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Star-Dasher Crank Churn: Geared Crank and Flywheel Drive Two Notched Dashers Set Point Over Gap
L. Lake (USPTO drawing) · Public domain
Martin

Creado por

Martin

9. noviembre 2026NO
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Star-Dasher Crank Churn: Geared Crank and Flywheel Drive Two Notched Dashers Set Point Over Gap

Lorenzo Lake of Middlebury, Pennsylvania, received US 24,845, dated 19 July 1859, for an upright dash churn worked by gearing so that a child could churn even a very large churn. A handle turns a large wheel driving a wheel half its size on a crank shaft with a balance wheel; the crank's pitman works the staff up and down through a guide. The staff carries two dashers of boards with V-shaped slots in their ends, set so the points of one lie over the gaps of the other, cutting the cream as it escapes going down and up and dashing it against the sides. This rung builds it with printed gears over a 20-litre bucket.
Intermedio
About 2 days, plus printing

Instrucciones

1

Strokes per turn of the handle

Cargando el cuaderno de Jupyter…
2

A crank and pitman working the staff, before it

Dorsey's pitman also turned the staff. Lake's only lifts it, through gearing and a balance wheel for speed.
3

Read US 24,845

"... these dashers are so placed upon the staff that the sharpened ends of the boards thus cut, will cover the spaces left between the boards in the dasher immediately above or below—so that when operated in the churn the cream will be more thoroughly cut and the globules will be more easily and speedily broken."
4

Print the wheel E

The 40-tooth wheel for the handle's shaft. PETG, 0.2 mm layers, 50 % infill, 5 walls.
Archivo de DisenoSTLCC0 - Free
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5

Print the wheel F

The 20-tooth wheel for the crank shaft. PETG, 0.2 mm layers, 50 % infill, 5 walls.
Archivo de DisenoSTLCC0 - Free
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6

Platform, upright and frame

Screw a pine platform C 500 x 550 mm. Stand a 70 mm upright C' 990 mm tall at its back, braced. Screw a hardwood beam 130 x 255 x 40 mm out from the upright's top toward the front, and hang three hardwood blocks from it, each bored 20.5 mm 900 mm above the floor: two either side of the crank, 90 mm apart, for shaft G, and one 90 mm to the side for wheel E's shaft. Screw a hardwood guide arm I from the upright to over the bucket 430 mm up, with a 26 mm square hole.

Materiales para este paso:

Tabla de pinoTabla de pino2 piezas
Madera blanda de 70x70 mmMadera blanda de 70x70 mm2 piezas
Tabla de madera duraTabla de madera dura2 piezas
Tornillo para madera n.º 10 x 3"Tornillo para madera n.º 10 x 3"20 piezas
Cola de carpinteroCola de carpintero1 pieza

Herramientas necesarias:

SerruchoSerrucho
Taladro inalámbricoTaladro inalámbrico
Juego de brocas de palaJuego de brocas de pala
FormonesFormones
Nivel de burbujaNivel de burbuja
Cinta métricaCinta métrica
7

Crank shaft G, wheels and handle

Make the crank from two hardwood webs 30 x 10 mm, a 12 mm stainless pin 50 mm off the axis between them, and two 20 mm steel stubs, one each side, run through the hanging blocks. Fix wheel F on the rear stub and a plywood balance wheel B 300 mm across, with spokes, on the front stub. Run a 20 mm steel shaft through the third block with wheel E meshing with F, and a hardwood handle M 57 mm long with a dowel grip on its end.

Materiales para este paso:

Tabla de madera duraTabla de madera dura1 pieza
Varilla de acero inoxidableVarilla de acero inoxidable1 pieza
Barra de acero en brutoBarra de acero en bruto2 piezas
Filamento PETGFilamento PETG1 pieza
Tablero contrachapadoTablero contrachapado1 pieza
Espigas de madera duraEspigas de madera dura1 pieza
Cola de carpinteroCola de carpintero1 pieza
Surtido de tornillos hexagonalesSurtido de tornillos hexagonales4 piezas
Tuerca autoblocante con inserto de nailonTuerca autoblocante con inserto de nailon4 piezas

Herramientas necesarias:

Impresora 3D de filamento (FDM)Impresora 3D de filamento (FDM)
Sierra de calarSierra de calar
Sierra para metalesSierra para metales
Taladro inalámbricoTaladro inalámbrico
Juego de brocasJuego de brocas
Limas (lima de mano)Limas (lima de mano)
Llave inglesa ajustableLlave inglesa ajustable
8

Staff, dashers and pitman

Cut two plywood dashers L, each a 16-point star 250 mm across with its notches 20 mm deep, and a 25 mm square hole in the middle. Glue them on a 25 mm square hardwood staff D 150 mm apart, the upper turned half a point from the lower. Cut a hardwood pitman H 300 mm between centres with a fork at its foot; fit a hardwood thimble J on the staff's top and push an 8 mm stainless rod a through the fork, thimble and staff. Put the staff through the guide and the bucket's lid and set the lower dasher 25 mm off the floor at the bottom of the stroke.

Materiales para este paso:

Tablero contrachapadoTablero contrachapado1 pieza
Tabla de madera duraTabla de madera dura2 piezas
Cola de carpinteroCola de carpintero1 pieza
Varilla de acero inoxidableVarilla de acero inoxidable1 pieza
Arandela planaArandela plana2 piezas
Cubo de 20 litrosCubo de 20 litros1 pieza

Herramientas necesarias:

Sierra de calarSierra de calar
SerruchoSerrucho
FormonesFormones
Taladro inalámbricoTaladro inalámbrico
Juego de brocasJuego de brocas
Papel de lijaPapel de lija
9

The build in 3D

FreeCAD model of this build, half the bucket cut away: the platform and upright, the beam with its hanging blocks, the split crank shaft with balance wheel and wheel F, wheel E and handle M, the forked pitman and thimble, the staff through its guide, and the two star dashers. It was checked at eight crank angles.
Archivo de DisenoBLENDCC0 - Free
Descargar modelo
10

Churn

Pour about 10 litres of heavy cream at about 15 °C into the bucket, checked with the thermometer, and put the lid on round the staff. Turn the handle steadily and time it. When the butter comes, pull pin a, lift the staff out, pour off the buttermilk, wash the butter in cold water until it runs clear, work in a pinch of salt and weigh it.

Materiales para este paso:

Crema de leche espesaCrema de leche espesa10 l
Sal marina gruesaSal marina gruesa1 pieza
AguaAgua1 pieza

Herramientas necesarias:

Termómetro de sonda permanenteTermómetro de sonda permanente
CronómetroCronómetro
Báscula digital de cocinaBáscula digital de cocina
Bol grande de acero inoxidableBol grande de acero inoxidable
11

Troubleshooting

Star-dasher churn troubleshooting.

Flow

Loading...
12

History and honest limits

**Lorenzo Lake** of Middlebury, Tioga County, Pennsylvania, assignor to himself and William Patton of Towanda, US 24,845, 19 July 1859, "Churn". He claimed the dasher L worked by the devices described, not the gearing as such. His only proportion is wheel F about half wheel E. His dashers are boards with V-slotted ends; ours are plywood stars cut to the same pattern. Every size is ours.

Materiales

17

Herramientas requeridas

17

Archivos de diseño

3

Este plano hace

Thumbnail
Marcador

Mantequilla

Free

198
0
1
Thumbnail
Marcador

Suero de mantequilla

Free

72
0

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