US1896042A - Insulated wire - Google Patents
Insulated wire Download PDFInfo
- Publication number
- US1896042A US1896042A US55738331A US1896042A US 1896042 A US1896042 A US 1896042A US 55738331 A US55738331 A US 55738331A US 1896042 A US1896042 A US 1896042A
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- United States
- Prior art keywords
- wire
- binder
- oil
- finely divided
- resinous
- Prior art date
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- Expired - Lifetime
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- 239000011230 binding agent Substances 0.000 description 39
- 238000000576 coating method Methods 0.000 description 28
- 239000011248 coating agent Substances 0.000 description 27
- 239000003921 oil Substances 0.000 description 24
- 235000019198 oils Nutrition 0.000 description 24
- 239000004327 boric acid Substances 0.000 description 12
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 11
- 238000009413 insulation Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- 210000003298 dental enamel Anatomy 0.000 description 8
- 150000001639 boron compounds Chemical class 0.000 description 7
- 239000011810 insulating material Substances 0.000 description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 6
- 230000001464 adherent effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000005011 phenolic resin Substances 0.000 description 6
- 229920001568 phenolic resin Polymers 0.000 description 6
- 239000002383 tung oil Substances 0.000 description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 5
- 229910000423 chromium oxide Inorganic materials 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000002966 varnish Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 150000001642 boronic acid derivatives Chemical class 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000000944 linseed oil Substances 0.000 description 3
- 235000021388 linseed oil Nutrition 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical class O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 240000003114 Salix fragilis Species 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 229910052614 beryl Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 125000005619 boric acid group Chemical group 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000019256 formaldehyde Nutrition 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- ZPPSOOVFTBGHBI-UHFFFAOYSA-N lead(2+);oxido(oxo)borane Chemical compound [Pb+2].[O-]B=O.[O-]B=O ZPPSOOVFTBGHBI-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229920001206 natural gum Polymers 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000012260 resinous material Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides
- H01B3/105—Wires with oxides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/904—Fastener or fastener element composed of nonmetallic material
- Y10S411/908—Resinous material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/914—Coated bolt
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
- Y10T428/2958—Metal or metal compound in coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
- Y10T428/31714—Next to natural gum, natural oil, rosin, lac or wax
Definitions
- This invention relates to an improved type of insulated wire.
- An object of the invention is to produce a wire having a flexible refractory insulation. 5
- a further object is the provision of a wire having a closely applied flexible insulating coating containing refractory inorganic material unaffected by hightemperatures.
- Another object is the provision of a wire having a refractory insulatingicoating which is resistant to moisture and abrasion.
- the organic binder or'carrier is distinguished particularly by the fact that to the usual tung oil varnishes or enamels which I have heretofore used as a carrier, I add a phenolic condensation product such as an oil-reactive phenolic'resin, produced by the combination of phenols and formaldehydes.
- the insulating or refractory material used in the insulating coating of this invention consists of one or more-of the insulating metal or metalloid com ounds, which include the oxides, borates, silicates, and in some cases nickel, copper, zinc, molybdenum, tungsten,
- borates, silicates or hydroxides of these elements form insulating compounds, these may be used.
- the preferred secondary binder is boric acid although other borates may be used. The materials used should be ground to as fine a state as ossible.
- varnish or enamel carrier e first step in preparation of the coating is the production of the varnish or enamel carrier.
- an enamel I described in my copending application 534,711 and generally it consists of an admixture of synthetic or 76 natural gum type water insoluble resins, drying oils such as tung oil and linseed oil which are heated together, and mineral or naptha thinners.
- a phenolic resinous compound which may preferably be added in the form of a mixture consisting of gallon tung oil, gallon aged raw linseed oil, two pounds of phenolic resin and 80 liquid ounces of mineral spirits, compounded in the following manner; the linseed oil and one pound of the phenolic resin is raised to 560 Fahrenheit in one half hour, held there for 15 minutes and the tung oil and the additional one pound resin then added. The mixture is then raised to 450 Fahrenheit in ten minutes and held to a fairly heavy drip (30-35 minutes). It is thinned direct.
- this phenolic compound may be added to the ordinary tung oil resinous enamel in a proportion of one part of the former to four parts of the latter.
- this is dependent upon the amount of abrasion resistance, elasticity and moisture proofv100 ness desired, the addition of the phenolic resin increasing these qualities according to [61 arately and then add them together, they may also be made as one varnish or enamel by boiling or heating the phenolic resin direct with the usual resinous tung oil varnishes.
