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The Hooded Fountain Paint Brush: A Dome Shares the Paint Between Both Sides
Franklin E. Fornwalt, Harrisburg, Pennsylvania · Public domain (expired patent)
Martin

Creado por

Martin

6. octubre 2026NO
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The Hooded Fountain Paint Brush: A Dome Shares the Paint Between Both Sides

Paint fed into the middle of a brush clogs its head, and one side of the bristles runs dry. Franklin E. Fornwalt of Harrisburg, Pennsylvania, received US 842,644, patented 29 January 1907, for a fountain brush "for applying paint": a tin holder clamped over the brush carries a reservoir whose floor has a row of apertures under a hollow turning valve, and below it a hood whose dome sends equal paint to both sides of the bristles. This rung works out the flow a brush needs, then folds the holder from aluminium sheet over a 120 mm brush and measures the paint it lays on each side of a stroke.
Intermedio
About 5 hours

Instrucciones

1

Paint the brush needs

Cargando el cuaderno de Jupyter…
2

A turned perforated tube before it

The embedded blueprint turns a perforated tube to change how water leaves a brush. Fornwalt turns a perforated valve to open or close a row of holes over a hood.
3

Read US 842,644

"In virtue of the provision of the said hood D paint is effectually prevented from getting on the brush-head b, and at the same time liability of the brush becoming choked and impaired is reduced to a minimum. It will also be apparent that the hood D conveys an equal quantity of paint to each side of the body of bristles a and assures the paint reaching the sides of the body of bristles in the form of thin layers, which obviously contributes materially to the efficiency of the fountain-brush as a whole."
4

Fold the tank

Fold aluminium sheet into a box 160 × 60 × 70 mm with a lid. Rivet the seams and seal them inside with silicone. Cut a 25 mm filling hole in the lid.

Materiales para este paso:

Chapa de aluminioChapa de aluminio1 pieza
Remaches ciegosRemaches ciegos1 pieza
Sellador de siliconaSellador de silicona1 pieza

Herramientas necesarias:

Tijeras de chapaTijeras de chapa
Alicates de boca planaAlicates de boca plana
Tornillo de bancoTornillo de banco
Kit de remachadoraKit de remachadora
Taladro inalámbricoTaladro inalámbrico
Juego de brocasJuego de brocas
Juego de coronas perforadorasJuego de coronas perforadoras
Guantes de trabajo de cueroGuantes de trabajo de cuero
5

Drill the floor

Drill six 3 mm holes along the floor's centre line, 20 mm apart.

Herramientas necesarias:

Taladro inalámbricoTaladro inalámbrico
Juego de brocasJuego de brocas
Rotulador permanenteRotulador permanente
ReglaRegla
6

Make the turning valve

Cut 200 mm of 10 mm copper tube. Drill six 3 mm holes in a line to match the floor's, and file a 6 mm slot along the opposite side. Pass it through both end walls just above the floor and bend one end into a crank.

Materiales para este paso:

Tubo de cobreTubo de cobre1 pieza

Herramientas necesarias:

Sierra para metalesSierra para metales
Taladro inalámbricoTaladro inalámbrico
Juego de brocasJuego de brocas
Limas (lima de mano)Limas (lima de mano)
Tornillo de bancoTornillo de banco
7

Fold the hood

Bend an aluminium strip into a ridge with 40° sides and rivet it under the floor, its peak under the holes.

Materiales para este paso:

Chapa de aluminioChapa de aluminio1 pieza
Remaches ciegosRemaches ciegos1 pieza

Herramientas necesarias:

Tornillo de bancoTornillo de banco
Kit de remachadoraKit de remachadora
8

Clamp on the brush

Rivet two side skirts below the tank. Drill them and a 120 mm brush's stock for two M6 bolts, and clamp the brush between the skirts with nuts so their lower edges rest on the bristles.

Materiales para este paso:

Surtido de tornillos hexagonalesSurtido de tornillos hexagonales1 pieza
Tuerca hexagonalTuerca hexagonal1 pieza
Arandela planaArandela plana1 pieza
Remaches ciegosRemaches ciegos1 pieza

Herramientas necesarias:

Taladro inalámbricoTaladro inalámbrico
Juego de brocasJuego de brocas
Llave inglesa ajustableLlave inglesa ajustable
Juego de pincelesJuego de pinceles
9

The patent drawing

US 842,644 drawing sheet, public domain (expired patent).
Paso 9 - Image 1
10

Paint and weigh

Fill the tank with thinned acrylic paint. Weigh a plywood board, open the valve half, and paint one 1 m stroke each way. Weigh it again; compare how wet each side of the bristles is.
Paso 10 - Image 1

Materiales para este paso:

Juego de pintura acrílicaJuego de pintura acrílica1 pieza
AguaAgua1 pieza
Tablero contrachapadoTablero contrachapado1 pieza

Herramientas necesarias:

Báscula digital de cocinaBáscula digital de cocina
Cinta métricaCinta métrica
CronómetroCronómetro
11

A brush that clogs, floods or paints one side

Hooded fountain paint brush troubleshooting.

Flow

Loading...
12

History and honest limits

**Franklin E. Fornwalt** of Harrisburg, Pennsylvania, filed US 842,644 on 28 September 1906; it was patented 29 January 1907. His holder is preferably tin; bolts through the brush head with thumb nuts press the side walls in against the bristles, and removing them lets the brush be replaced. A connection may take a hose from a paint supply or compressed air. A right-angled form paints vertical surfaces, feeding the upper side of the bristles only. **Honest limits.** Riveted aluminium stands in for his tin, and plain nuts for his thumb nuts. Your weights are the result.

Materiales

10

Herramientas requeridas

17

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