Complex sentence: Cocktail drums were first put into production in the 1940s with the Carlton combo kit, consisting of a a vertical 20 inch bass drum, a snare drum, cymbal and other assorted percussion.
Split into simpler sentences: Cocktail drums were first put into production in the 1940s with the Carlton combo kit. It was a drum kit consisting of a vertical 20 inch bass drum, a snare drum, cymbal and other assorted percussion.