- the phenolic resin has the pro erty of reacting with the drying oils and pro uces, in combination with the refractory material and the boric acid, a tough and adhesive coating. Where a plasticizing agent is desired to increase the flexibility of the coating, I add 1 to 2% of one of the well known plasticizing oils, such as castor oil.
- borate or secondary binder may be added in the form of a compound with the oil, insulating material or resin, instead of being mixed separately.
- a desirable insulating coating is then made by grinding materials in the following proportions: to 450 cc. of the prepared composite enamel, I add 180 grams of iron oxide, (preferably Fe O), 20 grams of chromium oxide, and 100 grams of boric acid, the mixture being milled until the various materials are thoroughly ground'
- the composition of the coating may be varied by increasing or decreasing the respective amounts of the enamel or of the oxides, depending upon the flexibility or insulation desired.
- the addition of the boric acid to the mixture is not for the purpose of obtaining a filler but solely to supply a secondary binder and effect a definite reaction between the resinous material and the boric acid.
- a continuous coating process is used in applying the insulation to the wire.
- the wire passes through cups containing the insulating compound or mixture, being heated and baked in furnaces located between the cups.
- the inorganic binder, the boric acid melts and binds the refractory oxide crystals, 9. reat part of the organic materials being ba ed ofi.
- the copper wire (1) has an insulatin coating thereon consisting of a mixture %1) of an oil phenolic-resin varnish, finely divided refractory oxide and boric acid, baked upon said wire.
- a wire having on its surface a closely adherent layer of flexible refractory insulation consisting substantially of finely divided insulating oxide held upon the wire by an oil phenol-resinous binder.
- a wire having on its surface a closely adherent layer of flexible refractory insulation in which the refractory material consists substantially of finely divided chromium oxide held upon the wire by an oil phenol-resinous binder.
- a wire having a flexible insulating coating consisting of finely divided non-fibrous inorganic insulating material, an oil phenolresinous binder and an inorganic binder compound eflective at elevated temperatures.
- a wire having a flexible insulating coating consisting of finely divided insulating oxide, an oil phenol-resinous binder and an inorganic binder compound effective at elevated temperatures.
- a wire having a flexible insulating coating consisting of finely divided nonfibrous inorganic insulating material, a boron compound and an oil phenol-resinous binder.
- a wire having a flexible insulating coating consisting of finely divided insulating oxide, a boron compound and an oil phenol-resinous binder.
- a wire having a flexible insulating coating consisting of a baked layer of a mixture of finely divided non-fibrous inorganic insulating material, an oil phenol-resinous binder, an inorganic binder compound, effective at elevated temperatures and a plasticizing agent.
- a wire having a flexible insulating coating consisting of a baked mixture of finely divided oxide, an oilphenol-resinous binder and an inorganic binder compound effective at elevated temperatures.
- a Wire having a flexible insulating coating consisting substantially of finely divided chromium oxide, an oil phenol-resinous binder and an inorganic binder compound effective at elevated temperatures.
- a wire having a flexible insulating coating consisting substantially of finely divided chromium oxide, an oil phenol-resinous binder and a. boron compound.
- a wire having a flexible insulating coating consisting substantially of finely divided chromium oxide, an oil phenol-resinous binder and boric acid.
- a wire having a flexible insulating 40 coating consisting substantially of finely divided titanium oxide, an oil phenol-resinous binder and an inorganic, binder compound eifective at elevated temperatures.
- a wire having a flexible insulating coating consisting substantially of finely divided titanium oxide, an oil phenol-resinous binder and a boron compound.
- a wire having a flexible insulating coating consisting substantially of finely divided iron oxide, an oil phenol-resinous binder and an inorganic compound eflective at elevated temperatures.
- a wire having a flexible insulating coating consisting substantially of finely divided iron oxide, an oil phenol-resinous binder and a boron compound.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Description
J .-=31,1933. V w s. RUBEN 1,896,042
INSULATED WIRE Filed Aug. 15, 1931 I Inventor P m \I Attorney Patented Jan. 31, 1933 UNITED STATES PATENT OFFICE SAMUEL RUBEN, 01' NEW ROCIELLE, NEW YORK, ASSIGNOB, TO vma MANUFACTURING CORPORATION, OF wnumo'ron, DELAWARE, A CORPORATION OI DELAWARE INSULATED WIRE Application filed August 15, m1. Seriai in. 557,888.
This invention relates to an improved type of insulated wire.
