| We reached Barrie safely that night, and slept at the Queen's Arms. Next morning, I had an excellent opportunity of seeing this thriving village. It is very well situated on the shore of Kempenfeldt Bay, on ground rising gradually to a consider... Read more of Barrie And Big Trees A New Capital Of A New District—nature's Canal The Devil's Elbow—macadamization And Mud—richmond Hill at Emigrants.ca |  Informational.caPrivacy |
Steel MakingPyrometers For Molten MetalPyrometers for molten metal are connected to portable thermoc... Hardening Steel is hardened by quenching from above the upper critical.... Open Hearth Process The open hearth furnace consists of a big brick room with a l... Preventing Cracks In Hardening The blacksmith in the small shop, where equipment is usually ... Suggestions For Handling High-speed Steels The following suggestions for handling high-speed steels are ... Leeds And Northrup Optical Pyrometer The principles of this very popular method of measuring tempe... Rate Of Absorption According to Guillet, the absorption of carbon is favored by ... Detrimental Elements Sulphur and phosphorus are two elements known to be detrimen... The Penetration Of Carbon Carburized mild steel is used to a great extent in the manufa... Heat Treatment Of Milling Cutters Drills Reamers Etc THE FIRE.--Gas and electric furnaces designed for high heats ... Tungsten Tungsten, as an alloy in steel, has been known and used for a... Heating Of Manganese Steel Another form of heat-treating furnace is that which is used ... Liberty Motor Connecting Rods The requirements for materials for the Liberty motor connecti... Nickel-chromium A combination of the characteristics of nickel and the charac... Forging High-speed Steel Heat very slowly and carefully to from 1,800 to 2,000 deg.F.... Tempering Round Dies A number of circular dies of carbon tool steel for use in too... The Forging Of Steel So much depends upon the forging of steel that this operation... Protective Screens For Furnaces Workmen needlessly exposed to the flames, heat and glare from... Annealing Of High-speed Steel For annealing high-speed steel, some makers recommend using g... Air-hardening Steels These steels are recommended for boring, turning and planing... |
Brown Automatic Signaling PyrometerCategory: PYROMETRY AND PYROMETERS In large heat-treating plants it has been customary to maintain an operator at a central pyrometer, and by colored electric lights at the furnaces, signal whether the temperatures are correct or not. It is common practice to locate three lights above each furnace-red, white and green. The red light burns when the temperature is too low, the white light when the temperature is within certain limits--for example, 20 deg.F. of the correct temperature--and the green light when the temperature is too high. Instruments to operate the lights automatically have been devised and one made by Brown is shown in Fig. 130. The same form of instrument is used for this purpose to automatically control furnace temperatures, and the pointer is depressed at intervals of every 10 sec. on contacts corresponding to the red, white and green lights. Next: An Automatic Temperature Control Pyrometer Previous: Compensating Leads
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