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Two-Frame Percussion Dasher Churn: The Upper Frame Strikes the Lower at Every Down Stroke
W. H. Burnham and B. Hibbard, Cortland, New York · Public domain (expired patent)
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7. octobre 2026SE
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Two-Frame Percussion Dasher Churn: The Upper Frame Strikes the Lower at Every Down Stroke

W. H. Burnham and B. Hibbard of Cortland, New York, received US 15,412, dated 29 July 1856, for a dasher of two slatted frames loosely joined: at each down stroke the lower frame meets the bottom and the upper frame is "driven violently in the contact with the lower frame," forcing the cream up between the bars in thin sheets. This rung prints the two frames, key and wedge, builds the churn and lever, and makes butter.
Intermédiaire
About 4 hours, plus printing

Consignes

1

The slack between the frames

Chargement du notebook Jupyter…
2

Slats that close on the cream before it

Clement folds a slatted box; Burnham and Hibbard strike one frame on another.
3

Read US 15,412

"Then when the dasher is forced downward, the lower frame of the dasher will be first arrested by the bottom of the box, which will cause the upper frame of the dasher to be driven violently in the contact with the lower frame thereof and by so doing, will cause the cream which is carried down before it, to be driven with percussive force into the spaces between the bars of the lower frame and thence up in thin sheets."
4

Print the parts

Print the upper frame (/uploads/blueprints/two-frame-percussion-dasher-churn-upper-frame.stl), the lower frame (/uploads/blueprints/two-frame-percussion-dasher-churn-lower-frame.stl) and the key and wedge (/uploads/blueprints/two-frame-percussion-dasher-churn-key-and-wedge.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Matériaux pour cette étape :

Filament PETGFilament PETG1 pièce

Outils nécessaires :

Imprimante 3D à filament (FDM)Imprimante 3D à filament (FDM)
5

The dasher

Glue a 12 mm square hardwood handle into the lower frame and two 6 × 12 mm laths into the upper frame's sockets. Cut a slot 40 mm long down both laths. Set the handle between the laths and push the key through a hole in the handle and through the slots.

Matériaux pour cette étape :

Goujons de bois durGoujons de bois dur1 pièce
Colle à boisColle à bois1 pièce

Outils nécessaires :

Scie égoïneScie égoïne
Perceuse sans filPerceuse sans fil
Jeu de foretsJeu de forets
6

Box and lever

Use a rectangular food-grade container about 210 by 150 mm on a pine platform. Hinge a pine upright at one end of the platform and pin a pine lever to its top; pin the two laths to the lever above the box.

Matériaux pour cette étape :

Contenant de stockage de qualité alimentaireContenant de stockage de qualité alimentaire1 pièce
Planche de pinPlanche de pin1 pièce
Rond en acier douxRond en acier doux1 pièce
Vis à bois #8 x 1"Vis à bois #8 x 1"1 pièce

Outils nécessaires :

Scie égoïneScie égoïne
Perceuse sans filPerceuse sans fil
Jeu de tournevisJeu de tournevis
7

The build in 3D

FreeCAD model of this build: the box cut away to show the two slatted frames, the double handles and key, and the lever on its oscillating upright.
Fichier de designBLENDCC0 - Free
Télécharger le modèle
8

Churn, then gather

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Work the lever steadily; time until the butter comes. Push the wedge into the slots above the handle to hold the frames apart, and work on slowly to gather the butter. Pour off the buttermilk, add cold water, churn a little and pour off again until it runs clear; work in a pinch of salt and weigh the butter.
Étape 8 - Image 1

Matériaux pour cette étape :

Crème liquide entièreCrème liquide entière2000 ml
Gros sel marinGros sel marin1 pièce
EauEau1 pièce

Outils nécessaires :

Thermomètre à sonde à demeureThermomètre à sonde à demeure
ChronomètreChronomètre
Balance de cuisine numériqueBalance de cuisine numérique
Grand cul-de-poule en acier inoxydableGrand cul-de-poule en acier inoxydable
9

Troubleshooting

Two-frame dasher troubleshooting.

Flow

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10

History and honest limits

**W. H. Burnham and B. Hibbard** of Cortland village, Cortland County, New York, US 15,412, 29 July 1856, signed 5 June 1856; the drawing reads "Reciprocating Churn." They claimed the dasher of two independent frames combined with each other and the lever. A container, pine and printed parts stand in for theirs. FDM prints hold food in their layer lines, so wash well and replace when worn.

Matériaux

10

Outils requis

9

Fichiers de conception

1

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CC0 Domaine public

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