Interference No. 103,036
thereto a pair of wires (6 and 7), the adjacent ends of which
overlap and do not touch each other, leaving a space (8) between
the wires, into which, an indicator, which will change color when
an electric current is passed therethrough, is impregnated and
dried. The preferred indicator is phenolphthalein. The wires (6
and 7) have clips (9 and 10) attached thereto for engagement with
the binding posts (11 and 12) of the cell (13).
To test the strength of the battery, the user must
attach both clips to the binding posts of the cell and moisten
the indicator region where the phenolphthalein is present. Then,
current will pass through the moistened spot and cause the
indicator to change color. The battery condition is determined
by comparing the color at the moistened section with the colors
on color chart (15) printed on carrier (6).
The second embodiment is depicted in Figures 3 and 4 as
follows:
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Last modified: November 3, 2007