. Railway mechanical engineer . half of the piston stroke with an approximatedie travel of 4J4 >n- At this point the maximum pressure isreached and the mechanism automatically changes to a simplelever action without a critical point in the pressure curve. Theremaining 11 in. of piston travel effects the last one inch of dietravel at uniform maximum pressure. By the use of a simplepressure regulating valve in the air supply line, the cylinder airpressure may be quickly changed to produce any desired pressureon the rivet dies within the rated tonnage of the machine. BIPOLAR OXYGEN AND HYDROGE
. Railway mechanical engineer . half of the piston stroke with an approximatedie travel of 4J4 >n- At this point the maximum pressure isreached and the mechanism automatically changes to a simplelever action without a critical point in the pressure curve. Theremaining 11 in. of piston travel effects the last one inch of dietravel at uniform maximum pressure. By the use of a simplepressure regulating valve in the air supply line, the cylinder airpressure may be quickly changed to produce any desired pressureon the rivet dies within the rated tonnage of the machine. BIPOLAR OXYGEN AND HYDROGENGENERATOR An apparatus for the manufacture of oxygen and hydrogen bythe electrolytic process has recently been brought out by the Inter-national Oxygen Company, Xew York. This is a bipolar deviceand is entirely different in construction and operation from theunit type generator built by the same company. The bipolar generator consists of a series of metallic platesclamped together in a heavy frame, electrically insulated from. Bipolar Continuous Oxygen and Hydrogen Generator one another, and separated by diaphragms of porous fabric. Eachpair of these plates forms a closed cell, divided by the dia-phragm. These cells are filled with the electrolyte—caustic pot-ash or soda—which acts as a conductor, the plates acting asthe electrodes. An electric current admitted at one end platepasses through the plates and the solution to the other endplate. In its passage it decomposes the water in the solutioninto the two gases, oxygen and hydrogen, which are released onopposite sides of each plate and emerge upward into the gasofftakes. The mingling of the oxygen and hydrogen in eachcell or compartment is prevented by the diaphragm which, while 45 46 RAILWAY MECHANICAL ENGINEER Vol. 90, No. 1 permitting the passage of the fluid, resists the passage of thegases. As the gases are released and withdrawn, the solutionis automatically replenished from a supply tank. The operationis continuou
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
