SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Valveless Cone Air Dasher: A Hollow Cone and Four Tubes, Nothing to Wear Out
Gridley wanted to force air under the cream "without the employment of valves or other movable parts in the dasher, which are liable to get out of order," and without a hollow handle.
Josiah A. Gridley of Southampton, Massachusetts, received US 6,411, dated 1 May 1849, for a churn-dasher of a straight round stick with a hollow cone on its lower end. Near the apex are four holes, more or less, through the cone; from them small tubes run down the outside to near its base, ending in open ends above the base. Forced into the cream, the cone traps air, which is drawn out through the tubes and disperses through the cream.
This rung works out the air the cone holds, then prints the cone with its tubes in one piece, fits it to a stick, and makes butter in a jar.
Mwanzo
About 1 hour, plus printing
Maagizo
1
1
Air in the cone
Air in the cone
Inapakia daftari la Jupyter…
2
2
A hollow dash that carries air down before it
A hollow dash that carries air down before it
The embedded blueprint traps air in a hollow cylinder and squeezes it out over a fixed block. Gridley's cone needs no block, spindle or valve.
3
3
Read US 6,411
Read US 6,411
"When this dasher is forced into the cream it incloses and compresses a quantity of air; and as the cream rushes up into it the air is drawn out through the tubes (a partial vacuum being created at their openings above the cone) and disperses through the cream, and agitates it as other air dashers. It is obvious that other figures than a cone would answer, and would be substantially the same thing."
4
4
Print the cone
Print the cone
Print the cone base-down in one piece: a hollow cone 90 mm across with four tubes from holes near its apex down the outside to just above its base, and a socket for the stick. Blow through each tube to check it is clear. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.
Vifaa kwa hatua hii:
Uzi wa PETG1 kipandeZana zinazohitajika:
Printa ya 3D ya nyuzi (FDM)5
5
Print the cone
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6
Fit the stick
Fit the stick
Glue a 12 mm hardwood dowel, as long as the jar is deep plus 150 mm, into the cone's socket.
Vifaa kwa hatua hii:
Vijiti vya mbao ngumu1 kipande
Gundi ya Mbao1 kipandeZana zinazohitajika:
Msumeno wa mkono
Sandarusi (karatasi ya kusugua)7
7
The churn
The churn
Take a tall wide jar about 170 mm across and drill its lid at the centre for the stick.
Vifaa kwa hatua hii:
Chupa ya Kioo1 kipandeZana zinazohitajika:
Kekee cha Betri
Seti ya vichimbuzi8
8
The build in 3D
The build in 3D
FreeCAD model of this build, not of the patent: the jar cut away to show the hollow cone on its stick with the four tubes from near its apex to just above its base.
9
9
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 1 litre. Work the stick up and down like a common dasher, lifting the cone clear of the cream each time so it fills with air; watch for bubbles from the tubes. 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.
Vifaa kwa hatua hii:
Malai nzito1000 ml
Chumvi ya Bahari Mbichi1 kipande
Maji1 kipandeZana zinazohitajika:
Kipima joto chenye kijiti kinachobaki ndani
Saa ya kupima muda
Mizani ya dijitali ya jikoni
Bakuli kubwa la kuchanganyia la chuma cha pua10
10
No bubbles, blocked tubes
No bubbles, blocked tubes
Valveless cone air dasher troubleshooting.
Flow
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11
History and honest limits
History and honest limits
**Josiah A. Gridley** of Southampton, Hampshire County, Massachusetts, received US 6,411, dated 1 May 1849. His cone was "of metal or other suitable material" and his handle "a straight round stick." He claimed the dasher made concave, with openings around it for dispersing air through the cream, without valves.
**Honest limits.** A printed cone stands in for his metal one, and a jar for his churn. The notebook's figures are estimates. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.
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Faili za muundo
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Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
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