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Double-Acting Swing Dash Churn: Two Dasher Strokes From Every Swing
The Davises doubled the work a swinging churn gets from each swing.
William F. Davis and Nathan Davis of Castleton, Vermont, received US 9,416, dated 23 November 1852, for "The Oscillating Double-Acting Dash-Churn": a tank hung in a pendulum frame between standards three and a half feet long; a connecting board pinned to one pendulum bar, slotted to slide on the rock shaft, carrying two pins that enter two opposite notches in a wheel fixed to the rock shaft; and a lever from the rock shaft to a hollow dash stick with a valve "for the purpose of preventing a vacuum underneath the dash."
This rung works out the strokes, then prints the notched wheel and connecting board, builds the frame and swing, and makes butter.
Ilọsíwájú
About 6 hours, plus printing
Ìlànà
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1
Strokes per minute
Strokes per minute
Ń ṣí ìwé Jupyter…
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The swing churn it doubles
The swing churn it doubles
The embedded blueprint gives one dasher stroke per swing through a bent lever. The Davises' notched wheel and two-pinned board give two.
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Read US 9,416
Read US 9,416
"As the swing moves from the center toward the left and back the upper pin leaves the upper notch and the lower pin enters its respective notch, producing substantially the same result as when the upper pin entered the upper notch and passed toward the right and back. Thus we produce two complete motions of the dash from one full oscillation of the pendulum bars."
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Print the parts
Print the parts
Print the notched wheel (/uploads/blueprints/double-acting-swing-dash-churn-notched-wheel.stl) and the connecting board with its slot and two pins (/uploads/blueprints/double-acting-swing-dash-churn-connecting-board.stl). Reuse the dasher and valve plug from the pendulum swing dash churn if you have them. 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
5
Frame and swing
Frame and swing
Build two pine A-frames about 520 mm tall joined at the top, with diagonal cross pieces carrying the rock shaft, and hang a swing of two pine bars and a plywood board from a rod at the top. Stand a straight-sided food-grade container on the board as the tank.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Pákó igi pine1 ẹyọ
Àwo igi tí a lẹ̀ pọ̀1 ẹyọ
Ọ̀pá Róbótó Irin Rírọ̀1 ẹyọ
Àgọ́ ìtọ́jú ti ìpele oúnjẹ1 ẹyọ
Ìsúrù igi #8 x 1"1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ayùn Ọwọ́
Ẹ̀rọ Ìlùkòkò Aláìlókùn
Àkójọ Orí Ìlùkòkò
Ìṣù àwọn ohun ìyí skurú6
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Wheel, board, lever and dash
Wheel, board, lever and dash
Fix the notched wheel on a 12 mm steel rock shaft. Pin the connecting board to one swing bar, its slot over the shaft, so its pins meet the notches. Fix a pine lever to the rock shaft and pin its end to a hollow 18 mm food-grade tube dash stick with a leather flap valve near its top and a perforated dasher at its foot.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀pá Róbótó Irin Rírọ̀1 ẹyọPákó igi pine1 ẹyọ
Páìpù PVC1 ẹyọ
Tẹ́ẹ́rẹ́ awọ1 ẹyọ
Skurú ẹ̀rọ1 ẹyọ
Nọ́ọ̀tì Onígun Mẹ́fà1 ẹyọ
Ẹpọ́ksì Ẹ̀yà Méjì1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ayùn IrinẸ̀rọ Ìlùkòkò AláìlókùnÀkójọ Orí Ìlùkòkò
Kọ́kọ́rọ́ tí a lè ṣàtúnṣe7
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The patent drawing
The patent drawing
US 9,416, drawing sheet, public domain (expired patent).
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Swing and make butter
Swing and make butter
Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Swing the tank steadily; the dasher strokes twice each full swing. 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
9
Pins that miss, a dash that sticks
Pins that miss, a dash that sticks
Double-acting swing dash troubleshooting.
Flow
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History and honest limits
History and honest limits
**William F. Davis and Nathan Davis** of Castleton, Rutland County, Vermont, received US 9,416, dated 23 November 1852. Their standards were 2 by 1 inches, 3½ feet long, spread three feet at the bottom, pairs 15 inches apart; the swing board was 13 by 14 inches; the dash stick's hole was ⅝ inch. They claimed the combination of the swing, slotted board, wheel, rock shaft and lever producing two motions of the dash from one oscillation.
**Honest limits.** A smaller frame, a container and printed parts stand in for theirs; their swing length is estimated. 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
14- 1 ẹyọÀyè
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- 1 ẹyọÀyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
- 2000 mlÀyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
Àwọn irinṣẹ́ tó nílò
11- Àyè
- 1 vendor sell this, none ship to you yetÀyè
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- Àyè
Ìtọ́nisọ́nà yìí ń ṣe
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