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Ventilating Paddle Rocking Churn: Hinged Paddles That Strike One Way and Slip the Other
George W. Cook, Schenectady, New York · Public domain (expired patent)
Woody

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Woody

6. Ukwakira 2026NO
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Ventilating Paddle Rocking Churn: Hinged Paddles That Strike One Way and Slip the Other

Cook set out to let "a current of fresh air" into the churn "to hasten the production of the butter and to improve its quality." George W. Cook of Schenectady, New York, received US 3,460, dated 28 February 1844, for "Cook's Ventilating Churn": a semi-cylinder balanced on pivots so it rocks easily, its top closed by thin boards except a narrow opening in the middle. Inside, two frames at about 45° from the vertical, inclined opposite ways, carry perforated paddles hung on gudgeons. As the vessel is canted, one set swings square to its frame and strikes the cream while the other turns flat against its stops. This rung works out how the paddles hang, then prints the ends, frames and paddles, bends a stainless semi-cylinder, and makes butter.
Hejuru
About 6 hours, plus printing

Amabwiriza

1

How the paddles hang

Gupakira ikaye ya Jupyter…
2

A rocking churn on pivots before it

The embedded blueprint rocks a box on gudgeons with springs to return it. Cook balances his vessel on pivots and puts hinged paddles inside.
3

Read US 3,460

"When the vessel is canted, as represented in Fig. 2 the paddles N drop down or turn on their gudgeons assuming a position nearly at right angles to the sides of the frame of the paddles. At the same time the paddles N2 of the other frame turn until they are in a line parallel with the sides of the frame when they strike against pins or stops O2 inserted into the sides of the frame on the inside thereof."
4

Print the parts

Print two vessel ends flat (/uploads/blueprints/ventilating-paddle-rocking-churn-end.stl), each with its groove, pivot boss and the two ledges for the frames. Print two frames (/uploads/blueprints/ventilating-paddle-rocking-churn-frame.stl) and eight perforated paddles (/uploads/blueprints/ventilating-paddle-rocking-churn-paddle.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Ibikoresho by'iyi ntambwe:

Fibere ya PETGFibere ya PETG1 igice

Ibikoresho bikenewe:

Imashini icapa 3D ikoresha umugozi (FDM)Imashini icapa 3D ikoresha umugozi (FDM)
5

Bend and close the vessel

Cut a 0.5 mm stainless sheet 160 mm wide and about 252 mm long, deburr it, and bend it round a 160 mm form into a half circle. Seat it in both ends' grooves in silicone. Cut two thin plywood boards to close the top, sloping 10–15° down toward the middle and leaving a narrow opening there, as his.

Ibikoresho by'iyi ntambwe:

Urupapuro rw'icyuma kitagira ingese - 304Urupapuro rw'icyuma kitagira ingese - 3041 igice
Igifunga cya silikoneIgifunga cya silikone1 igice
Urupapuro rw'ibiti byometseUrupapuro rw'ibiti byometse1 igice

Ibikoresho bikenewe:

Ibyuma bikata ibyuma bisanzweIbyuma bikata ibyuma bisanzwe
Igikoresho cyo gukuraho ibisigazwa ku mperaIgikoresho cyo gukuraho ibisigazwa ku mpera
Inyundo ya kawushuInyundo ya kawushu
IbifataIbifata
Umucumita w'ImigororwaUmucumita w'Imigororwa
6

Hang the paddles and the vessel

Hang four paddles in each frame on M3 screws through the frame's sides, so they swing freely and lie against the stops one way. Set the two frames on the ledges inside the vessel, inclined opposite ways. Build a pine stand with two posts and hang the vessel on an M8 bolt through each end's boss, so it is nicely balanced.

Ibikoresho by'iyi ntambwe:

Ibitorezo by'imashiniIbitorezo by'imashini1 igice
Umupira w'Impande EsheshatuUmupira w'Impande Esheshatu1 igice
Ikibaho cy'igiti cya pinusiIkibaho cy'igiti cya pinusi1 igice
Uruganda rw'igiti #8 x 1"Uruganda rw'igiti #8 x 1"1 igice
Ikinyabutabire cy'IbitiIkinyabutabire cy'Ibiti1 igice

Ibikoresho bikenewe:

Umucumita w'IntokiUmucumita w'Intoki
Icyuma Cyivumbura Kidafite InsingaIcyuma Cyivumbura Kidafite Insinga
Ibyuma Byinshi byo GucukuraIbyuma Byinshi byo Gucukura
Ikusanyirizo ry'ibitoreziIkusanyirizo ry'ibitorezi
Isupana ihindurwaIsupana ihindurwa
7

The patent drawing

US 3,460 drawing sheet, public domain (expired patent).
Intambwe 7 - Image 1
8

Rock and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour 500 ml through the middle opening. Rock the vessel steadily from side to side; time until the butter comes. Lift out the frames, then 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.

Ibikoresho by'iyi ntambwe:

Igice cy'ibinure cy'amataIgice cy'ibinure cy'amata500 ml
Umunyu w'inyanja muniniUmunyu w'inyanja munini1 igice
AmaziAmazi1 igice

Ibikoresho bikenewe:

Igipima ubushyuhe gifite uruti rusigara mu kintuIgipima ubushyuhe gifite uruti rusigara mu kintu
Isaha yo GuhagarikaIsaha yo Guhagarika
Iminzani ya Digitale yo mu GikoniIminzani ya Digitale yo mu Gikoni
Ibakure rinini ryo kuvanga ry'icyuma kitagira ingeseIbakure rinini ryo kuvanga ry'icyuma kitagira ingese
9

Paddles that stick, a vessel that tips

Ventilating paddle rocking churn troubleshooting.

Flow

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10

History and honest limits

**George W. Cook** of Schenectady, New York, received US 3,460, dated 28 February 1844. Blocks on the vessel's convex side met a cross bar of the frame to stop it canting too far; handles in its side rocked it; iron straps strengthened it; a plugged aperture drew off the milk; a button held the two frames in place. He claimed combining with a rocking churn "floats or paddles arranged in and hinged to a frame." **Honest limits.** Stainless sheet, plywood and printed parts stand in for his wooden vessel and frames. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Ibikoresho

12

Ibikoresho bikenewe

15

Iki gishushanyo gikora

Thumbnail
Agateganyo

Igisabo cyo gucunda amavuta

Free

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Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

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Water-Jacketed Churn: Hot or Cold Water Under a Metal Plate Tempers the Cream

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CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.

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