When W. Greener died in 1869, his son W.W. Greener merged the two companies into one. His next patent was the self-acting striker, followed by a famous cross-bolt mechanism produced as a single top bolt, in 1865. In 1873, this cross-bolt mechanism was combined with the bottom holding down bolts to produce the "Treble Wedge-Fast" breech action. The treble wedge-fast was one of the strongest breech actions ever invented and was widely copied by other manufacturers, after the patent rights expired.