US207111A - Improvement in blackboards - Google Patents
Improvement in blackboards Download PDFInfo
- Publication number
- US207111A US207111A US207111DA US207111A US 207111 A US207111 A US 207111A US 207111D A US207111D A US 207111DA US 207111 A US207111 A US 207111A
- Authority
- US
- United States
- Prior art keywords
- blackboards
- shall
- blackboard
- improvement
- durant
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 description 8
- 239000002023 wood Substances 0.000 description 6
- 239000003973 paint Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 241001325354 Lamiinae Species 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000010454 slate Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Images
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
- B43L1/10—Writing surfaces thereof
Definitions
- N'PETERS PHOTO-LITHOGRAPHER. WASHINGTON, D. C.
- This invention relates to a material intended to be sold in the market for application and use for blackboard purposes; the same consist ing of thin layers or laminae of wood cemented together, and provided with a coating or surfacing of paint or fine silicious matter adapted to receive chalk-marks.
- blackboard The principal requirements of a blackboard are, that it shall be unaffected by moisture; that it shall not under any circumstances shrink, swell, or warp; that it shall not be liable to check or crack under the continual exposure to the heat of the room; that it shall be light and easy to handle; that it shall occupy but little space; that it shall be adapted for application in a simple and permanent manner to the walls of the building, and that it shall be perfectly stiff and rigid under all circumstances.
- my board but not by any other hitherto produced. Beinglight, strong,
- the drawing represents a perspective View of a sheet of my material.
- A represents the sheet composed of the wood layers a b c, the number of which may be increased to any desired extent.
- the layers are arranged with their grain running in difl'erent directions, and are cemented or glued firmly together, intermediate layers of fibrous material being added, if desired, to give the blackboard greater strength.
- the front layer or, if desired, the others also, are treated with oil, varnish, or any other suitable material to render them impervious to moisture, and the front or front and back surfaces are treated with slate paint, or any of the various well-known silicious or slating solutions used for blackboards.
- a blackboard consisting of two or more thin layers of wood united crosswise of the grain, cemented together, rendered impervious to water, and coated with a silicate or other slating solution, substantially as and for the purpose described.
Landscapes
- Drawing Aids And Blackboards (AREA)
Description
E. G. DURANT. Blackboard.
N0.207 ,11'l. f Paten't edAug.2 0,1878.'
N'PETERS. PHOTO-LITHOGRAPHER. WASHINGTON, D. C.
UNITED STATES PATENT OFFICE.
EDWARD Gr. DURANT, OF RAOINE, WISCONSIN.
IMPROVEMENT IN BLACKBOARDS.
Specification forming part of Letters Patent No. 207,111, dated August 20, 1878; application filed January 3, 1878.
To all whom it may concern:
Be it known that I, EDWARD G. DURANT, of Racine, in the county of Racine and State of Wisconsin, have invented certain Improvemen ts in Blackboards, of which the following is a specification:
This invention relates to a material intended to be sold in the market for application and use for blackboard purposes; the same consist ing of thin layers or laminae of wood cemented together, and provided with a coating or surfacing of paint or fine silicious matter adapted to receive chalk-marks.
Many attempts have hitherto been made to produce a blackboard material which would be free from objection, and which would be suitable to put upon the market as an article of merchandise to be applied by the different consumers to the various uses and places required, and with this end in View different articles have been employed, among others paper and cloth properly surfaced; but, owing to various objections developed by use, they have all failed to meet the demands of the case.
The principal requirements of a blackboard are, that it shall be unaffected by moisture; that it shall not under any circumstances shrink, swell, or warp; that it shall not be liable to check or crack under the continual exposure to the heat of the room; that it shall be light and easy to handle; that it shall occupy but little space; that it shall be adapted for application in a simple and permanent manner to the walls of the building, and that it shall be perfectly stiff and rigid under all circumstances. Each and all of these requirements are answered by my board, but not by any other hitherto produced. Beinglight, strong,
and stiff, easy to handle, extremely cheap to construct and transport, my board will be found superior to all others, and to supply a The drawing represents a perspective View of a sheet of my material.
A represents the sheet composed of the wood layers a b c, the number of which may be increased to any desired extent. The layers are arranged with their grain running in difl'erent directions, and are cemented or glued firmly together, intermediate layers of fibrous material being added, if desired, to give the blackboard greater strength.
The front layer, or, if desired, the others also, are treated with oil, varnish, or any other suitable material to render them impervious to moisture, and the front or front and back surfaces are treated with slate paint, or any of the various well-known silicious or slating solutions used for blackboards.
Having thus described my invention, what I claim is A blackboard consisting of two or more thin layers of wood united crosswise of the grain, cemented together, rendered impervious to water, and coated with a silicate or other slating solution, substantially as and for the purpose described.
EDWARD G. DURANT.
Witnesses L. S. PORTER, FINLEY 1-1. McADoRR.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US207111A true US207111A (en) | 1878-08-20 |
Family
ID=2276515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US207111D Expired - Lifetime US207111A (en) | Improvement in blackboards |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US207111A (en) |
-
0
- US US207111D patent/US207111A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US207111A (en) | Improvement in blackboards | |
| CN109571659A (en) | A kind of environmental protection furniture material | |
| US204803A (en) | Improvement in stencils | |
| US796545A (en) | Composite board. | |
| US154581A (en) | Improvement in picture frames and mats | |
| US178949A (en) | Improvement in rattan veneers | |
| US169528A (en) | Improvement in materials for chair-seats | |
| US196531A (en) | Improvement in lining and packing paper | |
| US308312A (en) | gardner | |
| US358058A (en) | Chaeles f | |
| US269816A (en) | Manufacture of paper-board | |
| US301977A (en) | Measure | |
| JP7268778B2 (en) | Decorative sheet and board | |
| US675146A (en) | Composite board for finishing surfaces. | |
| US364416A (en) | Ornamental veneer | |
| US597953A (en) | Combined picture and frame | |
| JP3236744U (en) | Packaging material | |
| US299751A (en) | de planque | |
| US279875A (en) | Case or cabinet for sewing-machines | |
| US253864A (en) | Ohaeles b | |
| US184467A (en) | Improvement in book-binders cloth | |
| US269818A (en) | Manufacture of doors from paper | |
| US985490A (en) | Combination stair and hall carpet. | |
| US294838A (en) | Panel | |
| US1026868A (en) | Sign character. |