What are the correct terms for linkages and lifts

[Abhishek R]

Originally Posted by Thad House

Technically, 254's ball lift this year was a scissor lift... Just a very short single stage one.

Does a scissor lift require the two parts to be connected in the center? IIRC, and please correct me if I'm wrong, but their pinniped was two separate mechanisms that acted individually or at the same time (so they could eject the ball out either end). If they were connected, they would never be able to remove the ball through their intakes.

[AdamHeard]

Originally Posted by Abhishek R

Does a scissor lift require the two parts to be connected in the center? IIRC, and please correct me if I'm wrong, but their pinniped was two separate mechanisms that acted individually or at the same time (so they could eject the ball out either end). If they were connected, they would never be able to remove the ball through their intakes.

Correct. The claptrap was two separate arms essentially, pneumatically toggled independently. No scissor.

[GeeTwo]

I have heard of the four-bar linkage with equal-length opposing edges referred to as a "parallelogram linkage", though I don't recall that I've ever read it.