LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
Piston-Float Air Churn: Hollow Floats With Pistons Worked by a Fixed Eccentric
D. N. Egbert, Hudson, Ohio · Public domain (expired patent)
Emma

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Emma

6. október 2026SE
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Piston-Float Air Churn: Hollow Floats With Pistons Worked by a Fixed Eccentric

Egbert wanted the air "forcibly discharged in small jets at the very point where it is most required, viz, the moving surface of the dasher." D. N. Egbert of Hudson, Ohio, received US 6,727, dated 18 September 1849, for a rotary churn-dasher in a case with a zinc bottom: two sets of arms joined by hollow floats whose sides are pierced with small holes, each fitted with a piston. Connecting rods join the pistons to an eccentric ring running on an eccentric fixed to the end piece, so each float fills with air as it ascends and discharges it as it descends. A strap from a large pulley on the crank shaft to a small one on the dasher's shaft turns it fast. This rung works out the air each float pumps, then prints the floats, pistons, eccentric and arms, builds them over a stainless bottom, and makes butter.
Lengra kominn
About 6 hours, plus printing

Leiðbeiningar

1

Air per float

Hleð Jupyter-vinnubók…
2

A dasher that is also an air pump before it

The embedded blueprint pumps air with a tube over a loose plunger. Egbert builds the pump into each float of a rotary dasher.
3

Read US 6,727

"It will now be perceived that as the floats ascend above their horizontal position by the revolution of the dasher, each piston is in turn withdrawn in its appropriate float and the hollow cavity filled with air; as the floats descend below their horizontal position this air is forcibly discharged through the perforations of the floats, below the surface of the liquid."
4

Print the parts

Print two hollow floats and two pistons, the fixed eccentric and its ring, two arm sets and the crank arm. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Efni fyrir þetta skref:

PETG-þráðurPETG-þráður1 stykki

Nauðsynleg verkfæri:

FDM-þrívíddarprentariFDM-þrívíddarprentari
5

Print the hollow float

The hollow float, printed as step 4 describes.
HönnunarskráSTLCC0 - Free
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6

Print the piston

The piston, printed as step 4 describes.
HönnunarskráSTLCC0 - Free
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7

Print the eccentric

The eccentric, printed as step 4 describes.
HönnunarskráSTLCC0 - Free
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8

Print the eccentric's ring

The eccentric's ring, printed as step 4 describes.
HönnunarskráSTLCC0 - Free
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9

Print the arm sets

The arm sets, printed as step 4 describes.
HönnunarskráSTLCC0 - Free
Sækja líkan
10

Print the crank arm

The crank arm, printed as step 4 describes.
HönnunarskráSTLCC0 - Free
Sækja líkan
11

The case

Make two plywood end pieces with a 90 mm radius half circle grooved in each, and bend a 0.5 mm stainless sheet into the bottom, seated in the grooves with silicone, as his zinc bottom. Screw the eccentric to the inside of one end on the axis, offset upward as printed.

Efni fyrir þetta skref:

KrossviðarplataKrossviðarplata1 stykki
Plata úr ryðfríu stáli - 304Plata úr ryðfríu stáli - 3041 stykki
SílikonþéttiefniSílikonþéttiefni1 stykki
Tréskrúfa #8 x 1"Tréskrúfa #8 x 1"1 stykki

Nauðsynleg verkfæri:

LaufsögLaufsög
PlötuklippurPlötuklippur
GratáhaldGratáhald
GúmmíhamarGúmmíhamar
SkrúfjárnasettSkrúfjárnasett
12

Dasher, pistons and rods

Slide the two arm sets onto a 10 mm square hardwood shaft and screw a float to the ends of each pair of arms, holes outward. Fit a piston in each float. Fit the ring over the eccentric and join each piston to the ring with two thin pine rods on M3 screws, so the ring is carried round by the arms. Pass the shaft through the other end and glue the crank arm and handle on.

Efni fyrir þetta skref:

HarðviðartapparHarðviðartappar1 stykki
FuruborðFuruborð1 stykki
VélskrúfurVélskrúfur1 stykki
SexkantróSexkantró1 stykki
TrélímTrélím1 stykki

Nauðsynleg verkfæri:

HandsögHandsög
HleðsluborHleðslubor
BorasettBorasett
SkrúfjárnasettSkrúfjárnasett
13

The patent drawing

US 6,727 drawing sheet, public domain (expired patent).
Skref 13 - Image 1
14

Crank and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 1.5 litres. Crank steadily and watch for jets of bubbles as each float goes 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.

Efni fyrir þetta skref:

RjómiRjómi1500 ml
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
15

Pistons that stick, no jets

Piston-float air churn troubleshooting.

Flow

Loading...
16

History and honest limits

**D. N. Egbert** of Hudson, Summit County, Ohio, received US 6,727, dated 18 September 1849. A tightening pulley on a spring lever kept the strap taut. He claimed the combination of the pistons moved by stationary eccentrics with the floats of a revolving dasher. **Honest limits.** Our crank turns the shaft directly, without his strap and pulleys; stainless sheet and printed parts stand in for his zinc and wooden floats. The notebook gives an upper bound. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

Efni

13

Nauðsynleg verkfæri

13

Hönnunarskrár

6

Þessi teikning býr til

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Tengd Blueprint

Þessi blueprint deila þekkingu — tækni, efni eða meginreglur

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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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