Combustion – Burner cap – cover or extinguisher – Movably or removably mounted cover for flame holder
Patent
1999-02-16
2000-08-15
Dority, Carroll
Combustion
Burner cap, cover or extinguisher
Movably or removably mounted cover for flame holder
431298, 431277, F23Q 2500
Patent
active
061026883
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a wick that draws up to be burned a liquid fuel in a lighter or other liquid fuel burner using an alcohol fuel or the like and to a liquid fuel burner equipped with the wick.
In particular, this invention relates to a wick and a wick peripheral structure for obtaining a desired burning state in a burner (e.g., a cigarette lighter, torch, lantern or other such fire-lighting device, lamp or the like) using a liquid fuel such as an alcohol, a benzene hydrocarbon or a petroleum hydrocarbon.
BACKGROUND TECHNOLOGY
An alcohol fuel such as ethyl alcohol, a benzene fuel of the petroleum benzene type or a liquid gas fuel such as butane gas or propane gas is generally used as the fuel of a cigarette lighter, fire-lighting device, torch, lamp or other such burner.
The performance, ease of use, and structural design of such burners differs depending on the kind of fuel used, and each has its own characteristics. In the case of a liquid gas fuel, for instance, the gas pressure is high in the use temperature range of the burner and the vessel storing the fuel has to have a pressure-resistant structure. Moreover, the flame length changes with variation in the gas pressure and since it is a characteristic of the gas pressure to vary logarithmically and greatly with temperature, large change in flame length with temperature becomes a particular problem. In order to reduce this flame-length variation, the fuel supply mechanism of the burner requires a special design countermeasure for affecting temperature compensation, which complicates the structure and is disadvantageous from the aspect of cost.
In contrast, since a liquid fuel such as an alcohol fuel is a liquid at ordinary temperatures and is also relatively low in vapor pressure, it does not require a pressure-resistant vessel in the fuel storage section and, as such, simplifies the structure of the burner and is advantageous from the aspect of cost. Further, in the liquid fuel burner, the means used to supply the liquid fuel from the fuel storage section to the flame-producing section is generally a wick that utilizes the surface tension of the liquid fuel to draw it up through continuous fine holes or fine voids among bundled fibers by capillarity and burns it at the tip portion thereof.
Specifically, the wick used for drawing up the fuel is a string-like one obtained by twisting fibers, one obtained by bundling fibers, one using both of these with the glass fibers enclosed in cotton yarn and the result interwoven with fine metal wires to prevent disintegration, or the like, whose the lower end portion functions to draw up fuel to be burned at the upper end tip portion.
The flame-producing section of the wick has to be sealed by an openable/closeable closure cap in order to prevent evaporation of the liquid fuel during nonuse. In addition, a striker wheel or other igniter must be installed near the wick for scattering sparks to light the wick.
Since the closure cap is ordinarily installed to open and close about a pivot at one end portion thereof, its cap portion for sealing the flame-producing section of the wick passes along an arcuate path and, therefore, when it is attempted to make such a lighter or other burner compact, the need to prevent interference of this path with the wick tip portion, the wick holder, the striker wheel etc. hinders the size reduction.
Particularly, as regards sealing of the portion of the wick holder of the wick, the sealing end portion of the closure cap must interpose between the wick holder portion and the igniter, e.g., striker wheel, in order to enable covering of the peripheral portion of the wick holder portion, and if the igniter is spaced away from the wick in order to avoid interference of the sealing end portion with the igniter, a problem of igniting performance degradation may arise because of, for example, the elongated spark travel distance. Good igniting performance is therefore preferably secured by disposing the igniter near the wick.
On the other hand, when the igniter is i
REFERENCES:
patent: 2539653 (1951-01-01), Back
patent: 2680962 (1954-06-01), Lipic et al.
patent: 4035138 (1977-07-01), Walters
patent: 5211553 (1993-05-01), Menter
patent: 5425633 (1995-06-01), Cole
Mifune Hideo
Nakamura Yasuaki
Tsukamoto Takashi
Dority Carroll
Tokai Corporation
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