The first smoke detector or fire alarm was invented in the year 1890 by Francis Robbins Upton. But it was George Andre Darby who got the first patent for heat detector in the year 1890 in England. In 1930, the Swiss Physicist Walter Jaeger was trying to invent a poison gas alarm but because the experiment failed, Jaeger started smoking and found that smoke was detected by the instrument. This led to the commercial production of smoke detector in 1960s which was mainly done by Duane D. Pearsall (also regarded as the inventor of cost-effective home smoke detector). Pearsall’s firm Statirol Corporation situation in Lakewood, Colorado, was the first enterprise to start the mass production of smoke detectors.
The first commercial smoke detector hit the market in 1969 and was taken well in the US and the UK Later, Duane d. Pearsall sold its invention to Emerson Electric in the year 1980 who further distributed and marketed smoke detectors to houses and offices.
