... circular arc 1-2 with center at 02, arc 34 with center at 03 , arc 4-5 with center at 01 , arc 5-6 with center at 04 , arc 7- 1 with center at 01 , and the straight lines 2-3 and 6 -7 The method ... links II and III come into toggle Sclater Chapter 5/3/01 12:33 PM Page 213 SIXTEEN LATCH, TOGGLE, AND TRIGGER DEVICES Diagrams of basic latching and quick-release mechanisms Fig Cam-guided latch ... turned with radii r1 , r3 , and r4 One such piece is shown in Fig The templates have hubs that fit into the drilled holes at 01 , 03 , and 04 Next the arcs 7- 1 , 3-4 , and 5-6 are filed with the hardened...