The Bricard linkages 121
represented by a hollow circle. When the links are extended, which will be
the case when the linkage is connected with its neighbours, the hinges may
appear in the middle of a link. In this circumstance the hinge is represented
by a dot. A pair of links connected by a hinge in the middle, Figure 6.6(b),
(a)
(b)
(c)
Figure 6.5 Motion sequence of a threefold-symmetric Bricard linkage with
α = π /3. The first image corresponds to the compact folding whereas
the last is the maximum expansion.
(a)
(b)
Figure 6.6 (a) Schematic diagram of the threefold-symmetric Bricard linkage
and (b) a pair of links connected by a hinge in the middle.
represented by a hollow circle. When the links are extended, which will be
the case when the linkage is connected with its neighbours, the hinges may
appear in the middle of a link. In this circumstance the hinge is represented
by a dot. A pair of links connected by a hinge in the middle, Figure 6.6(b),
(a)
(b)
(c)
Figure 6.5 Motion sequence of a threefold-symmetric Bricard linkage with
α = π /3. The first image corresponds to the compact folding whereas
the last is the maximum expansion.
(a)
(b)
Figure 6.6 (a) Schematic diagram of the threefold-symmetric Bricard linkage
and (b) a pair of links connected by a hinge in the middle.