公开(公告)号：US3840768A

公开(公告)日：1974-10-08

申请号：US27954872

申请日：1972-08-10

申请人： GEN ELECTRIC

发明人： WHITE J ,  SMIALEK R

IPC分类号： H01J61/073 ,  H01J61/54 ,  H01J17/32

CPC分类号： H01J61/545

摘要： A high intensity metal vapor electric discharge lamp having self-heating main electrodes at opposite ends and a starter electrode at one end. A cermet igniter comprising a sintered mixture of metal and refractory or emissive metal oxide is attached to and spaced close to the main electrode at the end having the starter electrode. The igniter operates as much as 1,000*C. cooler than the main electrode and retains its emission material throughout life. A glow or arc initiated on it readily transfers to the main electrode. It serves to reduce the starting voltage or prevent rise in starting voltage in seasoned lamps.