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Telegraph Beater Churn: Nested Knife-Edged Beaters That Whip the Cream
Martin

Yaremwe na

Martin

6. Ukwakira 2026NO
19
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Telegraph Beater Churn: Nested Knife-Edged Beaters That Whip the Cream

Robbins compared his agitator's work on cream to that "produced by knives upon the whites of eggs, during the process of what is called whipping them up." Z. C. Robbins of St. Louis, Missouri, received US 6,556, dated 26 June 1849 (antedated 1 June 1849, reissued as No. 159), for what he called the Telegraph Churn: a rotating agitator of four series of thin beaters on radial arms, each series of two, three or more slats one within another with narrow spaces between, narrowing inward. Their front edges are bevelled sharp, their rear edges blunt; reversed, "the butter will be collected into the center." This rung works out when the cream would fly off, then prints the beater series and spiders, fits them in a box, and makes butter.
Hagati
About 3 hours, plus printing

Amabwiriza

1

When the cream flies off

Gupakira ikaye ya Jupyter…
2

Bevelled beaters on a crank before it

The embedded blueprint bevels its buckets to drive the cream inward. Robbins nests thin knife-edged slats and reverses them to gather the butter.
3

Read US 6,556

"When the agitator is rotated in milk or cream placed in the churn box, the sharp edges of the beaters cut into and divide the particles, and gather the milk or cream between them by their converging surfaces; and as the beaters ascend, they carry up quantities of milk or cream in the spaces between them, which is discharged in their curved sheets at their rear edges in the atmosphere in the upper part of the churn."
4

Print the parts

Print four beater series on end: three nested slats, narrowing inward, sharp at the front and blunt at the rear, joined at both ends. Print two spiders and the crank arm. 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 beater series

The beater series, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
6

Print the spider

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

Print the crank arm

The crank arm, printed as step 4 describes.
Dosiye y'IgishushanyoSTLCC0 - Free
8

Assemble the agitator

Glue the two spiders on a 10 mm square hardwood axle 130 mm apart, arms in line. Screw a beater series between each pair of arms with M3 screws, all with their sharp edges leading the same way.

Ibikoresho by'iyi ntambwe:

Udukoni tw'ibiti bikomeyeUdukoni tw'ibiti bikomeye1 igice
Ibitorezo by'imashiniIbitorezo by'imashini1 igice
Ikinyabutabire cy'IbitiIkinyabutabire cy'Ibiti1 igice

Ibikoresho bikenewe:

Umucumita w'IntokiUmucumita w'Intoki
Ikusanyirizo ry'ibitoreziIkusanyirizo ry'ibitorezi
9

The box

Take a food-safe box about 200 × 170 × 170 mm. Drill both ends on the axis 85 mm up, round the axle where it runs, pass it through, and glue the crank arm and a dowel handle on its outer end. He found it could run uncovered.

Ibikoresho by'iyi ntambwe:

Ikibindi cyo kubikamo cy'urwego rw'ibiribwaIkibindi cyo kubikamo cy'urwego rw'ibiribwa1 igice
Ikinyabutabire cy'IbitiIkinyabutabire cy'Ibiti1 igice

Ibikoresho bikenewe:

Icyuma Cyivumbura Kidafite InsingaIcyuma Cyivumbura Kidafite Insinga
Ibyuma Byinshi byo GucukuraIbyuma Byinshi byo Gucukura
Urupapuro rwo GusyaUrupapuro rwo Gusya
10

The build in 3D

FreeCAD model of this build, not of the patent: the box with one side off to show the agitator of two spiders and four series of nested beaters on the axle, and the crank.
Dosiye y'IgishushanyoBLENDCC0 - Free
11

Crank, then reverse to gather

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 1.5 litres. Crank steadily, sharp edges leading; time until the butter comes. Then crank backward a while so the blunt rear edges gather it to the centre. 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 11 - Image 1

Ibikoresho by'iyi ntambwe:

Igice cy'ibinure cy'amataIgice cy'ibinure cy'amata1500 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
12

Cream thrown out, butter not gathered

Telegraph beater churn troubleshooting.

Flow

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13

History and honest limits

**Z. C. Robbins** of St. Louis, Missouri, received US 6,556, dated 26 June 1849; antedated by request 1 June 1849; reissued as No. 159. He wrote that "butter has been produced from milk at the usual churning temperature with this churn, in two minutes"; that is his claim, not our measurement. He did not limit himself to the number or proportions of the parts, nor to any material. He claimed the series of floats or beaters so formed that their thick inclined rear edges gather the butter toward the centre when the motion is reversed. **Honest limits.** A food-safe box and printed beaters 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.

Ibikoresho

8

Ibikoresho bikenewe

10

Dosiye z'igishushanyo

4

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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