Improvements introduced in the electric shock lamps. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements introduced in electric discharge lamps, characterized in that they comprise a vitreous outer envelope or blister enclosing an arc tube having electrodes hermetically passed thereon at opposite ends, the vacuum being made in the space comprised between said envelope and said arc tube, and a heat reflective coating at the ends of said arc tube consisting essentially of zirconium oxide ZrO2. (Machine-translation by Google Translate, not legally binding)