30 Fundamental concepts
f The doubly collapsible octahedral case
;
(2.35)
.
Motion sequence of the cases (a) and (b) Bricard linkages are shown in
Figures 2.20 and 2.21, respectively. Figure 2.22 shows two models of cases
(c) and (d).
Figure 2.20 Motion sequence of a line-symmetric Bricard linkage.
Figure 2.21 Motion sequence of a plane-symmetric Bricard linkage.