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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.
Intermediário
About 5 hours
Instruções
1
1
Paint the brush needs
Paint the brush needs
A carregar o notebook Jupyter…
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2
A turned perforated tube before it
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.
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3
Read US 842,644
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."
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4
Fold the tank
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.
Materiais para este passo:
Chapa de alumínio1 peça
Rebites cegos1 peça
Vedante de silicone1 peçaFerramentas necessárias:
Tesoura de chapa
Alicate de bico chato
Torno de bancada
Kit de rebitadora
Berbequim sem fios
Jogo de brocas
Conjunto de serras-copo
Luvas de trabalho em couro5
5
Drill the floor
Drill the floor
Drill six 3 mm holes along the floor's centre line, 20 mm apart.
Ferramentas necessárias:
Berbequim sem fiosJogo de brocas
Marcador permanente
Régua6
6
Make the turning valve
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.
Materiais para este passo:
Tubo de cobre de 10 mm1 peçaFerramentas necessárias:
Serra de arco para metaisBerbequim sem fiosJogo de brocas
Limas (lima de mão)Torno de bancada7
7
Fold the hood
Fold the hood
Bend an aluminium strip into a ridge with 40° sides and rivet it under the floor, its peak under the holes.
Materiais para este passo:
Chapa de alumínio1 peçaRebites cegos1 peçaFerramentas necessárias:
Torno de bancadaKit de rebitadora8
8
Clamp on the brush
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.
Materiais para este passo:
Conjunto de pincéis1 peça
Sortido de parafusos sextavados1 peça
Porca sextavada1 peça
Anilha plana1 peçaRebites cegos1 peçaFerramentas necessárias:
Berbequim sem fiosJogo de brocas
Chave inglesa ajustável9
9
The patent drawing
The patent drawing
US 842,644 drawing sheet, public domain (expired patent).
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10
Paint and weigh
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.
Materiais para este passo:
Conjunto de tintas acrílicas1 peça
Água1 peça
Placa de contraplacado1 peçaFerramentas necessárias:
Balança digital de cozinha
Fita métrica
Cronómetro11
11
A brush that clogs, floods or paints one side
A brush that clogs, floods or paints one side
Hooded fountain paint brush troubleshooting.
Flow
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12
History and honest limits
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.
Materiais
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Ferramentas necessárias
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