Bummer. He designed both Robby the Robot and the robot from Lost In Space (simply known as "Robot"), and was the lead designer for that show, creating the spacecraft sets. A few years ago my wife and I went to the EMP Science Fiction Museum to check out an exhibit that featured animatronic replicas of both robots arguing with each other. It was pretty great.

Something I learned: due to the similar urgent tone and cadence, I used to think that a single voice actor provided the voices for both robot characters, but I was wrong. Robby was voiced by Marvin Miller, while Robot's voice was by Dick Tufeld, who also did Robot's voice for the 1998 movie version of Lost In Space and a few episodes of The Simpsons.

I couldn't find any video of the EMP exhibit, so instead enjoy these classic SyFy Channel commercials featuring both robots: