| Show MINES AND MINING MININ G EDITED BY F. F W. W SPRAGUE A KARNS IS 13 DOING GREAT fREA T WORK VORK Breaks All Al Air Drill Dri Records for Continuous Run Says r. r Engineer 1 TO SET UP UTAH MACHINE TO Will Wi Be Given Gien Th Thorough ro T Testing Testing Test Test- est est- Before Shipping to ing Ig j This Thi State f of the y Continued successful 5 test lost runs lun o Jarn 3 tunneling machine made mado at Boulder Colo Cob are aro attracting tho at attention at- at o of tho mo most t prominent mon men In lii Inthe the mining and railroad world according according ac ac- ac- ac cording to J. J It ii Bolcher president ent of or tho Utah Karns Tunneling Machine company compau who arrived arrive homo yesterday from Colorado At one of ot tho test 16 engineers rs runs luns last week he hc fas fa's says including Georgo Bancroft Ban Ban- I were yero present nt croft chief en engineer of or the Colorado L croft Southern railroad and two of at his associates During that test was waa mada made madea mad I a run of 40 minutes without a a shutdown shutdown shut shut- down which Mr Ir Bancroft Barcroft Mid ald ali broke broko the tho worlds world's worlds world's record for air drills In lit tha last four tour runs of ot last week cek the machine machno cut 11 1 feet feel nine inches of completed tunnel In four Cour hours and ten mInutes minute UP to this Hmo 6 65 Gi feet of ot tunnel has boon bored with with- one set act el of chisels and Mr Ir Belcher DeIcher says Bay thc chisels arc aro good for Cor at least 20 feet mol moro more He Ic believes believer that nothing can en stop tho machine making 40 10 feet a day when It Jt l J H In regular commis commis- Ion sion During two of or tho the tests taste boulders weighing pounds and more fell felli fel i between th the chisels on the big biff drill dri head It I was as thought thought h by most mOot of oC tho the onlookers that tho the machine would be beut put ut out of or commission But Dut In each cn case c the tho to operator simply drew tho the machine 18 ma zita- chine back and delivered a R full ful stroke upon the obstruction crushing It completely com corn without Injuring a single chisel I To Jo 1 rest Machine The Tho foot eight fOt machine owned b bythe by bythe the Utah comp company ny Is Js being sot set et up atthe at nt the India mine near Boulder Doulder and as soon oon as It shall shaH have havo o ha bo botn boen n tested to the satisfaction of f tho the mana management it I will wil bo be shipped to Utah to bo be placed upon tunnel contract work in inthis this j-this lUto Tho The Utah machine has a n number number num num- ber her of at Improvements over tho the six foot machine with which tho the Colora Colorado o Karns company has been making test teet runs The Colorado company is havInS hayIng hay hay- Ing InS made In Cleveland a n new foot dx-foot machine built bunt upon the samo saro lines as th Utah tah machine The now new machine it I Is said said will wi weigh four tour and a a half haJ tons less than tho the old ono ommo of oC tho the same sam sic yet et will wil have tho the same efficiency Tho The foot six foot machine Is run by J 30 hOrsepower and tho eJ foot eight toot ht-toot machine IB Is expected d to require not more moro than J horsepower 30 the power required b being le less Ies than was n-as was originally esti esti- mated mate |
