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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

Imeundwa na

Martin

9. Novemba 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.
Kati
About 2 days, plus printing

Maagizo

1

Strokes per turn of the handle

Inapakia daftari la 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.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
5

Print the wheel F

The 20-tooth wheel for the crank shaft. PETG, 0.2 mm layers, 50 % infill, 5 walls.
Faili ya UsanifuSTLCC0 - Free
Pakua modeli
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.

Vifaa kwa hatua hii:

Ubao wa msonobariUbao wa msonobari2 vipande
Mbao laini za 70x70 mmMbao laini za 70x70 mm2 vipande
Ubao wa Mti MgumuUbao wa Mti Mgumu2 vipande
Parafujo ya mbao #10 x 3"Parafujo ya mbao #10 x 3"20 vipande
Gundi ya MbaoGundi ya Mbao1 kipande

Zana zinazohitajika:

Msumeno wa mkonoMsumeno wa mkono
Kekee cha BetriKekee cha Betri
Seti ya vichwa bapa vya kutoboaSeti ya vichwa bapa vya kutoboa
PatasiPatasi
Rulani ya MajiRulani ya Maji
Tepi ya kupimiaTepi ya kupimia
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.

Vifaa kwa hatua hii:

Ubao wa Mti MgumuUbao wa Mti Mgumu1 kipande
Fimbo ya chuma cha puaFimbo ya chuma cha pua1 kipande
Fimbo ya chuma ghafiFimbo ya chuma ghafi2 vipande
Uzi wa PETGUzi wa PETG1 kipande
Bati la mbao za kubandikaBati la mbao za kubandika1 kipande
Vijiti vya mbao ngumuVijiti vya mbao ngumu1 kipande
Gundi ya MbaoGundi ya Mbao1 kipande
Mkusanyiko wa bolti za pembe sitaMkusanyiko wa bolti za pembe sita4 vipande
Nati ya Kufungasha yenye NailoniNati ya Kufungasha yenye Nailoni4 vipande

Zana zinazohitajika:

Printa ya 3D ya nyuzi (FDM)Printa ya 3D ya nyuzi (FDM)
Msumeno wa KupindaMsumeno wa Kupinda
Msumeno wa chumaMsumeno wa chuma
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Tupa (Tupa ya Mkono)Tupa (Tupa ya Mkono)
Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
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.

Vifaa kwa hatua hii:

Bati la mbao za kubandikaBati la mbao za kubandika1 kipande
Ubao wa Mti MgumuUbao wa Mti Mgumu2 vipande
Gundi ya MbaoGundi ya Mbao1 kipande
Fimbo ya chuma cha puaFimbo ya chuma cha pua1 kipande
Washa bapaWasha bapa2 vipande
Ndoo ya Lita 20Ndoo ya Lita 201 kipande

Zana zinazohitajika:

Msumeno wa KupindaMsumeno wa Kupinda
Msumeno wa mkonoMsumeno wa mkono
PatasiPatasi
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Sandarusi (karatasi ya kusugua)Sandarusi (karatasi ya kusugua)
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.
Faili ya UsanifuBLENDCC0 - Free
Pakua modeli
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.

Vifaa kwa hatua hii:

Malai nzitoMalai nzito10 l
Chumvi ya Bahari MbichiChumvi ya Bahari Mbichi1 kipande
MajiMaji1 kipande

Zana zinazohitajika:

Kipima joto chenye kijiti kinachobaki ndaniKipima joto chenye kijiti kinachobaki ndani
Saa ya kupima mudaSaa ya kupima muda
Mizani ya dijitali ya jikoniMizani ya dijitali ya jikoni
Bakuli kubwa la kuchanganyia la chuma cha puaBakuli kubwa la kuchanganyia la chuma cha pua
11

Troubleshooting

Star-dasher churn troubleshooting.

Flow

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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.

Vifaa

17

Zana Zinazohitajika

17

Faili za muundo

3

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Siagi

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

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Churning Butter from Cream — The 5,000-Year-Old Fat Separation

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