Double-based lamp and socket therefor, and lamp base...

Details Double-based lamp and socket therefor, and lamp base... Double-based lamp and socket therefor, and lamp base...

H - Electricity

01

J

H01J 61/02 (2006.01) H01K 1/00 (2006.01) H01R 33/02 (2006.01) H01R 13/64 (2006.01)

Patent

CA 2176399

To insure that lamps which have a non-rotation symmetrical feature or structure with respect to aligned bases (e.g., a tipped-off exhaust or pumping stub) are placed in a predetermined preferred operating position when inserted into socket terminals (2a, 2b), the lamp bases are formed with stepped surface abnormalities (10a, 10b), for example, in the form of recesses or projections from a terminal engagement surface (8a, 8b) extending perpendicularly to the lamp axis (A-A); socket springs (2a, 2b) have matching surface abnormalities which interengage with the surface abnormality on the base, for example by being formed with ridges, or depressions. The lamp thus can be inserted in such bases only if the respective surface abnormalities on the lamp bases and in the socket terminals can engage. The lamp, however, can be used also with socket terminals which do not have such interengagement surface abnormalities, so that the lamps are universally usable with specific location-determining sockets, or with sockets where the position of the lamp must be determined by a user:

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