Combustion – Burner head cover operatively interrelated with igniter – Interconnected with valve in fuel feed passage
Patent
1992-11-27
1994-05-03
Dority, Carroll B.
Combustion
Burner head cover operatively interrelated with igniter
Interconnected with valve in fuel feed passage
431132, 431255, 431150, F23Q 208
Patent
active
053082400
DESCRIPTION:
BRIEF SUMMARY
Conventional pocket or table flame lighters, which are used for lighting cigarettes and other smoking material, and for other purposes, such as for lighting candles and for providing occasional illumination, have a burner which provides a low intensity, luminous flame of yellowish colour and appreciable height, but subject to vagaries of local air draughts and winds. Accordingly, a lighter with such a burner is more suitable for use indoors and the willowy flame is aesthetically pleasing.
In recent years flame lighters have been developed with a "blue" flame burner, that is to say a burner which is supplied with gaseous fuel and an excess of air, so that the fuel burns, in the manner of a Bunsen burner, with a fierce, very hot, not very visible, flame, which is often, but not necessarily, blue in colour, the flame impinging on an exposed glow element of metal, ceramic, or other suitable material, such as a coil or grid, which is consequently rendered at least red hot. Such lighters, which have been described as "flameless" or "turbo" lighters, find particular use as sports lighters out of doors, since the intense flame ensures continuous burning, even in relatively high winds, and total windproofness due to re-ignition of the gaseous fuel, were it otherwise to be blown out by the wind, particularly if the glow element is made of platinum, which provides a catalytic effect in initiating re-ignition of the fuel gas. However, lighters with a blue flame burner have the disadvantage that the intense heat from the blue flame makes it difficult for the user to hold the lighter with the flame burning for more than a quarter of a minute or so, and the absence of an elongate luminous flame, makes it difficult to use the lighter for ancillary purposes, such as lighting candles, providing transient illumination, or lighting cigarettes for other people.
In accordance with the present invention, a flame lighter comprises a casing containing at least one reservoir for liquefied gaseous fuel; a first, blue flame burner, which is arranged to be supplied with gaseous fuel from the, or one of the, reservoir(s) through a first valve; a manually operated ignition mechanism for igniting the fuel at the first burner so that the fuel burns near to a glow element which is thus heated by the blue flame; and a second, luminous flame burner, which is arranged to be supplied with gaseous fuel from the, or another of the, reservoir(s) through a second valve; a nozzle of the second burner being adjacent to the first burner so that the fuel at the second burner is ignitable by heat generated at the first burner whenever the first burner is burning and the second valve is open, and the first valve then being closable when the second valve remains open so that only the luminous flame continues to burn. Preferably the lighter can be used in any one of three modes in which one or other, or both, of the burners is or are burning.
With this arrangement, the benefits of an indoor lighter, with a luminous flame burner, and of the outdoor lighter with a blue flame burner are simultaneously obtained with a single ignition mechanism. In practice the only duplication involves the use of a single second burner valve and nozzle and the means to open the second burner valve, and these are cheap components.
The essential difference between the first, blue flame burner, and the second, luminous flame burner, is that the respective air inlet which provides oxygen for nourishing the combustion of the fuel is arranged to provide more air for the first burner than for the second burner, usually by throttling and accelerating the gas flow to the blue flame burner and using a venturi to draw in the air.
In practice, the first valve will be opened and the ignition mechanism operated to ignite the blue flame, and if it is needed, the second valve will be opened, before, substantially simultaneously with, or after, opening of the first valve, so that the yellow flame is ignited as a result of its proximity to the blue flame and/or to the red hot glow element. The
Adams Bruce L.
Colibri Lighters Limited
Dority Carroll B.
Wilks Van C.
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