The polishing and plating of metals; a manual for the electroplater, giving modern methods of polishing, plating, buffing, oxydizing and lacquering metals, for the progressive workman . Fig. 67. Interior view of Fig. 66, showing resistance bars in porcelain are of a special metal fused in porcelain and attached to theirrespective contact pieces. They are made in various sizesand with initial drop in voltage according to the circuit onwhich they are to be used. One further point needs to be taken into consideration instudying the line connections, which is that where the con-ducting mains are s
The polishing and plating of metals; a manual for the electroplater, giving modern methods of polishing, plating, buffing, oxydizing and lacquering metals, for the progressive workman . Fig. 67. Interior view of Fig. 66, showing resistance bars in porcelain are of a special metal fused in porcelain and attached to theirrespective contact pieces. They are made in various sizesand with initial drop in voltage according to the circuit onwhich they are to be used. One further point needs to be taken into consideration instudying the line connections, which is that where the con-ducting mains are shown to be faulty, so that they drop thepressure continuously with the increase of distance from thetank, and the plater is not allowed to increase the size of his THE POLISHING AND PLATING OK METALS. 95 mains to what they should he, he can often minimize the evilby placing the solutions in his tanks so that those requiringthe highest voltage will be nearest the dynamo, where thepressure is greatest and those requiring the lowest voltage. Fig. 68. Showing Rheostat in Field of Dynamos. shall be farthest away where the pressure is least. This issimply making the best of a bad state of effairs, but it willoften help out considerably where it can be done. In suchcases the rheostats, if they are alike, will give different pres-sures and different quantities of current on the correspond-ing segments at each tank for the roasor. that the tank pres-sure is less as they get further away, so that nothing shouldbe taken for granted but a separate table made for each onefrom actual readings while at work. In using the ampere meter, one peculiarity of the electricaldistribution of power should not be forgotten. That is, the I96 THE POLISHING AND PLATING OF METALS. generation of current is in proportion to the work to be if you are testing a rheostat with a capacity of 350 am-peres, you will not get 350 amperes unless your tank is so fullof work and anodes that such an amount will
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectelectro, bookyear1904
