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Screw-Tube Egg Beater: The Tube Spins, the Rod Stands Still
A push-spinning egg beater turns on its point in the bowl: it wanders, and pressing on it slows it.
Walter Hart of Philadelphia received US 31,663, dated 12 March 1861, for an egg beater whose wire beaters are on a tube with a screw thread, spun by a nut slid up and down; inside it a rod fixed to the handle ends in a button that rests on the bottom of the vessel, so "the base ... is stationary and therefore has no tendency to slip" and the pressure is borne by the rod, leaving the tube free to turn.
This rung works out the tube's turns per stroke, then prints the lobed screw tube and nut, fits rod, button and beaters, and times a beating.
Iniciante
About 2 hours, plus printing
Instruções
1
1
Turns per stroke
Turns per stroke
A carregar o notebook Jupyter…
2
2
A spiral and slide before it
A spiral and slide before it
The embedded blueprint turns two scrolls with a slide on two spirals. Hart turns one screw tube and stands the whole beater on a still rod.
3
3
Read US 31,663
Read US 31,663
"In my improved egg beater the base, consisting of the button e, which rests on the bottom of the vessel, is stationary and therefore has no tendency to slip and as the pressure imparted to it is sustained by the stationary rod and not by the tube the latter is free to rotate under any pressure to which the instrument may be necessarily subjected."
4
4
Print the tube and nut
Print the tube and nut
Print the three-lobed screw tube (/uploads/blueprints/screw-tube-egg-beater-tube.stl) standing upright, and the nut (/uploads/blueprints/screw-tube-egg-beater-nut.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls.
Materiais para este passo:
Filamento PETG1 peçaFerramentas necessárias:
Impressora 3D de filamento (FDM)5
5
Bend the beaters
Bend the beaters
Bend three loops of stainless wire about 32 mm across and 45 mm high, and epoxy their ends round the tube's lower end.
Materiais para este passo:
Arame de aço inoxidável1 peça
Epóxi de dois componentes1 peçaFerramentas necessárias:
Alicate de bicos redondos
Alicate de bico chato6
6
Rod, button and handle
Rod, button and handle
Pass a 5 mm rod through the tube, with the nut on the tube. Epoxy a washer to the rod's foot as the button, leaving the tube 2 mm of play, and a hardwood handle on its top.
Materiais para este passo:
Varão de aço macio1 peça
Anilha plana1 peça
Cavilhas de madeira dura1 peçaEpóxi de dois componentes1 peçaFerramentas necessárias:
Serra de arco para metais
Torno de bancada
Berbequim sem fios
Jogo de brocas7
7
The patent drawing
The patent drawing
US 31,663 drawing sheet, public domain (expired patent).
8
8
Beat egg whites
Beat egg whites
Stand the button on the bowl's bottom, hold the handle, and slide the nut up and down; time two whites to stiff peaks. Note whether the button stays put.
Materiais para este passo:
Ovo2 peçasFerramentas necessárias:
Taça grande de aço inoxidável
Cronómetro9
9
A tube that sticks, a nut that binds
A tube that sticks, a nut that binds
Screw-tube egg beater troubleshooting.
Flow
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10
10
History and honest limits
History and honest limits
**Walter Hart** of Philadelphia received US 31,663, dated 12 March 1861. His thread is three wires coiled on the tube, their lower ends spread into the beaters; the nut is wood with a pin entering between the wires; a strip of metal lapped spirally may replace the wires. He did not claim the screw spindle, beaters and nut as such, which were known, but their combination with the internal rod and button.
**Honest limits.** FDM prints hold food in their layer lines, so wash well and replace when worn. A printed lobed tube stands in for his wire thread. Your times are the result.
Materiais
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Ferramentas necessárias
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