Model: T08 Parallel Guide of Roberwal
In this device, the platform on the right is maintained in an approximately horizontal position for small motions of the two coupled horizontal levers. According to the classic mobility criterion (See tutorial) this mechanism of six joints and five links (counting the grounded or fixed link) has a mobility of zero and is technically a structural truss and not a mechanism. However, the symmetry of the links allows small motions that are useful in weighing machines.

Francis Moon 2001-00-00

Reference :

  • Grübler : Getriebelehre (Getriebelehre: Ein Theorie des Zwanglaufes und ebenen Mechanismen. Verlag von Julius Springer, Berli, 1917)

Resources :