A glass button on a spring carriage, a finger probe that presses and pulls, and a dial gauge reading the lean.
SVGReact
Fig 6Press and pullPress, then pull ← →120.0 × 32.0 · lean 0.0 px
The glass while it is heldWhere it restsThe pull, from where I pressed to the fingerA 120 × 32 glass button on a test rig: a carriage on two guide rods held by four springs, a finger probe on a rail behind it, and a dial gauge that reads the lean. Pulled 80 px it leans 10.6 px.