. Electrical world. olumbus, Ohio, a patent on a storage battery grid which meritsspecial attention on account of the unusual design. The accompany-ing illustration, Fig. i, will serve in a way to convey the idea em-bodied in the construction. The cut shows a section of the platewith one side sawed away, in order that the cross-section may bemade clear. It would seem that it is practically impossible for thepaste or active material to wear away or be forced out of a grid ofa type similar to that in the illustration, as the T-shaped cross-section securely holds the paste in place. The paste is
. Electrical world. olumbus, Ohio, a patent on a storage battery grid which meritsspecial attention on account of the unusual design. The accompany-ing illustration, Fig. i, will serve in a way to convey the idea em-bodied in the construction. The cut shows a section of the platewith one side sawed away, in order that the cross-section may bemade clear. It would seem that it is practically impossible for thepaste or active material to wear away or be forced out of a grid ofa type similar to that in the illustration, as the T-shaped cross-section securely holds the paste in place. The paste is forced inwhile in a plastic condition and afterwards properly hardened andformed. The grid is cast all in one piece in a two-part metal mould. Theretaining strips are cast as thin as practicable, the usual thicknessbeing .06 of an inch. This thickness is greater than is required togive the grid the necessary rigidity, and the cast grids are, therefore,passed under a broad milling cutter, which removes .03 of an inch. FIG. I.—BATTERY GRID. duced to .26 of an inch, the weight of the grid being decreasedabout one-third. For automobile batteries the grids are cast .25of an inch thick and milled down to . ig of an inch. As the millingcutter passes over the surface of the plate it leaves narrow burrsor flanges at the edges of the retaining strips and webs. Theseflanges are of service in retaining the active material in the grid. AH grids are stiffened by several vertical ribs extending from thetop to the bottom of the plate. The distribution of the metal of thegrid is such as to give it great rigidity,with the least possible weight. Thespace available for active materialamounts to from 50 to 70 per cent, ofthe total volume of the electrode, andthe weight of active material, in port-able batteries, may be 50 per cent, ofthe total weight of the electrode. Theexposed surface of the active materialis reduced to a minimum of about 40per cent, of the total surface of theelectrode, and th
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
