Fig. 12. Testing and Maturing Set
The details of the device are given in [Fig. 13]. The base measuring 20 by 12 inches has mounted at the rear center a wooden box containing a 75 Watt, type C, Mazda lamp. Where lighting current cannot be obtained a 12 volt automobile headlight bulb may be used to illuminate the cell. The lamp in either case is connected to the switch mounted just to the left of the box.
The front of the lamp housing has a hole measuring 1 by ¾ inches cut in it on a level with the lamp filament. Two clips cut from spring brass of the shape shown in the detail drawing are mounted on the front of the box in such a position that when the posts on the back of the cell are slipped into the holes in the ends of the strips the window of the cell will be opposite the opening in the lamp housing. Connection is made to the cell by means of these clips.
Fig. 13. Layout and Wiring Diagram of Testing and Maturing Set
At the extreme left of the base a double pole fuse switch is mounted to control the alternating current to treat the cell. Instead of fuses two tubular incandescent lamps are screwed into the receptacles on the switch to limit the A. C. to a value that will not endanger the cell by overheating it. Should lighting current not be available use can be made of a buzzer and telephone induction coil connected to a dry cell as shown in [Fig. 14] to furnish current for treating the cell.
Fig. 14. Connections for Buzzer and Induction Coil to Produce Alternating Current