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REVERSE ENGINEERING
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ÀWỌN OHUN WÍWỌ̀
Double-Concave Perforated Disk Dasher: Two Tin Domes With Half-Covered Holes
Marsh improved the dasher of "the plain old-fashioned churns so long used by farmers generally."
Joseph Marsh of Petersburg, Menard County, Illinois, received US 7,527, dated 30 July 1850, for a "double-concave perforated discoid churn-dasher": two convex pieces of tin or other suitable material, "perforated and placed on the upright," about six inches across with holes about three-quarters of an inch, "the several holes in B made to cover about half of the several holes in C." It works in a straight-sided churn by raising and pushing it, or by a lever.
This rung works out the open area, then prints the two domes and spacer, fits them to a staff, and makes butter.
Olùbẹ̀rẹ̀
About 1 hour, plus printing
Ìlànà
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Half-covered holes
Half-covered holes
Ń ṣí ìwé Jupyter…
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An improved common dasher before it
An improved common dasher before it
The embedded blueprint improves the common dasher with pitched oars. Marsh uses two perforated domes whose holes half overlap.
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Read US 7,527
Read US 7,527
"The convex pieces of tin, as shown at B and C, are or may be six inches in diameter, and the several holes in the same about three-quarters of an inch in diameter, the several holes in B made to cover about half of the several holes in C."
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Print the domes
Print the domes
Print the two domes (/uploads/blueprints/double-concave-perforated-disk-dasher-disk-a.stl and /uploads/blueprints/double-concave-perforated-disk-dasher-disk-b.stl): 152 mm across with 19 mm holes, the second turned so its holes half cover the first's. Print the spacer ring (/uploads/blueprints/double-concave-perforated-disk-dasher-ring.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Okùn PETG1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìtẹ̀ 3D oníwàyà (FDM)5
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Assemble
Assemble
Glue the two domes back to back on the spacer ring, convex sides out, holes half overlapping, and glue them on the foot of a 12 mm hardwood dowel staff.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àwọn dowel igi líle1 ẹyọ
Ẹpọ́ksì Ẹ̀yà Méjì1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ayùn Ọwọ́
Bébà Ìfá6
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The churn
The churn
Use a straight-sided food-grade container about 160 mm across and 300 mm tall, so the dasher fits closely without rubbing, as he said. Drill its lid for the staff.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àgọ́ ìtọ́jú ti ìpele oúnjẹ1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ Ìlùkòkò Aláìlókùn
Ìṣètò ayùn ihò7
7
The build in 3D
The build in 3D
FreeCAD model of this build, not of the patent: the straight-sided churn cut away to show the two perforated domes back to back on the staff, and a lever.
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Dash and make butter
Dash and make butter
Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Work the staff up and down; time until the butter comes. Pour off the buttermilk, add cold water, churn a little and pour off again until it runs clear; work in a pinch of salt and weigh the butter.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀rá wàrà tó nípọn2000 ml
Iyọ̀ Òkun Rúkèrúdò1 ẹyọ
Omi1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìwọ̀n ooru oníhun tí ó dúró sí inú
Aago Ìdúró
Òṣùwọ̀n Díjítà Ilé Ìdáná
Àwo ìdàpọ̀ ńlá ti irin tí kò ń yá9
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A dasher that sticks or splashes
A dasher that sticks or splashes
Double-concave disk dasher troubleshooting.
Flow
Loading...
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History and honest limits
History and honest limits
**Joseph Marsh** of Petersburg, Menard County, Illinois, received US 7,527, dated 30 July 1850. He wrote that it creates "a suction of atmosphere through the milk ... that excels any improvement in churns of ancient or modern invention"; that is his claim. His churn was straight inside "instead of cone-shaped." He claimed the double-concave perforated discoid churn-dasher.
**Honest limits.** Printed domes stand in for his tin. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.
Àwọn ohun-èlò
7- 1 ẹyọÀyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
- Àyè
- 2000 mlÀyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
Àwọn irinṣẹ́ tó nílò
9- Àyè
- Àyè
- 1 vendor sell this, none ship to you yetÀyè
- Àyè
Àwọn fáìlì àpẹrẹ
1Ìtọ́nisọ́nà yìí ń ṣe
Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
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CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.