Safety device for gas-consuming equipment

Claim 2

In a safety device for gas-consuming equipment comprising a pilot-burner with a metastable flame which moves by displacing itself from its burner when the oxygen percentage of the ambient air drops below a predetermined limit, and a thermosensitive detector means for shutting off or greatly reducing the gas supply to said gas-consuming equipment upon sensing displacement of the burner flame of the said pilot burner, the improvement wherein: said pilot-burner includes a combustible gas inlet, an air inlet, a coMbustion plate with at least one combustion orifice at which combustion occurs under normal operating conditions and a mixing chamber means between said gas and air inlets and said combustion plate for ensuring thorough mixing of the combustible gas and the air; and an anti-deflagrating sleeve mounted on said pilot-burner over said combustion plate, said anti-deflagrating sleeve including a window at the top thereof and shutter means for opening said window when the pilot flame is not burning and automatically closing said window when the pilot flame is burning.

Claim 3

A safety device in accordance with claim 1 wherein said detector means is located on the vertical axis of said mixing chamber means and traverses the latter from one end to the other, thereby aiding the mixing therein.

Claim 4

A safety device in accordance with claim 1 wherein said pilot-burner further includes a sensitivity setting means comprising a movable collar for covering any predetermined portion of said air inlet.

Claim 5

A safety device in accordance with claim 1 further including lighting means for igniting the pilot burner incorporated within said pilot burner.

Claim 6

A safety device in accordance with claim 1 wherein said pilot burner is in the form of a tube having a horizontal axis with said combustible gas inlet and said air inlet at one end and said mixing chamber means at the other end, said combustion plate comprising the top wall of said mixing chamber means.

Claim 7

A safety device for gas-consuming equipment comprising a pilot-burner with a metastable flame which moves by displacing itself from its burner when the oxygen percentage of the ambient air drops below a pre-determined limit, and a thermosensitive detector means, having a tip, for shutting off or greatly reducing the gas supply to said gas-consuming equipment upon sensing displacement of the burner flame of the said pilot burner, the improvement wherein: said pilot-burner includes a combustible gas inlet, an air inlet, a combustion plate with a plurality of combustion orifices at which combustion occurs under normal operating conditions, wherein the tip of said thermosensitive detecter means is located between said combustion orifices and thus is not in contact with the combustion, and a mixing chamber means between said gas and air inlets and said combustion plate for ensuring thorough mixing of the combustible gas and the air; and an anti-deflagrating sleeve mounted on said pilot-burner over said combustion plate, said anti-deflagrating sleeve including a window at the top thereof and shutter means for opening said window when the pilot flame is not burning and automatically closing said window when the pilot flame is burning.

Claim 8

A safety device for gas-consuming equipment comprising a pilot-burner with a metastable flame which moves by displacing itself from its burner when the oxygen percentage of the ambient air drops below a pre-determined limit, and a thermosensitive detector means, having a tip, for shutting off or greatly reducing the gas supply to said gas-consuming equipment upon sensing displacement of the burner flame of the said pilot burner, the improvement wherein: said pilot-burner includes a combustible gas inlet, an air inlet, a combustion plate with a plurality of combustion orifices at which combustion occurs under normal operating conditions, wherein the tip of said thermosensitive detecter means is located between said combustion orifices and thus is not in contact with the combustion, and a mixing chamber means between said gas and air inlets and said combustion plate for ensuring thorough mixing of the combustible gas and the air; and an anti-deflagrating sleeve mounted on said pilot-burner over said combustion plate, said anti-deflagrating sleeve including a window at the top thereof and shutter means for opening said window when the pilot flame is not burning and automatically closing said window when the pilot flame is burning.