New York · Brown, Coombs & Co. · 1868
Embracing all those which are most important in Dynamics, Hydraulics, Hydrostatics, Pneumatics, Steam Engines, Mill and other Gearing, Presses, Horology, and Miscellaneous Machinery.
By Henry T. Brown
Real machines, not animations.
Every part moves by physics. Only the input is driven; belts grip by friction, gears turn by their teeth, and every ratio on these pages is measured from the simulation, never scripted. Change the friction, the load or a pulley and the machine answers. Take the friction away and it stops.
Each model has exactly one motor, on the shaft Brown marks as the driver. Nothing else is told how to move: no keyframes, no recorded trajectories, and the compiler refuses any ratio or coupling between shafts. Other 3D editions animate Brown's drawings; this one simulates them.
Belts are closed chains of elastic links held on by tension and friction. Gears are involute teeth that collide. Take the friction away and the driven pulley stops.
MuJoCo steps the physics, in Python for the tests and in WebAssembly in your browser. Each movement's speed ratios, reversals and slack are measured against Brown before it is published, and the status ledger says plainly what is built and what is not.
All five hundred and seven, in Brown's order. The inked ones run; the rest link to Brown's text and figure. The full status ledger lists each one's mechanism and measurements.