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Hung-Dasher Churn: The Dasher Hangs in a Long Hinged Journal Box Above the Lid, No Step in the Tub
Jehu Mitchell · Public domain
Buttercup

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Buttercup

11. nóvember 2026IE
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Hung-Dasher Churn: The Dasher Hangs in a Long Hinged Journal Box Above the Lid, No Step in the Tub

Jehu Mitchell of Aleppo township, Pennsylvania, received US 27,927, dated 17 April 1860, for a churn. The dasher hangs from above in a long journal box on a standard fixed to the lid, with no step or metal bearing in the tub, whose "oxidation ... imparts a bad flavor to the butter". One half of the box is a cap hinged at one side: lift out half the lid, unhook the cap and the dasher comes out with the gearing left in place. The patent gives no sizes; every size here is ours.
Miðlungs
About 2 days, plus printing

Leiðbeiningar

1

Held from above

Hleð Jupyter-vinnubók…
2

A crank-turned upright dasher, one week before

Lynch's shaft stands in a step on the bottom. Mitchell hangs his from above, with nothing in the tub.
3

Read US 27,927

"Suspending the dasher within an elongated hinged journal box in the manner described, combined the following advantages. A rigid bearing is afforded to the dasher so as to prevent any tremulous motion, without the necessity of any metallic step or bearing within the churn, the oxidation of which imparts a bad flavor to the butter."
4

Print the driving wheel E

Crown wheel, 36 teeth on its face, module 2, with a hub; bored 12.4 mm. PETG, 0.2 mm layers, 40 % infill, 4 walls.
HönnunarskráSTLCC0 - Free
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5

Print the pinion M

Spur pinion, 12 teeth, module 2, with a hub; bored 12.4 mm. PETG, 0.2 mm layers, 40 % infill, 4 walls.
HönnunarskráSTLCC0 - Free
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6

Lid B and C, brakes O

Cut a hardwood lid 15 mm thick to sit on the bucket's rim and saw it in two across the middle: part C carries the standard, part B lifts out. Cut a 28 mm half-hole in the middle of the cut edge for the shaft and a 30 mm hole in B to look in. Screw three hardwood brakes O, 30 mm deep and 245 tall, to the bucket's side a third of a turn apart, and seal the screw holes outside with silicone.

Efni fyrir þetta skref:

20 lítra fata20 lítra fata1 stykki
HarðviðarborðHarðviðarborð2 stykki
TréskrúfurTréskrúfur6 stykki
SílikonþéttiefniSílikonþéttiefni1 stykki

Nauðsynleg verkfæri:

StingsögStingsög
BorðsögBorðsög
Spaðabora-settSpaðabora-sett
HleðsluborHleðslubor
BorasettBorasett
SkrúfjárnasettSkrúfjárnasett
MálbandMálband
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Standard D, journal box and cap G

Glue up a hardwood standard 60 mm wide and 66 deep, 111 mm tall above the lid, with its back 22 mm rising to 217 mm and bored 12.6 mm across near the top for the wheel's axle. Mortise it into lid part C behind the shaft's hole. Cut a cap G 60 x 30 mm, 111 tall, and bore a 25.2 mm hole down the joint between standard and cap, half in each. Hang the cap on a butt hinge at one side and fit a hook H and eye I on the other.

Efni fyrir þetta skref:

HarðviðarborðHarðviðarborð1 stykki
TrélímTrélím1 stykki
SkáphjörSkáphjör1 stykki
Krókur og lykkjaKrókur og lykkja1 stykki
TréskrúfurTréskrúfur4 stykki

Nauðsynleg verkfæri:

BorðsögBorðsög
Stangajárnasett fyrir tréStangajárnasett fyrir tré
StangarþvingaStangarþvinga
HleðsluborHleðslubor
BorasettBorasett
Spaðabora-settSpaðabora-sett
SkrúfjárnasettSkrúfjárnasett
8

Dasher J with wings N and collars K and L

Cut a 25 mm hardwood dowel 485 mm long and glue a 12 mm stainless spindle into its top, standing 56 mm out. Glue two hardwood wings 200 x 60 x 20 mm across it, 20 and 140 mm above its foot, each bored with two 24 mm holes. Fit a hardwood collar L 44 mm across just below the lid, and a collar K 40 mm across on the spindle resting on the box's top. Set the shaft in the box, close the cap, and key the pinion M on the spindle above K.

Efni fyrir þetta skref:

HarðviðartapparHarðviðartappar2 stykki
HarðviðarborðHarðviðarborð1 stykki
Stöng úr ryðfríu stáliStöng úr ryðfríu stáli1 stykki
TrélímTrélím1 stykki
HarðviðarkubburHarðviðarkubbur1 stykki
Shaft CollarShaft Collar1 stykki
PETG-þráðurPETG-þráður1 stykki

Nauðsynleg verkfæri:

FDM-þrívíddarprentariFDM-þrívíddarprentari
BorðsögBorðsög
Spaðabora-settSpaðabora-sett
HleðsluborHleðslubor
BorasettBorasett
JárnsögJárnsög
Þjalir (handþjöl)Þjalir (handþjöl)
SandpappírSandpappír
9

Driving wheel E and crank

Pass a 12 mm stainless axle through the standard's back, fit the wheel E on it meshing the pinion, and a hardwood crank with a dowel handle on the other end; hold it with a collar and split pin.

Efni fyrir þetta skref:

Stöng úr ryðfríu stáliStöng úr ryðfríu stáli1 stykki
HarðviðarborðHarðviðarborð1 stykki
HarðviðartapparHarðviðartappar1 stykki
TrélímTrélím1 stykki
Shaft CollarShaft Collar1 stykki
SplittiSplitti1 stykki

Nauðsynleg verkfæri:

JárnsögJárnsög
Þjalir (handþjöl)Þjalir (handþjöl)
HleðsluborHleðslubor
BorasettBorasett
SkrúfstykkiSkrúfstykki
10

The build in 3D

FreeCAD model of this build, the bucket cut open: the dasher J with its two wings hanging from the journal box, the brakes O, the lid, the standard D with its hinged cap G, hook and eye, and the wheel E with pinion M.
HönnunarskráBLENDCC0 - Free
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11

Churn

Pour about 8 litres of heavy cream at about 15 °C, checked with the thermometer, into the bucket, set the lid and dasher in place, and turn the crank steadily, timing it. To look at the butter, lift out lid part B. When the butter comes, lift part B out, unhook the cap and take the dasher out, take out the butter, pour the buttermilk into a bowl, wash the butter in cold water until it runs clear, salt and weigh it.

Efni fyrir þetta skref:

RjómiRjómi8 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
12

Troubleshooting

Hung-dasher churn troubleshooting.

Flow

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13

History and honest limits

**Jehu Mitchell** of Aleppo township, Greene County, Pennsylvania, US 27,927, 17 April 1860, "Churn". He did not claim a churn without a bottom step nor a hinged bearing alone, but the gearing, standard, hinged cap, dasher and collar together. His journal box runs higher; ours stops below the crown wheel. His wings and brakes are "of common construction"; our two wings and three brakes, and every size, are ours.

Efni

16

Nauðsynleg verkfæri

18

Hönnunarskrár

3

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