For months, they spent hours every day researching and studying, examining the intricate mechanisms of clocks and other mechanical devices available around them.
Since it had never been done before, the siblings had to figure out every single detail from key layout, typebars, ribbon, carriage and escapement and shift key.
It was a daunting task, to say the least. They had to experiment with different materials, shapes, and sizes, tinkering with gears and springs, and trying to figure out the optimal arrangement for their typing machine.
Because each of the components had a unique shape, everything single of them need to be ordered and custom-made. Had it not for them being born into a pretty well-off merchant family, the process of procuring parts may take years instead of months.