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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.
Débutant
About 1 hour, plus printing
Consignes
1
1
Air per stroke
Air per stroke
Chargement du 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.
Matériaux pour cette étape :
Filament PETG1 pièceOutils nécessaires :
Imprimante 3D à filament (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.
Matériaux pour cette étape :
Bande de cuir1 pièce
Boulon de carrosserie1 pièce
Époxy à deux composants1 pièceOutils nécessaires :
Jeu de tournevis6
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.
Matériaux pour cette étape :
Tube PVC1 pièce
Goujons de bois dur1 pièce
Seau de 20 litres1 pièceÉpoxy à deux composants1 pièceOutils nécessaires :
Scie à métaux
Papier abrasif7
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.
Matériaux pour cette étape :
Crème liquide entière2000 ml
Gros sel marin1 pièce
Eau1 pièceOutils nécessaires :
Thermomètre à sonde à demeure
Chronomètre
Balance de cuisine numérique
Grand cul-de-poule en acier inoxydable9
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.
Matériaux
10- 1 pièceEspace réservé
- 1 pièceEspace réservé
- 1 pièceEspace réservé
- 2 piècesEspace réservé
- 1 pièceEspace réservé
- 1 pièceEspace réservé
- 1 pièceEspace réservé
- 2000 mlEspace réservé
- 1 pièceEspace réservé
- 1 pièceEspace réservé
Outils requis
8- Espace réservé
- Espace réservé
- Espace réservé
- Espace réservé
- Espace réservé
- Espace réservé
- Espace réservé
- Espace réservé
Fichiers de conception
1Blueprints liés
Ces blueprints partagent des connaissances — techniques, matériaux ou principes
Air-Pump Annular Dasher Churn: A Pump in the Middle, a Ring Dasher Round It
par Martin
NOURRITURE ET BOISSONS
8
0
0
0
0
0
Trapped-Air Cylinder Dash Churn: A Hollow Dash That Squeezes Air Into the Cream
par Emma
NOURRITURE ET BOISSONS
4
0
0
0
0
0
Valveless Cone Air Dasher: A Hollow Cone and Four Tubes, Nothing to Wear Out
par YourGrandma
NOURRITURE ET BOISSONS
4
0
0
0
0
0
CC0 Domaine public
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