Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7108807 | Methods for producing a dielectric, dielectric having self-generating pores, monomer for porous dielectrics, process for preparing poly-o-hydroxyamides, process for preparing polybenzoxazoles, and processes for producing an electronic component Poly-o-hydroxyamides include binaphthyl substituents as repeating units. The poly-o-hydroxyamides can be cyclized to give the polybenzoxazole by heating. Pore formation occurs, so that a dielectric having a very low dielectric constant k of less than 2.5 is obtained... | 09/19/2006 |
| 7030050 | Glass ceramic mass and use thereof The invention relates to a glass ceramic mass containing at least one oxide ceramic containing barium, titanium and at least one rare earth metal Rek; and at least one glass material containing at least one oxide with boron, at least one oxide with silicon and at le... | 04/18/2006 |
| 6316542 | Crosslinkable dielectric composition The invention relates to a crosslinkable impregnating dielectric composition comprising a polydiene polyol, a polyisocyanate and a chemically inert liquid filler, (an insulating liquid) characterized in that a sufficient amount of the said liquid filler i... | 11/13/2001 |
| 6048618 | Impregnating compounds for self-healing capacitors The present invention relates to the use of insulating fluids, selected from the group consisting of aliphatic esters, alkylbenzenes, crosslinkable compositions comprising at least one polydiene polyol, at least one polyisocyanate and at least one chemica... | 04/11/2000 |
| 5081333 | Electric discharge machining fluid with a fatty acid amide additive for rust inhibition Rust inhibitors for electrical discharge machining solutions. Each preventive is composed of a fatty acid amide which has been obtained by dehydrating and condensing at least one fatty acid and at least one alkanolamine.... | 01/14/1992 |
| 4770816 | Insulating oil and electrical apparatus filled with the same An insulating oil containing N,N-bis(2-hydroxyethyl)-N-cyclohexylamine at 0.5 mg/l or more. An electrical apparatus is filled with the insulating oil in which a copper component is immersed. During operation of the apparatus for a long period of time, the... | 09/13/1988 |
| 4716084 | Oil-impregnated capacitor An oil-impregnated capacitor made by winding at least one plastic film impregnated with an electrical insulating oil comprising 1-phenyl-1-methylphenylethane in which 1-phenyl-1-(4-methylphenyl)ethane and 1-phenyl-1-(2-methyl)ethane are present in amounts... | 12/29/1987 |
| 4594642 | Impregnating oil for a capacitor comprising two metallized plastic films and the capacitor impregnated with the oil Disclosed herein are an impregnating oil prepared by admixing an isocyanate compound of tolylene diisocyanate and/or 4,4-diisocyanate-3,3-dimethyldiphenyl with an insulating oil of 1-tolyl-2-phenylethane, 1-ethylphenyl-2-phenylethane, 1-isopropylphen... | 06/10/1986 |
| 4507333 | Biphenylene end-capped quinoxaline polymers and their use as insulating coatings for semiconductor devices An insulating or masking film for semiconductor devices formed by curing applied coatings of biphenylene end-capped quinoxaline polymers.... | 03/26/1985 |
| 4449163 | AC Capacitor and impregnant therefor An AC metallized film capacitor having a plurality of electrodes separated by a dielectric spacer contains a dielectric fluid and 2 to 10% of -naphthyl isocyanate as impregnant system to scavenge moisture and to improve capacitance retention.... | 05/15/1984 |
| 4317159 | AC Capacitor and impregnant therefor An AC metallized film capacitor having a plurality of electrodes separated by a dielectric spacer contains as its impregnant system a dielectric fluid and 1-20% of an aliphatic or aromatic isocyanate having unreacted NCO groups to improve life characteris... | 02/23/1982 |
| 4220547 | Dielectric paste for thick film capacitor A dielectric paste for a thick film capacitor comprises barium titanate powder, glass frit, magnetite powder, an organic vehicle and a surface-active agent. A dielectric constant higher than 1,100 is obtained by firing at a temperature of 900° C. or lowe... | 09/02/1980 |
| 4110496 | Dielectric system for an electrical apparatus An improved dielectric system for an electrical apparatus. The dielectric system includes a polymeric film impregnated with low molecular weight polybutene having an average number molecular weight in the range of 300 to 500. The dielectric system has imp... | 08/29/1978 |
| 4060583 | Electrically insulating composition An electrically insulating composition especially adapted for insulating terminations or splices of oil-impregnated cables comprises an electrically insulating organic liquid and a reactive thickening agent. Initially the composition is a liquid having a ... | 11/29/1977 |
| 4058478 | Liquid crystal esters Liquid crystal substances or compounds of the formula ##STR1## wherein R is as hereinafter set forth, AS WELL AS COMPOSITIONS AND ELECTRO-OPTICAL APPARATUSES CONTAINING THEM ARE DESCRIBED.... | 11/15/1977 |
| 4019996 | Dielectric compositions Liquid dielectric compositions useful as electrical insulators are comprised of [1] a liquid dielectric component of known type, in combination with [2] at least one member selected from the group consisting of monocyanophenoxybenzene, monocyanodiphenyl a... | 04/26/1977 |
