Stool

Muse­ums and archives

Until 1933 mech­a­nism was stored in the Sci­ence Museum (Lon­don, UK); № 1877-440.


Descrip­tion

Stool with top mov­ing par­al­lel to it's bot­tom.

The only known image of this mech­a­nism was found in the book "How to draw a straight line. A lec­ture on link­ages." by A. B. Kempe.


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Schema
Название