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Window-Blind Dasher Churn: Slats Set Slantwise Through the Staff, Turned Back and Forth by a Cord From a Swinging Disk
Buttercup

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Buttercup

11. Ugushyingo 2026IE
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Window-Blind Dasher Churn: Slats Set Slantwise Through the Staff, Turned Back and Forth by a Cord From a Swinging Disk

Samuel A. Kerr of Arbor Hill, Virginia, received US 28,757, dated 19 June 1860, for a churn. Flat slats pass slantwise through an upright staff, one above another like the slats of a window blind. A cord from a disk swung back and forth by a handle turns the staff to and fro: the slats on one side throw the cream up, those on the other throw it down, and it passes between them from side to side. Turned gently, the overlapping slats gather the butter. A funnel in the lid lets air in. The patent gives no sizes; every size here is ours.
Hagati
About 2 days, plus printing

Amabwiriza

1

Slats like a window blind

Gupakira ikaye ya Jupyter…
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Oblique slats that throw the cream, three months before

Embree sets his slats inside a turning barrel. Kerr sets them through a staff turned to and fro.
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Read US 28,757

"By this oblique arrangement of the blades or slats on a vibrating or turning dasher staff, the cream or milk will, when the staff is rapidly vibrating, be thrown downward, on one side of the staff, and upward, on the other side, at each back or forward movement; and it also will be caused to pass between the slats from one side of the churn to the other."
4

Print the air funnel B

Funnel 80 mm across at its mouth with a 39 mm spout 30 mm long to pass through the lid. PETG, 0.2 mm layers, 4 walls.
Dosiye y'IgishushanyoSTLCC0 - Free
5

Dasher C: staff and slats a

Cut a 35 mm square hardwood staff 340 mm long and glue 12 mm stainless spindles into its ends. Cut five hardwood slats 240 x 60 x 8 mm and drill each with four 12 mm holes. Chisel five slots through the staff, each at 45 degrees to it and 45 mm apart from 80 mm above its foot, all sloping the same way, and glue the slats through them, centred, so each slat's lower edge meets the next one's upper edge.

Ibikoresho by'iyi ntambwe:

Ikibaho cy'Igiti GikomeyeIkibaho cy'Igiti Gikomeye1 igice
Agati k'icyuma kitagira ingeseAgati k'icyuma kitagira ingese1 igice
Ikinyabutabire cy'IbitiIkinyabutabire cy'Ibiti1 igice

Ibikoresho bikenewe:

Ikimasa cyo ku mezaIkimasa cyo ku meza
Ibikoresho by'amasuka y'igitiIbikoresho by'amasuka y'igiti
Igipima IngoroIgipima Ingoro
Icyuma Cyivumbura Kidafite InsingaIcyuma Cyivumbura Kidafite Insinga
Ibyuma Byinshi byo GucukuraIbyuma Byinshi byo Gucukura
Umucumita w'IbyumaUmucumita w'Ibyuma
Urupapuro rwo GusyaUrupapuro rwo Gusya
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Lid, bar, step and funnel B

Screw a hardwood step 50 x 50 x 8 mm, bored 12.6 mm, to the bucket's floor centre. Cut an HDPE lid to fit the rim with a 26 mm hole over the centre and a 40 mm hole beside it for the funnel. Screw a hardwood bar 510 x 50 x 25 mm across the lid, bored over the centre, reaching 300 mm out past the rim, with a hardwood bracket under its end against the bucket's side. Push the funnel into its hole.

Ibikoresho by'iyi ntambwe:

Indobo ya Litiro 20Indobo ya Litiro 201 igice
Igihimba cy'Igiti GikomeyeIgihimba cy'Igiti Gikomeye1 igice
Urupapuro rwa HDPEUrupapuro rwa HDPE1 igice
Ikibaho cy'Igiti GikomeyeIkibaho cy'Igiti Gikomeye1 igice
Imisumari y'ibitiImisumari y'ibiti10 ibice
Fibere ya PETGFibere ya PETG1 igice

Ibikoresho bikenewe:

Imashini icapa 3D ikoresha umugozi (FDM)Imashini icapa 3D ikoresha umugozi (FDM)
Umucumita wa JigsawUmucumita wa Jigsaw
Ibyuma byo gucamo utwengeIbyuma byo gucamo utwenge
Ikimasa cyo ku mezaIkimasa cyo ku meza
Icyuma Cyivumbura Kidafite InsingaIcyuma Cyivumbura Kidafite Insinga
Ibyuma Byinshi byo GucukuraIbyuma Byinshi byo Gucukura
Ikusanyirizo ry'ibitoreziIkusanyirizo ry'ibitorezi
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Pulley, disk E, handle F and cord D

Turn or cut a hardwood pulley 60 mm across with a groove and fix it on the staff's top spindle above the bar. Cut a hardwood disk E 200 mm across with a groove round its edge, pivot it on a 12 mm stainless pin in the bar's end, and screw a hardwood handle F with an upright dowel grip across it. Tie a cord to the disk, take it round the pulley once and back to the disk, and tie it tight.

Ibikoresho by'iyi ntambwe:

Ikibaho cy'Igiti GikomeyeIkibaho cy'Igiti Gikomeye1 igice
Udukoni tw'ibiti bikomeyeUdukoni tw'ibiti bikomeye1 igice
Agati k'icyuma kitagira ingeseAgati k'icyuma kitagira ingese1 igice
Ikinyabutabire cy'IbitiIkinyabutabire cy'Ibiti1 igice
Imisumari y'ibitiImisumari y'ibiti4 ibice
Shaft CollarShaft Collar2 ibice
UmugoziUmugozi1 igice

Ibikoresho bikenewe:

Umucumita wa JigsawUmucumita wa Jigsaw
Icyuma Cyivumbura Kidafite InsingaIcyuma Cyivumbura Kidafite Insinga
Ibyuma Byinshi byo GucukuraIbyuma Byinshi byo Gucukura
Umucumita w'IbyumaUmucumita w'Ibyuma
Amakariso (Ikariso ry'Intoki)Amakariso (Ikariso ry'Intoki)
Urupapuro rwo GusyaUrupapuro rwo Gusya
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The build in 3D

FreeCAD model of this build, the bucket cut open: the staff with its five slantwise slats, the funnel, the bar with its bracket, the pulley, and the disk E with its handle F and the cord.
Dosiye y'IgishushanyoBLENDCC0 - Free
9

Churn

Pour about 8 litres of heavy cream at about 15 °C, checked with the thermometer, into the bucket, set the dasher in its step, put on the lid and bar, and swing the handle quickly back and forth, timing it. When the butter comes, swing it slowly and gently to gather it, as the patent says. Lift off the bar and lid, take out the dasher and butter, pour the buttermilk into a bowl, wash the butter in cold water until it runs clear, salt and weigh it.

Ibikoresho by'iyi ntambwe:

Igice cy'ibinure cy'amataIgice cy'ibinure cy'amata8 l
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
10

Troubleshooting

Window-blind dasher churn troubleshooting.

Flow

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11

History and honest limits

**Samuel A. Kerr** of Arbor Hill, Augusta County, Virginia, US 28,757, 19 June 1860 (signed 9 May 1860), "Churn". He claimed only the manner of arranging the slats on a vibrating or turning staff, not the means of vibrating it. He allows solid or perforated slats and a cord or chain; our slat count, angle and sizes are ours.

Ibikoresho

14

Ibikoresho bikenewe

16

Dosiye z'igishushanyo

2

CC0 Umurenge rusange

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