Ammunition and explosives – Smoke generating
Reexamination Certificate
1999-06-11
2001-02-20
Jordan, Charles T. (Department: 3641)
Ammunition and explosives
Smoke generating
C102S530000, C102S531000, C392S394000, C392S397000
Reexamination Certificate
active
06189453
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to an improved structure of a smoke generator, more particularly to a heating vaporization device of the smoke generator to quickly heat and achieve complete vaporization of a chemical solution.
(b) Description of the Prior Art
In stage performance, smoke can create good visual effects. Smoke effects generally fall into two forms. In the first form, the smoke pervades the air. In the second form, the smoke is low and hangs above the floor of the stage. In general, dry ice is used to create the second form of smoke effect. However, dry ice is expensive.
The first form of smoke effect is indispensable in stage performances. With reference to
FIG. 1
, a conventional smoke generator generally includes a pump A that is communicates with a container D for storing a chemical solution C via a duct B. The pump A pumps chemical solution C to a heating tank E where the solution C is heated and vaporized to form smoke and mist. The smoke thus generated passes through a nozzle provided on the heating tank E to pervade the air and create the desired visual effect. It can therefore be seen that the function of the heating and vaporization device of the conventional smoke generator is mainly to ensure complete vaporization of the chemical solution and avoid ejection of smoke in the form of droplets that may scald people around or wet the floor, which is dangerous.
The heating tank E shown in
FIG. 1
is the subject of R.O.C. Utility Model Pat. No. 119093 to the inventor of the present invention. The heating tank E includes a base E
1
internally provided with a base hole E
2
and a heating chamber E
3
. A screw rod E
4
is disposed in the base hole E
2
. A solution duct E
5
transports the solution C supplied via the pump A into the base hole E
2
so that the solution C travels along the screw rod E
4
towards a smoke ejecting device E
6
at a front end of the base hole E
2
. A heating device E
7
is provided inside the heating chamber E
3
to heat the base hole E
2
above. The high temperature thus generated causes the solution C to become vaporized, and the smoke is ejected by the smoke ejecting device E
6
. The above-described heating and vaporization device can achieve complete vaporization of the solution C. But the heating device E
7
must be pre-heated prior to use to a temperature sufficient to vaporize the solution C in order pump the solution C to the base hole E
2
for vaporization using the pump A. Such an indirect method of heating is not very satisfactory. Besides, since use of the heating tube is power-consuming, alternating currents are utilized. In outdoor occasions where alternating currents are unavailable, a heating and vaporization device as such cannot be used.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide an improved structure of a smoke generator equipped with a heating vaporization device to quickly heat and achieve complete vaporization of a chemical solution.
REFERENCES:
patent: 5344319 (1994-09-01), Manzke
patent: 5870524 (1999-02-01), Swiatosz
Dougherty & Troxell
Jordan Charles T.
Sanchez Glenda L.
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