US213028A - Improvement in slate-frames - Google Patents
Improvement in slate-frames Download PDFInfo
- Publication number
- US213028A US213028A US213028DA US213028A US 213028 A US213028 A US 213028A US 213028D A US213028D A US 213028DA US 213028 A US213028 A US 213028A
- Authority
- US
- United States
- Prior art keywords
- frame
- slate
- edges
- cloth
- improvement
- 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
- 239000004744 fabric Substances 0.000 description 20
- 239000000463 material Substances 0.000 description 18
- 210000001747 Pupil Anatomy 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000010454 slate 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
- lt is customary to provide the edges of slateframes with cloth or similar material to render them noiseless; also, to provide the frame with a pencil-holder.
- My invention consists in providing the frame of the slate with suitable grooves to receive the edges of the cloth, or other similar material, and protect them from displacement, as hereinafter more fully set forth.
- A represents a slate-frame.
- b is a strip or" cloth or similar suitable material, the edges of which are inserted into grooves c, as shown in Fig. 3. As shown in this figure, these grooves are out at an angle, and the ends of the cloth, when inserted in such grooves, are completely protected by the wood, so'that such edges cannot be displaced by ordinary use; and the pupil cannot, without much diiculty, loosen the edge of the cloth at any point.
- the cloth can be held in place in any suitable manner. Glue or a suitable cement may be used.
- gures d is a narrow strip of cloth upon the outer edge of the frame, the edges ofthe cloth being let into grooves in the frame, and e c are strips upon the sides of the frame, the edges of the cloth being also let into the frame.
- the noiseless material is not placed upon the ends of the frame, but the ends might be provided with such material.
- the inneredge of the frame is provided with a measure stamped on the frame, which has proved a desirable feature in use.
- I use the common measure on one side, and the decimal form on the other side.
- a slate-frame provided with a continuous y groove or recess, in combination with a noise less material, the edges of said material being secured in the groove, substantially as and for the purpose set forth.
Description
'H.L. ANDREWS. Slate-Frame.
No. 213,028 Patentedwlar. 11,1879.
figa
'41".45 Ma/780%? v UNITED STATES PATENT EETcE.
HERBERT L. ANDREWS, OF CHICAGO, ILLINOIS.
IMPROVEMENT IN SLATE-FRAMES.
Specification forming part of Letters Patent N0. 213,025, dated March 11, 1879; application led April 9, 1878.
To all whom it may concern:
Be it known that I, HERBERT L. ANDREWS, ofChicago, Cook county, State ofIllinois, have invented a new and useful Improvement in Slates, of which the following is a full description, reference being had to the accompanying drawings, in which Figure l is a plan; Fig. 2, an end elevation; Figs. 3 and 4, enlarged details. Figs. 5, 6, and 'Z show a modilication oi' the method of application of noiseless material.
lt is customary to provide the edges of slateframes with cloth or similar material to render them noiseless; also, to provide the frame with a pencil-holder.
Heretot'ore the edges of the clothV have been left exposed, and when so left it is liable to be loosened and displaced, either by accident or as the result of use, or by the action of the pupil.
My invention consists in providing the frame of the slate with suitable grooves to receive the edges of the cloth, or other similar material, and protect them from displacement, as hereinafter more fully set forth.
In the drawings, A represents a slate-frame. b is a strip or" cloth or similar suitable material, the edges of which are inserted into grooves c, as shown in Fig. 3. As shown in this figure, these grooves are out at an angle, and the ends of the cloth, when inserted in such grooves, are completely protected by the wood, so'that such edges cannot be displaced by ordinary use; and the pupil cannot, without much diiculty, loosen the edge of the cloth at any point.
I do not limit myself to the form of groove I shown in Fig. 3; neither is it absolutely necessary that the wood protect the edges as perfectly as shown in Fig. 3.
The cloth can be held in place in any suitable manner. Glue or a suitable cement may be used.
In Figs. 5, 6, and 7, I have represented one other form of carrying out my invention in this respect, in which gures d is a narrow strip of cloth upon the outer edge of the frame, the edges ofthe cloth being let into grooves in the frame, and e c are strips upon the sides of the frame, the edges of the cloth being also let into the frame.
I do not regard this form as desirable as that shown in Fig. 3, because the edges of the cloth are not as well protected as in the other form, and there are more edges to be protected.
As represented, the noiseless material is not placed upon the ends of the frame, but the ends might be provided with such material.
When the noiseless material is placed over the edge of the frame, as shown in Fig. 3, I locate the grooves as near as may be to the outer edge ot the frame.
The inneredge of the frame is provided with a measure stamped on the frame, which has proved a desirable feature in use. In practice I use the common measure on one side, and the decimal form on the other side.
What I claim as new, and desire to secure by Letters Patent, is as follows:
A slate-frame provided with a continuous y groove or recess, in combination with a noise less material, the edges of said material being secured in the groove, substantially as and for the purpose set forth.
E. A. WEST, O. W. BOND.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US213028A true US213028A (en) | 1879-03-11 |
Family
ID=2282433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US213028D Expired - Lifetime US213028A (en) | Improvement in slate-frames |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US213028A (en) |
-
0
- US US213028D patent/US213028A/en not_active Expired - Lifetime
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