Automatic switch-on lighting device for illuminating bicycle wheel spokes fits in a transparent casing clipped between the bicycle's spokes

摘要

A plastic casing (1) and a double-walled fiber optic light guide (2) form a bicycle spoke lighting device run by 1.4-volt round cell batteries (7). A twilight circuit (4) and an associated light-dependent resistor (5) combine with a specially designed centrifugal switch (6) to light up LEDs (3) if a bicycle wheel turns and appropriate twilight prevails.