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Ice-Drawer Butter Worker: An Ice Box Under the Tray, a Worker With Acute Edges
Lettie A. Smith, Pineville, Pennsylvania · Public domain (expired patent)
YourGrandma

Creado por

YourGrandma

6. octubre 2026IS
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Ice-Drawer Butter Worker: An Ice Box Under the Tray, a Worker With Acute Edges

Smith kept the butter cold while it was worked, with ice in a drawer under the tray. Lettie A. Smith of Pineville, Bucks County, Pennsylvania, received US 9,959, dated 23 August 1853, for the "Labor-Saving Butter-Worker": a tray hinged at its back on a frame, its front resting on a sliding carriage of two notched posts so it can stand flat or inclined; a cooling drawer under it "into which ice is placed for keeping the butter in a cool and nice state while being worked"; a working lever with one end playing in a circular opening in the frame, "formed with acute angles at the sides of its working face" to break or press the butter and turn it over; a spout for the water; and a hook for steelyards to weigh the butter. This rung works out the tray's slopes, then prints the worker, its socket, the notched posts and spout, builds the frame, and works butter.
Intermedio
About 4 hours, plus printing

Instrucciones

1

The tray's slope

Cargando el cuaderno de Jupyter…
2

Working butter before it

The embedded blueprint works the butter inside the churn, drawing it past fixed posts. Smith takes it out to a tray kept cold by an ice drawer, and works it by hand.
3

Read US 9,959

"The butter after being taken from the churn is placed in the tray or pan E, and there washed and worked up together in the usual manner by the worker H, until all the impurities are extracted and all the water expressed from the same; the water and all extraneous matter runs down the inclined bottom of the pan and escapes through the spout."
4

Print the parts

Print the worker head with its triangular working bar, ball end and handle socket, the ball plate with its round opening, two notched posts with their projections and the spout. Print the worker on its flat working face. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

Materiales para este paso:

Filamento PETGFilamento PETG1 pieza

Herramientas necesarias:

Impresora 3D de filamento (FDM)Impresora 3D de filamento (FDM)
5

Print the worker

The worker, printed as step 4 describes.
Archivo de DisenoSTLCC0 - Free
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6

Print the ball plate

The ball plate, printed as step 4 describes.
Archivo de DisenoSTLCC0 - Free
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7

Print the notched post

The notched post, printed as step 4 describes.
Archivo de DisenoSTLCC0 - Free
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8

Print the spout

The spout, printed as step 4 describes.
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9

Frame, tray and ice drawer

Build a pine frame about 320 by 220 mm and 260 mm high, with a cross bar across its front and runners below the top. Use a shallow rectangular food-grade container as the tray; hinge its back end to the frame, drill a 16 mm hole at that low end and seal the spout in it with food-safe silicone. Slide a roasting pan onto the runners under the tray as the ice drawer.

Materiales para este paso:

Tabla de pinoTabla de pino1 pieza
Recipiente de almacenaje de grado alimentarioRecipiente de almacenaje de grado alimentario1 pieza
Bisagra de libroBisagra de libro1 pieza
Sellador de siliconaSellador de silicona1 pieza
Fuente de asarFuente de asar1 pieza
Tornillo para madera n.º 8 x 1"Tornillo para madera n.º 8 x 1"1 pieza

Herramientas necesarias:

SerruchoSerrucho
Taladro inalámbricoTaladro inalámbrico
Juego de brocasJuego de brocas
Juego de coronas perforadorasJuego de coronas perforadoras
Juego de destornilladoresJuego de destornilladores
10

Posts, springs and worker

Hang the two notched posts on the front cross bar so the tray's front rests on their projections, and screw a strip of spring steel to the frame against each post to keep it in its notch. Screw the ball plate to the back of the frame above the tray's hinge, snap the worker's ball into it, and glue a 20 mm dowel into its socket as the handle, long enough to reach over the tray's front.

Materiales para este paso:

Fleje de acero para muellesFleje de acero para muelles1 pieza
Espigas de madera duraEspigas de madera dura1 pieza
Cola de carpinteroCola de carpintero1 pieza
Tornillo para madera n.º 8 x 1"Tornillo para madera n.º 8 x 1"1 pieza

Herramientas necesarias:

Sierra para metalesSierra para metales
Juego de destornilladoresJuego de destornilladores
Papel de lijaPapel de lija
11

The patent drawing

US 9,959 drawing sheet, public domain (expired patent).
Paso 11 - Image 1
12

Churn, then work the butter cold

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Churn 1 litre in any churn until the butter comes, and drain it. Fill the drawer with ice. Set the tray flat, put in the butter and cold water and press and turn it with the worker's edges; raise the tray's front a notch or two so the water runs out of the spout. Repeat with fresh water until it runs clear, work in a pinch of salt and weigh the butter.

Materiales para este paso:

Crema de leche espesaCrema de leche espesa1000 ml
Cubitos de hieloCubitos de hielo1 pieza
Sal marina gruesaSal marina gruesa1 pieza
AguaAgua1 pieza

Herramientas necesarias:

Termómetro de sonda permanenteTermómetro de sonda permanente
CronómetroCronómetro
Báscula digital de cocinaBáscula digital de cocina
Bol grande de acero inoxidableBol grande de acero inoxidable
13

Posts that slip, butter that smears

Ice-drawer butter worker troubleshooting.

Flow

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14

History and honest limits

**Lettie A. Smith** of Pineville, Bucks County, Pennsylvania, received US 9,959, dated 23 August 1853, for the "Labor-Saving Butter-Worker." The specification calls the tray both E and F, and E is also the cross bar the notches rest on. The claims are the cooling drawer or ice box G combined with the butter tray, and the working lever formed with acute angles at the sides of its working face; Smith did not claim the working lever with a tray in general. **Honest limits.** A container, a roasting pan, pine and printed parts stand in for the original; we weigh on a kitchen scale, not steelyards. FDM prints hold food in their layer lines, so wash well and replace when worn. Your weights are the result.

Materiales

14

Herramientas requeridas

12

Archivos de diseño

4

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