#1593: RungRinger

Today’s invention is a safety device for ladders.

The ladder contains an embedded smartphone, incorporating accelerometers. This is switched on when a sensor in the first rung detects the weight of a foot.

If, in the next second or two, the ladder moves, or remains at a dangerously non-vertical angle, the phone issues an alarm (and may automatically contact the hire company -or the homeowner).

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