Ayrton invented the line divider, a mathematical instrument used for enlarging, reducing, and dividing lines. She patented this invention.

Ayrton's research on the electric arc led to significant improvements in the design and operation of arc lamps, which were widely used for street lighting and other applications. She patented several of these improvements.

During World War I, Ayrton invented the Ayrton fan, also known as the 'Ayrton Flapper,' to dispel poisonous gas from trenches. This invention proved crucial in protecting soldiers from chemical warfare.

Ayrton secured a patent for the Ayrton fan, ensuring her recognition for this life-saving invention.

After the war, Ayrton worked on adapting the Ayrton fan for industrial uses, such as ventilating mines and factories.