I want to know the answer to the following question:
What is the name for a lamp base with one or more contacts on the base and a shell used as a contact or used only as a mechanical support?
All the background I'm provided with is that "Large lamps may have a screw base (one or more contacts at the tip, one at the shell) or a bayonet base (one or more contacts on the base, shell used as a contact or used only as a mechanical support).". Is that enough to answer the question?
Answer: yes