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Pendulum Swing Dash Churn: Rock the Hanging Tank, the Dasher Works Itself
Ithiel S. Richardson, Boston, Massachusetts · Public domain (expired patent)
Martin

Yenziwe ngu-

Martin

6. uMfumfu 2026NO
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Pendulum Swing Dash Churn: Rock the Hanging Tank, the Dasher Works Itself

Richardson made the swing of the churn drive the dasher. Ithiel S. Richardson of Boston, Massachusetts, received US 8,146, dated 10 June 1851, for what he called the "Oscillating Perpendicular Dash-Churn": a tank hung in a swing between standards four feet long, joined at the top and spread three and a half feet at the bottom; a connecting rod from the swing rocks a bent lever on a rock shaft that works the dash stick up and down. The dash stick is hollow over a staff on a perforated false bottom, with a valved plug to let air in, so no vacuum slows the dasher; afterward the false bottom lifts out as a strainer, "bringing with it the butter." This rung works out the swing's pace, then prints the dasher, false bottom and valve plug, builds the frame and swing, and makes butter.
Osezingeni eliphezulu
About 6 hours, plus printing

Imiyalelo

1

The swing's pace

Ilayisha incwadi ye-Jupyter…
2

A swinging churn that works its dashers before it

The embedded blueprint swings a platform whose toothed pieces work two dashers. Richardson hangs the tank in a pendulum frame and works one dasher through a bent lever.
3

Read US 8,146

"The hand holding the rod L communicates a backward and forward motion to the swing, which motion the swing communicates from one of its upright parts, through the connecting rod K to the arm J of the bent lever G H J, which bent lever, from its arm G, gives the motion to the dash stick F."
4

Print the parts

Print the perforated dasher with its socket, the perforated false bottom with its staff socket and the valve plug. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Izinto zokwakha zalesi sinyathelo:

Ifilamenti ye-PETGIfilamenti ye-PETG1 ucezu

Amathuluzi adingekayo:

Iphrinta ye-3D yentambo (i-FDM)Iphrinta ye-3D yentambo (i-FDM)
5

Print the dasher

The dasher, printed as step 4 describes.
Ifayela LomklamoSTLCC0 - Free
Landa imodeli
6

Print the false bottom

The false bottom, printed as step 4 describes.
Ifayela LomklamoSTLCC0 - Free
Landa imodeli
7

Print the valve plug

The valve plug, printed as step 4 describes.
Ifayela LomklamoSTLCC0 - Free
Landa imodeli
8

Frame and swing

Build two A-frames of pine about 800 mm tall and join their tops with a 12 mm steel rod. Hang a swing from it: two pine uprights and a plywood board at their feet. Stand a straight-sided food-grade container on the board as the tank, strapped to the uprights.

Izinto zokwakha zalesi sinyathelo:

Ipulangwe lomphayiniIpulangwe lomphayini1 ucezu
Ubhamu Oluyindilinga Lwensimbi EthambileUbhamu Oluyindilinga Lwensimbi Ethambile1 ucezu
Ishidi le-plywoodIshidi le-plywood1 ucezu
Isitsha sokugcina sezinga lokudlaIsitsha sokugcina sezinga lokudla1 ucezu
Isikulufo sokhuni #8 x 1"Isikulufo sokhuni #8 x 1"1 ucezu
Ucezu lwesikhumbaUcezu lwesikhumba1 ucezu

Amathuluzi adingekayo:

Isaha SesandlaIsaha Sesandla
Ibhola ElingenantamboIbhola Elingenantambo
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isethi yezikulufudrayivaIsethi yezikulufudrayiva
Ama-clampAma-clamp
9

Dasher, lever and rod

Bore a length of 18 mm food-grade tube as the hollow dash stick and fit the valve plug through its side near the top, with a small leather flap inside so air enters but cannot leave that way. Glue the dasher on its foot. Set the false bottom in the tank with a 12 mm dowel staff rising inside the dash stick, and hold it with a wedge. Pivot a pine bent lever on a rock shaft across the frame's top, couple its long arm to the dash stick and its short arm by a pine rod to one swing upright.

Izinto zokwakha zalesi sinyathelo:

Ipayipi Le-PVCIpayipi Le-PVC1 ucezu
Ucezu lwesikhumbaUcezu lwesikhumba1 ucezu
Izikhonkwane zokhuni oluqinileIzikhonkwane zokhuni oluqinile1 ucezu
Ipulangwe lomphayiniIpulangwe lomphayini1 ucezu
Izikulufu zomshiniIzikulufu zomshini1 ucezu
Inathi Yezinhlangothi EziyisithuphaInathi Yezinhlangothi Eziyisithupha1 ucezu
I-epoxy Yezingxenye EzimbiliI-epoxy Yezingxenye Ezimbili1 ucezu

Amathuluzi adingekayo:

Isaha SensimbiIsaha Sensimbi
Ibhola ElingenantamboIbhola Elingenantambo
Iqoqo Lamakhanda EbholaIqoqo Lamakhanda Ebhola
Isethi yezikulufudrayivaIsethi yezikulufudrayiva
Isipanela esilungisekayoIsipanela esilungisekayo
10

The patent drawing

US 8,146 drawing sheet, public domain (expired patent).
Isinyathelo 10 - Image 1
11

Swing and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres and put on the lid. Swing the tank steadily to and fro at its own pace; the dasher rises and falls. Time until the butter comes. Lift the false bottom out by its staff, bringing the butter with it, and let the buttermilk drain back. Rinse and salt the butter in a bowl, and weigh it.

Izinto zokwakha zalesi sinyathelo:

Ukhilimu ojiyileUkhilimu ojiyile2000 ml
Usawoti Wolwandle OmkhuluUsawoti Wolwandle Omkhulu1 ucezu
AmanziAmanzi1 ucezu

Amathuluzi adingekayo:

Ithemomitha enenaliti eshiywa ngaphakathiIthemomitha enenaliti eshiywa ngaphakathi
Iwashi Lokumisa IsikhathiIwashi Lokumisa Isikhathi
Isikali Sedijithali SasekhishiniIsikali Sedijithali Sasekhishini
Isitsha esikhulu sokuxuba sensimbi engagqwaliIsitsha esikhulu sokuxuba sensimbi engagqwali
12

A dasher that sticks, a swing that won't keep going

Pendulum swing dash churn troubleshooting.

Flow

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13

History and honest limits

**Ithiel S. Richardson** of Boston, Suffolk County, Massachusetts, received US 8,146, dated 10 June 1851 (the drawing sheet's lettering reads "J. S."; the specification gives Ithiel). His standards were 2½ by 1½ inches square and four feet long; the swing's board was 12 by 16 inches; the stroke could be shortened by moving the couplings. He claimed the combination of the rock shaft, levers, connecting rod and swing for producing the perpendicular movement of the dasher. **Honest limits.** A smaller frame, a food-grade container and printed parts stand in for his. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Izinto

15

Amathuluzi Adingekayo

12

Amafayela omklamo

3

Le blueprint yenza

Thumbnail
Isibambeli

Isitsha sokuphehla ibhotela

Free

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Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

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CC0 Isizinda Somphakathi

Le blueprint ikhishwe ngaphansi kwe-CC0. Ukhululekile ukukopisha, ukuguqula, ukusabalalisa, nokusebenzisa ngaphandle kwemvume.

Sekela uMenzi ngokuthenga imikhiqizo nge-Blueprint yabo IKhomishane Yomenzi kumiswe ngabathengisi, noma dala inguqulo entsha yale Blueprint bese uyifaka njengoxhumaniso ku-Blueprint yakho ukuze wabelane ngemali engenayo.

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