An object of the invention is to produce a wire having a flexible refractory insulation. 5 A further object is the provision of a wire having a closely applied flexible insulating coating containing refractory inorganic material unaffected by hightemperatures.
Another object is the provision of a wire having a refractory insulatingicoating which is resistant to moisture and abrasion.
Other objects will be apparent from the description of the invention and from the drawing in which is shown an insulated wire made in accordance with the invention.
Thisapplication is a continuation in part of my applications filed December 3, 1930, Serial Numbers 499,845 and534,711 of May 2,- 1931. As stated in those applications, I
have foundthat in order to properly coat a wire with an insulating material having the desired characteristics it is desirable also to have 1) a flexible binder of the resinous type to give a proper bond at low temperature and (2) a further binder, which material is to be effective at high temperature; this binder must be of the inorganic type such as boric acid or lead borate. This second and most important binder serves two purposes; one,
.30 it binds the refractory and insulating material at high temperature; two, it prevents scaling and undesirable surface oxidation. In the aforementioned applications I described a coating comprising generally a refractory metallic compound, a or resinous binder and a borate or 0t or inorganic relatively high temperature binding agent. In the present invention, the organic binder or'carrier is distinguished particularly by the fact that to the usual tung oil varnishes or enamels which I have heretofore used as a carrier, I add a phenolic condensation product such as an oil-reactive phenolic'resin, produced by the combination of phenols and formaldehydes. i
The insulating or refractory material used in the insulating coating of this invention, consists of one or more-of the insulating metal or metalloid com ounds, which include the oxides, borates, silicates, and in some cases nickel, copper, zinc, molybdenum, tungsten,
lead, thorium, zirconium. Where the borates, silicates or hydroxides of these elements form insulating compounds, these may be used. Mixtures containing more than one compound, for example, beryl or mica, can also 05 be used in combination or otherwise. The preferred secondary binder is boric acid although other borates may be used. The materials used should be ground to as fine a state as ossible.
e first step in preparation of the coating is the production of the varnish or enamel carrier. Such an enamel I described in my copending application 534,711 and generally it consists of an admixture of synthetic or 76 natural gum type water insoluble resins, drying oils such as tung oil and linseed oil which are heated together, and mineral or naptha thinners.
In the present invention, I add to this 80 enamel a phenolic resinous compound which may preferably be added in the form of a mixture consisting of gallon tung oil, gallon aged raw linseed oil, two pounds of phenolic resin and 80 liquid ounces of mineral spirits, compounded in the following manner; the linseed oil and one pound of the phenolic resin is raised to 560 Fahrenheit in one half hour, held there for 15 minutes and the tung oil and the additional one pound resin then added. The mixture is then raised to 450 Fahrenheit in ten minutes and held to a fairly heavy drip (30-35 minutes). It is thinned direct. For satisfactory results I have found that this phenolic compound may be added to the ordinary tung oil resinous enamel in a proportion of one part of the former to four parts of the latter. However, this is dependent upon the amount of abrasion resistance, elasticity and moisture proofv100 ness desired, the addition of the phenolic resin increasing these qualities according to [61 arately and then add them together, they may also be made as one varnish or enamel by boiling or heating the phenolic resin direct with the usual resinous tung oil varnishes. The phenolic resin has the pro erty of reacting with the drying oils and pro uces, in combination with the refractory material and the boric acid, a tough and adhesive coating. Where a plasticizing agent is desired to increase the flexibility of the coating, I add 1 to 2% of one of the well known plasticizing oils, such as castor oil.
It is recognized, of course, that the borate or secondary binder may be added in the form of a compound with the oil, insulating material or resin, instead of being mixed separately.
A desirable insulating coating is then made by grinding materials in the following proportions: to 450 cc. of the prepared composite enamel, I add 180 grams of iron oxide, (preferably Fe O), 20 grams of chromium oxide, and 100 grams of boric acid, the mixture being milled until the various materials are thoroughly ground' The composition of the coating may be varied by increasing or decreasing the respective amounts of the enamel or of the oxides, depending upon the flexibility or insulation desired. The addition of the boric acid to the mixture is not for the purpose of obtaining a filler but solely to supply a secondary binder and effect a definite reaction between the resinous material and the boric acid. This reaction cannot be ac complished however, unless this mixture is heated to 185 centigrade, at which temperature the boric acid melts and reacts with the resins and other materials. The resultant product, as it appears on the wire, is hard and stable and not affected by humidity or other atmospheric effects. The heat is applied as the coated wire goes through the ovens. I have found that unless the coating be heated to at least 185 centigrade, an impracticable and unstable coating is had which in the course of a few days will disclose on its surface the growth of large horic acid crystals due to absorption of moisture, the
- coating losing flexibility, becoming powder like and readily fracturing off the base. The electrical breakdown potential and insulation will also continuously reduce. But if the coating is heat treated to the melting and reacting point of the boric acid, the foregoing difiiculties are eliminated and no ageing effect is experienced.
