Electrical news and engineering . ife blades and thin steelsheets. One .of the miscellaneous applications which havebeen suggested is in the manufacture of centrifugal castings. In order to provide high frequency power required forthis type of heating, a frequency converter is employed forsizes up to 20 kvv. per phase, which consist of an oil coolediransfornur with internal reactance, a set of static conden-sers, and a metal discharge gap. For larger capacities, itseems jjrobable that a high frequency alternating currentgenerator will be required. Such generators are cdilainaUleand in fact hav
Electrical news and engineering . ife blades and thin steelsheets. One .of the miscellaneous applications which havebeen suggested is in the manufacture of centrifugal castings. In order to provide high frequency power required forthis type of heating, a frequency converter is employed forsizes up to 20 kvv. per phase, which consist of an oil coolediransfornur with internal reactance, a set of static conden-sers, and a metal discharge gap. For larger capacities, itseems jjrobable that a high frequency alternating currentgenerator will be required. Such generators are cdilainaUleand in fact have been built. Heating Applications—Future It seems unquestionable that the field of industrial heat-ing liy electricity will extend greatly, owing to the superiorresults of one kind or another usually )erienced. It willaccordingly extend particularly in the industries in which ithas already started. Glass annealing will undoubtedly be done to a mucligreater extent by electricity. .\ total possible connecte<l. Fig, 8—Carbon plate resister type load of kw. has been estimated. In the textile in-dustry, the slashers, tenteriug machines and singeing nia-cbines will proliably l)e electrified, as well as the dye vats and various other applications,sion of electric heating into thivantages have been indicated; (1) More uniform heating of liquids, dyes and size. (2) More uniform consistenicy of liquids in dye vats, etc.(:;) Eliinination of steam piping and its losses. (4) Higher temperature, taking the place of adilitionaldry cans in increasing production. (}) Higher temperatures are desirable in calender rollsand more uniform temperatures throughout rolls thati ob-tainal)le with steam or gas heat. In the paper industrj-, particularly where power Is cheapor waste hydro-electric power available, there slioubl be fur-ther use of electrical heat. This will probaldy be in theclyinders of the board machine, in the calenders and in thegeneral steam requirements
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