A high pressure discharge lamp includes a sealed lamp vessel (1) having a quartz glass wall (2) enclosing a discharge space (3). Metal foils (4) are embedded in the wall, connected to electrode rods (6), and have a circumferential coating (7) of quartz glass at least adjacent the metal foil. The coating...http://www.google.com/patents/US5461277?utm_source=gb-gplus-sharePatent US5461277 - High-pressure gas discharge lamp having a seal with a cylindrical crack about the electrode rod