A continuous coating process is used in applying the insulation to the wire. The wire passes through cups containing the insulating compound or mixture, being heated and baked in furnaces located between the cups.
During the heating, the inorganic binder, the boric acid, melts and binds the refractory oxide crystals, 9. reat part of the organic materials being ba ed ofi.
- Even though the wire, in use, is heated to a point where the organic binder is disengaged, no harm results due to the presence of the inorganic binder, boric acid. The use of this borate in the coating is also of assistance in dispensing with the necessity of a flux in soldering the wire, particularly when copper wire is coated.
In the accompanying drawing, illustrative of the invention, the copper wire (1) has an insulatin coating thereon consisting of a mixture %1) of an oil phenolic-resin varnish, finely divided refractory oxide and boric acid, baked upon said wire.
I claim:
1. A wire having on its surface a closely adherent layer of flexible refractory insulation consisting substantially of finely divided insulating oxide held upon the wire by an oil phenol-resinous binder.
2. A wire having on its surface a closely adherent layer of flexible refractory insulation in which the refractory material consists substantially of finely divided chromium oxide held upon the wire by an oil phenol-resinous binder.
3. A wire having on its surface a closely ad" herent layer of a flexible refractory insulation consisting substantially of finely divided titanium oxide held upon the wire by an oil phenol-resinous binder.
4:. A wire having on its surface a closely adherent layer of a flexible refractory insulation consisting substantially of finely divided iron oxide held upon the wire by an oil phenol-resinous binder.
5. A wire having on its'surface a closely adherent layer of flexible refractory insulation consisting substantially of the combination of non-fibrous inorganic insulating matter and an inorganic binding material, held upon the wire by an oil phenol-resinous I,
binder.
6. A wire having on its surface a closely adherent layer of flexible refractory insulation consisting substantially of the combination of non-fibrous inorganic insulating matter and a boron compound, held upon the wire by an oil phenol-resinous binder.
7. A wire having on its surface a closely adherent layer of flexible refractory insulation consisting substantially of the combination of finely divided insulating oxide and a boron compound, held upon the wire by an oil phenol-resinous binder.
8. A wire having a flexible insulating coating consisting of finely divided non-fibrous inorganic insulating material, an oil phenolresinous binder and an inorganic binder compound eflective at elevated temperatures.
9. A wire having a flexible insulating coating consisting of finely divided insulating oxide, an oil phenol-resinous binder and an inorganic binder compound effective at elevated temperatures.
6 10. A wire having a flexible insulating coating consisting of finely divided nonfibrous inorganic insulating material, a boron compound and an oil phenol-resinous binder.
10 11. A wire having a flexible insulating coating consisting of finely divided insulating oxide, a boron compound and an oil phenol-resinous binder.
12. A wire having a flexible insulating coating consisting of a baked layer of a mixture of finely divided non-fibrous inorganic insulating material, an oil phenol-resinous binder, an inorganic binder compound, effective at elevated temperatures and a plasticizing agent.
13. A wire having a flexible insulating coating consisting of a baked mixture of finely divided oxide, an oilphenol-resinous binder and an inorganic binder compound effective at elevated temperatures.
14. A Wire having a flexible insulating coating consisting substantially of finely divided chromium oxide, an oil phenol-resinous binder and an inorganic binder compound effective at elevated temperatures.
15. A wire having a flexible insulating coating consisting substantially of finely divided chromium oxide, an oil phenol-resinous binder and a. boron compound.
16. A wire having a flexible insulating coating consisting substantially of finely divided chromium oxide, an oil phenol-resinous binder and boric acid.
17. A wire having a flexible insulating 40 coating consisting substantially of finely divided titanium oxide, an oil phenol-resinous binder and an inorganic, binder compound eifective at elevated temperatures.
18. A wire having a flexible insulating coating consisting substantially of finely divided titanium oxide, an oil phenol-resinous binder and a boron compound.
