Movement No. 133 demonstrates a simple hand-operated press mechanism driven through a pinion and toothed sector linkage. A hand-crank turns the pinion shaft, causing the pinion to rotate. The pinion meshes with a toothed sector — a partial arc gear — causing it to swing through an arc about its fixed pivot. A connecting rod links the toothed sector to the platen of the press. As the sector swings, it pushes and pulls the connecting rod, driving the platen downward onto the workpiece to apply pressing force, then lifting it back up on the return stroke. This compact arrangement converts the continuous rotary motion of the hand-crank into a controlled reciprocating press action with good mechanical advantage. The toothed sector amplifies the torque from the pinion and transmits it smoothly to the platen via the connecting rod, making this mechanism well suited for small hand-operated printing presses, embossing tools, and light stamping applications.
133. A simple press motion is given through the hand-crank on the pinion-shaft; the pinion communicating motion to the toothed sector, which acts upon the platen, by means of the rod which connects it therewith.