Cage gear Gear
cage gear in pantigo windmill, long island (with driving gearwheel disengaged)
a cage gear, called lantern gear or lantern pinion has cylindrical rods teeth, parallel axle , arranged in circle around it, bars on round bird cage or lantern. assembly held disks @ each end, tooth rods , axle set. cage gears more efficient solid pinions, , dirt can fall through rods rather becoming trapped , increasing wear. can constructed simple tools teeth not formed cutting or milling, rather drilling holes , inserting rods.
sometimes used in clocks, cage gear should driven gearwheel, not used driver. cage gear not favoured conservative clock makers. became popular in turret clocks dirty working conditions commonplace. domestic american clock movements used them.
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