Show LEYNER sharpening MACHINES elsewhere in our advertising space will be lound found cuts and brief description of the new leyner drill sharpening machines these machines have many advantages tal es over any others on the market they are cheaper in first cost lighter in weight cheaper in freight have less parts require less air for operation require very small floor space and are very rapid and efficient in operation the drill steel is held between the dies by air pressure and not by levers and toggles as in most other machines the entire control of the machine is effected by one throttle as shown in the cut after the steel has been properly heated it is placed between the jaws by turning the thi throttle ottle to the proper position the lower half of the dies is raised to the upper half and the steel is thus held in position with strong pressure the bit is then ready to be formed arid and turning the throttle a little far A f if iff 7 A t arc A ther operates the drill hammer into which Js is fitted the dolly having the desired gauge and number of points this is simply an application of the hammer drill principle with the hammer striking the dolly the dolly is automatically brought back from contact with the drill bit after each blow the hammer makes about 1200 strokes per minute the efficiency to be obtained from any rock drill whether hammer or piston type depends upon the drill steel to a very great extent and in a great many machines the drill steel is not given careful and intelligent gen t attention even where the best blacksmiths are employed there is bound to be a variation in the drill bits with these machines however absolute uniformity of drill bits and abo gauge are positively assured and any boy can be taught to run the machine satisfactorily in a short time any mine having three or four drills in constant operation cannot afford to be with out this machine for the following reasons first it will do fully ten times as much work in dressing steel as a blacksmith and helper second it does not require an expensive operator third owing to the assurance of absolute gauge drill men will not be delayed fourth on account of the borrest shape of the bit there will be less trouble from binding in the hole and the drilling can be done much faster fifth actual tests have shown that drill bits bita sharpened in this machine last a can considerable sid erable time longer than those sharpened by hand on account of this the wear of the steel per inch of drilling is not nearly so great in large mines a plan has been adopted of placing one of these machines on each level un underground der ground so that it is not necessary to bring the drill steel to the surface for dressing many of the large mines use an oil furnace in connection with the sharpener which is much superior to th the e ordinary blacksmith forge for heating and dressing steel these machines are made in two sizes the no 1 size sharpens steel of any cross section and diameter up to and including one inch the no 2 machine sharpens steel of any cross section and diameter u up to 0 and including two inch with bits up to three inch diameter or larger jarger if desired full information in regard to these machines with prices and other particulars may ke had by addressing the G T idaer ingersoll machinery company general agents dooly block salt lake city utah |