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Cord-Wound Staff Churn Drive: A Swinging Lever Twists the Dash To and Fro by Cords
Lucius Leavenworth, Trumansburg, New York · Public domain (expired patent)
Hoop

Créé par

Hoop

7. octobre 2026GB
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Cord-Wound Staff Churn Drive: A Swinging Lever Twists the Dash To and Fro by Cords

Lucius Leavenworth of Trumansburg, New York, received US 14,458, dated 18 March 1856, for "Machinery for Operating Churns": cords from a pulley, worked by a swinging lever, wind and unwind on the dash staff and turn it to and fro. This rung prints the pulley, lever head, frame and dash, builds the drive on a churn and makes butter.
Intermédiaire
About 4 hours, plus printing

Consignes

1

From a swing to a twist

Chargement du notebook Jupyter…
2

A turned staff before it

Boyers turns his shaft with a crank; Leavenworth twists his with cords.
3

Read US 14,458

"By taking hold of the handle of the lever, and moving it with a reciprocating motion, the cords attached to arc of the lever, will alternately wind and unwind on the pulley F, causing it to partially revolve in the direction of the lever, thus causing the cords E, E, to move the staff with a reciprocating motion."
4

Print the parts

Print the pulley (/uploads/blueprints/cord-wound-staff-churn-drive-pulley.stl), the lever head (/uploads/blueprints/cord-wound-staff-churn-drive-lever-arc.stl), the frame (/uploads/blueprints/cord-wound-staff-churn-drive-frame.stl) and the dash (/uploads/blueprints/cord-wound-staff-churn-drive-dash.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

Post, frame and pulley

Stand a pine post beside a tapered food-grade bucket. Clamp the frame on its top, with a pine arm out over the bucket's centre carrying the pulley on a 10 mm rod. Pin the lever head on a 10 mm rod lower in the frame and glue a 12 mm dowel handle into it.

Matériaux pour cette étape :

Planche de pinPlanche de pin1 pièce
Seau de 20 litresSeau de 20 litres1 pièce
Rond en acier douxRond en acier doux1 pièce
Goujons de bois durGoujons de bois dur1 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 foretsJeu de forets
Jeu de tournevisJeu de tournevis
6

Staff, dash and cords

Push the dash onto a 16 mm hardwood staff and stand it in the bucket, its top in the pulley's large groove. Tie a cord from each pulley groove, wind it a few turns round the staff, the two the same way, and fix it to a pin in the staff. Tie cord H round the pulley's small hub in opposite directions to the two ends of the lever's arc.

Matériaux pour cette étape :

Goujons de bois durGoujons de bois dur1 pièce
ParacordeParacorde1 pièce
Colle à boisColle à bois1 pièce

Outils nécessaires :

Perceuse sans filPerceuse sans fil
Jeu de foretsJeu de forets
7

The patent drawing

US 14,458 drawing sheet, public domain (expired patent).
Étape 7 - Image 1
8

Churn

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 3 litres. Swing the lever steadily to and fro; time until the butter comes. 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.

Matériaux pour cette étape :

Crème liquide entièreCrème liquide entière3000 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

Cord-wound drive troubleshooting.

Flow

Loading...
10

History and honest limits

**Lucius Leavenworth** of Trumansburg, Tompkins County, New York, US 14,458, 18 March 1856. The lever's wrist pin could take "a connecting rod from a rocking chain or other power." He claimed the cords attached to the pulley and wound on the staff to give a rotary motion. A bucket, pine and printed parts stand in for his. FDM prints hold food in their layer lines, so wash well and replace when worn.

Matériaux

11

Outils requis

9

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CC0 Domaine public

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