How do you break the hammerless revolver?

We need some more information to answer your question- starting with the Word "break". Many of the early hammerless revolvers were a "break action", when the revolver was loaded/ unloaded by lifting a latch at the top rear of the frame. This permitted the action to be pivoted open (or broken), and the fired cartridges ejected, and new cartridges inserted. If you mean "break" as in destroy, that is too broad to answwer here. Please feel free to leave a message on my message board, and we will try to get you a good answer.