Compound lever could be measured. Compound lever The compound lever is a simple machine operating on the premise that the resistance from one lever in a system of levers will act as power for the next, and thus the applied force will be amplified from one lever to the next (as long as the mechanical advantage for each lever is greater than one). Almost all scales use some sort of compound lever to work. Other examples include nail clippers and piano keys. A lever arm uses the fulcrum to lift the load using and intensifying an applied force. In practice, conditions may
Lever action the cylinder to the next position and cock the internal hidden hammer. Multiple lever action designs including the Volcanic pistol were designed before the American Civil War, but the first significant lever-action designs were the Spencer repeating rifle and Henry rifle. The Spencer was a magazine-fed lever-operated breech-loading rifle designed by Christopher Spencer in 1860. It was fed from a removable seven-round tube magazine, enabling the rounds to be fired one after another, and which, when emptied, could be exchanged for another. Over 20,000 were made, and it was adopted by the United States and used during the American Civil