Patent ID: 7845972

Claim:
A lampholder ( 1 ) including: a generally cylindrical ceramic housing ( 2 ) terminating in a closed proximal end ( 3 ) having an electrical insulator ( 4 ) thereon, and an open distal lamp-receiving end ( 5 ); a thermal switch ( 6 ) retained in a channel ( 7 ) of a radiator ( 8 ) thermally bonded to the exterior ( 4 ) of a ceramic housing ( 2 ); a first power lead ( 10 ) of said thermal switch is connected to a screw-shell ( 21 ) within ceramic housing ( 2 ) and a second power lead ( 12 ) extending from said thermal switch for connection to a remote source of electrical power; a center lamp contact ( 22 ) supported in the closed proximal end ( 3 ) of said ceramic housing ( 2 ) and connected to a first external connector ( 14 ) for connection to external power; and an optional intermediate lamp contact ( 23 ) also supported in the closed proximal end ( 3 ) of said ceramic housing ( 2 ) and connected to a second external connector ( 15 ) for connection to external power.