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The Boy Mechanic: Volume 1 - 700 Things for Boys to Do by Popular Mechanics Co.
page 22 of 996 (02%)
by David Brown, Kansas City, Mo.



** Fish Signal for Fishing through Ice [10]

Watching a fish line set in a hole cut in the ice on a cold day is
very disagreeable, and the usual method is to

[Illustration: Bell and Battery in a Box]

have some kind of a device to signal the fisherman when a fish is
hooked. The "tip ups" and the "jumping jacks" serve their purpose
nicely, but a more elaborate device is the electric signal. A
complete electric outfit can be installed in a box and carried as
conveniently as tackle.

An ordinary electric bell, A, Fig. 1, having a gong 2-1/2 in. in
diameter, and a pocket battery, B are mounted on the bottom of the
box. The electric connection to the bell is plainly shown. Two
strips of brass, C, are mounted on the outside of the box. The
brass strips are shaped in such a way as to form a circuit when
the ends are pulled together. The box is opened and set on the ice
near the fishing hole. The fish line is hung over a round stick
placed across the hole and then tied to the inside strip of brass.
When the fish is hooked the line will pull the brass points into
contact and close the electric circuit.



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