Who did invent the bottom bracket, and what did the mark-1 look like? Was it taken from some other device or what?
You may want to do some research on tandem bottom brackets , oil bath and grease injection lubing, principles of lubrication (tribology), threading standards (Whitworths, Italian, French etc).
Im sure you are capable of looking this stuff up on google, or even in a book!!
Dont forget to post a summary back here, well be waiting.