other means known in the art the pin is fit through the apertures 143 of the innermost inside link 142 in another embodiment of the present invention shown generally at 150 in fig4 a a retention bracket 152 interconnects two chain assemblies 154 and 156 the chain assemblies 154 156 which are shown as silent chains in fig4 a 4d may be alternatively roller chains or other types of chain generally known in the art the chain assemblies 154 and 156 include guide links 174 that are located along the outside of the chains and interleaved sets of inside links 172 the chain assemblies 154 and 156 are phased with respect to one another by approximately one half pitch as shown in the top view of fig4 b and are seated in phased sprocket portions 168 and 170 as shown in the schematic view of fig4 c as shown in fig4 d the inside links 172 are inverted tooth links that include an upper edge 176 depending teeth 178 that extend downward therefrom and apertures 173 the teeth 178 of the inside links 172 engage the sprocket teeth not shown of the sprocket portion 168 and 170 the guide links 174 include apertures 171 and do not engage the sprocket teeth as shown in fig4 e the retention bracket 152.