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The Pressure-Fed Fountain Paint Brush: Air Pushes the Paint, a Finger Stops It
Gottfried Meyer and Charles G. Braun, Philadelphia, Pennsylvania · Public domain (expired patent)
Emma

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Emma

6. Oktoba 2026SE
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The Pressure-Fed Fountain Paint Brush: Air Pushes the Paint, a Finger Stops It

Painting from a pot means stopping every few strokes to reload the brush. Gottfried Meyer and Charles G. Braun of Philadelphia received US 821,879, patented 29 May 1906, for a fountain paint brush: a reservoir pressurised through an air pipe with a check valve sends paint along a hose to a tube in a recess of the brush head and out through a flattened flexible web among the bristles; a spring holds a plunger open, and the forefinger pushes its knob to cut the paint off. This rung works out how paint thickness and pressure set the flow, then builds the tank from a bottle and a tyre valve, feeds a brush, and measures the flow.
Kati
About 3 hours

Maagizo

1

Flow through the hose

Inapakia daftari la Jupyter…
2

A one-way valve before it

The embedded blueprint lets flow pass one way only. Meyer and Braun put one on the air pipe so the pumped air stays in the paint tank.
3

Read US 821,879

"The knob 35 is disposed in convenient position for the fore or index finger of the hand which holds the brush, and the valve or plunger 33 can thus be easily maintained in its closed or inward position and the supply of paint cut off when not required." "The air-pressure causes the paint to flow to the brush no matter in what position the latter may be held and the flow is under complete control of the operator, as above noted."
4

Fit the cap

Drill a 1.5 L PET bottle's cap for a tyre valve and for vinyl tubing. Seat the valve, and push the tubing through until it touches the bottom. Seal both with epoxy.

Vifaa kwa hatua hii:

Chupa ya PET (ya kinywaji chenye gesi)Chupa ya PET (ya kinywaji chenye gesi)1 kipande
Vali ya tairiVali ya tairi1 kipande
Mrija wa vinili angavuMrija wa vinili angavu1 kipande
Epoksi ya Sehemu MbiliEpoksi ya Sehemu Mbili1 kipande

Zana zinazohitajika:

Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Kisu cha kazi za mikonoKisu cha kazi za mikono
5

Feed the brush

Drill a 6 mm hole down through the stock of a 70 mm brush from the set, beside the handle. Push silicone tubing through it into the bristles and flatten its last 30 mm with a cable tie.

Vifaa kwa hatua hii:

Bomba la SilikoniBomba la Silikoni1 kipande
Vifungo vya nyayaVifungo vya nyaya1 kipande

Zana zinazohitajika:

Kibano cha meza ya kaziKibano cha meza ya kazi
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Seti ya brashi za rangiSeti ya brashi za rangi
6

Make the finger valve

Screw a hardwood block to the handle over the tubing. Fit an M5 screw through it with a spring under the head, so the screw rests off the tube and a press of the forefinger pinches it shut.

Vifaa kwa hatua hii:

Vijiti vya mbao ngumuVijiti vya mbao ngumu1 kipande
Skrubu za mashineSkrubu za mashine1 kipande
Seti ya springi za kubanaSeti ya springi za kubana1 kipande

Zana zinazohitajika:

Msumeno wa chumaMsumeno wa chuma
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Seti ya bisibisiSeti ya bisibisi
7

Join and pressurise

Join the bottle's tubing to the brush's with a 1.5 m length. Half fill the bottle with acrylic paint thinned with water, cap it, and pump to 0.2 bar on the gauge.

Vifaa kwa hatua hii:

Seti ya rangi za akrilikiSeti ya rangi za akriliki1 kipande
MajiMaji1 kipande

Zana zinazohitajika:

Pampu ya baiskeliPampu ya baiskeli
Kipima ShinikizoKipima Shinikizo
8

The patent drawing

US 821,879 drawing sheet, public domain (expired patent).
Hatua 8 - Image 1
9

Measure the flow

Hold the brush over the measuring cylinder for 30 s and read the paint. Repeat at 0.4 bar, with the brush upside down, and with the button pressed.
Hatua 9 - Image 1

Zana zinazohitajika:

Silinda ya kupimiaSilinda ya kupimia
Saa ya kupima mudaSaa ya kupima muda
Kipima ShinikizoKipima Shinikizo
10

A brush that floods, starves or will not stop

Pressure-fed fountain paint brush troubleshooting.

Flow

Loading...
11

History and honest limits

**Gottfried Meyer** and **Charles G. Braun** of Philadelphia filed US 821,879 on 22 November 1905; it was patented 29 May 1906. Their reservoir has a valve casing with a detachable plug valve; a pipe reaches the bottom with lateral apertures; a sheet-metal band closes the recess in the brush head; all parts detach for cleaning when the colour is changed. **Honest limits.** A pinch on silicone tubing stands in for their plunger in a tube, and a PET bottle at low pressure for their reservoir. The notebook treats paint as a simple liquid. Your flows are the result.

Vifaa

11

Zana Zinazohitajika

11

Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

One Way Only: The Check Valve and the Bang It Makes

One Way Only: The Check Valve and the Bang It Makes

na MartinNO

Zana

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The Tube-in-the-Back Fountain Brush: Turn the Tube and the Jets Become a Soak

The Tube-in-the-Back Fountain Brush: Turn the Tube and the Jets Become a Soak

na YourGrandmaIS

Mitambo

35
0
0
0
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The Long-Handled Fountain Brush: A Ring of Holes Wets the Bristles From the Ground

The Long-Handled Fountain Brush: A Ring of Holes Wets the Bristles From the Ground

na MartinNO

Mitambo

29
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