Lamp with cold wall
Publication Date: 2004-May-13
The IP.com Prior Art Database
ID399855 : lamp with cold wall
In halogen lamps, the lamp show bulb blow up problems during life time, because the lamp temperature is too high.
In order to decrease the bulb temperature, it is proposed to put a quartz or hard glass tube (which can resist to high temperatures, which is not the case with bulb) around the coil. The tube serves as thermal protection, and avoids the temperature of the bulb to become too high.
The lamp of this invention is simple : the tube is sealed with the outer envelope, the gas and the pressure inside the outer envelope and the tube are the same.