LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI

Rotary-Dasher Box Churn: Float Boards on Crossed Arms in a Curved Box
An up-and-down dash churn is slow, tiring work.
Rufus Porter of Billerica, Massachusetts, received US 735, dated 10 May 1838, for a churn: a box eighteen inches long with a bottom curved from end to end; a wooden shaft running between a hollow cone and a pointed centre screw; two parallel pairs of rods through the shaft at right angles, carrying float boards parallel with the shaft — "what is termed the rotary dasher" — turned by a crank whose twisted tenon is pressed into the shaft and comes out when the occasion requires.
This rung compares his churn's sweep with a tabletop one, then prints the dasher, builds the box, and makes butter.
Miðlungs
About 5 hours, plus printing
Leiðbeiningar
1
1
Butter yield and sweep
Butter yield and sweep
Hleð Jupyter-vinnubók…
2
2
A board pushed through liquid before it
A board pushed through liquid before it
The embedded blueprint drives a boat with a flat paddle. Porter's float boards push through cream the same way, turning on a shaft.
3
3
Read US 735
Read US 735
"Four round bars or rods, sixteen inches long and one inch in diameter, pass through the shaft; two of these rods are parallel, and about five inches apart, each being one inch from one end of the shaft. The other two are parallel to each other, but at right angles with the first pair, and three inches apart; the four bars thus constituting eight arms."
4
4
Print the dasher
Print the dasher
Print the rotary dasher: core, two parallel pairs of arms at right angles, and four float boards. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.
Efni fyrir þetta skref:
PETG-þráður1 stykkiNauðsynleg verkfæri:
FDM-þrívíddarprentari5
5
Print the dasher
6
6
Use a box with a curved bottom
Use a box with a curved bottom
Take a food-safe storage box about 150 × 100 mm and 150 mm deep. Drill both ends on the dasher's axis, 85 mm up. Bed a plywood strip curved from end to end in its floor with silicone, as his curved bottom.
Efni fyrir þetta skref:
HDPE-geymsluílát1 stykki
Krossviðarplata1 stykkiNauðsynleg verkfæri:
Laufsög
Hleðslubor
Borasett7
7
Cone, centre screw and crank
Cone, centre screw and crank
File an M5 screw to a point and run it through one end as the centre screw into the dasher's end hole. Through the other end pass a 5 mm rod into the dasher's seat as the hollow-cone bearing, bent outside into a crank.
Efni fyrir þetta skref:
Vélskrúfur1 stykki
Sexkantró1 stykki
Kringlótt stöng úr deigu stáli1 stykkiNauðsynleg verkfæri:
Þjalir (handþjöl)
Skrúfstykki
Skiptilykill8
8
The patent drawing
The patent drawing
US 735 drawing sheet, public domain (expired patent).

9
9
Make butter
Make butter
Let 500 ml of heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour it into the box, close the lid, and crank steadily; time until the butter comes. Pour off the buttermilk, add cold water, churn a few turns and pour off again until it runs clear; work in a pinch of salt and weigh the butter.

Efni fyrir þetta skref:
Rjómi500 ml
Gróft sjávarsalt1 stykki
Vatn1 stykkiNauðsynleg verkfæri:
Hitamælir með nema sem situr í
Skeiðklukka
Stafræn eldhúsvog
Stór hrærskál úr ryðfríu stáli10
10
A dasher that sticks, a box that leaks
A dasher that sticks, a box that leaks
Rotary-dasher box churn troubleshooting.
Flow
Loading...
11
11
History and honest limits
History and honest limits
**Rufus Porter** of Billerica, Massachusetts, received US 735, dated 10 May 1838. His box is eighteen inches long, ten wide and eighteen deep, of boards three-quarters of an inch thick; the bottom, three-eighths thick, is curved so its centre is three inches lower than its ends; a lid with ventilation apertures fits a rabbet; the float boards are eight inches long and three wide. He gave the dimensions of every part.
**Honest limits.** A storage box and a printed dasher at tabletop scale stand in for his. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.
Efni
10- 1 stykkiStaðgengill
- 1 stykkiStaðgengill
- 1 stykkiStaðgengill
- 1 stykkiStaðgengill
- 1 stykkiStaðgengill
- 1 stykkiStaðgengill
- 1 stykkiStaðgengill
- 500 mlStaðgengill
- 1 stykkiStaðgengill
- 1 stykkiStaðgengill
Nauðsynleg verkfæri
11- Staðgengill
- Staðgengill
- Hleðslubor3% þóknunMagento Legacy Storeships internationallyStaðgengill
- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
Hönnunarskrár
1Þessi teikning býr til
Tengd Blueprint
Þessi blueprint deila þekkingu — tækni, efni eða meginreglur

Churning Butter from Cream — The 5,000-Year-Old Fat Separation
eftir TheChef
HANDVERK
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Carving a Wooden Paddle from a Single Piece of Hardwood — Prehistoric Watercraft Propulsion
eftir Woody
Trésmiði
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1
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Making Aged Farmhouse Cheese in a Cheese Press — Medieval Dairy Craft
eftir TheChef
Matur
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CC0 opinbert ríki
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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.
