Incandescent mantles
OwnerJohn P. Edgarinventor
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Abstract
An improved incandescent mantle which is free of radioactive materials and stronger than mantles produced in the past. The present invention provides a mantle comprised of zirconia, yttria, erbia and ceria, which produces a resulting light output and color comparable for practical purposes to that of traditional thorium mantles. Although the invention is particularly adapted to mantles of inverted form, it is also applicable to other forms.
Claims15
A precursor mantle for incandescent gas lamps comprising:
- a substrate impregnated with a solution of salts of zirconium, yttrium, erbium and cerium which when pyrolized, form corresponding oxides.
A precursor mantle for incandescent gas lamps comprising:
- a substrate containing salts of zirconium, yttrium, erbium and cerium which when pyrolized, form corresponding oxides.
A mantle for incandescent gas lamps comprised of zirconium oxide, erbium oxide, yttrium oxide and cerium oxide.
A mantle for incandescent gas lamps prepared by a process comprising the steps of:
- impregnating a combustible substrate with a solution of salts of zirconium, erbium, yttrium, and cerium;
- withdrawing said combustible substrate from said solution;
- and
- drying said combustible substrate.
Dependencies are inferred from the claim text.