Blar i NGU Open Archive på forfatter "Bull, J."
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Elektrisk metalsmelting. Forsøk og undersøkelser utført ved marinens torpedo- og minefabrik i samarbeide med Statens Raastofkomite
Bull, J. (NGU (104), Journal article, 1922)Preliminary tests have been gone through with: 1. Arcfurnaces. 2. Resistance- furnaces. 3. Inductionfurnaces. 4. Electrically heated crucibles. The last type was chosen for tests on a technical scale, two 200 lbs. furnaces ... -
Prøver med en hærdeovn for kulstofstaal. Wild Barfield's patent: forsøk og undersøkelser utført ved marinens torpedo- og minefabrik i samarbeide med Statens Raastofkomite.
Bull, J. (NGU (118), Journal article, 1923)The first pages are devoted to a brief description of the phenomena upon which the hardening process of steel is based. Hardening temperatures are quoted and the magnetic conditions in steel are roughly described and ...