Movement No. 125 is a more complex modification of Movement No. 122, again using two spur-gears with crank-wrists to produce a variable alternating traverse of horizontal bars — but with additional linkages that create a more intricate motion profile. As with No. 122, the two meshing spur-gears rotate in opposite directions at equal speed, and each carries a crank-wrist pin connected through horizontal links. However, the central pins of the horizontal links in this mechanism are constrained to move along a defined path — likely vertical axes or arcs — adding a second stage of motion transformation. This compound linkage arrangement produces a more complex, non-sinusoidal traversing output, allowing for customized motion profiles with varying dwell times or acceleration characteristics. Such complex traverse motions find application in specialized weaving machinery, pattern-generating mechanisms, and advanced feed systems requiring precise, non-uniform linear motion.
125. A modification of the motion shown in 122, but of a more complex character.