US956870A - Refractory waterproof insulating compound. - Google Patents
Refractory waterproof insulating compound. Download PDFInfo
- Publication number
- US956870A US956870A US17200903A US1903172009A US956870A US 956870 A US956870 A US 956870A US 17200903 A US17200903 A US 17200903A US 1903172009 A US1903172009 A US 1903172009A US 956870 A US956870 A US 956870A
- Authority
- US
- United States
- Prior art keywords
- soapstone
- refractory
- insulating compound
- waterproof insulating
- cryolite
- 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
- 150000001875 compounds Chemical class 0.000 title description 7
- 229910001610 cryolite Inorganic materials 0.000 description 9
- 239000004927 clay Substances 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000010436 fluorite Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
Definitions
- This invention relates to compounds for insulating electric conductors, protecting portions of.electrical apparatus from heat, i ipporting electrical instruments, and the
- the object of the invention is to provide for these purposes a cheap and efficient composition of matter which is easily machined, has good insulating properties, is capable of resisting a high degree of heat, and is nonhygroscopic.
- the composition which we have invented to meet these requirements is made of soapstone and a refractory adulterant, such as clay, ground to a owder and bonded with a flux having a re atively low melting point, such as cryolite.
- the ingredients are mixed, moistened, molded under pressure, dried and fired.
- soapstone sixty-four parts by weight clay or other refractory adulterant thirty-four parts, and cryolite four parts, but these figures can be considerably varied to suit requirements.
- These ingredients are finely ground and mixed together in a moist condition, filled into molds, and subjected to heavy pressure by a hydraulic press or otherwise.
- the formed article is then removed from the mold, dried, and fired at a temperature of from 900 to 1100 de ees centi- At this cat the 'cryolite fuses slig itly and bonds together the soapstone and clay. It is essential to use a temperature low enough to preserve in an unchanged condition the original properties of the soapstone, so that it will remain in a condition soft enough to be drilled or machined.
- cryolite is preferred, however, because it is less hygroscopic than the carbonate and gives a better fluxing effect than fluor spar, the essential point being to use a substance which will satisfac torily bond the soapstone and clay at a low heat and leave the productmoderately hard, tough, and proof against ordinary hygroscopic moisture.
- the compound can be used for arc-chutes in controllers, panels for switches, insulators for electric conductors, and in many other places where a fire-proof, non-hy roscopic insulator is wanted. It can be dri led and machined with the same ease as pure soapstone, and its non-hy roscopic qualities make it especially usefu for instrumentsupporting anels in damp locations.
- An insulatin compound consisting of soapstone, a re rectory adulterant, and slightly fused cryolite.
- An insulating compound consistiiu of soapstone, clay and slightly fused cryo lite.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Insulating Materials (AREA)
Description
"rade preferably 950 de ees UNITED STATES PATENT OFFICE.
WILLIAM H. WRIGHT AND JOSEPH HOFFMAN, 0F SCHENECTADY, NEW YORK, ASSIGN- ORS TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.
No Drawing.
Specification of Letters Patent.
Patented May 3, 1910.
To all whom it may concern:
Be it known that we, WILLIAM H. WRIGHT and JOSEPH HOFFMAN, citizens of the United States, residing at Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Improvements in Refractory Waterproof Insulating Compounds, of which the following is a specification.
This invention relates to compounds for insulating electric conductors, protecting portions of.electrical apparatus from heat, i ipporting electrical instruments, and the The object of the invention is to provide for these purposes a cheap and efficient composition of matter which is easily machined, has good insulating properties, is capable of resisting a high degree of heat, and is nonhygroscopic. The composition which we have invented to meet these requirements is made of soapstone and a refractory adulterant, such as clay, ground to a owder and bonded with a flux having a re atively low melting point, such as cryolite. The ingredients are mixed, moistened, molded under pressure, dried and fired.
Entering more into details, it should be stated that the preferred proportions are as follows: soapstone sixty-four parts by weight, clay or other refractory adulterant thirty-four parts, and cryolite four parts, but these figures can be considerably varied to suit requirements. These ingredients are finely ground and mixed together in a moist condition, filled into molds, and subjected to heavy pressure by a hydraulic press or otherwise. The formed article is then removed from the mold, dried, and fired at a temperature of from 900 to 1100 de ees centi- At this cat the 'cryolite fuses slig itly and bonds together the soapstone and clay. It is essential to use a temperature low enough to preserve in an unchanged condition the original properties of the soapstone, so that it will remain in a condition soft enough to be drilled or machined.
In'place of theclay we may use any suitable refractory substance, and as a substitute for the cryolite we ma use any binder having a melting point so lbw that the soapstone Application filed September 4, 1903. Serial No. 172,009.
remains unchanged, such as sodium carbonate, or fluor spar. The cryolite is preferred, however, because it is less hygroscopic than the carbonate and gives a better fluxing effect than fluor spar, the essential point being to use a substance which will satisfac torily bond the soapstone and clay at a low heat and leave the productmoderately hard, tough, and proof against ordinary hygroscopic moisture.
The compound can be used for arc-chutes in controllers, panels for switches, insulators for electric conductors, and in many other places where a fire-proof, non-hy roscopic insulator is wanted. It can be dri led and machined with the same ease as pure soapstone, and its non-hy roscopic qualities make it especially usefu for instrumentsupporting anels in damp locations.
In accor ance with the patent statutes, we have described the principle of operation of our invention together with what We consider to represent the best embodiment thereof; but we desire to have it understood that the invention can be carried out in other ways,-and we do not limit ourselves to the precise ingredients or the exact proportions hereinbefore stat-ed.
What we claim as new and desire to secure by Letters Patent of the United States, is
1. An insulatin compound, consisting of soapstone, a re rectory adulterant, and slightly fused cryolite.
2,. An insulating compound, consistiiu of soapstone, clay and slightly fused cryo lite.
3. An insulating compound, consisting of soapstone, clay and cryolite, ground, moistoned, mixed, compressed and fired sufficiently to sli htly fuse the cryolitea 4. An artificial stoneconsisting of ground soapstone, a refractory adulterant,'and cryo lite fused sufficiently to bind the ingredients together but without destroying the physical characteristics of the soapstone. 1
In witness whereof, we have hereunto set our hands this 3rd day' of September, 1903.-
Witnesses:
BENJAMIN B. HULL, HELEN ORFORD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17200903A US956870A (en) | 1903-09-04 | 1903-09-04 | Refractory waterproof insulating compound. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17200903A US956870A (en) | 1903-09-04 | 1903-09-04 | Refractory waterproof insulating compound. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US956870A true US956870A (en) | 1910-05-03 |
Family
ID=3025273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US17200903A Expired - Lifetime US956870A (en) | 1903-09-04 | 1903-09-04 | Refractory waterproof insulating compound. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US956870A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2630512A (en) * | 1946-02-27 | 1953-03-03 | Rahbek Knud | Semiconductor unit |
-
1903
- 1903-09-04 US US17200903A patent/US956870A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2630512A (en) * | 1946-02-27 | 1953-03-03 | Rahbek Knud | Semiconductor unit |
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