Fig. 1,092.—The Exide storage cell. The positive and negative plates are separated by thin sheets of perforated hard rubber, placed on both sides of each positive plate. The electrolyte and plates are contained in a hard rubber jar.
Fig. 1,093.—An Exide battery of five cells. The box which holds the cells is usually made of oak, properly reinforced, with the wood treated to render it acid proof. The terminals as shown, consist of metal castings attached to the side of the box and plainly marked.
Connection for Charging.—The dynamo cable connections may be made either before or after filling the cells. In making these connections great care should be taken to be sure that the positive terminal of the battery is connected to the positive lead of the dynamo, and that the negative terminal of the battery is connected to the negative lead of the dynamo. In order to insure that the reverse connections are not made accidentally, the dynamo leads should be tested by a pole tester, and the positive and negative poles marked red and black respectively.
Figs. 1,094 to 1,109.—Parts of the "Exide" sparking battery. A, positive plate; B, negative plate; C, wood separator; D, positive strap; E, negative strap; F, terminal lug; H, connector; I, terminal bolt connector, stud, thumb nut and hexagonal nut; J, copper washer for bolt connector; L, hard rubber jar; M, hard rubber cover; N, hard rubber cylinder vent; O, vent plug for cylinder vent; R, wood case; S, strap handle; T, fitting for strap handle. The "Exide" sparking battery is also adapted for electric lighting of automobiles, for head lights, tail lights, side and interior lights.
The polarity of the dynamo wires being determined, they may be joined to the proper terminals by means of suitable clamps or by solder.