At the time that Watt used this particular linkage for his steam engine it was thought that no linkage would allow an exact straight line to be traced but this, as Peaucellier showed, is not so and such a linkage was found. Tokarenko writes in:
Sa oras na Watt ginagamit ito partikular na linkage para sa kanyang singaw engine na ito ay na-iisip na walang linkage ay magpapahintulot sa isang eksaktong dumiretso na traced ngunit ito, bilang Peaucellier ipinakita, ay hindi kaya at tulad ng isang linkage ay natagpuan. Tokarenko magsusulat sa: