Lifts

• Power sources:

  • motors: AC, DC

  • people: crank, lift (pick up the ball put it in the top)

  • water

  • air

  • weights (wind-up)

Spiral screw

• • 1 or 2 stationary rails next to spiral - most common

  • 2-4 rails with the spiral in-between.

  • tilted

  • ("Archimedes" did not invent it!)

chain

• • w/ hooks

  • w/ magnet

arm

• ball pump - new ball pushes up on entire stack, top one "falls" out.

• Converts circular motion to L/R and U/D with two interlocked blocks

• wheel:

  • hole

  • notch

  • spiral

  • hook

  • magnetic

• Combo - Ball Pump with a Notch Wheel to feed the balls

• "mine" elevator - two sides that alternate the ball.

  • Both sides go up and down in opposite cycles - tilted inside each side

  • Both sides go up and down in opposite cycles - center part is pushed out to eject ball to other side.

  • one side goes up and down - the other is stationary.

  • both sides swing back and forth.

• Steps like an escalator without circular movement.

  • Number of cycles varies, 2-4 is common

  • method of cycle - offset cams for each step

  • top of step can be flat and relies on sides to keep in ball

  • top of step can be groved to build in sides.

• Catapults.