. Railway mechanical engineer . Fifty Tons Pressure Is Exerted on Riveting Dies Safety Valve for Pneumatic Motors safety valve combining simplicity,strength and durability, has been placed on themarket by the Pneumatic Safety Valve Company,VVoonsocket, R. I. This valve is designed to prevent acci-. Safety Valve Applied to Motor dent to machine operators, increase production and reducethe injury and breakage of cutting tools, such as drills,reamers, taps, etc. It is made in one size only for Nos. 1, 2, 3 and 4 non-reversible rotary machines and its use doesnot necessitate any exten


. Railway mechanical engineer . Fifty Tons Pressure Is Exerted on Riveting Dies Safety Valve for Pneumatic Motors safety valve combining simplicity,strength and durability, has been placed on themarket by the Pneumatic Safety Valve Company,VVoonsocket, R. I. This valve is designed to prevent acci-. Safety Valve Applied to Motor dent to machine operators, increase production and reducethe injury and breakage of cutting tools, such as drills,reamers, taps, etc. It is made in one size only for Nos. 1, 2, 3 and 4 non-reversible rotary machines and its use doesnot necessitate any extensions, alterations or change frompresent equipment. In operation the valve is attached directly to the machinein jilace of the customary air control handle. The air hoseis then attached to a .specially con.^tructed handle furnishedwith each valve, and the machine ojierated in the usual wa\The valve consists of a body .1, control valve B and cap nutC for regulating the pressure. If the air pressure is atS5 lb., the cap nut can be turned dow-n, thereby tighteningthe spring tension of the valve until air passes freely tothe macliine. When the cutting tool jams or binds by reasonof almormal resistance, a back pressure is instantl) createdwithin the valve chamber which the valve, shutting offthe air


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering