M. M. Hunting
It is sometimes necessary in making small electrical apparatus to test the work with one or more cells of battery. To avoid the trouble of connecting up several cells to do this work, I constructed a switch similar to the sketch here shown, which permits me to use one to six cells, as the case may require.
The switch is screwed on one corner of my workbench, the battery is on a shelf underneath. Two binding posts on the base of the switch form a convenient way to attach the apparatus to be tested. A battery of any number of cells may be arranged in this way, a point of the switch being added for each cell.