US360327A - School-slate - Google Patents
School-slate Download PDFInfo
- Publication number
- US360327A US360327A US360327DA US360327A US 360327 A US360327 A US 360327A US 360327D A US360327D A US 360327DA US 360327 A US360327 A US 360327A
- Authority
- US
- United States
- Prior art keywords
- slate
- frame
- attaching
- school
- strip
- 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
- 239000010454 slate Substances 0.000 title description 28
- 239000000463 material Substances 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 235000000434 Melocanna baccifera Nutrition 0.000 description 2
- 241001497770 Melocanna baccifera Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 230000000881 depressing Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/76—Making of isolation regions between components
- H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
- H01L21/76224—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers using trench refilling with dielectric materials
- H01L21/76229—Concurrent filling of a plurality of trenches having a different trench shape or dimension, e.g. rectangular and V-shaped trenches, wide and narrow trenches, shallow and deep trenches
Definitions
- the object of my invention is to provide a slate with a novel frame of a noiseless material, which is at the same time impervious to water or moisture, so that the frame does not become dirty and sticky as with ordinary woolen muffling-strips.
- FIG. 1 represents a face View of a slate provided with a water-proof muftling-strip.
- Fig. 2 is a transverse section thereof in the plane 00 m, Fig. 1.
- Fig. 3 is a cross-section of the attaching frame.
- the letter A designates a piece of slate such as is ordinarily employed in the manufacture of slates
- B is the mufflingstrip
- O is the attaching-frame.
- the attaching-frame is made of thin sheet metal, which is bent so that it can be passed over the'edges of the slate, and it is provided in its length with numerous burrs or projections, c,which project inward toward the slate, and can be formed by depressing the material at selected points.
- the mufliing-strip consists of a long piece of a water-proof material, such as oil-cloth, rubber, and the like, and to secure the same to the edges of the slateits 1ongitudinal edges 1) b are introduced between the (No model.)
- attaching-frame and the slate and the attaching-frame is then pressed together upon the ac slate, whereby the muii'ling-strip is securely clamped all around its edges.
- the burrs con the attaching-frame penetrate the material of the inull'ling-strip and add greatly to the security of the fastening.
Description
(No Model.)
P. O. RITCHIE.
SCHOOL SLATE.
No. 360,327. Patented Mar. 29, 1887.
WITNES sE 4 C I, UVVENTOR 'E-ekem QR-Lmh'w- N. PETERS. Phowumu n han Walhillglom u. C.
UNITED STATES I ATENT FFICE.
PETER O. RITCHIE, OF FREMONT, NEV YORK.
SCHOOL-SLATE.
SPECIFICATION forming part of Letters Patent No. 360,327, dated March 29, 1887.
A pplicntion filed June 10, 1886. Serial No. 204,747.
T 0 all whom it may concern:
Be it known that I, PETER O. RITCHIE, a citizen of the United States, residing at Tremont, in the county of New York, in the State of New York, have invented new and useful Improvements in Slates, of which the following is a specification.
The object of my invention is to provide a slate with a novel frame of a noiseless material, which is at the same time impervious to water or moisture, so that the frame does not become dirty and sticky as with ordinary woolen muffling-strips.
The general construction of my slate'frame is more fully pointed out in the following specification and claim, and illustrated in the accompanying drawings, in which Figure 1 represents a face View of a slate provided with a water-proof muftling-strip. Fig. 2 is a transverse section thereof in the plane 00 m, Fig. 1. Fig. 3 is a cross-section of the attaching frame.
Similar lettersindicate corresponding parts.
In the drawings, the letter A designates a piece of slate such as is ordinarily employed in the manufacture of slates, B is the mufflingstrip, and O is the attaching-frame.
The attaching-frame is made of thin sheet metal, which is bent so that it can be passed over the'edges of the slate, and it is provided in its length with numerous burrs or projections, c,which project inward toward the slate, and can be formed by depressing the material at selected points. The mufliing-strip consists of a long piece of a water-proof material, such as oil-cloth, rubber, and the like, and to secure the same to the edges of the slateits 1ongitudinal edges 1) b are introduced between the (No model.)
attaching-frame and the slate, and the attaching-frame is then pressed together upon the ac slate, whereby the muii'ling-strip is securely clamped all around its edges. The burrs con the attaching-frame penetrate the material of the inull'ling-strip and add greatly to the security of the fastening.
Heretofore muli'ling-strips have been made of llannel or other noiseless material, all of which are more or less liable to absorb moisture-for instance, when the slate is washed with a sponge moistened with wateratter which dust or dirt readily adheres to the muffiing-strip, and it becomes very unsightly and also sticky. This I avoid by making the muftling-strip ofa water-proofmaterial,which does not absorb the water which is used in cleaning 5 the slate, and therefore always presents a neat, bright, and clean appearance, while such a inufl'lingstrip is as durable as the ordinary strip.
\Vhat I claim as new, and desire to secure by Letters Patent, is-
The combination, with a slate, of the attaching-frame extending around the edges of the slate and embracing the same, burrs or projections in said frame, and a muftlingstrip over the attaching frame, the edges of which lie between the slate and the attaching-frame and are penetrated by the burrs or projections of the latter, substantially as shown and described.
In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.
PETER G. RITCHIE. [I.. s.]
\Vitnesses:
A. FABER DU FAUR, J r., W. HAUFF.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US360327A true US360327A (en) | 1887-03-29 |
Family
ID=2429363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US360327D Expired - Lifetime US360327A (en) | School-slate |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US360327A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170144257A1 (en) * | 2015-11-25 | 2017-05-25 | Nippon Steel & Sumikin Welding Co., Ltd. | FLUX-CORED WIRE FOR Ar-CO2 MIXED GAS SHIELDED ARC WELDING |
-
0
- US US360327D patent/US360327A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170144257A1 (en) * | 2015-11-25 | 2017-05-25 | Nippon Steel & Sumikin Welding Co., Ltd. | FLUX-CORED WIRE FOR Ar-CO2 MIXED GAS SHIELDED ARC WELDING |
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