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Partition Air-Tube Plunger Churn: Cream Rushing Through Branch Tubes Draws Air Down
John O'Neil, Xenia, Ohio · Public domain (expired patent)
Emma

Imeundwa na

Emma

6. Oktoba 2026SE
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Partition Air-Tube Plunger Churn: Cream Rushing Through Branch Tubes Draws Air Down

O'Neil used the rush of the cream itself to draw air into it. John O'Neil of Xenia, Ohio, received US 7,531, dated 30 July 1850, for an atmospheric churn: a box divided by a movable partition with its lower edge perforated; an air tube down the partition with a bowl at its top, in the lid, holding a spring-closed hinged valve; a horizontal tube at its foot and branch tubes through the partition's lower edge, which "serve the double purpose of breaking the cream as it passes through and of communicating the current of atmosphere to the opposite apartment." Two plungers on a rocking lever, one cut to pass over the air tube, work oppositely. This rung estimates the suction, then prints the partition with its tubes, the valve bowl and the plungers, builds the box and lever, and makes butter.
Juu
About 5 hours, plus printing

Maagizo

1

The suction

Inapakia daftari la Jupyter…
2

Two plungers forcing cream through holes before it

The embedded blueprint throws cream between three chambers. O'Neil uses two, and lets the cream's rush through branch tubes draw air down an air tube.
3

Read US 7,531

"The depression of one, and the same time the elevation of the other causes the cream to be violently rushed through the horizontal tubes d, d, and the holes in the partition from one apartment to the other alternately. The passage of the cream through the tubes d, d, causes a suction of the atmosphere down the pipe b, through the horizontal part of the tube c, to d, d, and thence to the body of cream in each apartment."
4

Print the parts

Print the partition with its air tube, foot tube and branches in one piece, with supports. Blow through the tube's top to check air comes out of both branches. Print the valve bowl, one plunger and one notched plunger. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Vifaa kwa hatua hii:

Uzi wa PETGUzi wa PETG1 kipande

Zana zinazohitajika:

Printa ya 3D ya nyuzi (FDM)Printa ya 3D ya nyuzi (FDM)
5

Print the partition with its air tube, foot tube and branches

The partition with its air tube, foot tube and branches, printed as step 4 describes.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
6

Print the valve bowl

The valve bowl, printed as step 4 describes.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
7

Print the plunger

The plunger, printed as step 4 describes.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
8

Print the notched plunger

The notched plunger, printed as step 4 describes.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
9

Box, partition and valve

Take a food-safe box about 220 × 120 × 180 mm and fit two plywood strips inside the long sides at the middle as grooves, so the partition slides in and out. Drill the lid over the air tube's top and seat the bowl's spigot onto the tube through it. Hinge a small leather flap on the bowl's seat with a light spring, as his, so air passes down but cream cannot rise.

Vifaa kwa hatua hii:

Chombo cha kuhifadhi cha daraja la chakulaChombo cha kuhifadhi cha daraja la chakula1 kipande
Bati la mbao za kubandikaBati la mbao za kubandika1 kipande
Ukanda wa ngoziUkanda wa ngozi1 kipande
Kizibo cha SilikoniKizibo cha Silikoni1 kipande

Zana zinazohitajika:

Msumeno wa kukata mikunjoMsumeno wa kukata mikunjo
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
10

Plungers and lever

Glue a 12 mm hardwood dowel rod in each plunger, the notched one on the side of the air tube. Screw a pine standard to each side of the box at the middle, pass a dowel axle through them and a pine lever, and join each rod to the lever on a loose screw.

Vifaa kwa hatua hii:

Vijiti vya mbao ngumuVijiti vya mbao ngumu1 kipande
Ubao wa msonobariUbao wa msonobari1 kipande
Skrubu za mashineSkrubu za mashine1 kipande
Nati ya pembe sitaNati ya pembe sita1 kipande
Gundi ya MbaoGundi ya Mbao1 kipande
Skrubu ya mti #8 x inchi 1Skrubu ya mti #8 x inchi 11 kipande

Zana zinazohitajika:

Msumeno wa mkonoMsumeno wa mkono
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Seti ya bisibisiSeti ya bisibisi
11

The patent drawing

US 7,531 drawing sheet, public domain (expired patent).
Hatua 11 - Image 1
12

Rock and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 1.5 litres. Rock the lever briskly; bubbles should come from the branch tubes. 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.

Vifaa kwa hatua hii:

Malai nzitoMalai nzito1500 ml
Chumvi ya Bahari MbichiChumvi ya Bahari Mbichi1 kipande
MajiMaji1 kipande

Zana zinazohitajika:

Kipima joto chenye kijiti kinachobaki ndaniKipima joto chenye kijiti kinachobaki ndani
Saa ya kupima mudaSaa ya kupima muda
Mizani ya dijitali ya jikoniMizani ya dijitali ya jikoni
Bakuli kubwa la kuchanganyia la chuma cha puaBakuli kubwa la kuchanganyia la chuma cha pua
13

No air, cream in the bowl

Partition air-tube churn troubleshooting.

Flow

Loading...
14

History and honest limits

**John O'Neil** of Xenia, Greene County, Ohio, received US 7,531, dated 30 July 1850. His plungers had parts of two sides cut away, leaving about 1½ inches at each corner, "for the purpose of gathering the butter above the dasher." He claimed the construction of the air tubes in combination with the plungers and partition. **Honest limits.** Printed parts and a food-safe box stand in for his; the notebook's pressure drop is a rough estimate. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Vifaa

14

Zana Zinazohitajika

10

Faili za muundo

4

Mchoro huu unatengeneza

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

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Valved Hollow-Staff Plunger Churn: A Valve at the Top, Air Forced Out at the Foot

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