SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Spring-Return Rocking Churn: Springs Under Each End Lift the Low One Back
In a rocking churn the cream runs from end to end, and its weight makes each return stroke hard work.
Daniel F. Hitt of Galena, Illinois, received US 2,800, dated 7 October 1842, for a churn whose body rocks on gudgeons at its middle, with a spring under each end connected to the body by a strap, cord or chain. As the cream "runs from end to end of the containing vessel, it acquires a momentum"; "by means of the reaction of the springs, the momentum thus acquired is rendered available in obtaining the return motion." A perforated diaphragm across the middle lets the cream through on its way.
This rung estimates the spring force, then prints the diaphragm and gudgeon bosses, bows two spring-steel strips under a rocking box, and makes butter.
Kati
About 5 hours, plus printing
Maagizo
1
1
Cream's moment and spring force
Cream's moment and spring force
Inapakia daftari la Jupyter…
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2
A rocking churn before it
A rocking churn before it
The embedded blueprint rocks a churn on a stool. Hitt hangs his on gudgeons and adds springs to help it back.
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3
Read US 2,800
Read US 2,800
"I am aware that there is not any actual gain of power in the employment of springs in the manner designated, and they are not, therefore, used with any such view; but as the cream runs from end to end of the containing vessel, it acquires a momentum which would render the continuance of the rocking motion under the foregoing manner of suspending the containing vessel, one of much difficulty."
4
4
Print the parts
Print the parts
Print the perforated diaphragm flat, two diaphragm guides and two gudgeon bosses. 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 diaphragm
Print the diaphragm
The diaphragm, printed as step 4 describes.
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6
Print the diaphragm guide
Print the diaphragm guide
The diaphragm guide, printed as step 4 describes.
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7
Print the gudgeon boss
Print the gudgeon boss
The gudgeon boss, printed as step 4 describes.
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8
The rocking box
The rocking box
Take a food-safe box about 300 × 150 × 140 mm with a lid. Screw a guide inside each long side at the middle and slide the diaphragm into them, so it lifts out for washing as his did on buttons. Screw a gudgeon boss to the outside of each long side at the middle, and fit an M8 bolt through each as a gudgeon. Fix a dowel handle to one end.
Vifaa kwa hatua hii:
Chombo cha kuhifadhi cha daraja la chakula1 kipande
Skrubu za mashine1 kipande
Nati ya pembe sita1 kipande
Vijiti vya mbao ngumu1 kipande
Skrubu ya mti #8 x inchi 11 kipandeZana zinazohitajika:
Kekee cha Betri
Seti ya vichimbuzi
Seti ya bisibisi
Spana inayoweza kurekebishwa9
9
Frame, springs and cords
Frame, springs and cords
Build a pine base with two braced posts drilled for the gudgeons, so the box swings clear. Screw a spring-steel strip to the base under each end, bowed up so its tip stands just below the box when the box is level. Tie each tip to the box's end with a cord, leaving a little slack.
Vifaa kwa hatua hii:
Ubao wa msonobari1 kipande
Utepe wa chuma cha springi1 kipande
Kamba1 kipandeSkrubu ya mti #8 x inchi 11 kipande
Gundi ya Mbao1 kipandeZana zinazohitajika:
Msumeno wa mkonoKekee cha BetriSeti ya vichimbuziSeti ya bisibisi
Mkasi wa bati
Vibano10
10
The patent drawing
The patent drawing
US 2,800 drawing sheet, public domain (expired patent).
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11
Rock and make butter
Rock and make butter
Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 1 litre and fit the lid. Rock the box by its handle, letting the springs lift each end back; 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 pua12
12
A box that sticks down, springs that slap
A box that sticks down, springs that slap
Spring-return rocking churn troubleshooting.
Flow
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13
History and honest limits
History and honest limits
**Daniel F. Hitt** of Galena, Jo Daviess County, Illinois, received US 2,800, dated 7 October 1842. His body could be a trunk, box or cylinder; one end was removable, held "by wedges, screws, or otherwise"; the springs "may be varied in form, and may be made either of wood, or of metal." He did not claim the rocking churn or the suspension on gudgeons, both already used, but the manner of combining the springs with a churn that vibrates on gudgeons.
**Honest limits.** A food-safe box and spring-steel strips stand in for his body and springs. The notebook's moment is an estimate, not a measurement. 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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