A hand-crank newsreel, one line a turn. A desktop curiosity for anyone who enjoys watching a mechanism think: crank the handle and a Geneva indexer, ratchet, and geared air-paddle governor click a paper strip forward exactly one line per turn behind the viewing window, rewarding slow, deliberate cranking over idle fidgeting.
One crank, one line, one direction. Turning the crank spins a flywheel geared to a six-blade air paddle that limits speed, while the same shaft drives a six-slot Geneva cross through exactly one sixth of a turn. That indexes the capstan, walking the paper strip forward one line; a ratchet-toothed clutch gear and leaf-spring pawl keep the crank turning only one way.
Fourteen printed parts, one mechanism. The reader builds from a green L-frame and right gear plate carrying the full train: crank spindle, Geneva driver and cross, leaf-spring pawl, governor rotor, capstan, clutch gear and cap, supply and takeup bobbins, pinch yoke, and gate bezel, fourteen parts in all, pressed onto printed shafts and posts.
A 2.2 in strip, one line at a time. A 2.2-inch paper strip runs from the supply bobbin over a ribbed capstan, held snug by a sprung pinch yoke, and advances 0.47 inches into the gate bezel's viewing slot with every crank turn. A friction-clutched takeup bobbin winds the strip loosely, so nothing binds or tears as it feeds through.
Comments