Incandescent mantles
OwnerJohn P. Edgarinventor
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Abstract
An improved incandescent mantle which is stronger than mantles produced in the past as well as free of radioactive materials. The present invention provides a mantle comprised of zirconia, yttria and erbia, 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 and erbium which when pyrolized, form corresponding oxides.
A precursor mantle for incandescent gas lamps comprising:
- a substrate containing salts of zirconium, yttrium and erbium which when pyrolized, form corresponding oxides.
A mantle for incandescent lamps comprised of zirconium oxide, erbium oxide, and yttrium oxide, wherein said oxides are in proportions resulting from a salt of zirconium in a range from 60-66%, and from salts of erbium and yttrium in an erbium/yttrium ratio of 2.20 2.40 to 1.
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, and yttrium;
- withdrawing said combustible substrate from said solution;
- and
- drying said combustible substrate.
Dependencies are inferred from the claim text.