US262528A - Eobeet g - Google Patents
Eobeet g Download PDFInfo
- Publication number
- US262528A US262528A US262528DA US262528A US 262528 A US262528 A US 262528A US 262528D A US262528D A US 262528DA US 262528 A US262528 A US 262528A
- Authority
- US
- United States
- Prior art keywords
- composition
- slates
- slate
- writing
- board
- 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
- 239000000203 mixture Substances 0.000 description 20
- 238000004519 manufacturing process Methods 0.000 description 16
- 239000010454 slate Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000899 Gutta-Percha Substances 0.000 description 4
- 229920000588 Gutta-percha Polymers 0.000 description 4
- 240000000342 Palaquium gutta Species 0.000 description 4
- 230000001070 adhesive Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000006011 modification reaction Methods 0.000 description 4
- 210000000988 Bone and Bones Anatomy 0.000 description 2
- 239000011111 cardboard Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- -1 equal parts Substances 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000002023 wood Substances 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
- This invention relates to an improvement in the manufacture of slates, as will be hereinafter fully set forth.
- Figure l is a face view of a slate embodying my improvement.
- Fig. 2 is a transverse section in the plane 2 2, Fig. 1; and Fig. 3, a modification.
- A represents the slate proper
- B the frame.
- the slate I In manufacturing the slate I first take a sheet, 0, of common straw or card board of suitable thickness to form a substantial body. Each side of this central body, 0, is then covered with the leavesD D,which arecomposed of smoothly-finished press-board.
- Thejoining surfaces are united by the use of any suitable adhesive composition, while the outer or writing surface of the leaves D D is covered with 0 a composition,hereinafter set forth, which renders the surface smooth and hard, and readily admits of the writing or figures being erased.
- the corner-jointsof theframe are strengthened and protected by means of the triangular caps 5 a, which are composed of some noiseless material, like leather.
- the slate-frame may be constructed of thick card-hoard in place of wood if suchachangeis found to be desirable, and when the corners are firmlyjoined together by any suitable adhesive composition the triangular corner caps or protectors may be dispensed with.
- This form of construction produces an article that is cheap, light, durable, and noiseless, possess- 5 ing all the advantages of the ordinary slate and none of the objectionable features.
- Fig. 3 of the drawings shows a tablet consisting of a number of leaves provided with covers and made up in book form. These leaves are finished with the composition in the same manner and by the same process employed in the manufacture of the slates.
- the process and composition used in the preparation of the writing-surface are as follows: 5 For black slates I first take one pint of silicate and one pint of bone-black to one and one-half pint of water, mixing the same thoroughly, and then running it through a grinding-mill. This mixture is then applied to theoutside sur- 6o face of the press-board by means of a soft brush. Each sheet of board should have two or three coats of this mixture, and should be sandpapered after each application. The writing-surface is finally finished by being varnished with a composition of gutta-percha and carbon, equal parts, to which are added three parts water and one part liquid silicate. This finishing composition should be first filtered before being used.
- the bone black should be omitted; or any colored slatc may be produced by simply using paper or press board of the desired color.
- An improved process in the manufacture of slates which consists of applying to the surface of press-board or other suitable mate- 8c rial acomposition of silicate, bone-black, and water in the proportions given, one or more coats being applied to form the writing-surface, which is sandpapered after the application of each coat, and finally finished by being varnished with a composition consisting of gutta-percha, carbon, and liquid silicate, equal parts, and water three parts, substantially as set forth.
Description
(No Model.)
k R. G. WINSLOW.
ART OF MANUFACTURING MATES.
No. 262,528 Patented Aug. 8, 18 82.
UNITED STATES PATENT OEEicE.
ROBERT G. WINSLOW, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO OLIVER W. BARRETT, OF SAME PLACE.
ART OF MANUFACTURING SLATES.
SPECIFICATION forming part of Letters Patent No. 262,528, dated August 8, 1882.
Application filed J l ne 17, 1882. (No model.)
To all 'wlwm 2t may concern:
Be it known that I, ROBERT Gr. \VINSLOW, of Chicago, in the county of Cook and State of Illinois, have invented certain new and use- 5 ful Improvements in the Art of Manufacturing Slates, of which the following is a description that will enable others to make and use thesame, reference being bad to the accompanying drawings, and to letters of reference marked thereon, forming a part of this specification.
This invention relates to an improvement in the manufacture of slates, as will be hereinafter fully set forth.
Figure l is a face view of a slate embodying my improvement. Fig. 2 is a transverse section in the plane 2 2, Fig. 1; and Fig. 3, a modification.
Referring to the drawings, A represents the slate proper, and B the frame.
In manufacturing the slate I first take a sheet, 0, of common straw or card board of suitable thickness to form a substantial body. Each side of this central body, 0, is then covered with the leavesD D,which arecomposed of smoothly-finished press-board. Thejoining surfaces are united by the use of any suitable adhesive composition, while the outer or writing surface of the leaves D D is covered with 0 a composition,hereinafter set forth, which renders the surface smooth and hard, and readily admits of the writing or figures being erased. The corner-jointsof theframe are strengthened and protected by means of the triangular caps 5 a, which are composed of some noiseless material, like leather.
The slate-frame may be constructed of thick card-hoard in place of wood if suchachangeis found to be desirable, and when the corners are firmlyjoined together by any suitable adhesive composition the triangular corner caps or protectors may be dispensed with. This form of construction produces an article that is cheap, light, durable, and noiseless, possess- 5 ing all the advantages of the ordinary slate and none of the objectionable features.
The modification illustrated in Fig. 3 of the drawings shows a tablet consisting of a number of leaves provided with covers and made up in book form. These leaves are finished with the composition in the same manner and by the same process employed in the manufacture of the slates.
The process and composition used in the preparation of the writing-surface are as follows: 5 For black slates I first take one pint of silicate and one pint of bone-black to one and one-half pint of water, mixing the same thoroughly, and then running it through a grinding-mill. This mixture is then applied to theoutside sur- 6o face of the press-board by means of a soft brush. Each sheet of board should have two or three coats of this mixture, and should be sandpapered after each application. The writing-surface is finally finished by being varnished with a composition of gutta-percha and carbon, equal parts, to which are added three parts water and one part liquid silicate. This finishing composition should be first filtered before being used.
In preparing whitewriting-surfaces the bone black should be omitted; or any colored slatc may be produced by simply using paper or press board of the desired color.
Having thus described my invention, what I 7 claim as new, and desire to secure by Letters Patent, is-
1. An improved process in the manufacture of slates, which consists of applying to the surface of press-board or other suitable mate- 8c rial acomposition of silicate, bone-black, and water in the proportions given, one or more coats being applied to form the writing-surface, which is sandpapered after the application of each coat, and finally finished by being varnished with a composition consisting of gutta-percha, carbon, and liquid silicate, equal parts, and water three parts, substantially as set forth.
2. As a new article of manufacture, a slate or writing-tablet prepared by the process herein described.
ROBERT G. WINSLOVV.
Witnesses:
L. M. FREEMAN, L. B. COUPLAND.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US262528A true US262528A (en) | 1882-08-08 |
Family
ID=2331804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US262528D Expired - Lifetime US262528A (en) | Eobeet g |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US262528A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452235A (en) * | 1946-03-02 | 1948-10-26 | Milprint Inc | Blackboard |
-
0
- US US262528D patent/US262528A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2452235A (en) * | 1946-03-02 | 1948-10-26 | Milprint Inc | Blackboard |
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