The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
By use of silicone insulation and cold-rolled oriented silicon steel cores, dry-type transformers, with at least one-third less weight and volume compared with Class B insulation and having, up to forty percent weight reduction over oil-filled units, have been developed. Three basic types of transformers are considered.
Luminous sign cables are high-voltage cables without being generally recognized as such. They have a conductor of stranded copper, an insulation of natural or synthetic rubber (thermosetting), or of an extruded thermoplastic compound, and are finished in a variety of finishes: with saturated or lacquered braids (textile, glass) or with a vulcanized or extruded synthetic jacket. For reasons of economy...
Tung oil mixed with anhydrous ferric chloride solution is a very desirable filling compound for many applications because it will gel at room temperatures in a comparatively short time.
The development of rubber insulations capable of maintaining good electrical characteristics indefinitely in wet locations has made possible the manufacture of non-leaded underground cable.
The new anomalous electrical response recently found1 in simple ionic crystals has been studied in crystals of alkali halides containing foreign ions. The results obtained shed considerable light on the nature of the phenomenon in the pure crystal, and, in addition, indicate that it is possible to study the diffusion of foreign ions in ionic crystals with this method.
Progress along two lines of research was reported. First, viscosities of synthetic polyelectrolytes (obtained by adding butyl bromide to polyvinyl-pyridine) were measured in a series of mixtures of nitromethane and dioxane, covering the range of 40 to 16 in dielectric constant. It was found that the ratio of specific viscosity to concentration increased with dilution, in a way similar to the behavior...
The dielectric constants and loss factors of twenty-seven liquid organic halides have been measured at 1.27 and 3.2.2 cm. wavelength and used, together with certain additional measurements at 10 cm. and with measurements of viscosities, densities and refractive indices, to examine the accuracy of the equations for dielectric behavior and the relations between dielectric relaxation and molecular structure...
In order to define clearly the problem of selecting materials for use as semiconductor heating, elements, a review of the literature has been made from 113 source references and resistivity data has been compiled for 43 substances.
Recent measurements of specific heats1, and accurate equation-of-state data for hydrogen cyanide2 have indicated substantial amounts of polymerization in the vapor state. Despite many previous, determinations of its dipole moment3, no note of any effect that polymerization may have on the moment has been found in the literature. An attempt to find such an effect, and to correlate it quantitatively...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.