. Electrical world. is then locked to the hanger, as described above, sothat it bears against the other flat surface of the oxide plate, whichis held firmly between the two spring clamps. The advantages possessed by this .form of construction are thatwhen the battery needs to be recharged the exhausted oxide of copperplate can be removed from the hanger and a new one substituted withthe least possible loss of time, and w ithout soiling the fingers. Thewide surfaces of contact presented by the perforated spring clampsrender it unnecessary for any cleaning or sandpapering of these partswhen rech
. Electrical world. is then locked to the hanger, as described above, sothat it bears against the other flat surface of the oxide plate, whichis held firmly between the two spring clamps. The advantages possessed by this .form of construction are thatwhen the battery needs to be recharged the exhausted oxide of copperplate can be removed from the hanger and a new one substituted withthe least possible loss of time, and w ithout soiling the fingers. Thewide surfaces of contact presented by the perforated spring clampsrender it unnecessary for any cleaning or sandpapering of these partswhen recharging the battery. The positive electrode consists in all cases of two flat plates, com-posed of an alloy of zinc and mercury, which are suspended fromthe cover. In some models these fiat zinc plates are cast on an in-verted U-shaped hanger, having a threaded extension which passesthrough a hole in the cover, to which it is clamped by a suitable other models (as shown in the illustration) the two zinc plates.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883