Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 382
72 FORGING flame of the forge, and lieating until the oil burns over the entirespring. If the spring is not uniform in section throughout, it is gen-erally advisable, while heating it, to plunge every few seconds intothe oil bath, taking it out instantly and continuing the heating. This … FiR. i:iO.momentary piuige tends to e(|ualize the heat hy cooling the thinnerparts. Lard oil or Ksii oil arc generally used as mineral oil is too uncertainin composition. The above method of tempering is known as blazingofj, the blazing point of the oil being used to indicate the temperaturein…
Mechanical engineering
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