Lewis Haslett's "Inhaler or Lung Protector," 1847
Among the early forerunners of the gas mask was a device invented in 1847 by
Lewis P. Haslett of Louisville, KY. It allowed breathing through a nose or mouth piece fitted with two one-way clapper
valves: one to permit the inhalation of air through a bulb-shaped filter, and the other to vent exhaled air directly into the atmosphere.
Similar use of valves became common in later masks. The filter material — wool or other porous substance moistened with water —
was suited to keeping out dust or other solid particulates, but would not have been effective against poison gas.
In 1849, Haslett's Lung Protector was granted the first US patent for an air-purifying respirator.
John Tyndall - Fireman's Respirator, 1871
In 1871, the prominent British physicist John Tyndall wrote about his new invention: a "fireman's respirator"
that combined the protective features of the Stenhouse mask and other breathing devices. After continued development,
he exhibited this early form of gas mask at a meeting of the Royal Society in London in 1874. The July 1875 issue
of Manufacturer and Builder described it as follows:
Prof. Tyndall's fireman's hood ... is supplied with a respirator, consisting of a valve chamber and filter-tube
about four inches long, screwed on outside, with access to it from the inside by a wooden mouthpiece.
The respiratory agency consists of cotton wool saturated with glycerin, lime, and charcoal; the lime absorbs
the carbonic acid, (one of the products of combustion,) the glycerin acts on the smoke particles, and the charcoal
on the hydro-carbon developed in vapors, and Prof. Tyndall declared that after protecting himself with a hood thus
prepared he could go into an atmosphere of the most atrocious character and live for a half an hour where he could not,
unprotected, have existed for a single minute.
Info collector
Author : Innovator K.BALAKRISHNA. (Kolar gold field)
MEMBER : CIIE & NIF
Among the early forerunners of the gas mask was a device invented in 1847 by
Lewis P. Haslett of Louisville, KY. It allowed breathing through a nose or mouth piece fitted with two one-way clapper
valves: one to permit the inhalation of air through a bulb-shaped filter, and the other to vent exhaled air directly into the atmosphere.
Similar use of valves became common in later masks. The filter material — wool or other porous substance moistened with water —
was suited to keeping out dust or other solid particulates, but would not have been effective against poison gas.
In 1849, Haslett's Lung Protector was granted the first US patent for an air-purifying respirator.
John Tyndall - Fireman's Respirator, 1871
In 1871, the prominent British physicist John Tyndall wrote about his new invention: a "fireman's respirator"
that combined the protective features of the Stenhouse mask and other breathing devices. After continued development,
he exhibited this early form of gas mask at a meeting of the Royal Society in London in 1874. The July 1875 issue
of Manufacturer and Builder described it as follows:
Prof. Tyndall's fireman's hood ... is supplied with a respirator, consisting of a valve chamber and filter-tube
about four inches long, screwed on outside, with access to it from the inside by a wooden mouthpiece.
The respiratory agency consists of cotton wool saturated with glycerin, lime, and charcoal; the lime absorbs
the carbonic acid, (one of the products of combustion,) the glycerin acts on the smoke particles, and the charcoal
on the hydro-carbon developed in vapors, and Prof. Tyndall declared that after protecting himself with a hood thus
prepared he could go into an atmosphere of the most atrocious character and live for a half an hour where he could not,
unprotected, have existed for a single minute.
Info collector
Author : Innovator K.BALAKRISHNA. (Kolar gold field)
MEMBER : CIIE & NIF
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