Transmission based on gears with spiral toothed transitions

A spiral gear transmission comprising:

• a casing having:
• a first rotating shaft, the first rotating shaft having a truncated cone portion, and
• a second rotating shaft located parallel to and spaced away from the truncated cone portion;
• a first gear wheel slidably mounted on the second rotating shaft, the first gear wheel being configured for rotation with the second rotating shaft, the first gear wheel being in a driven connection with the first rotating shaft;
• a linear actuator operatively connected to the first gear wheel, the linear actuator allowing to position the first gear wheel at any one of a plurality of positions along the second rotating shaft;
• the truncated cone portion having, at its beginning and its end, a respective one of a set of gear wheels, a diameter and a number of teeth of respective one of the set of gear wheels being proportionate to a diameter of the truncated cone portion at a respective location of the respective one of the set of gear wheels;
• at least two counter-wound spiral gear tracks extending between the respective one of the set of gear wheels and another one of the set of gear wheels;
• and
• the linear actuator being configured to move the first gear wheel between the set of gear wheels along the at least two counter-wound spiral gear tracks without changing a direction or rotation of the first rotating shaft thereby changing a transmission coefficient.