RI 2419 REgulations Safeguarding coal-cutting machines

Minin,g Qr co􀖰l-cu.ttint􀖱 till:I chines are 1?;\i9ng the _m9􀖲t wideiy .used de1sses ()f mining equipment.· These 1T:.i:1Chines ,.--re practicaily t-tl\·operc1_ted eiyher_by compressed .iir or by electric. ·motors. According to &.ta• compiled _ from the 1􀖳22. issue COAL CATALOG\JE. OJMEINED WITH; OOAL "FIELD 'pf!:f􀖴C'TOTl1, bf 7,088. m􀖵nes from which reports were obttiined there -are 3􀖶895 mines that u.se coal-cutting eql;lipmen:ts,, 'f'hi􀖷 report lists 20,031: r.ct:lchines, 17,&75 being operated by·el􀖸ct􀖹:i.c.m<;>_tors··􀖺:r;id :the remtiinder by compressed 􀖻i.r motors,· ,-. · ', .. . · .. ··, .. _ ,· .,, .. .. . . . . . : ; "'l t:: On tl.Ccou-nt .. of the wide· use of coc:11-cutting -􀖼.:i"cliine_􀖽-􀖾 􀖿any Stat!;ls have issued regulationa as "to their operation dnd be to safety precautions that.should be observed J especially in gaseous mines.