Recent Blogs
Two Ratchet Arcs: Brown Movement 83 and Ideal Angular Advance
Explore opposed ratchet arcs on a common rockshaft. Compare ideal advance and average speed from an assumed effective sweep; tooth engagement and torque are not...
Treadles and Chain to Ratchet Wheel: Angular Pitch Comparison
Compare an entered rocker sweep with uniform ratchet tooth pitch. Count complete pitch intervals and remaining angle without predicting pawl engagement under load.
Star-wheel Ratchet Mechanism: How It Works, Parts, Diagram, and Indexing Formula Explained
Star-wheel Ratchet mechanism explained — how the spring-loaded detent indexes a pointed rotor one step per stroke, with formulas, real machine-shop examples, and design rules.
Quadrant Catch Hand-Gear Form B: Ideal Reduction Ledger
Quadrant catch hand-gear form B explained — how the spring-loaded pawl locks elevation arcs on field guns and survey theodolites, with formulas and a worked...
Click-driven Cog-wheel Feed Mechanism: How It Works, Parts, Formula and Indexing Uses Explained
Animate an oscillating carrier and click feed. Calculate indexed angle from cog tooth count, teeth advanced per stroke and batch strokes, with a separate holding...
Crab Winch Mechanism Explained: How a Double-Reduction Hand Winch Works, Parts and Uses
Explore a double-reduction hand winch. Calculate both gear-stage ratios and drum speed, and see why hand-force advantage also depends on handle and drum radii.
Colt Revolving Cylinder: Historical Mechanism Illustration
Explore a schematic revolving-cylinder arrangement in historical context. The illustration does not provide firearm timing, tolerances or construction specifications.
Combined Ratchet and Hand-feed Gear: Worm-wheel Nut and Hand-screw Adjustment
Explore fine automatic feed through a ratchet and worm-wheel nut, then compare direct hand-screw adjustment. Calculate feed per cycle and average travel rate.