Clyde Crashcup
Aside from the seven-minute Chipmunk segments, in which Bagdasarian's David Seville was portrayed as a hapless bachelor who managed and mentored the three singing rodents, the show also had segments featuring a character called Clyde Crashcup (voiced by Shepard Menken impersonating Richard Haydn's Edwin Carp character).
Clyde was an inventor who essentially re-invented various items and took credit for dreaming it up in the first place. His "creations" often backfired on him until his silent, level-headed lab assistant, Leonardo (diminutive, balding, and perpetually whispering in Crashcup's ear) saved him from any further self-destruction.
Read more about this topic: The Alvin Show