Belt-Driven Multiple Egg Beater: One Wheel Beats Three Bowls

"By this motion and by the action of the substance in the vessels the fingers F spread out and a large quantity of the substance is agitated by the same at once, so that it takes but a very short time to reduce a quantity of eggs to froth or to mix a certain quantity of eggs with sugar, and as the fingers are flexible they diverge by being rotated with the disks and they adapt themselves to the shape of the vessel so that they actually sweep through every nook and corner of the vessel."

Print the three-groove driving wheel, three pulleys and three finger disks. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls.

Make a table frame of plywood 330 × 80 mm on four legs 240 mm high. Drill 5 mm holes for the wheel's shaft and three arbors 70 mm apart.

Cut three 200 mm arbors of 5 mm rod. Epoxy a pulley at each top, at the height of its own groove, and a disk at each foot. Push six 30 mm lengths of silicone tube into each disk's holes as fingers.

Fit the wheel on its shaft with a crank screw near its rim. Loop an O-ring from each groove to its pulley, choosing sizes that are taut.

US 23,814 drawing sheet, public domain (expired patent).

Set three bowls under the arbors with one egg white each. Turn the crank about once a second and time each bowl to stiff peaks.

**John L. Nicolai** of Chicago, assignor to himself, S. E. Knott and R. F. Farrell, received US 23,814, dated 26 April 1859. The frame is wood or other material on legs; the disks may be flanged, plain sheet metal, or small cups; the arbors' ends pass through the disks and finish in a flattened fork that also mixes. For larger machines he would put a multiplying gear before the wheel; under steam power it is unnecessary. **Honest limits.** FDM prints hold food in their layer lines, so wash well and replace when worn. O-rings stand in for his endless belts, silicone tube for rubber or gutta-percha fingers. Your times are the result.