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Double-Acting Swing Dash Churn: Two Dasher Strokes From Every Swing
Martin

Creato da

Martin

6. ottobre 2026NO
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Double-Acting Swing Dash Churn: Two Dasher Strokes From Every Swing

The Davises doubled the work a swinging churn gets from each swing. William F. Davis and Nathan Davis of Castleton, Vermont, received US 9,416, dated 23 November 1852, for "The Oscillating Double-Acting Dash-Churn": a tank hung in a pendulum frame between standards three and a half feet long; a connecting board pinned to one pendulum bar, slotted to slide on the rock shaft, carrying two pins that enter two opposite notches in a wheel fixed to the rock shaft; and a lever from the rock shaft to a hollow dash stick with a valve "for the purpose of preventing a vacuum underneath the dash." This rung works out the strokes, then prints the notched wheel and connecting board, builds the frame and swing, and makes butter.
Avanzato
About 6 hours, plus printing

Istruzioni

1

Strokes per minute

Caricamento del notebook Jupyter…
2

The swing churn it doubles

The embedded blueprint gives one dasher stroke per swing through a bent lever. The Davises' notched wheel and two-pinned board give two.
3

Read US 9,416

"As the swing moves from the center toward the left and back the upper pin leaves the upper notch and the lower pin enters its respective notch, producing substantially the same result as when the upper pin entered the upper notch and passed toward the right and back. Thus we produce two complete motions of the dash from one full oscillation of the pendulum bars."
4

Print the parts

Print the notched wheel (/uploads/blueprints/double-acting-swing-dash-churn-notched-wheel.stl) and the connecting board with its slot and two pins (/uploads/blueprints/double-acting-swing-dash-churn-connecting-board.stl). Reuse the dasher and valve plug from the pendulum swing dash churn if you have them. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Materiali per questo passaggio:

Filamento PETGFilamento PETG1 pezzo

Strumenti necessari:

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

Frame and swing

Build two pine A-frames about 520 mm tall joined at the top, with diagonal cross pieces carrying the rock shaft, and hang a swing of two pine bars and a plywood board from a rod at the top. Stand a straight-sided food-grade container on the board as the tank.

Materiali per questo passaggio:

Tavola di pinoTavola di pino1 pezzo
Pannello di compensatoPannello di compensato1 pezzo
Tondo di acciaio dolceTondo di acciaio dolce1 pezzo
Contenitore di conservazione per uso alimentareContenitore di conservazione per uso alimentare1 pezzo
Vite da legno #8 x 1"Vite da legno #8 x 1"1 pezzo

Strumenti necessari:

Sega a manoSega a mano
Trapano a batteriaTrapano a batteria
Serie di punte da trapanoSerie di punte da trapano
Set di cacciavitiSet di cacciaviti
6

Wheel, board, lever and dash

Fix the notched wheel on a 12 mm steel rock shaft. Pin the connecting board to one swing bar, its slot over the shaft, so its pins meet the notches. Fix a pine lever to the rock shaft and pin its end to a hollow 18 mm food-grade tube dash stick with a leather flap valve near its top and a perforated dasher at its foot.

Materiali per questo passaggio:

Tondo di acciaio dolceTondo di acciaio dolce1 pezzo
Tavola di pinoTavola di pino1 pezzo
Tubo in PVCTubo in PVC1 pezzo
Striscia di pelleStriscia di pelle1 pezzo
Viti da metalloViti da metallo1 pezzo
Dado esagonaleDado esagonale1 pezzo
Resina epossidica bicomponenteResina epossidica bicomponente1 pezzo

Strumenti necessari:

Seghetto per metalliSeghetto per metalli
Trapano a batteriaTrapano a batteria
Serie di punte da trapanoSerie di punte da trapano
Chiave regolabile a rullinoChiave regolabile a rullino
7

The patent drawing

US 9,416, drawing sheet, public domain (expired patent).
Passo 7 - Image 1
8

Swing and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Swing the tank steadily; the dasher strokes twice each full swing. 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.

Materiali per questo passaggio:

Panna da montarePanna da montare2000 ml
Sale marino grossoSale marino grosso1 pezzo
AcquaAcqua1 pezzo

Strumenti necessari:

Termometro a sonda permanenteTermometro a sonda permanente
CronometroCronometro
Bilancia digitale da cucinaBilancia digitale da cucina
Grande ciotola da impasto in acciaio inossidabileGrande ciotola da impasto in acciaio inossidabile
9

Pins that miss, a dash that sticks

Double-acting swing dash troubleshooting.

Flow

Loading...
10

History and honest limits

**William F. Davis and Nathan Davis** of Castleton, Rutland County, Vermont, received US 9,416, dated 23 November 1852. Their standards were 2 by 1 inches, 3½ feet long, spread three feet at the bottom, pairs 15 inches apart; the swing board was 13 by 14 inches; the dash stick's hole was ⅝ inch. They claimed the combination of the swing, slotted board, wheel, rock shaft and lever producing two motions of the dash from one oscillation. **Honest limits.** A smaller frame, a container and printed parts stand in for theirs; their swing length is estimated. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Materiali

14

Strumenti richiesti

11

Questo progetto realizza

Thumbnail
Segnaposto

Zangola

Free

19
0

Blueprint correlati

Questi blueprint condividono conoscenze — tecniche, materiali o principi

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di WoodyNO

Lavorazione del legno

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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.

Supporta il Maker acquistando prodotti tramite il suo progetto dove guadagna una Commissione Maker stabilita dai venditori, oppure crea una nuova iterazione di questo progetto e includilo come collegamento nel tuo progetto per condividere i ricavi.

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