Nuremberg, is a compressed-air gun that fires small projectiles under the thrust of compressed air at high pressure contained in the compression chamber which also serves as the stock.
By means of a pump that is screwed onto the inlet valve, the air in the compression chamber is compressed to eight or ten atmospheres and a check valve that opens towards the inside and is kept closed by a spring, avoids spontaneous discharging.
The same valve connects the compression chamber to the barrel when, once the chamber has been filled, it is screwed down into its seat.
On pulling the trigger, the hammer is freed and, pushed by a spring, violently strikes the upper arm of a lever, pushing it forward. The lower arm thus pushes a rod backwards which opens the valve.
Under the action of the return spring the valve closes again immediately and a violent jet of air strikes the bullet previously placed at the bottom of the barrel, expelling it with a force that depends on the pressure inside.
On closing, the valve pushes the rod forward and this, acting on the lower arm of the lever, moves the upper one backwards, which brings the hammer back to its initial position. ...continues