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Air-Chest Spiral Agitator Churn: A Disk That Draws Air Down Its Agitator Into the Cream
Emma

Yaremwe na

Emma

7. Ukwakira 2026SE
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Air-Chest Spiral Agitator Churn: A Disk That Draws Air Down Its Agitator Into the Cream

Webster shaped the agitator so the turning disk breathes air into the cream. Hazen Webster of Ogdensburg, St. Lawrence County, New York, received US 12,370, dated 6 February 1855, for a "Machine for Producing Butter, called 'Webster Air-Chest Agitator'": a round open disk A with openings a, b, c, turning at the bottom of a square or circular box, carrying "a spiral inclined air agitator" B whose sides run from near the centre and diverge "with a curve or circle toward the circumference," surmounted toward the rim by vertical breakers. Turning, it "opens a passage for the air down through the opening a, and so discharges from the bottom of the churn ... up through the agitator B, up through the letter b." This rung works out the speed the air passage needs, then prints the air chest (disk, agitator and breaker in one), the step and gears, builds the churn, and makes butter.
Hagati
About 4 hours, plus printing

Amabwiriza

1

Breathing air in

Gupakira ikaye ya Jupyter…
2

The air disk it builds on

The embedded blueprint is S. P. Francisco's disk at the bottom of the churn with a tubular stem admitting air, which Webster names and does not claim. Webster claims the spiral agitator on such a disk.
3

Read US 12,370

"What I do claim, in combination with such rotating disk, is— That form of the agitator which occupies the central portions of the disk and sweeps toward the circumference in a spiral shape with rounded angles, and is surmounted toward the circumference with one or more vertical breakers, and this I claim whether used with or without the air passages herein described."
4

Print the parts

Print the air chest, disk down: the disk with its channel from a to the hooded mouth b, the spiral agitator with the opening c near its top, and the breaker. Print the step, the 36-tooth crown wheel, the 12-tooth pinion and the standard. 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

Print the air chest

The air chest, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
6

Print the step

The step, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
7

Print the crown wheel

The crown wheel, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
8

Print the pinion

The pinion, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
9

Print the standard

The standard, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
10

The churn

Use a straight-sided round food-grade container about 190 mm across inside and 230 mm deep. Stand the step in its bottom and a 10 mm square hardwood shaft in the step; slide the air chest down the shaft onto the step.

Ibikoresho by'iyi ntambwe:

Ikibindi cyo kubikamo cy'urwego rw'ibiribwaIkibindi cyo kubikamo cy'urwego rw'ibiribwa1 igice
Udukoni tw'ibiti bikomeyeUdukoni tw'ibiti bikomeye1 igice

Ibikoresho bikenewe:

Umucumita w'IntokiUmucumita w'Intoki
Urupapuro rwo GusyaUrupapuro rwo Gusya
11

Lid, gears and crank

Cut the lid in half and fix one half with a hole for the shaft. Push the pinion onto the shaft's top, screw the standard to the lid half and run a short 10 mm rod through its bearing into the crown wheel so its teeth mesh the pinion; screw a dowel handle into the wheel's boss.

Ibikoresho by'iyi ntambwe:

Umurongo Uzengurutse w'Icyuma CyoroshyeUmurongo Uzengurutse w'Icyuma Cyoroshye1 igice
Udukoni tw'ibiti bikomeyeUdukoni tw'ibiti bikomeye1 igice
Uruganda rw'igiti #8 x 1"Uruganda rw'igiti #8 x 1"1 igice
Ibitorezo by'imashiniIbitorezo by'imashini1 igice

Ibikoresho bikenewe:

Umucumita w'IbyumaUmucumita w'Ibyuma
Ikusanyirizo ry'ibitoreziIkusanyirizo ry'ibitorezi
Icyuma Cyivumbura Kidafite InsingaIcyuma Cyivumbura Kidafite Insinga
12

The build in 3D

FreeCAD model of this build, not of the patent: the tub cut away to show the air chest on its step, the spiral agitator rising above the cream line with the opening c near its top, the breaker, and the crown wheel and pinion on the half lid.
Dosiye y'IgishushanyoBLENDCC0 - Free
13

Churn and watch for air

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres, so the agitator's top stands above the cream. Crank briskly and watch for bubbles rising from the rim; 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.
Intambwe 13 - Image 1

Ibikoresho by'iyi ntambwe:

Igice cy'ibinure cy'amataIgice cy'ibinure cy'amata2000 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
14

No bubbles from the rim

Air-chest agitator troubleshooting.

Flow

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15

History and honest limits

**Hazen Webster** of Ogdensburg, St. Lawrence County, New York, received US 12,370, dated 6 February 1855; he signed on 18 January 1855. He wrote that in trials it produced "some fifteen to twenty per cent more butter" and gathered it "in from four to eight minutes"; those are his claims, not tested here. He disclaimed the rotating disk with a tubular air stem "as these have been used before with the churn of S. P. Francisco, patented June 19th 1847"; Francisco's US 6,544 is dated 19 June 1849. **Honest limits.** A container, printed parts and a crown wheel stand in for his box and drive, which he did not describe. The notebook's speeds are estimates; by hand the air may not flow (see the churns in MED-2518). FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Ibikoresho

9

Ibikoresho bikenewe

10

Dosiye z'igishushanyo

6

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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