19. A wire having a flexible insulating coating consisting substantially of finely divided iron oxide, an oil phenol-resinous binder and an inorganic compound eflective at elevated temperatures.
20. A wire having a flexible insulating coating consisting substantially of finely divided iron oxide, an oil phenol-resinous binder and a boron compound.
In testimony whereof I affix m signature.
' SAMUEL iiUBEN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US55738331 US1896042A (en) | 1931-08-15 | 1931-08-15 | Insulated wire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US55738331 US1896042A (en) | 1931-08-15 | 1931-08-15 | Insulated wire |
Publications (1)
Publication Number | Publication Date |
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US1896042A true US1896042A (en) | 1933-01-31 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US55738331 Expired - Lifetime US1896042A (en) | 1931-08-15 | 1931-08-15 | Insulated wire |
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US (1) | US1896042A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2420644A (en) * | 1942-06-16 | 1947-05-20 | Pemco Corp | Flameproofing of fabrics and composition therefor |
US2493609A (en) * | 1947-04-19 | 1950-01-03 | Gen Electric | Coating compositions for magnetic materials |
US2522656A (en) * | 1944-09-21 | 1950-09-19 | Bostitch Inc | Method of producing sticks or refills containing fasteners |
US2553666A (en) * | 1949-01-15 | 1951-05-22 | Primeweld Corp | Method of impregnating and cooling electric windings |
US2571700A (en) * | 1946-05-03 | 1951-10-16 | Pittsburgh Corning Corp | Method of coating thermocouples |
US2712533A (en) * | 1950-10-23 | 1955-07-05 | Borden Co | Lamp basing cement containing sodium silicate-magnesium oxide bonding mixture |
US2806109A (en) * | 1954-03-19 | 1957-09-10 | Westinghouse Electric Corp | Arc resistant molded members and electrical apparatus embodying them |
US2864782A (en) * | 1955-06-30 | 1958-12-16 | Borden Co | Lamp basing cement containing boric acid and heat-curable formaldehyde condensation resin |
US2883352A (en) * | 1955-06-28 | 1959-04-21 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | High temperature resistant molding composition containing phenol formaldehyde condensation product |
US2982664A (en) * | 1960-02-29 | 1961-05-02 | Frenchtown Porcelain Company | Ceramic body |
US3151002A (en) * | 1959-09-26 | 1964-09-29 | Zahnradfabrik Friedrichshafen | Methods of selective carburization of ferrous metal surfaces and materials therefor |
US4507362A (en) * | 1983-10-12 | 1985-03-26 | At&T Bell Laboratories | Restorative spray coating for insulated copper conductors |
-
1931
- 1931-08-15 US US55738331 patent/US1896042A/en not_active Expired - Lifetime
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2420644A (en) * | 1942-06-16 | 1947-05-20 | Pemco Corp | Flameproofing of fabrics and composition therefor |
US2522656A (en) * | 1944-09-21 | 1950-09-19 | Bostitch Inc | Method of producing sticks or refills containing fasteners |
US2571700A (en) * | 1946-05-03 | 1951-10-16 | Pittsburgh Corning Corp | Method of coating thermocouples |
US2493609A (en) * | 1947-04-19 | 1950-01-03 | Gen Electric | Coating compositions for magnetic materials |
US2553666A (en) * | 1949-01-15 | 1951-05-22 | Primeweld Corp | Method of impregnating and cooling electric windings |
US2712533A (en) * | 1950-10-23 | 1955-07-05 | Borden Co | Lamp basing cement containing sodium silicate-magnesium oxide bonding mixture |
US2806109A (en) * | 1954-03-19 | 1957-09-10 | Westinghouse Electric Corp | Arc resistant molded members and electrical apparatus embodying them |
US2883352A (en) * | 1955-06-28 | 1959-04-21 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | High temperature resistant molding composition containing phenol formaldehyde condensation product |
US2864782A (en) * | 1955-06-30 | 1958-12-16 | Borden Co | Lamp basing cement containing boric acid and heat-curable formaldehyde condensation resin |
US3151002A (en) * | 1959-09-26 | 1964-09-29 | Zahnradfabrik Friedrichshafen | Methods of selective carburization of ferrous metal surfaces and materials therefor |
US2982664A (en) * | 1960-02-29 | 1961-05-02 | Frenchtown Porcelain Company | Ceramic body |
US4507362A (en) * | 1983-10-12 | 1985-03-26 | At&T Bell Laboratories | Restorative spray coating for insulated copper conductors |
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