Smoke generator
First Claim
1. A smoke generator comprising:
- A housing;
an electrical power source;
an electric pump mounted in said housing and connected to said electrical power source;
a fluid reservoir mounted in said housing and operatively connected to said pump;
a coiled electrical resistance heating tube mounted in said housing and forming an electrical resistance in an electrical circuit, said coiled electrical resistance heating tube having a thin coating of an electrical insulating, thermal conducting material thereon, said coating containing a boron nitride therein, said coating electrically isolating said coils of said coiled electrical resistance heating tube and conducting heat between cold and hot ends of said coiled electrical resistance heating tube and said coiled electrical resistance heating tube having one end operatively connected to said pump;
smoke outlet means located at another end of said coiled electrical resistance heating tube for directing heated fluid generated in said coiled electrical resistance heating tube therefrom;
sensing means for sensing temperature in at least one position in said coiled electrical resistance heating tube and being positioned adjacent to one end of said coiled electrical resistance heating tube; and
switching means for switching said pump on and off responsive to said sensing means sensing predetermined temperatures, whereby smoke is generated in said coiled electrical resistance heating tube upon said tube reaching a predetermined temperature and said pump being switched on to pump fluid from said reservoir through said coiled electrical resistance heating tube.
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Accused Products
Abstract
A smoke generator apparatus has a housing with an electrical pump mounted in the housing and connected to a fluid reservoir filled with a fluid for generating smoke. A coiled electical resistance heating tube is mounted in the housing and forms an electrical resistance in an electrical circuit. The coiled electrical resistance heating tube has a thin coating of an electrical insulating, thermal conducting material, such as a thin coating of boron nitride thereon which electrically isolates the coils of the coiled electrical resistance heating tube while conducting heat through the coils from the hot to the cold end of the coiled electrical resistance heating tube. The coiled electrical resistance heating tube has one end operatively connected to the pump and the other end forming an outlet for dispensing superheated vapors into the ambient air for condensation into smoke particles. A pair of thermostats is mounted at different positions on the coated coiled electrical resistance heating tube for sensing the temperature therein for controlling heater temperature and actuating the pump for pumping the fluid from the reservoir into the resistance heating tube for generating the smoke.
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Citations
22 Claims
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1. A smoke generator comprising:
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A housing; an electrical power source; an electric pump mounted in said housing and connected to said electrical power source; a fluid reservoir mounted in said housing and operatively connected to said pump; a coiled electrical resistance heating tube mounted in said housing and forming an electrical resistance in an electrical circuit, said coiled electrical resistance heating tube having a thin coating of an electrical insulating, thermal conducting material thereon, said coating containing a boron nitride therein, said coating electrically isolating said coils of said coiled electrical resistance heating tube and conducting heat between cold and hot ends of said coiled electrical resistance heating tube and said coiled electrical resistance heating tube having one end operatively connected to said pump; smoke outlet means located at another end of said coiled electrical resistance heating tube for directing heated fluid generated in said coiled electrical resistance heating tube therefrom; sensing means for sensing temperature in at least one position in said coiled electrical resistance heating tube and being positioned adjacent to one end of said coiled electrical resistance heating tube; and switching means for switching said pump on and off responsive to said sensing means sensing predetermined temperatures, whereby smoke is generated in said coiled electrical resistance heating tube upon said tube reaching a predetermined temperature and said pump being switched on to pump fluid from said reservoir through said coiled electrical resistance heating tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A smoke generator comprising:
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A housing; an electrical power source; an electric pump mounted in said housing and connected to said electrical power source; a fluid reservoir mounted in said housing and operatively connected to said pump; a coiled electrical resistance heating tube mounted in said housing and forming an electrical resistance in an electrical circuit, said coiled electrical resistance heating tube having a thin coating of an electrical insulating, thermal conducting material thereon, said coating containing boran nitride and electrically isolating said coils of said coiled electrical resistance heating tube and conducting heat between cold and hot ends of said coiled electrical resistance heating tube, said coiled electrical resistance heating tube having one end operatively connected to said pump; smoke outlet means on an other end of said coiled electrical resistance heating tube for heated fluid generated in said coiled electrical resistance heating tube therefrom; sensing means for sensing temperature in at least one position in said coiled electrical resistance heating tube and being positioned adjacent thereto; switching means for switching said pump on and off responsive to said sensing means sensing predetermined temperatures, whereby smoke is generated in said coiled electrical resistance heating tube upon said tube reaching a predetermined temperature and said pump being switched on to pump fluid from said reservoir through said coiled electrical resistance heating tube; and thermostat control means having first and second thermostats, the first thermostat being normally closed and opening upon one end of said coiled electrical resistance heating tube reaching a predetermined temperature and the second thermostat being normally open to block the operation of the electrical pump until the other end of said coiled electrical resistance heating tube reaches a predetermined temperature. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification