초록 ▼

An incandescent lamp unit in which a light emitting element of the tungsten-halogen type is placed within an outer, safety protecting transparent envelope. The element, being protected by the outer envelope, is filled with a gas at a high pressure, thereby increasing its efficiency, and the space be

An incandescent lamp unit in which a light emitting element of the tungsten-halogen type is placed within an outer, safety protecting transparent envelope. The element, being protected by the outer envelope, is filled with a gas at a high pressure, thereby increasing its efficiency, and the space between the element and the outer envelope is also preferably filled with a gas having good heat conductivity properties. The outer envelope also can have a coating of a material which transmits visible range energy and reflects infrared energy.

대표청구항 ▼

A ruggedized, general service tungsten-halogen lamp unit comprising: a sealed first envelope of transparent vitreous material having therein an incandescent filament, an amount of a halogen scavenger and a fill gas at a pressure of at least between about 6 and about 12 atmospheres when the lamp unit

A ruggedized, general service tungsten-halogen lamp unit comprising: a sealed first envelope of transparent vitreous material having therein an incandescent filament, an amount of a halogen scavenger and a fill gas at a pressure of at least between about 6 and about 12 atmospheres when the lamp unit is inoperative, the material of said first envelope being substantially impervious to the fill gas, a sealed transparent outer protective envelope of a material and construction which is mechanically strong enough to withstand explosion of said first envelope surrounding said first envelope, and a fill gas having a pressure of at least about 600 torr when the lamp unit is inoperative in the space between said first and outer envelopes to reduce the stresses on the inner envelope.