What is the TV Series about time traveling partners using a watch

IN the roughly 1980-90's there was a TV show airing in the Easter USA about two partners who had this pocket watch that was actually a time machine.

I distinctly remember an episode where the two time traveled to Thomas Edison's time and met him. Mr. Edison pick pocketed the watch and completely disassembled it to see how it worked. Panic ensued till he was able to reassemble it. Apparently in the the process it taught Mr. Edison how a light fulfillment works and was the catalyst for him inventing the Light Bulb.

Anyone know what this series was called?