Samvinna
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FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
Star-Dasher Crank Churn: Geared Crank and Flywheel Drive Two Notched Dashers Set Point Over Gap
L. Lake (USPTO drawing) · Public domain
Martin

Búin til af

Martin

9. nóvember 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.
Miðlungs
About 2 days, plus printing

Leiðbeiningar

1

Strokes per turn of the handle

Hleð Jupyter-vinnubók…
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.
HönnunarskráSTLCC0 - 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.
HönnunarskráSTLCC0 - 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.

Efni fyrir þetta skref:

FuruborðFuruborð2 stykki
Mjúkviður 70x70 mmMjúkviður 70x70 mm2 stykki
HarðviðarborðHarðviðarborð2 stykki
Tréskrúfa nr. 10 x 3"Tréskrúfa nr. 10 x 3"20 stykki
TrélímTrélím1 stykki

Nauðsynleg verkfæri:

HandsögHandsög
HleðsluborHleðslubor
Spaðabora-settSpaðabora-sett
SporjárnSporjárn
HallamálHallamál
MálbandMálband
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.

Efni fyrir þetta skref:

HarðviðarborðHarðviðarborð1 stykki
Stöng úr ryðfríu stáliStöng úr ryðfríu stáli1 stykki
HrástálsstöngHrástálsstöng2 stykki
PETG-þráðurPETG-þráður1 stykki
KrossviðarplataKrossviðarplata1 stykki
HarðviðartapparHarðviðartappar1 stykki
TrélímTrélím1 stykki
SexkantboltaúrvalSexkantboltaúrval4 stykki
Læsiró með nælonhringLæsiró með nælonhring4 stykki

Nauðsynleg verkfæri:

FDM-þrívíddarprentariFDM-þrívíddarprentari
StingsögStingsög
JárnsögJárnsög
HleðsluborHleðslubor
BorasettBorasett
Þjalir (handþjöl)Þjalir (handþjöl)
SkiptilykillSkiptilykill
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.

Efni fyrir þetta skref:

KrossviðarplataKrossviðarplata1 stykki
HarðviðarborðHarðviðarborð2 stykki
TrélímTrélím1 stykki
Stöng úr ryðfríu stáliStöng úr ryðfríu stáli1 stykki
Flöt skinnaFlöt skinna2 stykki
20 lítra fata20 lítra fata1 stykki

Nauðsynleg verkfæri:

StingsögStingsög
HandsögHandsög
SporjárnSporjárn
HleðsluborHleðslubor
BorasettBorasett
SandpappírSandpappír
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.
HönnunarskráBLENDCC0 - Free
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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.

Efni fyrir þetta skref:

RjómiRjómi10 l
Gróft sjávarsaltGróft sjávarsalt1 stykki
VatnVatn1 stykki

Nauðsynleg verkfæri:

Hitamælir með nema sem situr íHitamælir með nema sem situr í
SkeiðklukkaSkeiðklukka
Stafræn eldhúsvogStafræn eldhúsvog
Stór hrærskál úr ryðfríu stáliStór hrærskál úr ryðfríu stáli
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.

Efni

17

Nauðsynleg verkfæri

17

Hönnunarskrár

3

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CC0 opinbert ríki

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