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Interlapping Spiral-Dasher Churn: Two Upright Shafts With Arms Set in Screw Form Interlap, One Turning the Other
Buttercup

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Buttercup

11. nóvember 2026IE
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Interlapping Spiral-Dasher Churn: Two Upright Shafts With Arms Set in Screw Form Interlap, One Turning the Other

D. M. Woodin of Brandon, Wisconsin, received US 28,528, dated 29 May 1860, for a churn. Two shafts stand side by side in a box, each with arms set round it in a screw form; the arms of one pass between the arms of the other, so turning one shaft with the crank turns the second "like spiral gearing". The two screws force the cream down between them and it rises again outside, while the arms meet and close on each other, breaking the globules. The patent gives no sizes; every size here is ours.
Miðlungs
About 2 days, plus printing

Leiðbeiningar

1

Where the shafts go

Hleð Jupyter-vinnubók…
2

Two dashers turning contrary ways, three months before

Vaughan joins his two dashers with pinions. Woodin lets the dashers' own arms drive one another.
3

Read US 28,528

"These two spiral wheels revolving in this way force the cream downward all the while, but it rising again on the outside of the wheels, is kept moving in a constant current from top to bottom, and from bottom to top. In addition to the friction thus caused and the moving of the cream in a constant current, the arms overlapping and interlapping mash the globules of the cream as they meet and press against each other."
4

Print the crown wheel

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
5

Print the pinion

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

Box A and steps

From 20 mm hardwood board make a box 350 x 220 mm inside and 350 deep; glue and screw it and seal the inside joints with silicone sealant. Screw two hardwood blocks 50 x 50 x 10 mm to the floor on the long centre line, 128 mm apart, the first 110 mm from one end, each bored 16.6 mm, 6 deep, as steps. Cut a lid to sit on top, bored 17 mm over each step.

Efni fyrir þetta skref:

HarðviðarborðHarðviðarborð3 stykki
HarðviðarkubburHarðviðarkubbur2 stykki
TrélímTrélím1 stykki
TréskrúfurTréskrúfur40 stykki
SílikonþéttiefniSílikonþéttiefni1 stykki

Nauðsynleg verkfæri:

BorðsögBorðsög
HleðsluborHleðslubor
BorasettBorasett
Spaðabora-settSpaðabora-sett
StangarþvingaStangarþvinga
SkrúfjárnasettSkrúfjárnasett
MálbandMálband
7

Wheels B, B with spiral arms a

For each wheel cut fourteen hardwood bars 190 x 30 x 20 mm and halve them together in pairs into seven crosses, each bored 16.2 mm at the crossing. Thread the crosses onto a 16 mm stainless shaft, 40 mm apart centre to centre from 40 mm above the floor, each turned 22.5 degrees from the one below, checked with the protractor, and pin each through. Turn the second wheel's crosses the opposite way, so its spiral is of the other hand. The driven shaft is 425 mm long, the other 375.

Efni fyrir þetta skref:

HarðviðarborðHarðviðarborð2 stykki
Stöng úr ryðfríu stáliStöng úr ryðfríu stáli2 stykki
TrélímTrélím1 stykki
SplittiSplitti14 stykki

Nauðsynleg verkfæri:

BorðsögBorðsög
Stangajárnasett fyrir tréStangajárnasett fyrir tré
HleðsluborHleðslubor
BorasettBorasett
JárnsögJárnsög
Þjalir (handþjöl)Þjalir (handþjöl)
GráðubogiGráðubogi
SandpappírSandpappír
8

Set the wheels and the gearing

Stand both shafts in their steps and turn the second so its arms sit 45 degrees between the first's at every level; they must pass each other about 5 mm apart all the way round. Put on the lid. On the driven shaft's top fit the pinion; on the lid screw two hardwood chairs carrying a 12 mm stainless crank shaft with the crown wheel meshing it, and a hardwood crank with a dowel handle. Hold the shafts with collars.

Efni fyrir þetta skref:

HarðviðarborðHarðviðarborð1 stykki
Stöng úr ryðfríu stáliStöng úr ryðfríu stáli1 stykki
HarðviðartapparHarðviðartappar1 stykki
TrélímTrélím1 stykki
TréskrúfurTréskrúfur8 stykki
Shaft CollarShaft Collar4 stykki
PETG-þráðurPETG-þráður1 stykki

Nauðsynleg verkfæri:

FDM-þrívíddarprentariFDM-þrívíddarprentari
BorðsögBorðsög
HleðsluborHleðslubor
BorasettBorasett
JárnsögJárnsög
SkrúfjárnasettSkrúfjárnasett
9

The build in 3D

FreeCAD model of this build, one side left off: the two wheels with their seven crossed stations turned in spirals of opposite hand, their arms interlapping, the steps, the lid and the crank with crown wheel and pinion on the driven shaft.
HönnunarskráBLENDCC0 - Free
10

Churn

Pour about 10 litres of heavy cream at about 15 °C, checked with the thermometer, into the box, put the lid and gearing on, and turn the crank steadily, timing it, the way that drives the cream down between the wheels. When the butter comes, lift off the lid and the wheels, take out the butter, tip the buttermilk into a bowl, wash the butter in cold water until it runs clear, 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

Interlapping-dasher churn troubleshooting.

Flow

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12

History and honest limits

**D. M. Woodin** of Brandon, Fond du Lac County, Wisconsin, US 28,528, 29 May 1860, "Churn". He claimed the two dasher shafts with wings in screw form, one turned by the other. He does not give the number of arms or how far each turns on; our seven stations of four arms, 22.5 degrees apart, and the spacing are ours, as are the printed crown wheel and pinion that stand in for his bevel wheels.

Efni

13

Nauðsynleg verkfæri

17

Hönnunarskrár

3

CC0 opinbert ríki

Þessi teikning er gefin út undir CC0. Þér er frjálst að afrita, breyta, dreifa og nota þetta verk í hvaða tilgangi sem er, án þess að biðja um leyfi.

Studdu smiðinn með því að kaupa vörur í gegnum teikningu hans þar sem hann fær þóknun smiða sem seljendur ákvarða, eða búðu til nýja endurskoðun á þessari teikningu og tengdu hana sem tengingu í þinni eigin teikningu til að deila tekjum.

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