, etc., are on
hand, they can be suitably mounted so as to drive the generator.

CHARGING BENCH

[Fig. 65. Charging Bench with D.P.D.T. Switch for Each Battery]

Figures 47 and 65 show charging benches in operation. Note that they
are made of heavy stock, which is of course necessary on account of
the weight of the batteries. The top of the charging bench should be
low, to eliminate as much lifting of batteries as possible. Figure 66
is a working drawing of the bench illustrated in Figure 65. Note the
elevated shelf extending down the center. This is convenient for
holding water bottle, acid pitcher, hydrometer. Note also the strip
"D" on this shelf, with the voltmeter hung from an iron bracket. With
this arrangement the meter may be moved to any battery for voltage,
cadmium, and high rate discharge readings. It also has the advantage
of keeping the volt meter in a convenient and safe place, where it is
not liable to have acid spilled on it, or to be damaged by rough
handling. In building the bench shown in Figure 66, give each part a
coat of asphaltum paint before assembling. After assembling the bench
give it two more coats of asphaltum paint.

[Fig. 66 Working drawing of charging bench shown in Fig. 65]

Figures 67, 68, 69 and 70 show the working plans for other charging
benches or tables. The repairman should choose the one which he
considers most suitable for his shop. In wiring these benches, the
elevated shelf shown in Figure 66 may be added and the double pole,
double throw switches used. Instead of these switches, the jumpers
shown on the benches illustrated in Figure 47 may be used. If this is
done, the elevated shelf should also be installed, as it is a great
convenience for the hydrometer, voltmeter, and so on, as already
described.

As for the hydrometer, thermometer, etc., which were listed on page 96
as essential accessories of a charging bench, the Exide vehicle type
hydrometer is a most excellent one for general use. This hydrometer
has a round bulb and a straight barrel which has projections on the
float to keep the hydrometer in an upright position when taking
gravity readings. The special thermometer is shown in Figure 37. A
good voltmeter is shown in Figure 121. This voltmeter has a 2.5 and a
25 volt scale, which makes it convenient for battery work. It also
gives readings of a .2 and 2.0 to the left of the zero, and special
scale markings to facilitate the making of Cadmium tests as de