Kurt Schiffler

Kurt Schiffler (6 April 1896 - 25 February 1986) was a German engineer, entrepreneur, inventor and amateur geometer.

[1] In 1925 he founded his own company called Dusyma, which produced educational toys and musical instrument made of wood.

Schiffler collaborated with Erika Hoffman, a professor of pedagogics and expert on Friedrich Froebel, and the Kindergarten teacher Christine Uhl, who designed one of the construction kits produced by Dusyma.

In 1978 he asked his daughter Lulu Schiffler-Betz to join Dusyma to prepare her for leading the company later on.

Schiffler published his discovery in 1985 in the form of a problem in the Canadian journal Crux Mathematicorum.

building block with cogs invented by Schiffler
Triangle ABC is partitioned into triangles ABI,BCI, ACI and the Euler lines e 0 ,e 1 ,e 2 ,e 3 coincide in the Schiffler point S