GB1134569A - Improvements in black boards - Google Patents
Improvements in black boardsInfo
- Publication number
- GB1134569A GB1134569A GB2836866A GB2836866A GB1134569A GB 1134569 A GB1134569 A GB 1134569A GB 2836866 A GB2836866 A GB 2836866A GB 2836866 A GB2836866 A GB 2836866A GB 1134569 A GB1134569 A GB 1134569A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frame
- board
- central panel
- wings
- horizontal edge
- 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
- B43L1/06—Blackboards rigid
Abstract
1,134,569. Blackboards. DURHAM COUNTY COUNCIL. 22 June, 1967 [24 June, 1966], No. 28368/66. Heading B6P. [Also in Divisions G2 and G5] A classroom board includes a central panel A with pivoting wings A<SP>1</SP> and A<SP>2</SP>. The central panel comprises a backing plate (a, Fig. 3) of plywood or hardboard with a white or light coloured surface, covered by a transparent sheet of glass or acrylics hinged to the upper horizontal edge thereof. The wings A<SP>1</SP> and A<SP>2</SP> have black non-reflecting chalk board surfaces on both sides. The central panel may be used as a repeatedly useable writing surface with chinagraph pencils. Maps, plans and ruled sheets may be inserted between the backing plate and the transparent cover sheet. The board is fixed to a frame (a<SP>3</SP>) which is pivoted at its lower horizontal edge to a beam (a<SP>4</SP>) secured to a wall. Normally the frame (a<SP>3</SP>) is inclined rearwardly (Fig. 3) but if the central panel is to be used as a projection screen, the frame may be inclined forwardly and retained in this position by pins a<SP>6</SP> at the upper horizontal edge of the frame, co-operating with a slotted bracket a<SP>7</SP> fixed to the wall. Alternatively the frame may be moved by a worm and worm wheel mechanism. Part of the weight of the board is supported by telescopic legs. C. The wings A<SP>1</SP> and A<SP>2</SP> are provided with chalk rails a<SP>8</SP>. The top of the board may be formed as a receptacle for instruments with a recess to give access to an adjusting screw on the drafting instrument B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2836866A GB1134569A (en) | 1966-06-24 | 1966-06-24 | Improvements in black boards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2836866A GB1134569A (en) | 1966-06-24 | 1966-06-24 | Improvements in black boards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1134569A true GB1134569A (en) | 1968-11-27 |
Family
ID=10274552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2836866A Expired GB1134569A (en) | 1966-06-24 | 1966-06-24 | Improvements in black boards |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1134569A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435335A (en) * | 2019-08-02 | 2019-11-12 | 广州科技贸易职业学院 | A kind of interest English teaching remittance explanation displaying teaching aid |
-
1966
- 1966-06-24 GB GB2836866A patent/GB1134569A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435335A (en) * | 2019-08-02 | 2019-11-12 | 广州科技贸易职业学院 | A kind of interest English teaching remittance explanation displaying teaching aid |
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