Show NEW MINE ventilating BLOWER MADE IN UTAH FOR SMALL MINES P JAT belcher iye well 11 known local ventilating engineer and district agent for the bayley blower company and coppus engineering corporation has designed and started production of a new cast iron centrifugal volume blower intended to suit the requirements of small isolated mines and prospects where a belt driven unit is more convenient and adaptable than motor driven V or compressed air driven units as utilized by the larger mines the new unit which is 1 built complete in salt lake is furnished with cast iron volute casing and ball bearing bearin pedestal having lubrication and has special alu minum copper alloy impeller suitable for high speeds the volute casing is so designed that any desired angle of discharge maybe may be obtained merely by adjusting two set screws the durvent ventilating fan the unit will be marketed un der the trade name of duo vent and is regularly furnished with outlet for standard ja 6 in vent pipe when driven at a speed of r p m it will deliver cubic feet per minute through feet of fa in pipe requiring a 1 h p motor or engine ifor for its operation 5 tion |