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 . instruments with a different scale. They are very finelymade, move on jewels like the pivots of a watch, and areconstructed of material having such resistance that they maybe left permanently in circuit. The amount of electricityused is too insignificant to be noticed and hence all costconnected with their use is limited to the installation of theinstrument and any breakage that may be encountered dur- THE POLI
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 . instruments with a different scale. They are very finelymade, move on jewels like the pivots of a watch, and areconstructed of material having such resistance that they maybe left permanently in circuit. The amount of electricityused is too insignificant to be noticed and hence all costconnected with their use is limited to the installation of theinstrument and any breakage that may be encountered dur- THE POLISHING AND PLATING OF METALS. 1S5 ing its use. As the instruments for platers are strongly en-cased and fixed against the wall, liability to accident is veryslight, and if the instruments are used within the range forwhich they are calibrated, so as not to burn them out, theywill last a lifetime. There is much more to the subject of voltmeters and am-meters than this, of course, but as we only desire to explainthe principles of working we will not enter upon the discus-sion of mathematical, magnetic and mechanical questionsconnected with the manufacture of measuring Fig. 61. Voltmeter showing outer case, index and scale. The voltmeter is about as useful to the plater as is thesteam gauge to the engineer. In case the current falls offfrom any cause, a pressure on the button of the voltmeterwill detect it and trouble may be located and remedied beforeit is necessary to replate a lot of work. As the quan-tity of current passing through a tank bears a definite rela-tion to the pressure of that current, the value of knowingthe pressure instead of guessing at it may be readily seen,particularly, when the plater is running solutions requiringdifferent pressures from the our dynamo, as is the case whenusing silver, copper, nickel and brass solutions all at onetime. 186 THE POLISHING AND PLATING OF METALS. Fig. 61 shows a voltmeter in its case, the terminals forconnections
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectelectro, bookyear1904
