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Oscillating-Pump Churn: A Half-Round Vane Pump Lifts the Cream Over and Strains It Back Through a Partition
W. H. McClintock of Frankfort, Ohio, received US 24,223, dated 31 May 1859, for a churn that is a pump. A box is divided by a perforated partition into a cream chamber and a butter chamber. In the cream chamber a half-round pump has a vane swung back and forth by a lever: each stroke sucks cream up through a passage round the pump and flap valves into one side, and forces the other side's cream up through valves on top into a channel that runs into the butter chamber. The cream strains back through the partition and goes round again, chafed at every pass, until the butter is left in the butter chamber. Pumping water round the same way rinses the churn and washes the butter.
This rung builds it in a pine box with a printed pump.
Juu
About 1 day, plus printing
Maagizo
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1
What one stroke moves
What one stroke moves
Inapakia daftari la Jupyter…
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2
Cream thrown over a partition, before it
Cream thrown over a partition, before it
Patterson's fan threw cream over a partition to return under it. McClintock pumps it over and strains it back.
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Read US 24,223
Read US 24,223
"The cream first expelled flows into the chamber C, and by reason of the continued suction of the piston is caused to strain through the perforated partition D, and enter the cream or milk chamber again ready to be again similarly circulated, minus a greater portion of its fatty matter, said fatty matter remaining in the chamber C."
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Print the pump E
Print the pump E
The pump body: half-round chamber a, passage b round it with its inlet below, ports for valves c c'. Print it upside down on its flat top. PETG, 0.2 mm layers, 40 % infill, 4 walls; wash before first use.
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5
Print the vane f
Print the vane f
The piston vane with its half-round hub. PETG, 0.2 mm layers, 40 % infill, 4 walls; wash before first use.
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6
Box A and partition D
Box A and partition D
From 18 mm pine make a box 500 x 220 mm and 300 mm deep inside, with a lid and knob. Screw pairs of 10 mm strips down both side walls 300 mm from the left end as grooves, and slide in a 12 mm plywood partition D 212 mm high, drilled all over with 8 mm holes 20 mm apart, with a knob to lift it. Fit a PVC spigot low in the right end, in chamber C, as the opening j.
Vifaa kwa hatua hii:
Ubao wa msonobari3 vipande
Gundi ya Mbao1 kipande
Parafujo za mbao40 vipande
Ubao wa Mti Mgumu1 kipande
Bati la mbao za kubandika1 kipande
Vijiti vya mbao ngumu1 kipande
Bomba dogo la PVC1 kipande
Kizibo cha Silikoni1 kipandeZana zinazohitajika:
Msumeno wa mkono
Msumeno wa Kupinda
Kekee cha Betri
Seti ya vichimbuzi
Seti ya misumeno ya duara
Vibano
Sandarusi (karatasi ya kusugua)
Seti ya bisibisi
Tepi ya kupimia7
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Pump E and top plate
Pump E and top plate
Cut a 12 mm plywood top plate 290 x 220 mm to fill chamber B from the left end to the partition. Cut a half-round groove across its underside for the vane's hub, 37 mm wide, centred 150 mm from the left end, and drill two 20 mm eduction holes d d' 50 mm each side of it. Glue rubber-sheet flaps e e' 32 mm square over them on top, hinged on one edge with a screw. Glue rubber flaps c c' over the two ports inside the pump's chamber, hinged at the top so they open inward. Screw the pump body under the plate, seal the joint with silicone, and rest the plate on cleats 200 mm above the floor so it closes chamber B.
Vifaa kwa hatua hii:
Uzi wa PETG1 kipandeBati la mbao za kubandika1 kipande
Bati la mpira1 kipandeKizibo cha Silikoni1 kipandeParafujo za mbao12 vipandeUbao wa msonobari1 kipandeZana zinazohitajika:
Printa ya 3D ya nyuzi (FDM)Msumeno wa KupindaSeti ya misumeno ya duara
Kisu cha kaziKekee cha BetriSeti ya bisibisi8
8
Vane f, lever g and channel F
Vane f, lever g and channel F
Fix the vane on a 12 mm stainless rod with an M4 screw across, set it in the chamber with the hub in the plate's groove, and pass the rod out through the pump's end and the box's near wall. Fix a hardwood lever g 24 x 12 mm, 245 mm long, on the rod outside, standing up past the lid, with a 28 mm dowel handle on top. Fix a pine board above the top plate, sloping down from 258 mm high at the left end to 238 mm over the partition, to form channel F into C.
Vifaa kwa hatua hii:
Fimbo ya chuma cha pua1 kipande
Skrubu za mashine1 kipande
Nati ya Kufungasha yenye Nailoni1 kipandeUbao wa Mti Mgumu1 kipandeVijiti vya mbao ngumu1 kipandeGundi ya Mbao1 kipandeUbao wa msonobari1 kipandeParafujo za mbao8 vipandeZana zinazohitajika:
Msumeno wa chumaMsumeno wa mkonoKekee cha BetriSeti ya vichimbuziSeti ya bisibisi9
9
The build in 3D
The build in 3D
FreeCAD model of this build, the near half cut away: box A with partition D in its grooves, the pump body with passage b and its inlet, the vane, the top plate with flaps e e', flaps c c' at the ports, channel F's board and the spigot. It was checked at five vane angles from -60 to +60 degrees.
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10
Churn
Churn
Pour about 8 litres of heavy cream at about 15 °C into chamber B through C (it strains through the partition), checked with the thermometer, and put the lid on. Swing the lever steadily back and forth about 60 degrees each way and time it: cream spurts into channel F, runs into C and strains back. When the butter has gathered in C, draw off the buttermilk at the spigot, pour cold water in and pump it round to rinse the churn and wash the butter, then lift the butter out, work in a pinch of salt and weigh it.
Vifaa kwa hatua hii:
Malai nzito8 l
Maji1 kipande
Chumvi ya Bahari Mbichi1 kipandeZana zinazohitajika:
Kipima joto chenye kijiti kinachobaki ndani
Saa ya kupima muda
Mizani ya dijitali ya jikoni
Bakuli kubwa la kuchanganyia la chuma cha pua11
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Troubleshooting
Troubleshooting
Pump churn troubleshooting.
Flow
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History and honest limits
History and honest limits
**W. H. McClintock** of Frankfort, Ross County, Ohio, US 24,223, 31 May 1859, "Churn". He claimed the circularly vibrating suction and force pump with a churn having a perforated partition. He gave no sizes or materials: the box, the printed pump, the rubber flaps and every size are ours.
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