JOHN PETER EDGAR
Engineers in Alameda, CA
License number
Pennsylvania PE030010E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Alameda, CA 94501
Pennsylvania
Pennsylvania
Professional information
Incandescent Mantles
US Patent:
5071799, Dec 10, 1991
Filed:
Dec 28, 1989
Appl. No.:
7/458313
Inventors:
John P. Edgar - Alameda CA
International Classification:
C04B 3548, F21H 100
US Classification:
501103
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.
Incandescent Mantles
US Patent:
5124286, Jun 23, 1992
Filed:
Jul 3, 1990
Appl. No.:
7/547819
Inventors:
John P. Edgar - Alameda CA
International Classification:
F21H 102, C04B 3548
US Classification:
501103
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.