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Ratchet-Bar Egg Beater: Push a Rack, the Floats Spin Both Ways
Harvey Miller, Cincinnati, Ohio · Public domain (expired patent)
YourGrandma

Creato da

YourGrandma

6. ottobre 2026IS
38
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Ratchet-Bar Egg Beater: Push a Rack, the Floats Spin Both Ways

Beating eggs in a closed beater keeps the air out, and a beater bolted to its vessel is slow to empty and clean. Harvey Miller of Cincinnati, Ohio, received US 18,759, dated 1 December 1857, for an egg beater: a frame whose standards clasp an open jar, a bar sliding through slots that gears into a pinion on a vertical spindle, and wire floats on the spindle that turn rapidly one way then the other as the bar is pushed to and fro; lifting the frame frees the jar. This rung works out the turns per stroke, then prints the rack and pinion, builds the frame and floats, and times a beating.
Intermedio
About 5 hours, plus printing

Istruzioni

1

Turns per stroke

Caricamento del notebook Jupyter…
2

The rack and pinion it uses

The embedded blueprint turns a straight push into rotation. Miller pushes the rack by hand and the pinion spins the floats.
3

Read US 18,759

"By this arrangement, if one hand be placed upon the upper bar B to hold the machine steady, while with the other hand upon the handle j, of the ratchet bar g, a reciprocating motion be given to the ratchet bar, then the spindle c, with its floats d, is set in rapid motion, alternately revolving in each direction."
4

Print the rack and pinion

Print the 12-tooth pinion (/uploads/blueprints/ratchet-bar-egg-beater-pinion.stl) and the 20-tooth rack (/uploads/blueprints/ratchet-bar-egg-beater-rack.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls.

Materiali per questo passaggio:

Filamento PETGFilamento PETG1 pezzo

Strumenti necessari:

Stampante 3D a filamento (FDM)Stampante 3D a filamento (FDM)
5

Build the frame

Cut two 170 mm standards and two cross-bars from hardwood. Screw them into a gate that straddles the jar, cut 13 × 11 mm slots across the standards' tops for the rack, and give the feet a curve to fit the jar.

Materiali per questo passaggio:

Blocco di legno duroBlocco di legno duro1 pezzo
Vite da legno #8 x 1"Vite da legno #8 x 1"1 pezzo

Strumenti necessari:

Sega da traforoSega da traforo
Lime (lima a mano)Lime (lima a mano)
Trapano a batteriaTrapano a batteria
Serie di punte da trapanoSerie di punte da trapano
Set di cacciavitiSet di cacciaviti
RighelloRighello
6

Make the spindle and floats

Cut 160 mm of 5 mm steel rod. Bend three loops of stainless wire 45 mm across and 50 mm high, bind their ends to the rod's lower end, and epoxy them. Press the pinion onto the top.

Materiali per questo passaggio:

Tondo di acciaio dolceTondo di acciaio dolce1 pezzo
Filo di acciaio inoxFilo di acciaio inox1 pezzo
Resina epossidica bicomponenteResina epossidica bicomponente1 pezzo

Strumenti necessari:

Seghetto per metalliSeghetto per metalli
Pinze a becchi tondiPinze a becchi tondi
Pinze a becchi piattiPinze a becchi piatti
Occhiali di sicurezza trasparentiOcchiali di sicurezza trasparenti
7

Assemble

Hang the spindle from the lower cross-bar in a 5 mm hole, slide the rack through the slots so its teeth mesh with the pinion, and stand the gate over the bowl.

Materiali per questo passaggio:

Rondella pianaRondella piana1 pezzo

Strumenti necessari:

Trapano a batteriaTrapano a batteria
Serie di punte da trapanoSerie di punte da trapano
8

The patent drawing

US 18,759 drawing sheet, public domain (expired patent).
Passo 8 - Image 1
9

Beat egg whites

Separate two egg whites into the bowl. Pump the rack at about two strokes a second and time how long until they hold stiff peaks.
Passo 9 - Image 1

Materiali per questo passaggio:

UovoUovo2 pezzi

Strumenti necessari:

Grande ciotola da impasto in acciaio inossidabileGrande ciotola da impasto in acciaio inossidabile
CronometroCronometro
10

A rack that jams, slips or a float that hits the bowl

Ratchet-bar egg beater troubleshooting.

Flow

Loading...
11

History and honest limits

**Harvey Miller** of Cincinnati, Ohio, received US 18,759, dated 1 December 1857. His frame and parts were cast iron, the floats iron wire coated with tin, the jar porcelain or tin with no cover, so air has free access; neither shaft nor floats touch the vessel. He did not claim the ratchet bar or revolving beaters alone, only the frame with them in combination with the jar. **Honest limits.** FDM prints hold food in their layer lines, so wash well and replace when worn. Printed PETG gears and a hardwood gate stand in for cast iron. Your times are the result.

Materiali

8

Strumenti richiesti

13

Questo progetto realizza

Thumbnail
Segnaposto

Frullino a manovella

Free

7
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CC0 Pubblico dominio

Questo progetto è rilasciato sotto CC0. Sei libero di copiare, modificare, distribuire e utilizzare quest'opera per qualsiasi scopo, senza chiedere permesso.

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