The blowtorch is commonly used where adiffuse(wide spread) high temperature naked flame heat is required but not so hot as to causecombustionorwelding. Temperature applications aresolderingbrazing, softening paint for removal, melting rooftar, or pre-heating largecastingsbeforeweldingsuch as for repairing. It is also common for use in weed control bycontrolled burnmethods and meltingsnowandicefrompavementsanddrivewaysin cold climate areas. Especially the United States and Canada, road repair crews may use a blowtorch to heatasphaltorbitumenfor repairing cracks in preventive maintenance. It is also used incooking; one common use is for the creation of the layer of hard caramelized sugar in acrme brûle.2

In 1882, a new vaporizing technique was developed byCarl Richard Nybergin Sweden,1and the year after, the production of the Nyberg blowtorch started. It was quickly copied or licensed by many other manufacturers.

In the case of the gas torch the fuel tank often is small and serves also as the handle, and usually is refuelled by changing the fuel tank with the liquefied gas in it.

Largepropane torchused for construction

in Wiktionary, the free dictionary.

liquid petroleum gas(LPG) with ambient atmospheric air via a replaceable LPG cylinder.

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For other uses, seeBlowtorch (disambiguation).

Early blowtorches usedliquid fuel, carried in a refillable reservoir attached to the lamp. Modern blowtorches are mostly gas-fuelled. Their fuel reservoir is disposable or refillable by exchange. The term blowlamp usually refers to liquid-fuelled torches still used in the UK. Liquid-fuelled torches are pressurized by a piston hand pump, while gas torches are self-pressurized by the fuel evaporation.

Fuel torches are available in a vast range of size and output power. The term blowtorch applies to the smaller and lower temperature range of these. Blowtorches are typically a single hand-held unit, with their draught supplied by a natural draught of air. The larger torches may have a heavy fuel reservoir placed on the ground, connected by a hose. This is common for butane- or propane-fuelled gas torches, but also applies to the older, large liquid paraffin (kerosene) torches such as theWells light.

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The US blowtorch was independently developed with a distinctive flared base and was fuelled bygasoline, whereas the European versions usedkerosenefor safety and low cost.

The blowtorch is referred to in industry and trade as per the fuel consumed by the tool:

Aflame gunis a large type of blowlamp with built-in fuel tank, used for various purposes: weed control bycontrolled burnmethods, melting snow and ice off walk and driveways in the winter, starting a fire, etc. It is commonly confused in word usage with aflamethrower.

This page was last edited on 10 July 2018, at 11:20

In 1797 or 1799, German inventor August von Marquardt invented a blowtorch inEberswalde.

(British Englishuses the wordblowtorchto mean a cutting torch as used for cutting metal, often anyoxy-fuel welding and cuttingtorch.)

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From Wikipedia, the free encyclopedia

An old-fashioned kerosene/paraffin blowtorch/blowlamp

BBC – Food, Caramelising with a blowtorch.

Ablowtorch(U.S. and Australia), orblowlamp(UK), is a fuel-burningtoolused for applyingflameandheatto various applications, usuallymetalworking.

Another early blow pipe patent comes from USA, dated May 13, 1856.

Liquid, with ambientafter vaporizing it using a coiled tube passing through the flame. They take time to start, needing pre-heating with burningmethylated spirit:

The forms with ga搜索引擎优化us fuel are sometimes fed from aliquid petroleum gascylinder via a hose.

Many torches now use a hose-supplied gas feed, which is often mains gas. They may also have aforced-airsupply, from either an air blower or an oxygen cylinder. Both of these larger and more powerful designs are less commonly described as blowtorches, while the term blowtorch is usually reserved for the smaller and less powerful self-contained torches. The archaic term blowpipe is sometimes still used in relation tooxy-acetylene weldingtorches.

After theKorean Warin the 1950s, propane caused many changes in the blowtorch industry worldwide, and by the 1970s most manufacturers of the old type of blowtorch, using gasoline or kerosene as fuel, had disappeared. There remain several manufacturers producing brass blowtorches in India, China andNorth Koreafor markets where propane gas is difficult to obtain or too expensive to be viable.

The blowtorch is of ancient origin and was used as a tool by gold and silversmiths. They began literally as a blown lamp, a wickoil lampwith a mouth-blown tube alongside the flame. This type of lamp, with spirit fuel, continued to be in use for such small tasks into the late 20th century.

October 1, 1926, pp 685. Blowtorch Made from Gasoline Lamp by LB Robbins: Google books:[1]

Modern paraffin flame gun, 3 feet 3 inches = 1 m long

kerosene as perC.R. Nybergof Sweden patent of 1882: a simpleusing liquidfuel(such askerosene(USA) / paraffin oil (UK).

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