Combustion – Burner having electrical heater or igniter – Igniter in shelter chamber
Patent
1992-09-03
1994-02-08
Jones, Larry
Combustion
Burner having electrical heater or igniter
Igniter in shelter chamber
431255, 431354, 126401, 126408, 126410, F23Q 708
Patent
active
052844390
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to an igniting device which injects flame from a nozzle by igniting fuel gas discharged from a built-in gas reservoir.
BACKGROUND OF THE INVENTION
In an igniting device such as an igniting rod or a table gas lighter, a flame is injected through a gas injection nozzle held on an end of a rod-like member which projects from a valve mechanism for controlling gas supply from a gas reservoir. Conventionally, the gas injection nozzle is surrounded by a metal cover having air inlet ports.
However such a structure is disadvantageous in that, since the gas injection nozzle is communicated with the outside through the air inlet ports which open downward and sideward, wind, oil, fire work or the like can enter through the air inlet ports to blow off flame and dielectric matter can adhere to the nozzle to weaken discharge spark.
Though there has been known a cap which is mounted on the tip of the gas injection nozzle to overcome the problem, mounting and demounting of cap is troublesome and there is a fear of losing the cap.
In order to mix the fuel gas discharged from the nozzle with air to improve combustibility, air must be introduced into the space around the nozzle and accordingly, the air inlet ports formed in the cover cannot be simply closed to overcome the problem described above.
In view of the foregoing observations and description, the primary object of the present invention is to provide an igniting device in which the gas injection nozzle can be protected from wind or foreign material and good combustibility of the fuel gas discharged from the nozzle can be long ensured.
DISCLOSURE OF THE INVENTION
The igniting device in accordance with the present invention comprises a gas reservoir for storing therein fuel gas, a valve mechanism which controls fuel supply from the gas reservoir, a piezoelectric unit, a gas injection nozzle provided on a tip of a rod-like portion projecting from the valve mechanism and a discharge electrode which is disposed in the vicinity of the gas injection nozzle and produces discharge spark to ignite the fuel gas discharged from the nozzle, wherein the improvement comprises a nozzle cover made of non-conductive material and provided around the gas injection nozzle, the nozzle cover having a front end face disposed in front of the nozzle at a distance therefrom, the front end face being cut away at a portion opposed to the gas injection nozzle and a portion opposed to the discharge electrode to form an opening.
In the igniting device in accordance with the present invention, the nozzle cover disposed around the gas injection nozzle is provided with a frond end face forward of the gas injection nozzle except the portions opposed to the gas injection nozzle and the discharge electrode. The front end face prevents smoke of fire work, wind, oil and the like from directly contacting the the gas injection nozzle, whereby foreign matter such as dielectric material is prevented from adhering to the nozzle tip to weaken discharge spark and wind or the like is prevented from blowing off the flame. Thus, in the igniting device of the present invention, the fuel gas can be steadily ignited.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a vertical cross-sectional view of an igniting device in accordance with an embodiment of the present invention,
FIG. 2 is a horizontal cross-sectional view of the same,
FIG. 3 is an enlarged view of a part of FIG. 1,
FIG. 4 is a perspective view of the nozzle cover,
FIG. 5 is a side view partly in cross-section showing an igniting device in accordance with another embodiment of the present invention, and
FIG. 6 is an enlarged perspective view showing the tip of the rod portion in still another embodiment of the present invention with the tubular member removed.
PREFERRED EMBODIMENT OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings, hereinbelow. FIG. 1 is a cross-sectional view of an igniting rod in accordance with an embodiment of the present invention,
REFERENCES:
patent: 4502465 (1985-03-01), Yoshinaga et al.
patent: 4688551 (1987-08-01), Nakajima
patent: 4920952 (1990-05-01), Nakajima
Eguchi Toshihiko
Saito Masaki
Shike Tsutomu
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