Elisha Otis demonstrated a safety brake in 1854 for this machine that carries people between floors.

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TechnologyOne small aha

Your new ahaElevator

Otis is associated with a safety mechanism that helped stop an elevator if its lifting cable failed. Source: Elisha Otis ↗

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06This electrical communication device sent coded messages over wires, famously using Morse code.IDENTIFY
The Telegraph
Samuel Morse's telegraph enabled near-instant long-distance messages using the code that bears his name.
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07Volta's pile was an early example of this device that supplies electric current through chemical reactions.IDENTIFY
The Battery
Alessandro Volta's voltaic pile provided the first reliable continuous electric current.
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08George de Mestral developed this branded hook-and-loop fastener after studying burrs caught in fur.RECALL
Velcro
George de Mestral invented Velcro after studying burrs that had stuck to his dog's fur on a walk.
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