Year: 1898

page_text: I, THOMAS THORP, of Whitefield, near Manchester, in the County of Lancaster,
Engineer, do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to gas conduits or pipes and consists in the improved
arrangement and construction of means or devices for preventing back-firing and
explosions. The invention is more particularly applicable to gas pipes conveying
acetylene to burners as mixtures of this gas with air become highly explosive
when air is present in excess, which can easily occur when air enters the pipes
through leakages or cocks left open or when an acetylene generating apparatus
is first started. When a light is applied to a burner under such circumstances
the flame can strike back and fire the contents of the pipes and gas holder or
generator, and explosions injuring persons and property have occurred from
this cause.
The object of my invention is to prevent this, and my improvements consist
in the arrangement of heat abstracting plugs of wire gauze or its equivalent one
of which is placed into or next to each burner and another at the point where the
gas pipe leading to the burner or to several burners is connected to the gas holder
or generator or other pipe of large capacity, the explosion of the gas in which would
have a violent effect. The plugs are preferably formed of lapping or winding a
strip of wire gauze of suitable width tightly upon a central mandrel or bobbin
in a spiral lap till the coil has acquired a large diameter comparatively to that
of the pipe to which it is applied.
The plugs so formed are placed into casings so as to form a partition across
them between the gas inlet and outlet to and from the same. The side of the plug
next to the inlet may be supported on a grid of any suitable kind.
The plugs so formed have a great depth of gauze and consequently great power
of abstracting the heat from any flame and preventing the ignition of the gas on
the outlet side from striking through to the inlet side, while their large diameter
allows a free passage of the gas to the burner. If the flame nevertheless should
strike through the smaller plugs at the burner the explosion would not extend
to the larger storage vessel but be arrested by the deeper plug at the same and
remain confined to the pipes, where its effects would be confined to a bursting of
such pipes without causing further damage, or preferably to opening a spring
safety valve placed in some convenient position in the pipes, by means of which
no damage would be done.
قيوم
1000

page_text: Improvements connected with Gas Conduits.
I, THOMAS THORP, of Whitefield, near Manchester, in the County of Lancaster,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement; -
This invention relates to gas, conduits. or pipes and consists in the improved
arrangement and construction of means or devices for preventing back firing and
explosions. The invention is more particularly applicable to gas pipes conveying
acetylene to burners as mixtures of this gas with air become highly explosive
when air is present in excess, which can easily occur when air enters the pipes
through leakages or cocks left open or when an acetylene generating apparatus
is first started. When a light is applied to a burner under such circumstances
the flame can strike back and fire the contents of the pipes and gas holder or
generator, and explosions injuring persons and property have occurred from
this cause.
The object of my invention is to prevent this, and my improvements consist
in the arrangement of heat abstracting plugs of wire gauze or its equivalent one
of which is placed into or next to each burner and another at the point where the
gas pipe leading to the burner or to several burners is connected to the gas holder
or generator or other pipe of large capacity, the explosion of the gas in which would
have a violent effect. The plugs are preferably formed by lapping or winding a
strip of wire gauze of suitable width tightly upon a central mandrel or bobbin
in a spiral lap till the coil has acquired a large diameter comparatively to that
of the pipe to which it is applied.
On the drawing appended hereunto a plug thus formed is shewn inserted in
a gas pipe near to the burner in longitudinal and cross section.
Upon the central mandril or bobbin a wire gauze b is lapped until the coil has
acquired the requisite diameter to fit the casing c closely. The layers of gauze
are shown somewhat distant from each other on the drawing for the sake of
clearness, but in practice they would be close together wound on tightly.
The plugs so formed are placed into casings c so as to form a partition across
them between the gas inlet d and outlet d¹ to and from the same. The side of
the plug next to the inlet may be supported on a grid e of any suitable kind,
which may be cast in one with the casing or be separate and bear against an annu-
lar projection on the casing.
The plugs so formed have a great depth of gauze and consequently great power
of abstracting the heat from any flame and preventing the ignition of the gas on
the outlet side from striking through to the inlet side, while their large diameter
allows a free passage of the gas to the burner. If the flame nevertheless should
strike through the smaller plugs at the burner the explosion would not extend
to the larger storage vessel but be arrested by the deeper plug at the same and
remain confined to the pipes, where its effects would be confined to a bursting of
such pipes without causing further damage, or preferably to opening a spring
safety valve placed in some convenient position in the pipes by means of which
no damage would be done.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is;-
The construction and application of wire, gauze plugs substantially as herein-

page_text: before described and illustrated by the drawings and for the purpose set
forth.
Dated the 29th day of October 1898.
R. J. URQUHART,
57, Barton Arcade, Manchester,
Harrington Chambers, 24, North John Street, Liverpool,
Consulting Engineer and latent Agent.