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INDOSSABILI
Air-Pump Tube Dasher: A Tube Over a Loose Plunger Pumps Air at Every Stroke
Wright wanted a hand dasher that "will operate as an air pump to force a stream of air into the cream at the same time that it agitates it."
William M. Wright of Pittsburgh, Pennsylvania, received US 6,711, dated 11 September 1849, for an atmospheric churn-dasher: a tube of tinned sheet iron with a flange on its lower end, a cap with a valve opening inward, and a handle; inside, a loose cylinder of wood weighted at its lower end rests on the bottom of the tub as a plunger. Worked like a common dasher in "almost any ordinary pail or dairy vessel," it discharges air among the cream on each descent and refills on each ascent.
This rung works out the air per stroke, then prints the cap, flange and plunger, assembles them on a pipe, and makes butter in a pail.
Principiante
About 1 hour, plus printing
Istruzioni
1
1
Air per stroke
Air per stroke
Caricamento del notebook Jupyter…
2
2
A dash closing over a fixed block before it
A dash closing over a fixed block before it
The embedded blueprint squeezes air from a hollow dash over a block fixed to the churn. Wright's plunger is loose, so it needs no fixing at all.
3
3
Read US 6,711
Read US 6,711
"From the fact of the piston resting loosely upon the bottom of the tub, and being capable of moving about and occupying a vertical or inclined position as may best suit the convenience of the operator, and also from the facility with which it and the dasher may be removed from the churn tub and cleaned, and from the simplicity of all the parts being a guarantee against their getting out of order, this apparatus is applicable to churning cream in either large or small quantities."
4
4
Print the parts
Print the parts
Print the cap (/uploads/blueprints/air-pump-tube-dasher-cap.stl) with its side valve port and handle socket, the foot flange (/uploads/blueprints/air-pump-tube-dasher-flange.stl), and the plunger (/uploads/blueprints/air-pump-tube-dasher-plunger.stl), whose foot has a pocket for a steel weight. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.
Materiali per questo passaggio:
Filamento PETG1 pezzoStrumenti necessari:
Stampante 3D a filamento (FDM)5
5
Valve and weight
Valve and weight
Glue a small leather flap inside the cap over the valve port, along its top edge only, so air enters and cannot leave. Glue an M10 carriage bolt into the plunger's pocket, so it sinks in cream as he weighted his with metal.
Materiali per questo passaggio:
Striscia di pelle1 pezzo
Bullone a testa tonda e collo quadro1 pezzo
Resina epossidica bicomponente1 pezzoStrumenti necessari:
Set di cacciaviti6
6
Assemble
Assemble
Cut 300 mm of 50 mm pipe. Push the flange onto its foot and the cap onto its top, and glue a hardwood dowel handle in the cap's socket. Stand the plunger in a tall food-grade bucket and lower the tube over it.
Materiali per questo passaggio:
Tubo in PVC1 pezzo
Tasselli di legno duro1 pezzo
Secchio da 20 litri1 pezzoResina epossidica bicomponente1 pezzoStrumenti necessari:
Seghetto per metalli
Carta abrasiva7
7
The build in 3D
The build in 3D
FreeCAD model of this build, not of the patent: the pail, tube and flange cut away to show the loose weighted plunger standing on the bottom inside the tube, the cap with its valve, and the handle.
8
8
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 2 litres. Work the tube up and down over the plunger; bubbles should burst from under the flange on each down-stroke. 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.
Materiali per questo passaggio:
Panna da montare2000 ml
Sale marino grosso1 pezzo
Acqua1 pezzoStrumenti necessari:
Termometro a sonda permanente
Cronometro
Bilancia digitale da cucina
Grande ciotola da impasto in acciaio inossidabile9
9
No bubbles, a plunger that floats
No bubbles, a plunger that floats
Air-pump tube dasher troubleshooting.
Flow
Loading...
10
10
History and honest limits
History and honest limits
**William M. Wright** of Pittsburgh, Allegheny County, Pennsylvania, received US 6,711, dated 11 September 1849. The plunger was to be "specifically heavier than cream," or wood weighted with a plug of metal; the tub could be any pail, "particularly, if it be deep in comparison with its width." He claimed the combination of the loose plunger with the tubular dasher.
**Honest limits.** A pipe and printed parts stand in for his tinned sheet-iron tube; use a food-grade pipe. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.
Materiali
10- 1 pezzoSegnaposto
- 1 pezzoSegnaposto
- Segnaposto
- Segnaposto
- 1 pezzoSegnaposto
- 1 pezzoSegnaposto
- 1 pezzoSegnaposto
- 2000 mlSegnaposto
- 1 pezzoSegnaposto
- 1 pezzoSegnaposto
Strumenti richiesti
8- Segnaposto
- Segnaposto
- Segnaposto
- Segnaposto
- Segnaposto
- Segnaposto
- Segnaposto
File di progetto
1Questo progetto realizza
Blueprint correlati
Questi blueprint condividono conoscenze — tecniche, materiali o principi
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