09 | Improvements in or relating to boards for educational purposes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB751427A true GB751427A (en) | 1956-06-27 |
Family
ID=10086042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1691954A Expired GB751427A (en) | 1954-06-09 | 1954-06-09 | Improvements in or relating to boards for educational purposes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB751427A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010083669A1 (en) * | 2009-01-23 | 2010-07-29 | Guan Quanchun | Rolling writing board of module-assembled type |
-
1954
- 1954-06-09 GB GB1691954A patent/GB751427A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010083669A1 (en) * | 2009-01-23 | 2010-07-29 | Guan Quanchun | Rolling writing board of module-assembled type |
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