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ENTRETENIMENTO
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TECNOLOGIA VESTÍVEL
Rack-and-Pinion Rolling Beater Churn: Beaters That Turn One Way Up, the Other Way Down
Livingston wanted a deep, narrow churn in which every part of the cream is worked.
Norman B. Livingston of Portland, Indiana, received US 9,097, dated 6 July 1852, for a churn in which "a vertical rack (b) and groove (c) on each of two opposite sides of the box, receive pinions (d) on the two ends of a shaft (e) from which project wings or beaters (f)." A rod from a handle raises and lowers the shaft, and the beaters revolve "in one direction when going up and in the opposite direction when going down." He held a deep box made firmer, yellower butter than shallow vessels; that is his observation.
This rung works out the turn per stroke, then prints the wing hub, pinions and racks, fits them in a deep box, and makes butter.
Intermediário
About 4 hours, plus printing
Instruções
1
1
Turn per stroke
Turn per stroke
A carregar o notebook Jupyter…
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2
A dasher that turns as it rises and falls before it
A dasher that turns as it rises and falls before it
The embedded blueprint turns an upright dasher with a pin in a spiral slot. Livingston turns a horizontal beater shaft with pinions on racks.
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3
Read US 9,097
Read US 9,097
"The motion of the handle up and down, causes the shaft (e) and beaters (f), to ascend and descend in the groove (c), and the pinions (d) working at the same time in the racks (b), the beaters are thereby caused to revolve in one direction when going up and in the opposite direction when going down, so that both the vertical and the rotary movements, are reversed at every stroke."
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4
Print the parts
Print the parts
Print the wing hub (/uploads/blueprints/rack-and-pinion-rolling-beater-churn-wing-hub.stl), two 14-tooth pinions (/uploads/blueprints/rack-and-pinion-rolling-beater-churn-pinion.stl) and two racks with their grooves (/uploads/blueprints/rack-and-pinion-rolling-beater-churn-rack-and-groove.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.
Materiais para este passo:
Filamento PETG1 peçaFerramentas necessárias:
Impressora 3D de filamento (FDM)5
5
The deep box
The deep box
Take a deep, narrow food-safe box about 130 × 120 × 260 mm. Glue a rack upright on each of two opposite inside walls, directly facing each other, teeth the same way.
Materiais para este passo:
Recipiente de armazenamento de grau alimentar1 peça
Epóxi de dois componentes1 peçaFerramentas necessárias:
Grampos
Fita métrica6
6
Shaft, rod and lever
Shaft, rod and lever
Pass a 10 mm square hardwood shaft through the hub and fix a pinion on each end so each meshes its rack, the shaft's ends riding in the grooves. Pivot a steel rod on the shaft's middle, and its top on a pine hand lever pivoted on a post at the box's end.
Materiais para este passo:
Cavilhas de madeira dura1 peça
Varão de aço macio1 peça
Tábua de pinho1 peça
Parafusos de máquina1 peça
Porca sextavada1 peça
Parafuso para madeira n.º 8 x 1"1 peçaFerramentas necessárias:
Serrote
Serra de arco para metais
Berbequim sem fios
Conjunto de chaves de fendas7
7
The patent drawing
The patent drawing
US 9,097 drawing sheet, public domain (expired patent).
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8
Work the lever and make butter
Work the lever and make butter
Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Work the lever up and down; the beaters roll one way and 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.
Materiais para este passo:
Natas para bater2000 ml
Sal marinho grosso1 peça
Água1 peçaFerramentas necessárias:
Termómetro de sonda permanente
Cronómetro
Balança digital de cozinha
Taça grande de aço inoxidável9
9
Pinions that skip, a shaft that tilts
Pinions that skip, a shaft that tilts
Rack-and-pinion beater troubleshooting.
Flow
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10
History and honest limits
History and honest limits
**Norman B. Livingston** of Portland, Fountain County, Indiana, received US 9,097, dated 6 July 1852. He claimed the racks, grooves and pinions by which the shaft and beaters traverse the cream with a compound vertical revolving and reciprocating motion.
**Honest limits.** A food-safe box and printed gears stand in for his. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.
Materiais
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Ferramentas necessárias
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