Circular eccentric 1 rotates about axis A. Link 3 has collar b encircling eccentric 1. Link 3 is connected by turning pairs D to links 4 and 5. Link 5 is connected by turning pair E to crusher jaw 2 which turns about fixed axis C. When eccentric 1 rotates about axis A, jaw 2 oscillates and thereby crushes the material dumped into space a between the jaws.
$897$LW,FD$