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Heat Gun for Paint Removal: Ferris, 1963
Edwin W. Ferris of Greenwich, Connecticut, patented this electric paint remover in 1963, US 3,094,606: a heat gun that softens old paint without a flame. A fan in a housing with a handle blows air through a barrel. Inside is a removable heating unit, a ceramic core wound with resistance wire, with a second coil on a plate across it. The barrel's inner wall is a metal jacket: cooling air flows outside it while the air heated by the coils leaves the mouth at 500–1300 °F (260–700 °C), so the outside stays cool enough to hold. For household current Ferris proposed 110 V and a 1300 W element. A ring with a lever at the barrel's root sets how much air is heated.
Abantado
Workshop process
Mga Tagubilin
1
1
Housing and fan
Housing and fan
Build the gun-like housing with a handle and a fan housing; fit a drum-type fan driven by a small motor.
Mga materyales para sa hakbang na ito:
Kaha ng heat gun na may scroll ng bentilador1 piraso
Drum na bentilador at maliit na motor1 pirasoMga kailangang kasangkapan:
Set ng mga distornilyador2
2
Heating unit
Heating unit
Wind resistance wire round a cylindrical ceramic core pierced with holes, ending in a ceramic disc with air holes and bayonet connectors so the unit can be taken out and replaced. Fit a ceramic plate with a second coil across the inside of the core; connect both coils in parallel.
Mga materyales para sa hakbang na ito:
Seramikong core ng heater na may resistance coil1 pirasoMga kailangang kasangkapan:
Plais na Kombinasyon3
3
Barrel
Barrel
Mount the heating unit in the barrel, whose inner wall forms a jacket: cooling air passes outside it from the fan housing to the atmosphere, while heated air passes through the core to the mouth.
Mga materyales para sa hakbang na ito:
Metal na bariles na may jacket1 pirasoMga kailangang kasangkapan:
Set ng mga distornilyador4
4
Air control
Air control
Fit the control ring with its lever between the core's disc and the ceramic base; turning it opens or closes rows of holes and sets how much of the air passes the heating coils.
Mga materyales para sa hakbang na ito:
Singsing na pangkontrol ng daloy ng hangin1 pirasoMga kailangang kasangkapan:
Set ng mga distornilyadorMga Materyales
5- Placeholder
- Placeholder
- Placeholder
- 1 pirasoPlaceholder
- Placeholder
Mga Kinakailangang Kasangkapan
2- Placeholder
- Placeholder
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