Energy-saving elevator

An energy-saving elevator comprising:

• an elevator car;
• a counterweight;
• a lift cable interconnected between the elevator car and the counterweight, a first end of the lift cable connected to the elevator car, a second end of the lift cable connected to the counterweight;
• a hoist-type lifting mechanism, the lift cable connected to the hoist-type lifting mechanism, the hoist-type lifting mechanism comprising:
• a first adjustable pulley, the hoist-type lifting mechanism configured to lift the elevator car by pulling up the first end of the lift cable by rotating the first adjustable pulley in a first rotational direction;
• a second adjustable pulley, the hoist-type lifting mechanism configured to lift the counterweight by pulling up the second end of the lift cable by rotating the second adjustable pulley in a second rotational direction;
• and
• an adjusting cable interconnected between the first adjustable pulley and the second adjustable pulley, the first adjustable pulley and the second adjustable pulley configured to hold the adjusting cable;
• wherein the first adjustable pulley comprises:
• a first fixed conical member with a first conical surface;
• and
• a first moveable conical member with a second conical surface, the first moveable conical member configured to move linearly along a first axis, the first conical surface and the second conical surface facing each other, the first conical surface and the second conical surface forming a first trapezoid-shape groove between the first fixed conical member and the first moveable conical member, the first trapezoid-shape groove configured to receive the adjusting cable, the first conical surface and the second conical surface configured to hold the adjusting cable inside the first trapezoid-shape groove, the adjusting cable configured to move away from the first axis inside the first trapezoid-shape groove responsive to moving the first moveable conical member towards the first fixed conical member along the first axis, the adjusting cable configured to move towards the first axis inside the first trapezoid-shape groove responsive to moving the first moveable conical member away from the first fixed conical member along the first axis.